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Sigma

Sigma rules for LAPSUS$

516 rules · scoped to actor · back to LAPSUS$
Direct rules mention this entity in their title or description. Related rules cover the techniques this entity is known to use.

Detection rules

50 of 516
related high
Invalid PIM License
Identifies when an organization doesn't have the proper license for PIM and is out of compliance.
status test author Mark Morowczynski '@markmorow', Gloria Lee, '@gleeiamglo' id 58af08eb-f9e1-43c8-9805-3ad9b0482bd8 license Sigma · DRL-1.1
view Sigma YAML
title: Invalid PIM License
id: 58af08eb-f9e1-43c8-9805-3ad9b0482bd8
status: test
description: Identifies when an organization doesn't have the proper license for PIM and is out of compliance.
references:
    - https://learn.microsoft.com/en-us/entra/id-governance/privileged-identity-management/pim-how-to-configure-security-alerts#the-organization-doesnt-have-microsoft-entra-premium-p2-or-microsoft-entra-id-governance
author: Mark Morowczynski '@markmorow', Gloria Lee, '@gleeiamglo'
date: 2023-09-14
tags:
    - attack.initial-access
    - attack.stealth
    - attack.t1078
    - attack.persistence
    - attack.privilege-escalation
logsource:
    product: azure
    service: pim
detection:
    selection:
        riskEventType: 'invalidLicenseAlertIncident'
    condition: selection
falsepositives:
    - Investigate if licenses have expired.
level: high
related high
PIM Alert Setting Changes To Disabled
Detects when PIM alerts are set to disabled.
status test author Mark Morowczynski '@markmorow', Yochana Henderson, '@Yochana-H' id aeaef14c-e5bf-4690-a9c8-835caad458bd license Sigma · DRL-1.1
view Sigma YAML
title: PIM Alert Setting Changes To Disabled
id: aeaef14c-e5bf-4690-a9c8-835caad458bd
status: test
description: Detects when PIM alerts are set to disabled.
references:
    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-privileged-identity-management#azure-ad-roles-assignment
author: Mark Morowczynski '@markmorow', Yochana Henderson, '@Yochana-H'
date: 2022-08-09
tags:
    - attack.initial-access
    - attack.persistence
    - attack.privilege-escalation
    - attack.stealth
    - attack.t1078
logsource:
    product: azure
    service: auditlogs
detection:
    selection:
        properties.message: Disable PIM Alert
    condition: selection
falsepositives:
    - Administrator disabling PIM alerts as an active choice.
level: high
related high
Azure Subscription Permission Elevation Via AuditLogs
Detects when a user has been elevated to manage all Azure Subscriptions. This change should be investigated immediately if it isn't planned. This setting could allow an attacker access to Azure subscriptions in your environment.
status test author Austin Songer @austinsonger id ca9bf243-465e-494a-9e54-bf9fc239057d license Sigma · DRL-1.1
view Sigma YAML
title: Azure Subscription Permission Elevation Via AuditLogs
id: ca9bf243-465e-494a-9e54-bf9fc239057d
status: test
description: |
    Detects when a user has been elevated to manage all Azure Subscriptions.
    This change should be investigated immediately if it isn't planned.
    This setting could allow an attacker access to Azure subscriptions in your environment.
references:
    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-privileged-accounts#assignment-and-elevation
author: Austin Songer @austinsonger
date: 2021-11-26
modified: 2022-12-25
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.initial-access
    - attack.stealth
    - attack.t1078
logsource:
    product: azure
    service: auditlogs
detection:
    selection:
        Category: 'Administrative'
        OperationName: 'Assigns the caller to user access admin'
    condition: selection
falsepositives:
    - If this was approved by System Administrator.
level: high
related high
Account Created And Deleted Within A Close Time Frame
Detects when an account was created and deleted in a short period of time.
status test author Mark Morowczynski '@markmorow', MikeDuddington, '@dudders1', Tim Shelton id 6f583da0-3a90-4566-a4ed-83c09fe18bbf license Sigma · DRL-1.1
view Sigma YAML
title: Account Created And Deleted Within A Close Time Frame
id: 6f583da0-3a90-4566-a4ed-83c09fe18bbf
status: test
description: Detects when an account was created and deleted in a short period of time.
references:
    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-user-accounts#short-lived-accounts
author: Mark Morowczynski '@markmorow', MikeDuddington, '@dudders1', Tim Shelton
date: 2022-08-11
modified: 2022-08-18
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.initial-access
    - attack.stealth
    - attack.t1078
logsource:
    product: azure
    service: auditlogs
detection:
    selection:
        properties.message:
            - Add user
            - Delete user
        Status: Success
    condition: selection
falsepositives:
    - Legit administrative action
level: high
related high
Azure Login Bypassing Conditional Access Policies
Detects a successful login to the Microsoft Intune Company Portal which could allow bypassing Conditional Access Policies and InTune device trust using a tool like TokenSmith.
status experimental author Josh Nickels, Marius Rothenbücher id 13f2d3f5-6497-44a7-bf5f-dc13ffafe5dc license Sigma · DRL-1.1
view Sigma YAML
title: Azure Login Bypassing Conditional Access Policies
id: 13f2d3f5-6497-44a7-bf5f-dc13ffafe5dc
status: experimental
description: |
    Detects a successful login to the Microsoft Intune Company Portal which could allow bypassing Conditional Access Policies and InTune device trust using a tool like TokenSmith.
author: Josh Nickels, Marius Rothenbücher
references:
    - https://labs.jumpsec.com/tokensmith-bypassing-intune-compliant-device-conditional-access/
    - https://github.com/JumpsecLabs/TokenSmith
date: 2025-01-08
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.initial-access
    - attack.stealth
    - attack.t1078
logsource:
    service: audit
    product: m365
detection:
    selection:
        Operation: 'UserLoggedIn'
        ApplicationId: '9ba1a5c7-f17a-4de9-a1f1-6178c8d51223'
        ResultStatus: 'Success'
        RequestType: 'Cmsi:Cmsi'
    filter_main_bjectid:
        ObjectId: '0000000a-0000-0000-c000-000000000000' # Microsoft Intune seen when mobile devices are enrolled
    condition: selection and not 1 of filter_main_*
falsepositives:
    - Unknown
level: high
related high
External Remote SMB Logon from Public IP
Detects successful logon from public IP address via SMB. This can indicate a publicly-exposed SMB port.
status test author Micah Babinski (@micahbabinski), Zach Mathis (@yamatosecurity) id 78d5cab4-557e-454f-9fb9-a222bd0d5edc license Sigma · DRL-1.1
view Sigma YAML
title: External Remote SMB Logon from Public IP
id: 78d5cab4-557e-454f-9fb9-a222bd0d5edc
related:
    - id: 259a9cdf-c4dd-4fa2-b243-2269e5ab18a2
      type: derived
status: test
description: Detects successful logon from public IP address via SMB. This can indicate a publicly-exposed SMB port.
references:
    - https://www.inversecos.com/2020/04/successful-4624-anonymous-logons-to.html
    - https://twitter.com/Purp1eW0lf/status/1616144561965002752
author: Micah Babinski (@micahbabinski), Zach Mathis (@yamatosecurity)
date: 2023-01-19
modified: 2024-03-11
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.initial-access
    - attack.credential-access
    - attack.stealth
    - attack.t1133
    - attack.t1078
    - attack.t1110
logsource:
    product: windows
    service: security
detection:
    selection:
        EventID: 4624
        LogonType: 3
    filter_main_local_ranges:
        IpAddress|cidr:
            - '::1/128'  # IPv6 loopback
            - '10.0.0.0/8'
            - '127.0.0.0/8'
            - '172.16.0.0/12'
            - '192.168.0.0/16'
            - '169.254.0.0/16'
            - 'fc00::/7'  # IPv6 private addresses
            - 'fe80::/10'  # IPv6 link-local addresses
    filter_main_empty:
        IpAddress: '-'
    condition: selection and not 1 of filter_main_*
falsepositives:
    - Legitimate or intentional inbound connections from public IP addresses on the SMB port.
level: high
related high
Okta New Admin Console Behaviours
Detects when Okta identifies new activity in the Admin Console.
status test author kelnage id a0b38b70-3cb5-484b-a4eb-c4d8e7bcc0a9 license Sigma · DRL-1.1
view Sigma YAML
title: Okta New Admin Console Behaviours
id: a0b38b70-3cb5-484b-a4eb-c4d8e7bcc0a9
status: test
description: Detects when Okta identifies new activity in the Admin Console.
