title: UAC Bypass Abusing Winsat Path Parsing - File
id: 155dbf56-e0a4-4dd0-8905-8a98705045e8
status: test
description: Detects the pattern of UAC Bypass using a path parsing issue in winsat.exe (UACMe 52)
references:
    - https://github.com/hfiref0x/UACME
author: Christian Burkard (Nextron Systems)
date: 2021-08-30
modified: 2022-10-09
tags:
    - attack.privilege-escalation
    - attack.t1548.002
logsource:
    category: file_event
    product: windows
detection:
    selection:
        TargetFilename|startswith: 'C:\Users\'
        TargetFilename|endswith:
            - '\AppData\Local\Temp\system32\winsat.exe'
            - '\AppData\Local\Temp\system32\winmm.dll'
    condition: selection
falsepositives:
    - Unknown
level: high

title: UAC Bypass Abusing Winsat Path Parsing - Process
id: 7a01183d-71a2-46ad-ad5c-acd989ac1793
status: test
description: Detects the pattern of UAC Bypass using a path parsing issue in winsat.exe (UACMe 52)
references:
    - https://github.com/hfiref0x/UACME
author: Christian Burkard (Nextron Systems)
date: 2021-08-30
modified: 2024-12-01
tags:
    - attack.privilege-escalation
    - attack.t1548.002
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        IntegrityLevel:
            - 'High'
            - 'System'
            - 'S-1-16-16384' # System
            - 'S-1-16-12288' # High
        ParentImage|endswith: '\AppData\Local\Temp\system32\winsat.exe'
        ParentCommandLine|contains: 'C:\Windows \system32\winsat.exe'
    condition: selection
falsepositives:
    - Unknown
level: high

title: Renamed Vmnat.exe Execution
id: 7b4f794b-590a-4ad4-ba18-7964a2832205
status: test
description: Detects renamed vmnat.exe or portable version that can be used for DLL side-loading
references:
    - https://twitter.com/malmoeb/status/1525901219247845376
author: elhoim
date: 2022-09-09
modified: 2023-02-03
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.execution
    - attack.stealth
    - attack.t1574.001
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        OriginalFileName: 'vmnat.exe'
    filter_rename:
        Image|endswith: 'vmnat.exe'
    condition: selection and not 1 of filter_*
falsepositives:
    - Unknown
level: high

title: HackTool - Hashcat Password Cracker Execution
id: 39b31e81-5f5f-4898-9c0e-2160cfc0f9bf
status: test
description: Execute Hashcat.exe with provided SAM file from registry of Windows and Password list to crack against
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1110.002/T1110.002.md#atomic-test-1---password-cracking-with-hashcat
    - https://hashcat.net/wiki/doku.php?id=hashcat
author: frack113
date: 2021-12-27
modified: 2023-02-04
tags:
    - attack.credential-access
    - attack.t1110.002
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        Image|endswith: '\hashcat.exe'
    selection_cli:
        CommandLine|contains|all:
            - '-a '
            - '-m 1000 '
            - '-r '
    condition: 1 of selection_*
falsepositives:
    - Tools that use similar command line flags and values
level: high

title: UAC Bypass Abusing Winsat Path Parsing - Registry
id: 6597be7b-ac61-4ac8-bef4-d3ec88174853
status: test
description: Detects the pattern of UAC Bypass using a path parsing issue in winsat.exe (UACMe 52)
references:
    - https://github.com/hfiref0x/UACME
author: Christian Burkard (Nextron Systems)
date: 2021-08-30
modified: 2023-08-17
tags:
    - attack.privilege-escalation
    - attack.t1548.002
logsource:
    category: registry_set
    product: windows
detection:
    selection:
        TargetObject|contains: '\Root\InventoryApplicationFile\winsat.exe|'
        TargetObject|endswith: '\LowerCaseLongPath'
        Details|startswith: 'c:\users\'
        Details|endswith: '\appdata\local\temp\system32\winsat.exe'
    condition: selection
falsepositives:
    - Unknown
level: high

title: Remote Task Creation via ATSVC Named Pipe - Zeek
id: dde85b37-40cd-4a94-b00c-0b8794f956b5
related:
    - id: f6de6525-4509-495a-8a82-1f8b0ed73a00
      type: derived
status: test
description: Detects remote task creation via at.exe or API interacting with ATSVC namedpipe
references:
    - https://web.archive.org/web/20230409194125/https://blog.menasec.net/2019/03/threat-hunting-25-scheduled-tasks-for.html
author: 'Samir Bousseaden, @neu5rn'
date: 2020-04-03
modified: 2022-12-27
tags:
    - attack.privilege-escalation
    - attack.execution
    - attack.lateral-movement
    - attack.persistence
    - car.2013-05-004
    - car.2015-04-001
    - attack.t1053.002
logsource:
    product: zeek
    service: smb_files
detection:
    selection:
        path: '\\\*\IPC$'
        name: 'atsvc'
        # Accesses: '*WriteData*'
    condition: selection
falsepositives:
    - Unknown
level: medium

title: Remote Task Creation via ATSVC Named Pipe
id: f6de6525-4509-495a-8a82-1f8b0ed73a00
status: test
description: Detects remote task creation via at.exe or API interacting with ATSVC namedpipe
references:
    - https://web.archive.org/web/20230409194125/https://blog.menasec.net/2019/03/threat-hunting-25-scheduled-tasks-for.html
author: Samir Bousseaden
date: 2019-04-03
modified: 2024-08-01
tags:
    - attack.privilege-escalation
    - attack.execution
    - attack.lateral-movement
    - attack.persistence
    - car.2013-05-004
    - car.2015-04-001
    - attack.t1053.002
logsource:
    product: windows
    service: security
    definition: 'The advanced audit policy setting "Object Access > Audit Detailed File Share" must be configured for Success/Failure'
detection:
    selection:
        EventID: 5145
        ShareName: '\\\\\*\\IPC$' # looking for the string \\*\IPC$
        RelativeTargetName: atsvc
        AccessList|contains: 'WriteData'
    condition: selection
falsepositives:
    - Unknown
level: medium