Extracting Information with PowerShell — Sigma Rule

Rule metadata and linked tags

Author: frack113. Source status: test; severity: medium. Source dates: 2021-12-19 / 2022-12-25.

{
  "product": "windows",
  "category": "ps_script",
  "definition": "Requirements: Script Block Logging must be enabled"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 1cf114f53e9e05c4203559cff5250a70923b9821547e34d27d2f8602e7e56600

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: Extracting Information with PowerShell
id: bd5971a7-626d-46ab-8176-ed643f694f68
status: test
description: |
    Adversaries may search local file systems and remote file shares for files containing insecurely stored credentials.
    These can be files created by users to store their own credentials, shared credential stores for a group of individuals,
    configuration files containing passwords for a system or service, or source code/binary files containing embedded passwords.
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1552.001/T1552.001.md
author: frack113
date: 2021-12-19
modified: 2022-12-25
tags:
    - attack.credential-access
    - attack.t1552.001
logsource:
    product: windows
    category: ps_script
    definition: 'Requirements: Script Block Logging must be enabled'
detection:
    selection:
        ScriptBlockText|contains|all:
            - ls
            - ' -R'
            - 'select-string '
            - '-Pattern '
    condition: selection
falsepositives:
    - Unknown
level: medium

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1552.001/T1552.001.md