references:
    - https://developer.okta.com/docs/reference/api/system-log/
    - https://sec.okta.com/articles/2023/08/cross-tenant-impersonation-prevention-and-detection
author: kelnage
date: 2023-09-07
modified: 2026-04-27
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.initial-access
    - attack.stealth
    - attack.t1078.004
logsource:
    product: okta
    service: okta
detection:
    selection_event:
        eventType: 'policy.evaluate_sign_on'
        target.displayName: 'Okta Admin Console'
    selection_positive:
        - debugContext.debugData.behaviors|contains: 'POSITIVE'
        - debugContext.debugData.logOnlySecurityData|contains: 'POSITIVE'
    condition: all of selection_*
falsepositives:
    - When an admin begins using the Admin Console and one of Okta's heuristics incorrectly identifies the behavior as being unusual.
level: high
related high
AWS IAM S3Browser User or AccessKey Creation
Detects S3 Browser utility creating IAM User or AccessKey.
status test author daniel.bohannon@permiso.io (@danielhbohannon) id db014773-d9d9-4792-91e5-133337c0ffee license Sigma · DRL-1.1
view Sigma YAML
title: AWS IAM S3Browser User or AccessKey Creation
id: db014773-d9d9-4792-91e5-133337c0ffee
status: test
description: Detects S3 Browser utility creating IAM User or AccessKey.
references:
    - https://permiso.io/blog/s/unmasking-guivil-new-cloud-threat-actor
author: daniel.bohannon@permiso.io (@danielhbohannon)
date: 2023-05-17
tags:
    - attack.privilege-escalation
    - attack.execution
    - attack.persistence
    - attack.initial-access
    - attack.stealth
    - attack.t1059.009
    - attack.t1078.004
logsource:
    product: aws
    service: cloudtrail
detection:
    selection:
        eventSource: 'iam.amazonaws.com'
        eventName:
            - 'CreateUser'
            - 'CreateAccessKey'
        userAgent|contains: 'S3 Browser'
    condition: selection
falsepositives:
    - Valid usage of S3 Browser for IAM User and/or AccessKey creation
level: high
related high
AWS IAM S3Browser LoginProfile Creation
Detects S3 Browser utility performing reconnaissance looking for existing IAM Users without a LoginProfile defined then (when found) creating a LoginProfile.
status test author daniel.bohannon@permiso.io (@danielhbohannon) id db014773-b1d3-46bd-ba26-133337c0ffee license Sigma · DRL-1.1
view Sigma YAML
title: AWS IAM S3Browser LoginProfile Creation
id: db014773-b1d3-46bd-ba26-133337c0ffee
status: test
description: Detects S3 Browser utility performing reconnaissance looking for existing IAM Users without a LoginProfile defined then (when found) creating a LoginProfile.
references:
    - https://permiso.io/blog/s/unmasking-guivil-new-cloud-threat-actor
author: daniel.bohannon@permiso.io (@danielhbohannon)
date: 2023-05-17
tags:
    - attack.execution
    - attack.persistence
    - attack.initial-access
    - attack.privilege-escalation
    - attack.stealth
    - attack.t1059.009
    - attack.t1078.004
logsource:
    product: aws
    service: cloudtrail
detection:
    selection:
        eventSource: 'iam.amazonaws.com'
        eventName:
            - 'GetLoginProfile'
            - 'CreateLoginProfile'
        userAgent|contains: 'S3 Browser'
    condition: selection
falsepositives:
    - Valid usage of S3 Browser for IAM LoginProfile listing and/or creation
level: high
related high
AWS IAM S3Browser Templated S3 Bucket Policy Creation
Detects S3 browser utility creating Inline IAM policy containing default S3 bucket name placeholder value of "<YOUR-BUCKET-NAME>".
status test author daniel.bohannon@permiso.io (@danielhbohannon) id db014773-7375-4f4e-b83b-133337c0ffee license Sigma · DRL-1.1
view Sigma YAML
title: AWS IAM S3Browser Templated S3 Bucket Policy Creation
id: db014773-7375-4f4e-b83b-133337c0ffee
status: test
description: Detects S3 browser utility creating Inline IAM policy containing default S3 bucket name placeholder value of "<YOUR-BUCKET-NAME>".
references:
    - https://permiso.io/blog/s/unmasking-guivil-new-cloud-threat-actor
author: daniel.bohannon@permiso.io (@danielhbohannon)
date: 2023-05-17
tags:
    - attack.execution
    - attack.stealth
    - attack.t1059.009
    - attack.persistence
    - attack.initial-access
    - attack.privilege-escalation
    - attack.t1078.004
logsource:
    product: aws
    service: cloudtrail
detection:
    selection:
        eventSource: iam.amazonaws.com
        eventName: PutUserPolicy
        userAgent|contains: 'S3 Browser'
        requestParameters|contains|all:
            - '"arn:aws:s3:::<YOUR-BUCKET-NAME>/*"'
            - '"s3:GetObject"'
            - '"Allow"'
    condition: selection
falsepositives:
    - Valid usage of S3 browser with accidental creation of default Inline IAM policy without changing default S3 bucket name placeholder value
level: high
related high
Potential MFA Bypass Using Legacy Client Authentication
Detects successful authentication from potential clients using legacy authentication via user agent strings. This could be a sign of MFA bypass using a password spray attack.
status test author Harjot Singh, '@cyb3rjy0t' id 53bb4f7f-48a8-4475-ac30-5a82ddfdf6fc license Sigma · DRL-1.1
view Sigma YAML
title: Potential MFA Bypass Using Legacy Client Authentication
id: 53bb4f7f-48a8-4475-ac30-5a82ddfdf6fc
status: test
description: Detects successful authentication from potential clients using legacy authentication via user agent strings. This could be a sign of MFA bypass using a password spray attack.
references:
    - https://web.archive.org/web/20230217071802/https://blooteem.com/march-2022
    - https://www.microsoft.com/en-us/security/blog/2021/10/26/protect-your-business-from-password-sprays-with-microsoft-dart-recommendations/
author: Harjot Singh, '@cyb3rjy0t'
date: 2023-03-20
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.initial-access
    - attack.credential-access
    - attack.stealth
    - attack.t1078.004
    - attack.t1110
logsource:
    product: azure
    service: signinlogs
detection:
    selection:
        Status: 'Success'
        userAgent|contains:
            - 'BAV2ROPC'
            - 'CBAinPROD'
            - 'CBAinTAR'
    condition: selection
falsepositives:
    - Known Legacy Accounts
level: high
related high
Sign-in Failure Due to Conditional Access Requirements Not Met
Define a baseline threshold for failed sign-ins due to Conditional Access failures
status test author Yochana Henderson, '@Yochana-H' id b4a6d707-9430-4f5f-af68-0337f52d5c42 license Sigma · DRL-1.1
view Sigma YAML
title: Sign-in Failure Due to Conditional Access Requirements Not Met
id: b4a6d707-9430-4f5f-af68-0337f52d5c42
status: test
description: Define a baseline threshold for failed sign-ins due to Conditional Access failures
references:
    - https://learn.microsoft.com/en-gb/entra/architecture/security-operations-privileged-accounts
author: Yochana Henderson, '@Yochana-H'
date: 2022-06-01
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.initial-access
    - attack.credential-access
    - attack.stealth
    - attack.t1110
    - attack.t1078.004
logsource:
    product: azure
    service: signinlogs
detection:
    selection:
        ResultType: 53003
        Resultdescription: Blocked by Conditional Access
    condition: selection
falsepositives:
    - Service Account misconfigured
    - Misconfigured Systems
    - Vulnerability Scanners
level: high
related high
Sign-ins from Non-Compliant Devices
Monitor and alert for sign-ins where the device was non-compliant.
status test author Michael Epping, '@mepples21' id 4f77e1d7-3982-4ee0-8489-abf2d6b75284 license Sigma · DRL-1.1
view Sigma YAML
title: Sign-ins from Non-Compliant Devices
id: 4f77e1d7-3982-4ee0-8489-abf2d6b75284
status: test
description: Monitor and alert for sign-ins where the device was non-compliant.
references:
    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-devices#non-compliant-device-sign-in
author: Michael Epping, '@mepples21'
date: 2022-06-28
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.initial-access
    - attack.stealth
    - attack.t1078.004
logsource:
    product: azure
    service: signinlogs
detection:
    selection:
        DeviceDetail.isCompliant: 'false'
    condition: selection
falsepositives:
    - Unknown
level: high
related high
Use of Legacy Authentication Protocols
Alert on when legacy authentication has been used on an account
status test author Yochana Henderson, '@Yochana-H' id 60f6535a-760f-42a9-be3f-c9a0a025906e license Sigma · DRL-1.1
view Sigma YAML
title: Use of Legacy Authentication Protocols
id: 60f6535a-760f-42a9-be3f-c9a0a025906e
status: test
description: Alert on when legacy authentication has been used on an account
references:
    - https://learn.microsoft.com/en-gb/entra/architecture/security-operations-privileged-accounts
author: Yochana Henderson, '@Yochana-H'
date: 2022-06-17
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.initial-access
    - attack.credential-access
    - attack.stealth
    - attack.t1078.004
    - attack.t1110
logsource:
    product: azure
    service: signinlogs
detection:
    selection:
        ActivityDetails: Sign-ins
        ClientApp:
            - Other client
            - IMAP
            - POP3
            - MAPI
            - SMTP
            - Exchange ActiveSync
            - Exchange Web Services
        Username: 'UPN'
    condition: selection
falsepositives:
    - User has been put in acception group so they can use legacy authentication
level: high
related high
Application URI Configuration Changes
Detects when a configuration change is made to an applications URI. URIs for domain names that no longer exist (dangling URIs), not using HTTPS, wildcards at the end of the domain, URIs that are no unique to that app, or URIs that point to domains you do not control should be investigated.
status test author Mark Morowczynski '@markmorow', Bailey Bercik '@baileybercik' id 0055ad1f-be85-4798-83cf-a6da17c993b3 license Sigma · DRL-1.1
view Sigma YAML
title: Application URI Configuration Changes
id: 0055ad1f-be85-4798-83cf-a6da17c993b3
status: test
description: |
    Detects when a configuration change is made to an applications URI.
