HackTool - CrackMapExec Process Patterns — Sigma Rule

Rule metadata and linked tags

Author: Florian Roth (Nextron Systems). Source status: test; severity: high. Source dates: 2022-03-12 / 2023-02-13.

{
  "product": "windows",
  "category": "process_creation"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: fcdd8f20efd40a8c93334ed32b9e18f6d5b17278d0ccddfc56cac7e8e607073e

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: HackTool - CrackMapExec Process Patterns
id: f26307d8-14cd-47e3-a26b-4b4769f24af6
status: test
description: Detects suspicious process patterns found in logs when CrackMapExec is used
references:
    - https://mpgn.gitbook.io/crackmapexec/smb-protocol/obtaining-credentials/dump-lsass
author: Florian Roth (Nextron Systems)
date: 2022-03-12
modified: 2023-02-13
tags:
    - attack.credential-access
    - attack.t1003.001
logsource:
    product: windows
    category: process_creation
detection:
    selection_lsass_dump1:
        CommandLine|contains|all:
            - 'tasklist /fi '
            - 'Imagename eq lsass.exe'
        CommandLine|contains:
            - 'cmd.exe /c '
            - 'cmd.exe /r '
            - 'cmd.exe /k '
            - 'cmd /c '
            - 'cmd /r '
            - 'cmd /k '
        User|contains: # covers many language settings
            - 'AUTHORI'
            - 'AUTORI'
    selection_lsass_dump2:
        CommandLine|contains|all:
            - 'do rundll32.exe C:\windows\System32\comsvcs.dll, MiniDump'
            - '\Windows\Temp\'
            - ' full'
            - '%%B'
    selection_procdump:
        CommandLine|contains|all:
            - 'tasklist /v /fo csv'
            - 'findstr /i "lsass"'
    condition: 1 of selection*
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://mpgn.gitbook.io/crackmapexec/smb-protocol/obtaining-credentials/dump-lsass