Possible PowerShell Decompress Commands (via ps_module)

This rule detects a General detection for specific decompress commands in PowerShell logs. This could be an adversary decompressing files.

SigmainformationalWindowsv1

sigma

possible-powershell-decompress-commands-via-ps-module

title: Possible PowerShell Decompress Commands (via ps_module)
id: ca1a90ce-8a81-5d1e-9af1-34e7adbe8890
status: stable
description: This rule detects a General detection for specific decompress commands in PowerShell logs. This could be an adversary decompressing files.
references:
    - https://attack.mitre.org/techniques/T1140/
    - https://github.com/OTRF/detection-hackathon-apt29/issues/8
    - https://github.com/OTRF/ThreatHunter-Playbook/blob/2d4257f630f4c9770f78d0c1df059f891ffc3fec/docs/evals/apt29/detections/4.A.3_09F29912-8E93-461E-9E89-3F06F6763383.md
author: Huntrule Team
date: 2026-06-08
tags:
    - attack.stealth
    - attack.t1140
logsource:
    product: windows
    category: ps_module
    definition: 0ad03ef1-f21b-4a79-8ce8-e6900c54b65b
detection:
    selection_4103:
        Payload|contains: 'Expand-Archive'
    condition: selection_4103
falsepositives:
    - Unknown
level: informational

Known false positives

Unknown

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.