    URIs for domain names that no longer exist (dangling URIs), not using HTTPS, wildcards at the end of the domain, URIs that are no unique to that app, or URIs that point to domains you do not control should be investigated.
references:
    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-applications#application-configuration-changes
author: Mark Morowczynski '@markmorow', Bailey Bercik '@baileybercik'
date: 2022-06-02
tags:
    - attack.initial-access
    - attack.stealth
    - attack.t1528
    - attack.t1078.004
    - attack.persistence
    - attack.credential-access
    - attack.privilege-escalation
logsource:
    product: azure
    service: auditlogs
detection:
    selection:
        properties.message: Update Application Sucess- Property Name AppAddress
    condition: selection
falsepositives:
    - When and administrator is making legitimate URI configuration changes to an application. This should be a planned event.
level: high
related high
PIM Approvals And Deny Elevation
Detects when a PIM elevation is approved or denied. Outside of normal operations should be investigated.
status test author Mark Morowczynski '@markmorow', Yochana Henderson, '@Yochana-H' id 039a7469-0296-4450-84c0-f6966b16dc6d license Sigma · DRL-1.1
view Sigma YAML
title: PIM Approvals And Deny Elevation
id: 039a7469-0296-4450-84c0-f6966b16dc6d
status: test
description: Detects when a PIM elevation is approved or denied. Outside of normal operations should be investigated.
references:
    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-privileged-identity-management#azure-ad-roles-assignment
author: Mark Morowczynski '@markmorow', Yochana Henderson, '@Yochana-H'
date: 2022-08-09
tags:
    - attack.persistence
    - attack.initial-access
    - attack.privilege-escalation
    - attack.stealth
    - attack.t1078.004
logsource:
    product: azure
    service: auditlogs
detection:
    selection:
        properties.message: Request Approved/Denied
    condition: selection
falsepositives:
    - Actual admin using PIM.
level: high
related high
Temporary Access Pass Added To An Account
Detects when a temporary access pass (TAP) is added to an account. TAPs added to priv accounts should be investigated
status test author Mark Morowczynski '@markmorow', Yochana Henderson, '@Yochana-H' id fa84aaf5-8142-43cd-9ec2-78cfebf878ce license Sigma · DRL-1.1
view Sigma YAML
title: Temporary Access Pass Added To An Account
id: fa84aaf5-8142-43cd-9ec2-78cfebf878ce
status: test
description: Detects when a temporary access pass (TAP) is added to an account. TAPs added to priv accounts should be investigated
references:
    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-privileged-accounts#changes-to-privileged-accounts
author: Mark Morowczynski '@markmorow', Yochana Henderson, '@Yochana-H'
date: 2022-08-10
tags:
    - attack.privilege-escalation
    - attack.initial-access
    - attack.persistence
    - attack.stealth
    - attack.t1078.004
logsource:
    product: azure
    service: auditlogs
detection:
    selection:
        properties.message: Admin registered security info
        Status: Admin registered temporary access pass method for user
    condition: selection
falsepositives:
    - Administrator adding a legitimate temporary access pass
level: high
related high
User Added To Privilege Role
Detects when a user is added to a privileged role.
status test author Mark Morowczynski '@markmorow', Yochana Henderson, '@Yochana-H' id 49a268a4-72f4-4e38-8a7b-885be690c5b5 license Sigma · DRL-1.1
view Sigma YAML
title: User Added To Privilege Role
id: 49a268a4-72f4-4e38-8a7b-885be690c5b5
status: test
description: Detects when a user is added to a privileged role.
references:
    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-privileged-identity-management#azure-ad-roles-assignment
author: Mark Morowczynski '@markmorow', Yochana Henderson, '@Yochana-H'
date: 2022-08-06
tags:
    - attack.persistence
    - attack.initial-access
    - attack.privilege-escalation
    - attack.stealth
    - attack.t1078.004
logsource:
    product: azure
    service: auditlogs
detection:
    selection:
        properties.message:
            - Add eligible member (permanent)
            - Add eligible member (eligible)
    condition: selection
falsepositives:
    - Legtimate administrator actions of adding members from a role
level: high
related high
Users Added to Global or Device Admin Roles
Monitor and alert for users added to device admin roles.
status test author Michael Epping, '@mepples21' id 11c767ae-500b-423b-bae3-b234450736ed license Sigma · DRL-1.1
view Sigma YAML
title: Users Added to Global or Device Admin Roles
id: 11c767ae-500b-423b-bae3-b234450736ed
status: test
description: Monitor and alert for users added to device admin roles.
references:
    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-devices#device-administrator-roles
author: Michael Epping, '@mepples21'
date: 2022-06-28
tags:
    - attack.persistence
    - attack.initial-access
    - attack.privilege-escalation
    - attack.stealth
    - attack.t1078.004
logsource:
    product: azure
    service: auditlogs
detection:
    selection:
        Category: RoleManagement
        OperationName|contains|all:
            - 'Add'
            - 'member to role'
        TargetResources|contains:
            - '7698a772-787b-4ac8-901f-60d6b08affd2'
            - '62e90394-69f5-4237-9190-012177145e10'
    condition: selection
falsepositives:
    - Unknown
level: high
related high
Application AppID Uri Configuration Changes
Detects when a configuration change is made to an applications AppID URI.
status test author Mark Morowczynski '@markmorow', Bailey Bercik '@baileybercik' id 1b45b0d1-773f-4f23-aedc-814b759563b1 license Sigma · DRL-1.1
view Sigma YAML
title: Application AppID Uri Configuration Changes
id: 1b45b0d1-773f-4f23-aedc-814b759563b1
status: test
description: Detects when a configuration change is made to an applications AppID URI.
references:
    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-applications#appid-uri-added-modified-or-removed
author: Mark Morowczynski '@markmorow', Bailey Bercik '@baileybercik'
date: 2022-06-02
tags:
    - attack.initial-access
    - attack.persistence
    - attack.credential-access
    - attack.privilege-escalation
    - attack.stealth
    - attack.t1552
    - attack.t1078.004
logsource:
    product: azure
    service: auditlogs
detection:
    selection:
        properties.message:
            - Update Application
            - Update Service principal
    condition: selection
falsepositives:
    - When and administrator is making legitimate AppID URI configuration changes to an application. This should be a planned event.
level: high
related high
Changes To PIM Settings
Detects when changes are made to PIM roles
status test author Mark Morowczynski '@markmorow', Yochana Henderson, '@Yochana-H' id db6c06c4-bf3b-421c-aa88-15672b88c743 license Sigma · DRL-1.1
view Sigma YAML
title: Changes To PIM Settings
id: db6c06c4-bf3b-421c-aa88-15672b88c743
status: test
description: Detects when changes are made to PIM roles
references:
    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-privileged-identity-management#azure-ad-roles-assignment
author: Mark Morowczynski '@markmorow', Yochana Henderson, '@Yochana-H'
date: 2022-08-09
tags:
    - attack.initial-access
    - attack.privilege-escalation
    - attack.persistence
    - attack.stealth
    - attack.t1078.004
logsource:
    product: azure
    service: auditlogs
detection:
    selection:
        properties.message: Update role setting in PIM
    condition: selection
falsepositives:
    - Legit administrative PIM setting configuration changes
level: high
related high
Azure Subscription Permission Elevation Via ActivityLogs
Detects when a user has been elevated to manage all Azure Subscriptions. This change should be investigated immediately if it isn't planned. This setting could allow an attacker access to Azure subscriptions in your environment.
status test author Austin Songer @austinsonger id 09438caa-07b1-4870-8405-1dbafe3dad95 license Sigma · DRL-1.1
view Sigma YAML
title: Azure Subscription Permission Elevation Via ActivityLogs
id: 09438caa-07b1-4870-8405-1dbafe3dad95
status: test
description: |
    Detects when a user has been elevated to manage all Azure Subscriptions.
