Sigma rule: Execution of Powershell Script in Public Folder

Rule

Title

Execution of Powershell Script in Public Folder

Status

test

Level

high

Author

Max Altgelt (Nextron Systems)

Date

2022-04-06

Modified

2022-07-14

File

rules/windows/process_creation/proc_creation_win_powershell_public_folder.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

This rule detects execution of PowerShell scripts located in the "C:\Users\Public" folder

Log source

product

windows

category

process_creation

Detection

selection:
    Image|endswith:
        - '\powershell.exe'
        - '\pwsh.exe'
    CommandLine|contains:
        - '-f C:\Users\Public'
        - '-f "C:\Users\Public'
        - '-f %Public%'
        - '-fi C:\Users\Public'
        - '-fi "C:\Users\Public'
        - '-fi %Public%'
        - '-fil C:\Users\Public'
        - '-fil "C:\Users\Public'
        - '-fil %Public%'
        - '-file C:\Users\Public'
        - '-file "C:\Users\Public'
        - '-file %Public%'
condition: selection

False positives (as the rule lists them)

• Unlikely

Tags

• attack.execution
• attack.t1059.001

MITRE ATT&CK ids this rule names

• T1059.001

References

• https://www.mandiant.com/resources/evolution-of-fin7

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/process_creation/proc_creation_win_powershell_public_folder.yml