Detectioninformationaltest

PowerShell Decompress Commands

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

Convert In Phoenix Studio

Open this Sigma rule in the converter with the YAML preloaded and ready for backend selection.

Launch

Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research)Created Sat May 02Updated Sun Dec 251ddc1472-8e52-4f7d-9f11-eab14fc171f5windows

Log Source

WindowsPowerShell Module

ProductWindows← raw: windows

CategoryPowerShell Module← raw: ps_module

Definition

0ad03ef1-f21b-4a79-8ce8-e6900c54b65b

Detection Logic

detection:
    selection_4103:
        Payload|contains: 'Expand-Archive'
    condition: selection_4103

False Positives

Unknown

False positive likelihood has not been assessed. Additional context may be needed during triage.

References

MITRE ATT&CK

Tactics

TA0005 · Defense Evasion

Techniques

T1140 · Deobfuscate/Decode Files or Information

Related Rules

Derived

81fbdce6-ee49-485a-908d-1a728c5dcb09

Rule not found

Rule Metadata

Rule ID

1ddc1472-8e52-4f7d-9f11-eab14fc171f5

Status

test

Level

informational

Type

Detection

Created

Sat May 02

Modified

Sun Dec 25

Author

Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research)

Path

rules/windows/powershell/powershell_module/posh_pm_decompress_commands.yml

Raw Tags

attack.defense-evasionattack.t1140

View on GitHub