    This change should be investigated immediately if it isn't planned.
    This setting could allow an attacker access to Azure subscriptions in your environment.
references:
    - https://learn.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations#microsoftauthorization
author: Austin Songer @austinsonger
date: 2021-11-26
modified: 2022-08-23
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.initial-access
    - attack.stealth
    - attack.t1078.004
logsource:
    product: azure
    service: activitylogs
detection:
    selection:
        operationName: MICROSOFT.AUTHORIZATION/ELEVATEACCESS/ACTION
    condition: selection
falsepositives:
    - If this was approved by System Administrator.
level: high
related high
SharpHound Recon Account Discovery
Detects remote RPC calls useb by SharpHound to map remote connections and local group membership.
status test author Sagie Dulce, Dekel Paz id 65f77b1e-8e79-45bf-bb67-5988a8ce45a5 license Sigma · DRL-1.1
view Sigma YAML
title: SharpHound Recon Account Discovery
id: 65f77b1e-8e79-45bf-bb67-5988a8ce45a5
status: test
description: Detects remote RPC calls useb by SharpHound to map remote connections and local group membership.
references:
    - https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-wkst/55118c55-2122-4ef9-8664-0c1ff9e168f3
    - https://github.com/jsecurity101/MSRPC-to-ATTACK/blob/ddd4608fe8684fcf2fcf9b48c5f0b3c28097f8a3/documents/MS-WKST.md
    - https://github.com/zeronetworks/rpcfirewall
    - https://zeronetworks.com/blog/stopping-lateral-movement-via-the-rpc-firewall/
author: Sagie Dulce, Dekel Paz
date: 2022-01-01
tags:
    - attack.t1087
    - attack.discovery
logsource:
    product: rpc_firewall
    category: application
    definition: 'Requirements: install and apply the RPC Firewall to all processes with "audit:true action:block uuid:6bffd098-a112-3610-9833-46c3f87e345a opnum:2'
detection:
    selection:
        EventLog: RPCFW
        EventID: 3
        InterfaceUuid: 6bffd098-a112-3610-9833-46c3f87e345a
        OpNum: 2
    condition: selection
falsepositives:
    - Unknown
level: high
related high
HackTool - winPEAS Execution
WinPEAS is a script that search for possible paths to escalate privileges on Windows hosts. The checks are explained on book.hacktricks.xyz
status test author Georg Lauenstein (sure[secure]) id 98b53e78-ebaf-46f8-be06-421aafd176d9 license Sigma · DRL-1.1
view Sigma YAML
title: HackTool - winPEAS Execution
id: 98b53e78-ebaf-46f8-be06-421aafd176d9
status: test
description: WinPEAS is a script that search for possible paths to escalate privileges on Windows hosts. The checks are explained on book.hacktricks.xyz
references:
    - https://github.com/carlospolop/PEASS-ng
    - https://book.hacktricks.xyz/windows-hardening/windows-local-privilege-escalation
author: Georg Lauenstein (sure[secure])
date: 2022-09-19
modified: 2023-03-23
tags:
    - attack.privilege-escalation
    - attack.discovery
    - attack.t1082
    - attack.t1087
    - attack.t1046
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - OriginalFileName: 'winPEAS.exe'
        - Image|endswith:
              - '\winPEASany_ofs.exe'
              - '\winPEASany.exe'
              - '\winPEASx64_ofs.exe'
              - '\winPEASx64.exe'
              - '\winPEASx86_ofs.exe'
              - '\winPEASx86.exe'
    selection_cli_option:
        CommandLine|contains:
            - ' applicationsinfo' # Search installed applications information
            - ' browserinfo' # Search browser information
            - ' eventsinfo' # Display interesting events information
            - ' fileanalysis' # Search specific files that can contains credentials and for regexes inside files
            - ' filesinfo' # Search generic files that can contains credentials
            - ' processinfo' # Search processes information
            - ' servicesinfo' # Search services information
            - ' windowscreds' # Search windows credentials
    selection_cli_dl:
        CommandLine|contains: 'https://github.com/carlospolop/PEASS-ng/releases/latest/download/'
    selection_cli_specific:
        - ParentCommandLine|endswith: ' -linpeas'
        - CommandLine|endswith: ' -linpeas'
    condition: 1 of selection_*
falsepositives:
    - Unlikely
level: high
related high
HackTool - SOAPHound Execution
Detects the execution of SOAPHound, a .NET tool for collecting Active Directory data, using specific command-line arguments that may indicate an attempt to extract sensitive AD information.
status test author @kostastsale id e92a4287-e072-4a40-9739-370c106bb750 license Sigma · DRL-1.1
view Sigma YAML
title: HackTool - SOAPHound Execution
id: e92a4287-e072-4a40-9739-370c106bb750
status: test
description: |
    Detects the execution of SOAPHound, a .NET tool for collecting Active Directory data, using specific command-line arguments that may indicate an attempt to extract sensitive AD information.
references:
    - https://github.com/FalconForceTeam/SOAPHound
    - https://medium.com/falconforce/soaphound-tool-to-collect-active-directory-data-via-adws-165aca78288c
author: '@kostastsale'
date: 2024-01-26
tags:
    - attack.discovery
    - attack.t1087
logsource:
    product: windows
    category: process_creation
detection:
    selection_1:
        CommandLine|contains:
            - ' --buildcache '
            - ' --bhdump '
            - ' --certdump '
            - ' --dnsdump '
    selection_2:
        CommandLine|contains:
            - ' -c '
            - ' --cachefilename '
            - ' -o '
            - ' --outputdirectory'
    condition: all of selection_*
falsepositives:
    - Unknown
level: high
related high
PUA - Seatbelt Execution
Detects the execution of the PUA/Recon tool Seatbelt via PE information of command line parameters
status test author Nasreddine Bencherchali (Nextron Systems) id 38646daa-e78f-4ace-9de0-55547b2d30da license Sigma · DRL-1.1
view Sigma YAML
title: PUA - Seatbelt Execution
id: 38646daa-e78f-4ace-9de0-55547b2d30da
status: test
description: Detects the execution of the PUA/Recon tool Seatbelt via PE information of command line parameters
references:
    - https://github.com/GhostPack/Seatbelt
    - https://www.bluetangle.dev/2022/08/fastening-seatbelt-on-threat-hunting.html
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-10-18
modified: 2023-02-04
tags:
    - attack.discovery
    - attack.t1526
    - attack.t1087
    - attack.t1083
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith: '\Seatbelt.exe'
        - OriginalFileName: 'Seatbelt.exe'
        - Description: 'Seatbelt'
        - CommandLine|contains:
              # This just a list of the commands that will produce the least amount of FP in "theory"
              # Comment out/in as needed in your environment
              # To get the full list of commands see reference section
              - ' DpapiMasterKeys'
              - ' InterestingProcesses'
              - ' InterestingFiles'
              - ' CertificateThumbprints'
              - ' ChromiumBookmarks'
              - ' ChromiumHistory'
              - ' ChromiumPresence'
              - ' CloudCredentials'
              - ' CredEnum'
              - ' CredGuard'
              - ' FirefoxHistory'
              - ' ProcessCreationEvents'
              # - ' RDPSessions'
              # - ' PowerShellHistory'
    selection_group_list:
        CommandLine|contains:
            - ' -group=misc'
            - ' -group=remote'
            - ' -group=chromium'
            - ' -group=slack'
            - ' -group=system'
            - ' -group=user'
            - ' -group=all'
    selection_group_output:
        CommandLine|contains: ' -outputfile='
    condition: selection_img or all of selection_group_*
falsepositives:
    - Unlikely
level: high
related high
Network Reconnaissance Activity
Detects a set of suspicious network related commands often used in recon stages
status test author Florian Roth (Nextron Systems) id e6313acd-208c-44fc-a0ff-db85d572e90e license Sigma · DRL-1.1
view Sigma YAML
title: Network Reconnaissance Activity
id: e6313acd-208c-44fc-a0ff-db85d572e90e
status: test
description: Detects a set of suspicious network related commands often used in recon stages
references:
    - https://thedfirreport.com/2022/02/07/qbot-likes-to-move-it-move-it/
author: Florian Roth (Nextron Systems)
date: 2022-02-07
tags:
    - attack.discovery
    - attack.t1087
    - attack.t1082
    - car.2016-03-001
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        CommandLine|contains|all:
            - 'nslookup'
            - '_ldap._tcp.dc._msdcs.'
