Impacket PsExec Execution — Sigma Rule

Rule metadata and linked tags

Author: Bhabesh Raj. Source status: test; severity: high. Source dates: 2020-12-14 / 2022-09-22.

{
  "product": "windows",
  "service": "security",
  "definition": "The advanced audit policy setting \"Object Access > Audit Detailed File Share\" must be configured for Success/Failure"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: dd46738adfa5d8ad19e18501f74dda52105437b698d5fa5d7c5b92e49b37ee2f

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: Impacket PsExec Execution
id: 32d56ea1-417f-44ff-822b-882873f5f43b
status: test
description: Detects execution of Impacket's psexec.py.
references:
    - https://web.archive.org/web/20230329171218/https://blog.menasec.net/2019/02/threat-hunting-3-detecting-psexec.html
author: Bhabesh Raj
date: 2020-12-14
modified: 2022-09-22
tags:
    - attack.lateral-movement
    - attack.t1021.002
logsource:
    product: windows
    service: security
    definition: 'The advanced audit policy setting "Object Access > Audit Detailed File Share" must be configured for Success/Failure'
detection:
    selection1:
        EventID: 5145
        ShareName: '\\\\\*\\IPC$' # looking for the string \\*\IPC$
        RelativeTargetName|contains:
            - 'RemCom_stdin'
            - 'RemCom_stdout'
            - 'RemCom_stderr'
    condition: selection1
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://web.archive.org/web/20230329171218/https://blog.menasec.net/2019/02/threat-hunting-3-detecting-psexec.html