Detection rules › Sigma
PowerShell Decompress Commands
A General detection for specific decompress commands in PowerShell logs. This could be an adversary decompressing files.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Stealth |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| PowerShell | Event ID 4103: Payload Context: ContextInfo User Data: UserData. |
Rule body
title: PowerShell Decompress Commands
id: 1ddc1472-8e52-4f7d-9f11-eab14fc171f5
related:
- id: 81fbdce6-ee49-485a-908d-1a728c5dcb09
type: derived
status: test
description: A General detection for specific decompress commands in PowerShell logs. This could be an adversary decompressing files.
references:
- 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: Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research)
date: 2020-05-02
modified: 2022-12-25
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
Stages and Predicates
Stage 0: condition
selection_4103Stage 1: selection_4103
selection_4103:
Payload|contains: 'Expand-Archive'
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
Payload | match |
| field:"Payload" kind:match value:"Expand-Archive" |