    condition: selection
falsepositives:
    - False positives depend on scripts and administrative tools used in the monitored environment
level: high
related high
PUA - Suspicious ActiveDirectory Enumeration Via AdFind.EXE
Detects active directory enumeration activity using known AdFind CLI flags
status test author frack113 id 455b9d50-15a1-4b99-853f-8d37655a4c1b license Sigma · DRL-1.1
view Sigma YAML
title: PUA - Suspicious ActiveDirectory Enumeration Via AdFind.EXE
id: 455b9d50-15a1-4b99-853f-8d37655a4c1b
related:
    - id: 9a132afa-654e-11eb-ae93-0242ac130002
      type: similar
    - id: 514e7e3e-b3b4-4a67-af60-be20f139198b
      type: similar
status: test
description: Detects active directory enumeration activity using known AdFind CLI flags
references:
    - https://www.joeware.net/freetools/tools/adfind/
    - https://social.technet.microsoft.com/wiki/contents/articles/7535.adfind-command-examples.aspx
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1087.002/T1087.002.md
author: frack113
date: 2021-12-13
modified: 2023-03-05
tags:
    - attack.discovery
    - attack.t1087.002
logsource:
    product: windows
    category: process_creation
detection:
    selection_password: # Listing password policy
        CommandLine|contains:
            - lockoutduration
            - lockoutthreshold
            - lockoutobservationwindow
            - maxpwdage
            - minpwdage
            - minpwdlength
            - pwdhistorylength
            - pwdproperties
    selection_enum_ad: # Enumerate Active Directory Admins
        CommandLine|contains: '-sc admincountdmp'
    selection_enum_exchange: # Enumerate Active Directory Exchange AD Objects
        CommandLine|contains: '-sc exchaddresses'
    condition: 1 of selection_*
falsepositives:
    - Authorized administrative activity
level: high
regression_tests_path: regression_data/rules/windows/process_creation/proc_creation_win_pua_adfind_enumeration/info.yml
related high
Suspicious Active Directory Database Snapshot Via ADExplorer
Detects the execution of Sysinternals ADExplorer with the "-snapshot" flag in order to save a local copy of the active directory database to a suspicious directory. This can be used by attackers to extract data for Bloodhound, usernames for password spraying or use the meta data for social engineering. The snapshot doesn't contain password hashes but there have been cases, where administrators put passwords in the comment field.
status test author Nasreddine Bencherchali (Nextron Systems) id ef61af62-bc74-4f58-b49b-626448227652 license Sigma · DRL-1.1
view Sigma YAML
title: Suspicious Active Directory Database Snapshot Via ADExplorer
id: ef61af62-bc74-4f58-b49b-626448227652
related:
    - id: 9212f354-7775-4e28-9c9f-8f0a4544e664
      type: derived
status: test
description: Detects the execution of Sysinternals ADExplorer with the "-snapshot" flag in order to save a local copy of the active directory database to a suspicious directory. This can be used by attackers to extract data for Bloodhound, usernames for password spraying or use the meta data for social engineering. The snapshot doesn't contain password hashes but there have been cases, where administrators put passwords in the comment field.
references:
    - https://www.documentcloud.org/documents/5743766-Global-Threat-Report-2019.html
    - https://learn.microsoft.com/de-de/sysinternals/downloads/adexplorer
    - https://github.com/c3c/ADExplorerSnapshot.py/tree/f700904defac330802bbfedd1d8ffd9248f4ee24
    - https://www.packetlabs.net/posts/scattered-spider-is-a-young-ransomware-gang-exploiting-large-corporations/
    - https://www.nccgroup.com/us/research-blog/lapsus-recent-techniques-tactics-and-procedures/
    - https://trustedsec.com/blog/adexplorer-on-engagements
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-03-14
modified: 2025-07-09
tags:
    - attack.discovery
    - attack.t1087.002
    - attack.t1069.002
    - attack.t1482
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith:
              - '\ADExp.exe'
              - '\ADExplorer.exe'
              - '\ADExplorer64.exe'
              - '\ADExplorer64a.exe'
        - OriginalFileName: 'AdExp'
        - Description: 'Active Directory Editor'
        - Product: 'Sysinternals ADExplorer'
    selection_flag:
        CommandLine|contains: 'snapshot'
    selection_paths:
        CommandLine|contains:
            # TODO: Add more suspicious paths
            - '\Downloads\'
            - '\Users\Public\'
            - '\AppData\'
            - '\Windows\Temp\'
    condition: all of selection_*
falsepositives:
    - Unknown
level: high
related high
AD Privileged Users or Groups Reconnaissance
Detect priv users or groups recon based on 4661 eventid and known privileged users or groups SIDs
status test author Samir Bousseaden id 35ba1d85-724d-42a3-889f-2e2362bcaf23 license Sigma · DRL-1.1
view Sigma YAML
title: AD Privileged Users or Groups Reconnaissance
id: 35ba1d85-724d-42a3-889f-2e2362bcaf23
status: test
description: Detect priv users or groups recon based on 4661 eventid and known privileged users or groups SIDs
references:
    - https://web.archive.org/web/20230329163438/https://blog.menasec.net/2019/02/threat-hunting-5-detecting-enumeration.html
author: Samir Bousseaden
date: 2019-04-03
modified: 2022-07-13
tags:
    - attack.discovery
    - attack.t1087.002
logsource:
    product: windows
    service: security
    definition: 'Requirements: enable Object Access SAM on your Domain Controllers'
detection:
    selection:
        EventID: 4661
        ObjectType:
            - 'SAM_USER'
            - 'SAM_GROUP'
    selection_object:
        - ObjectName|endswith:
              - '-512'
              - '-502'
              - '-500'
              - '-505'
              - '-519'
              - '-520'
              - '-544'
              - '-551'
              - '-555'
        - ObjectName|contains: 'admin'
    filter:
        SubjectUserName|endswith: '$'
    condition: selection and selection_object and not filter
falsepositives:
    - If source account name is not an admin then its super suspicious
level: high
related high
Reconnaissance Activity
Detects activity as "net user administrator /domain" and "net group domain admins /domain"
status test author Florian Roth (Nextron Systems), Jack Croock (method), Jonhnathan Ribeiro (improvements), oscd.community id 968eef52-9cff-4454-8992-1e74b9cbad6c license Sigma · DRL-1.1
view Sigma YAML
title: Reconnaissance Activity
id: 968eef52-9cff-4454-8992-1e74b9cbad6c
status: test
description: Detects activity as "net user administrator /domain" and "net group domain admins /domain"
references:
    - https://findingbad.blogspot.de/2017/01/hunting-what-does-it-look-like.html
author: Florian Roth (Nextron Systems), Jack Croock (method), Jonhnathan Ribeiro (improvements), oscd.community
date: 2017-03-07
modified: 2022-08-22
tags:
    - attack.discovery
    - attack.t1087.002
    - attack.t1069.002
    - attack.s0039
logsource:
    product: windows
    service: security
    definition: The volume of Event ID 4661 is high on Domain Controllers and therefore "Audit SAM" and "Audit Kernel Object" advanced audit policy settings are not configured in the recommendations for server systems
detection:
    selection:
        EventID: 4661
        AccessMask: '0x2d'
        ObjectType:
            - 'SAM_USER'
            - 'SAM_GROUP'
        ObjectName|startswith: 'S-1-5-21-'
        ObjectName|endswith:
            - '-500'
            - '-512'
    condition: selection
falsepositives:
    - Administrator activity
level: high
related high
Discovery Using AzureHound
Detects AzureHound (A BloodHound data collector for Microsoft Azure) activity via the default User-Agent that is used during its operation after successful authentication.
status test author Janantha Marasinghe id 35b781cc-1a08-4a5a-80af-42fd7c315c6b license Sigma · DRL-1.1
view Sigma YAML
title: Discovery Using AzureHound
id: 35b781cc-1a08-4a5a-80af-42fd7c315c6b
status: test
description: Detects AzureHound (A BloodHound data collector for Microsoft Azure) activity via the default User-Agent that is used during its operation after successful authentication.
references:
    - https://github.com/BloodHoundAD/AzureHound
author: Janantha Marasinghe
date: 2022-11-27
tags:
    - attack.discovery
    - attack.t1087.004
    - attack.t1526
logsource:
    product: azure
    service: signinlogs
detection:
    selection:
        userAgent|contains: 'azurehound'
        ResultType: 0
    condition: selection
falsepositives:
    - Unknown
level: high
related high
OpenCanary - HTTPPROXY Login Attempt
Detects instances where an HTTPPROXY service on an OpenCanary node has had an attempt to proxy another page.
