SigmaHQ/rules/windows/process_access/sysmon_cmstp_execution.yml
2020-10-15 17:16:50 -03:00

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action: global
title: CMSTP Execution
id: 9d26fede-b526-4413-b069-6e24b6d07167
status: stable
description: Detects various indicators of Microsoft Connection Manager Profile Installer execution
tags:
- attack.defense_evasion
- attack.t1218.003
- attack.t1191 # an old one
- attack.execution
- attack.t1559.001
- attack.t1175 # an old one
- attack.g0069
- attack.g0080
- car.2019-04-001
author: Nik Seetharaman
date: 2018/07/16
modified: 2020/08/24
references:
- https://web.archive.org/web/20190720093911/http://www.endurant.io/cmstp/detecting-cmstp-enabled-code-execution-and-uac-bypass-with-sysmon/
fields:
- CommandLine
- ParentCommandLine
- Details
falsepositives:
- Legitimate CMSTP use (unlikely in modern enterprise environments)
level: high
---
logsource:
product: windows
category: registry_event
detection:
# Registry Object Add
selection2:
TargetObject|contains: '\cmmgr32.exe'
EventType: 'CreateKey'
# Registry Object Value Set
selection3:
TargetObject|contains: '\cmmgr32.exe'
# Process Access Call Trace
selection4:
CallTrace|contains: 'cmlua.dll'
condition: 1 of them
---
logsource:
category: process_creation
product: windows
detection:
# CMSTP Spawning Child Process
selection1:
ParentImage|endswith: '\cmstp.exe'
condition: 1 of them