title: PowerShell Decompress Commands
author: Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research)
date: 2020/05/02
description: A General detection for specific decompress commands in PowerShell logs.
  This could be an adversary decompressing files.
detection:
  SELECTION_1:
    Payload: '*Expand-Archive*'
  condition: SELECTION_1
falsepositives:
- unknown
id: 1ddc1472-8e52-4f7d-9f11-eab14fc171f5
level: informational
logsource:
  category: ps_module
  definition: PowerShell Module Logging must be enabled
  product: windows
modified: 2021/10/16
references:
- https://github.com/OTRF/detection-hackathon-apt29/issues/8
- https://threathunterplaybook.com/evals/apt29/detections/4.A.3_09F29912-8E93-461E-9E89-3F06F6763383.html
related:
- id: 81fbdce6-ee49-485a-908d-1a728c5dcb09
  type: derived
status: experimental
tags:
- attack.defense_evasion
- attack.t1140
ruletype: SIGMA