status test author Security Onion Solutions id 5498fc09-adc6-4804-b9d9-5cca1f0b8760 license Sigma · DRL-1.1
view Sigma YAML
title: OpenCanary - HTTPPROXY Login Attempt
id: 5498fc09-adc6-4804-b9d9-5cca1f0b8760
status: test
description: |
    Detects instances where an HTTPPROXY service on an OpenCanary node has had an attempt to proxy another page.
references:
    - https://opencanary.readthedocs.io/en/latest/starting/configuration.html#services-configuration
    - https://github.com/thinkst/opencanary/blob/a0896adfcaf0328cfd5829fe10d2878c7445138e/opencanary/logger.py#L52
author: Security Onion Solutions
date: 2024-03-08
tags:
    - attack.initial-access
    - attack.command-and-control
    - attack.t1090
logsource:
    category: application
    product: opencanary
detection:
    selection:
        logtype: 7001
    condition: selection
falsepositives:
    - Unlikely
level: high
related high
Malicious IP Address Sign-In Failure Rate
Indicates sign-in from a malicious IP address based on high failure rates.
status test author Mark Morowczynski '@markmorow', Gloria Lee, '@gleeiamglo' id a3f55ebd-0c01-4ed6-adc0-8fb76d8cd3cd license Sigma · DRL-1.1
view Sigma YAML
title: Malicious IP Address Sign-In Failure Rate
id: a3f55ebd-0c01-4ed6-adc0-8fb76d8cd3cd
status: test
description: Indicates sign-in from a malicious IP address based on high failure rates.
references:
    - https://learn.microsoft.com/en-us/entra/id-protection/concept-identity-protection-risks#malicious-ip-address
    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-user-accounts#unusual-sign-ins
author: Mark Morowczynski '@markmorow', Gloria Lee, '@gleeiamglo'
date: 2023-09-07
tags:
    - attack.t1090
    - attack.command-and-control
logsource:
    product: azure
    service: riskdetection
detection:
    selection:
        riskEventType: 'maliciousIPAddress'
    condition: selection
falsepositives:
    - We recommend investigating the sessions flagged by this detection in the context of other sign-ins from the user.
level: high
related high
Malicious IP Address Sign-In Suspicious
Indicates sign-in from a malicious IP address known to be malicious at time of sign-in.
status test author Mark Morowczynski '@markmorow', Gloria Lee, '@gleeiamglo' id 36440e1c-5c22-467a-889b-593e66498472 license Sigma · DRL-1.1
view Sigma YAML
title: Malicious IP Address Sign-In Suspicious
id: 36440e1c-5c22-467a-889b-593e66498472
status: test
description: Indicates sign-in from a malicious IP address known to be malicious at time of sign-in.
references:
    - https://learn.microsoft.com/en-us/entra/id-protection/concept-identity-protection-risks#malicious-ip-address
    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-user-accounts#unusual-sign-ins
author: Mark Morowczynski '@markmorow', Gloria Lee, '@gleeiamglo'
date: 2023-09-07
tags:
    - attack.t1090
    - attack.command-and-control
logsource:
    product: azure
    service: riskdetection
detection:
    selection:
        riskEventType: 'suspiciousIPAddress'
    condition: selection
falsepositives:
    - We recommend investigating the sessions flagged by this detection in the context of other sign-ins from the user.
level: high
related high
Sign-In From Malware Infected IP
Indicates sign-ins from IP addresses infected with malware that is known to actively communicate with a bot server.
status test author Mark Morowczynski '@markmorow', Gloria Lee, '@gleeiamglo' id 821b4dc3-1295-41e7-b157-39ab212dd6bd license Sigma · DRL-1.1
view Sigma YAML
title: Sign-In From Malware Infected IP
id: 821b4dc3-1295-41e7-b157-39ab212dd6bd
status: test
description: Indicates sign-ins from IP addresses infected with malware that is known to actively communicate with a bot server.
references:
    - https://learn.microsoft.com/en-us/entra/id-protection/concept-identity-protection-risks#malware-linked-ip-address-deprecated
    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-user-accounts#unusual-sign-ins
author: Mark Morowczynski '@markmorow', Gloria Lee, '@gleeiamglo'
date: 2023-09-03
tags:
    - attack.t1090
    - attack.command-and-control
logsource:
    product: azure
    service: riskdetection
detection:
    selection:
        riskEventType: 'malwareInfectedIPAddress'
    condition: selection
falsepositives:
    - Using an IP address that is shared by many users
level: high
related high
Communication To LocaltoNet Tunneling Service Initiated - Linux
Detects an executable initiating a network connection to "LocaltoNet" tunneling sub-domains. LocaltoNet is a reverse proxy that enables localhost services to be exposed to the Internet. Attackers have been seen to use this service for command-and-control activities to bypass MFA and perimeter controls.
status test author Andreas Braathen (mnemonic.io) id c4568f5d-131f-4e78-83d4-45b2da0ec4f1 license Sigma · DRL-1.1
view Sigma YAML
title: Communication To LocaltoNet Tunneling Service Initiated - Linux
id: c4568f5d-131f-4e78-83d4-45b2da0ec4f1
status: test
description: |
    Detects an executable initiating a network connection to "LocaltoNet" tunneling sub-domains.
    LocaltoNet is a reverse proxy that enables localhost services to be exposed to the Internet.
    Attackers have been seen to use this service for command-and-control activities to bypass MFA and perimeter controls.
references:
    - https://localtonet.com/documents/supported-tunnels
    - https://cloud.google.com/blog/topics/threat-intelligence/unc3944-targets-saas-applications
author: Andreas Braathen (mnemonic.io)
date: 2024-06-17
tags:
    - attack.command-and-control
    - attack.t1572
    - attack.t1090
    - attack.t1102
logsource:
    category: network_connection
    product: linux
detection:
    selection:
        DestinationHostname|endswith:
            - '.localto.net'
            - '.localtonet.com'
        Initiated: 'true'
    condition: selection
falsepositives:
    - Legitimate use of the LocaltoNet service.
level: high
related high
Communication To Ngrok Tunneling Service - Linux
Detects an executable accessing an ngrok tunneling endpoint, which could be a sign of forbidden exfiltration of data exfiltration by malicious actors
status test author Florian Roth (Nextron Systems) id 19bf6fdb-7721-4f3d-867f-53467f6a5db6 license Sigma · DRL-1.1
view Sigma YAML
title: Communication To Ngrok Tunneling Service - Linux
id: 19bf6fdb-7721-4f3d-867f-53467f6a5db6
status: test
description: Detects an executable accessing an ngrok tunneling endpoint, which could be a sign of forbidden exfiltration of data exfiltration by malicious actors
references:
    - https://twitter.com/hakluke/status/1587733971814977537/photo/1
    - https://ngrok.com/docs/secure-tunnels/tunnels/ssh-reverse-tunnel-agent
author: Florian Roth (Nextron Systems)
date: 2022-11-03
tags:
    - attack.exfiltration
    - attack.command-and-control
    - attack.t1567
    - attack.t1568.002
    - attack.t1572
    - attack.t1090
    - attack.t1102
    - attack.s0508
logsource:
    product: linux
    category: network_connection
detection:
    selection:
        DestinationHostname|contains:
            - 'tunnel.us.ngrok.com'
            - 'tunnel.eu.ngrok.com'
            - 'tunnel.ap.ngrok.com'
            - 'tunnel.au.ngrok.com'
            - 'tunnel.sa.ngrok.com'
            - 'tunnel.jp.ngrok.com'
            - 'tunnel.in.ngrok.com'
    condition: selection
falsepositives:
    - Legitimate use of ngrok
level: high
related high
Communication To LocaltoNet Tunneling Service Initiated
Detects an executable initiating a network connection to "LocaltoNet" tunneling sub-domains. LocaltoNet is a reverse proxy that enables localhost services to be exposed to the Internet. Attackers have been seen to use this service for command-and-control activities to bypass MFA and perimeter controls.
status test author Andreas Braathen (mnemonic.io) id 3ab65069-d82a-4d44-a759-466661a082d1 license Sigma · DRL-1.1
view Sigma YAML
title: Communication To LocaltoNet Tunneling Service Initiated
id: 3ab65069-d82a-4d44-a759-466661a082d1
status: test
description: |
    Detects an executable initiating a network connection to "LocaltoNet" tunneling sub-domains.
    LocaltoNet is a reverse proxy that enables localhost services to be exposed to the Internet.
