title: CMSTP Execution Process Access
id: 3b4b232a-af90-427c-a22f-30b0c0837b95
status: stable
description: Detects various indicators of Microsoft Connection Manager Profile Installer execution
references:
    - https://web.archive.org/web/20190720093911/http://www.endurant.io/cmstp/detecting-cmstp-enabled-code-execution-and-uac-bypass-with-sysmon/
author: Nik Seetharaman
date: 2018-07-16
modified: 2021-06-27
tags:
    - attack.stealth
    - attack.t1218.003
    - attack.execution
    - attack.t1559.001
    - attack.g0069
    - attack.g0080
    - car.2019-04-001
logsource:
    product: windows
    category: process_access
detection:
    # Process Access Call Trace
    selection:
        CallTrace|contains: 'cmlua.dll'
    condition: selection
falsepositives:
    - Legitimate CMSTP use (unlikely in modern enterprise environments)
level: high

title: DNS Query Request By Regsvr32.EXE
id: 36e037c4-c228-4866-b6a3-48eb292b9955
related:
    - id: c7e91a02-d771-4a6d-a700-42587e0b1095
      type: derived
status: test
description: Detects DNS queries initiated by "Regsvr32.exe"
references:
    - https://pentestlab.blog/2017/05/11/applocker-bypass-regsvr32/
    - https://oddvar.moe/2017/12/13/applocker-case-study-how-insecure-is-it-really-part-1/
author: Dmitriy Lifanov, oscd.community
date: 2019-10-25
modified: 2023-09-18
tags:
    - attack.execution
    - attack.stealth
    - attack.t1559.001
    - attack.t1218.010
logsource:
    category: dns_query
    product: windows
detection:
    selection:
        Image|endswith: '\regsvr32.exe'
    condition: selection
falsepositives:
    - Unknown
level: medium

title: Network Connection Initiated By Regsvr32.EXE
id: c7e91a02-d771-4a6d-a700-42587e0b1095
status: test
description: Detects a network connection initiated by "Regsvr32.exe"
references:
    - https://pentestlab.blog/2017/05/11/applocker-bypass-regsvr32/
    - https://oddvar.moe/2017/12/13/applocker-case-study-how-insecure-is-it-really-part-1/
author: Dmitriy Lifanov, oscd.community
date: 2019-10-25
modified: 2023-09-18
tags:
    - attack.execution
    - attack.stealth
    - attack.t1559.001
    - attack.t1218.010
logsource:
    category: network_connection
    product: windows
detection:
    selection:
        Initiated: 'true'
        Image|endswith: '\regsvr32.exe'
    condition: selection
falsepositives:
    - Unknown
level: medium