SigmaHQ/rules/windows/builtin/win_susp_psexec.yml

title: Suspicious PsExec execution
description: detects execution of psexec or paexec with renamed service name, this rule helps to filter out the noise if psexec is used for legit purposes or if attacker uses a different psexec client other than sysinternal one
author: Samir Bousseaden
references:
    - https://blog.menasec.net/2019/02/threat-hunting-3-detecting-psexec.html
tags:
    - attack.lateral_movement
    - attack.t1077
logsource:
    product: windows
    service: security
    description: 'The advanced audit policy setting "Object Access > Audit Detailed File Share" must be configured for Success/Failure'
detection:
    selection1:
        EventID: 5145
        ShareName: \\*\IPC$
        RelativeTargetName:
         - '*-stdin'
         - '*-stdout'
         - '*-stderr'
    selection2:
        EventID: 5145
        ShareName: \\*\IPC$
        RelativeTargetName: 'PSEXESVC*'
    condition: selection1 and not selection2
falsepositives: 
    - nothing observed so far
level: high