    Attackers have been seen to use this service for command-and-control activities to bypass MFA and perimeter controls.
references:
    - https://localtonet.com/documents/supported-tunnels
    - https://cloud.google.com/blog/topics/threat-intelligence/unc3944-targets-saas-applications
author: Andreas Braathen (mnemonic.io)
date: 2024-06-17
tags:
    - attack.command-and-control
    - attack.t1572
    - attack.t1090
    - attack.t1102
logsource:
    category: network_connection
    product: windows
detection:
    selection:
        DestinationHostname|endswith:
            - '.localto.net'
            - '.localtonet.com'
        Initiated: 'true'
    condition: selection
falsepositives:
    - Legitimate use of the LocaltoNet service.
level: high
related high
Communication To Ngrok Tunneling Service Initiated
Detects an executable initiating a network connection to "ngrok" tunneling domains. Attackers were seen using this "ngrok" in order to store their second stage payloads and malware. While communication with such domains can be legitimate, often times is a sign of either data exfiltration by malicious actors or additional download.
status test author Florian Roth (Nextron Systems) id 1d08ac94-400d-4469-a82f-daee9a908849 license Sigma · DRL-1.1
view Sigma YAML
title: Communication To Ngrok Tunneling Service Initiated
id: 1d08ac94-400d-4469-a82f-daee9a908849
related:
    - id: 18249279-932f-45e2-b37a-8925f2597670
      type: similar
status: test
description: |
    Detects an executable initiating a network connection to "ngrok" tunneling domains.
    Attackers were seen using this "ngrok" in order to store their second stage payloads and malware.
    While communication with such domains can be legitimate, often times is a sign of either data exfiltration by malicious actors or additional download.
references:
    - https://twitter.com/hakluke/status/1587733971814977537/photo/1
    - https://ngrok.com/docs/secure-tunnels/tunnels/ssh-reverse-tunnel-agent
author: Florian Roth (Nextron Systems)
date: 2022-11-03
modified: 2024-02-02
tags:
    - attack.exfiltration
    - attack.command-and-control
    - attack.t1567
    - attack.t1568.002
    - attack.t1572
    - attack.t1090
    - attack.t1102
    - attack.s0508
logsource:
    category: network_connection
    product: windows
detection:
    selection:
        DestinationHostname|contains:
            - 'tunnel.us.ngrok.com'
            - 'tunnel.eu.ngrok.com'
            - 'tunnel.ap.ngrok.com'
            - 'tunnel.au.ngrok.com'
            - 'tunnel.sa.ngrok.com'
            - 'tunnel.jp.ngrok.com'
            - 'tunnel.in.ngrok.com'
    condition: selection
falsepositives:
    - Legitimate use of the ngrok service.
level: high
related high
RDP Port Forwarding Rule Added Via Netsh.EXE
Detects the execution of netsh to configure a port forwarding of port 3389 (RDP) rule
status test author Florian Roth (Nextron Systems), oscd.community id 782d6f3e-4c5d-4b8c-92a3-1d05fed72e63 license Sigma · DRL-1.1
view Sigma YAML
title: RDP Port Forwarding Rule Added Via Netsh.EXE
id: 782d6f3e-4c5d-4b8c-92a3-1d05fed72e63
status: test
description: Detects the execution of netsh to configure a port forwarding of port 3389 (RDP) rule
references:
    - https://www.fireeye.com/blog/threat-research/2019/01/bypassing-network-restrictions-through-rdp-tunneling.html
author: Florian Roth (Nextron Systems), oscd.community
date: 2019-01-29
modified: 2023-02-13
tags:
    - attack.lateral-movement
    - attack.command-and-control
    - attack.t1090
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith: '\netsh.exe'
        - OriginalFileName: 'netsh.exe'
    selection_cli:
        CommandLine|contains|all:
            - ' i'
            - ' p'
            - '=3389'
            - ' c'
    condition: all of selection_*
falsepositives:
    - Legitimate administration activity
level: high
related high
PUA - NPS Tunneling Tool Execution
Detects the use of NPS, a port forwarding and intranet penetration proxy server
status test author Florian Roth (Nextron Systems) id 68d37776-61db-42f5-bf54-27e87072d17e license Sigma · DRL-1.1
view Sigma YAML
title: PUA - NPS Tunneling Tool Execution
id: 68d37776-61db-42f5-bf54-27e87072d17e
status: test
description: Detects the use of NPS, a port forwarding and intranet penetration proxy server
references:
    - https://github.com/ehang-io/nps
author: Florian Roth (Nextron Systems)
date: 2022-10-08
modified: 2024-11-23
tags:
    - attack.command-and-control
    - attack.t1090
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        Image|endswith: '\npc.exe'
    selection_cli_1:
        CommandLine|contains|all:
            - ' -server='
            - ' -vkey='
            - ' -password='
    selection_cli_2:
        CommandLine|contains: ' -config=npc'
    selection_hashes:
        # v0.26.10
        Hashes|contains:
            - "MD5=AE8ACF66BFE3A44148964048B826D005"
            - "SHA1=CEA49E9B9B67F3A13AD0BE1C2655293EA3C18181"
            - "SHA256=5A456283392FFCEEEACA3D3426C306EB470304637520D72FED1CC1FEBBBD6856"
    condition: 1 of selection_*
falsepositives:
    - Legitimate use
level: high
related high
HackTool - Htran/NATBypass Execution
Detects executable names or flags used by Htran or Htran-like tools (e.g. NATBypass)
status test author Florian Roth (Nextron Systems) id f5e3b62f-e577-4e59-931e-0a15b2b94e1e license Sigma · DRL-1.1
view Sigma YAML
title: HackTool - Htran/NATBypass Execution
id: f5e3b62f-e577-4e59-931e-0a15b2b94e1e
status: test
description: Detects executable names or flags used by Htran or Htran-like tools (e.g. NATBypass)
references:
    - https://github.com/HiwinCN/HTran
    - https://github.com/cw1997/NATBypass
author: Florian Roth (Nextron Systems)
date: 2022-12-27
modified: 2023-02-04
tags:
    - attack.command-and-control
    - attack.t1090
    - attack.s0040
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        Image|endswith:
            - '\htran.exe'
            - '\lcx.exe'
    selection_cli:
        CommandLine|contains:
            - '.exe -tran '
            - '.exe -slave '
    condition: 1 of selection_*
falsepositives:
    - Unknown
level: high
related high
PUA - Fast Reverse Proxy (FRP) Execution
Detects the use of Fast Reverse Proxy. frp is a fast reverse proxy to help you expose a local server behind a NAT or firewall to the Internet.
status test author frack113, Florian Roth id 32410e29-5f94-4568-b6a3-d91a8adad863 license Sigma · DRL-1.1
view Sigma YAML
title: PUA - Fast Reverse Proxy (FRP) Execution
id: 32410e29-5f94-4568-b6a3-d91a8adad863
status: test
description: Detects the use of Fast Reverse Proxy. frp is a fast reverse proxy to help you expose a local server behind a NAT or firewall to the Internet.
