Potential Invoke-Mimikatz PowerShell Script — Sigma Rule

Rule metadata and linked tags

Author: Tim Rauch, Elastic (idea). Source status: test; severity: high. Source dates: 2022-09-28 / not supplied.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 69247510cbdaf2b155e99cffd1d11c4a39d875e84c43c163a9f52cbcd34a1cda

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: Potential Invoke-Mimikatz PowerShell Script
id: 189e3b02-82b2-4b90-9662-411eb64486d4
status: test
description: Detects Invoke-Mimikatz PowerShell script and alike. Mimikatz is a credential dumper capable of obtaining plaintext Windows account logins and passwords.
references:
    - https://www.elastic.co/guide/en/security/current/potential-invoke-mimikatz-powershell-script.html#potential-invoke-mimikatz-powershell-script
author: Tim Rauch, Elastic (idea)
date: 2022-09-28
tags:
    - attack.credential-access
    - attack.t1003
logsource:
    category: ps_script
    product: windows
detection:
    selection_1:
        ScriptBlockText|contains|all:
            - 'DumpCreds'
            - 'DumpCerts'
    selection_2:
        ScriptBlockText|contains: 'sekurlsa::logonpasswords'
    selection_3:
        ScriptBlockText|contains|all:
            - 'crypto::certificates'
            - 'CERT_SYSTEM_STORE_LOCAL_MACHINE'
    condition: 1 of selection*
falsepositives:
    - Mimikatz can be useful for testing the security of networks
level: high

Original YAML and metadata in JSON

False positives

• Mimikatz can be useful for testing the security of networks

Source references

• https://www.elastic.co/guide/en/security/current/potential-invoke-mimikatz-powershell-script.html#potential-invoke-mimikatz-powershell-script