Sigma rule: Powershell Directory Enumeration

Rule

Title

Powershell Directory Enumeration

Status

test

Level

medium

Author

frack113

Date

2022-03-17

File

rules/windows/powershell/powershell_script/posh_ps_susp_directory_enum.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects technique used by MAZE ransomware to enumerate directories using Powershell

Log source

product

windows

category

ps_script

definition

Requirements: Script Block Logging must be enabled

Detection

selection:
    ScriptBlockText|contains|all:
        - foreach
        - Get-ChildItem
        - '-Path '
        - '-ErrorAction '
        - SilentlyContinue
        - 'Out-File '
        - '-append'
condition: selection

False positives (as the rule lists them)

• Legitimate PowerShell scripts

Tags

• attack.discovery
• attack.t1083

MITRE ATT&CK ids this rule names

• T1083

References

• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1083/T1083.md
• https://www.mandiant.com/resources/tactics-techniques-procedures-associated-with-maze-ransomware-incidents

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/powershell/powershell_script/posh_ps_susp_directory_enum.yml