references:
    - https://asec.ahnlab.com/en/38156/
    - https://github.com/fatedier/frp
author: frack113, Florian Roth
date: 2022-09-02
modified: 2024-11-23
tags:
    - attack.command-and-control
    - attack.t1090
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        Image|endswith:
            - '\frpc.exe'
            - '\frps.exe'
    selection_cli:
        CommandLine|contains: '\frpc.ini'
    selection_hashes:
        # v0.44.0
        Hashes|contains:
            - "MD5=7D9C233B8C9E3F0EA290D2B84593C842"
            - "SHA1=06DDC9280E1F1810677935A2477012960905942F"
            - "SHA256=57B0936B8D336D8E981C169466A15A5FD21A7D5A2C7DAF62D5E142EE860E387C"
    condition: 1 of selection_*
falsepositives:
    - Legitimate use
level: high
related high
PUA- IOX Tunneling Tool Execution
Detects the use of IOX - a tool for port forwarding and intranet proxy purposes
status test author Florian Roth (Nextron Systems) id d7654f02-e04b-4934-9838-65c46f187ebc license Sigma · DRL-1.1
view Sigma YAML
title: PUA- IOX Tunneling Tool Execution
id: d7654f02-e04b-4934-9838-65c46f187ebc
status: test
description: Detects the use of IOX - a tool for port forwarding and intranet proxy purposes
references:
    - https://github.com/EddieIvan01/iox
author: Florian Roth (Nextron Systems)
date: 2022-10-08
modified: 2024-11-23
tags:
    - attack.command-and-control
    - attack.t1090
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith: '\iox.exe'
    selection_commandline:
        CommandLine|contains:
            - '.exe fwd -l '
            - '.exe fwd -r '
            - '.exe proxy -l '
            - '.exe proxy -r '
    selection_hashes:
        # v0.4
        Hashes|contains:
            - "MD5=9DB2D314DD3F704A02051EF5EA210993"
            - "SHA1=039130337E28A6623ECF9A0A3DA7D92C5964D8DD"
            - "SHA256=C6CF82919B809967D9D90EA73772A8AA1C1EB3BC59252D977500F64F1A0D6731"
    condition: 1 of selection*
falsepositives:
    - Legitimate use
level: high
related high
Ngrok Usage with Remote Desktop Service
Detects cases in which ngrok, a reverse proxy tool, forwards events to the local RDP port, which could be a sign of malicious behaviour
status test author Florian Roth (Nextron Systems) id 64d51a51-32a6-49f0-9f3d-17e34d640272 license Sigma · DRL-1.1
view Sigma YAML
title: Ngrok Usage with Remote Desktop Service
id: 64d51a51-32a6-49f0-9f3d-17e34d640272
status: test
description: Detects cases in which ngrok, a reverse proxy tool, forwards events to the local RDP port, which could be a sign of malicious behaviour
references:
    - https://twitter.com/tekdefense/status/1519711183162556416?s=12&t=OTsHCBkQOTNs1k3USz65Zg
    - https://ngrok.com/
author: Florian Roth (Nextron Systems)
date: 2022-04-29
tags:
    - attack.command-and-control
    - attack.t1090
logsource:
    product: windows
    service: terminalservices-localsessionmanager
detection:
    selection:
        EventID: 21
        Address|contains: '16777216'
    condition: selection
falsepositives:
    - Unknown
level: high
related high
DNS Query Tor .Onion Address - Sysmon
Detects DNS queries to an ".onion" address related to Tor routing networks
status test author frack113 id b55ca2a3-7cff-4dda-8bdd-c7bfa63bf544 license Sigma · DRL-1.1
view Sigma YAML
title: DNS Query Tor .Onion Address - Sysmon
id: b55ca2a3-7cff-4dda-8bdd-c7bfa63bf544
related:
    - id: 8384bd26-bde6-4da9-8e5d-4174a7a47ca2
      type: similar
    - id: a8322756-015c-42e7-afb1-436e85ed3ff5
      type: similar
status: test
description: Detects DNS queries to an ".onion" address related to Tor routing networks
references:
    - https://www.logpoint.com/en/blog/detecting-tor-use-with-logpoint/
    - https://github.com/Azure/Azure-Sentinel/blob/f99542b94afe0ad2f19a82cc08262e7ac8e1428e/Detections/ASimDNS/imDNS_TorProxies.yaml
author: frack113
date: 2022-02-20
modified: 2025-09-12
tags:
    - attack.command-and-control
    - attack.t1090.003
logsource:
    product: windows
    category: dns_query
detection:
    selection:
        QueryName|endswith:
            - '.hiddenservice.net'
            - '.onion.ca'
            - '.onion.cab'
            - '.onion.casa'
            - '.onion.city'
            - '.onion.direct'
            - '.onion.dog'
            - '.onion.glass'
            - '.onion.gq'
            - '.onion.ink'
            - '.onion.it'
            - '.onion.link'
            - '.onion.lt'
            - '.onion.lu'
            - '.onion.nu'
            - '.onion.pet'
            - '.onion.plus'
            - '.onion.rip'
            - '.onion.sh'
            - '.onion.to'
            - '.onion.top'
            - '.onion'
            - '.s1.tor-gateways.de'
            - '.s2.tor-gateways.de'
            - '.s3.tor-gateways.de'
            - '.s4.tor-gateways.de'
            - '.s5.tor-gateways.de'
            - '.t2w.pw'
            - '.tor2web.ae.org'
            - '.tor2web.blutmagie.de'
            - '.tor2web.com'
            - '.tor2web.fi'
            - '.tor2web.io'
            - '.tor2web.org'
            - '.tor2web.xyz'
            - '.torlink.co'
    condition: selection
falsepositives:
    - Unknown
level: high
related high
Tor Client/Browser Execution
Detects the use of Tor or Tor-Browser to connect to onion routing networks
status test author frack113 id 62f7c9bf-9135-49b2-8aeb-1e54a6ecc13c license Sigma · DRL-1.1
view Sigma YAML
title: Tor Client/Browser Execution
id: 62f7c9bf-9135-49b2-8aeb-1e54a6ecc13c
status: test
description: Detects the use of Tor or Tor-Browser to connect to onion routing networks
references:
    - https://www.logpoint.com/en/blog/detecting-tor-use-with-logpoint/
author: frack113
date: 2022-02-20
modified: 2025-10-27
tags:
    - attack.command-and-control
    - attack.t1090.003
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        - Description: 'Tor Browser'
        - Product: 'Tor Browser'
        - Image|endswith:
              - '\tor.exe'
              - '\Tor Browser\Browser\firefox.exe'
    condition: selection
falsepositives:
    - Unknown
level: high
regression_tests_path: regression_data/rules/windows/process_creation/proc_creation_win_browsers_tor_execution/info.yml
related high
Query Tor Onion Address - DNS Client
Detects DNS resolution of an .onion address related to Tor routing networks
status test author Nasreddine Bencherchali (Nextron Systems) id 8384bd26-bde6-4da9-8e5d-4174a7a47ca2 license Sigma · DRL-1.1
view Sigma YAML
title: Query Tor Onion Address - DNS Client
id: 8384bd26-bde6-4da9-8e5d-4174a7a47ca2
related:
    - id: b55ca2a3-7cff-4dda-8bdd-c7bfa63bf544
      type: similar
    - id: a8322756-015c-42e7-afb1-436e85ed3ff5
      type: similar
status: test
description: Detects DNS resolution of an .onion address related to Tor routing networks
references:
    - https://www.logpoint.com/en/blog/detecting-tor-use-with-logpoint/
    - https://github.com/Azure/Azure-Sentinel/blob/f99542b94afe0ad2f19a82cc08262e7ac8e1428e/Detections/ASimDNS/imDNS_TorProxies.yaml
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-02-20
modified: 2025-09-12
tags:
    - attack.command-and-control
    - attack.t1090.003
logsource:
    product: windows
    service: dns-client
    definition: 'Requirements: Microsoft-Windows-DNS Client Events/Operational Event Log must be enabled/collected in order to receive the events.'
detection:
    selection:
        EventID: 3008
        QueryName|endswith:
            - '.hiddenservice.net'
            - '.onion.ca'
            - '.onion.cab'
            - '.onion.casa'
            - '.onion.city'
            - '.onion.direct'
            - '.onion.dog'
            - '.onion.glass'
            - '.onion.gq'
            - '.onion.guide'
            - '.onion.in.net'
            - '.onion.ink'
            - '.onion.it'
            - '.onion.link'
            - '.onion.lt'
            - '.onion.lu'
            - '.onion.ly'
            - '.onion.mn'
            - '.onion.network'
            - '.onion.nu'
            - '.onion.pet'
            - '.onion.plus'
            - '.onion.pt'
            - '.onion.pw'
            - '.onion.rip'
            - '.onion.sh'
            - '.onion.si'
            - '.onion.to'
            - '.onion.top'
            - '.onion.ws'
            - '.onion'
            - '.s1.tor-gateways.de'
            - '.s2.tor-gateways.de'
            - '.s3.tor-gateways.de'
            - '.s4.tor-gateways.de'
            - '.s5.tor-gateways.de'
            - '.t2w.pw'
            - '.tor2web.ae.org'
            - '.tor2web.blutmagie.de'
            - '.tor2web.com'
            - '.tor2web.fi'
            - '.tor2web.io'
            - '.tor2web.org'
            - '.tor2web.xyz'
            - '.torlink.co'
    condition: selection
falsepositives:
    - Unlikely
level: high
related high
AWS User Login Profile Was Modified
Detects activity when someone is changing passwords on behalf of other users. An attacker with the "iam:UpdateLoginProfile" permission on other users can change the password used to login to the AWS console on any user that already has a login profile setup.
status test author toffeebr33k id 055fb148-60f8-462d-ad16-26926ce050f1 license Sigma · DRL-1.1
view Sigma YAML
title: AWS User Login Profile Was Modified
id: 055fb148-60f8-462d-ad16-26926ce050f1
status: test
description: |
    Detects activity when someone is changing passwords on behalf of other users.
    An attacker with the "iam:UpdateLoginProfile" permission on other users can change the password used to login to the AWS console on any user that already has a login profile setup.
references:
    - https://github.com/RhinoSecurityLabs/AWS-IAM-Privilege-Escalation
author: toffeebr33k
date: 2021-08-09
modified: 2024-04-26
tags:
    - attack.persistence
    - attack.privilege-escalation
    - attack.t1098
logsource:
    product: aws
    service: cloudtrail
detection:
    selection:
        eventSource: 'iam.amazonaws.com'
        eventName: 'UpdateLoginProfile'
    filter_main_user_identity:
        userIdentity.arn|fieldref: requestParameters.userName
    condition: selection and not 1 of filter_main_*
falsepositives:
    - Legitimate user account administration
level: high
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