Sigma rule: Suspicious Get-Variable.exe Creation

Rule

Title

Suspicious Get-Variable.exe Creation

Status

test

Level

high

Author

frack113

Date

2022-04-23

File

rules/windows/file/file_event/file_event_win_susp_get_variable.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Get-Variable is a valid PowerShell cmdlet
WindowsApps is by default in the path where PowerShell is executed.
So when the Get-Variable command is issued on PowerShell execution, the system first looks for the Get-Variable executable in the path and executes the malicious binary instead of looking for the PowerShell cmdlet.

Log source

product

windows

category

file_event

Detection

selection:
    TargetFilename|endswith: 'Local\Microsoft\WindowsApps\Get-Variable.exe'
condition: selection

False positives (as the rule lists them)

• Unknown

Tags

• attack.privilege-escalation
• attack.persistence
• attack.stealth
• attack.t1546
• attack.t1027

MITRE ATT&CK ids this rule names

• T1027
• T1546

References

• https://blog.malwarebytes.com/threat-intelligence/2022/04/colibri-loader-combines-task-scheduler-and-powershell-in-clever-persistence-technique/
• https://www.joesandbox.com/analysis/465533/0/html

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/file/file_event/file_event_win_susp_get_variable.yml