Invoke-Obfuscation VAR+ Launcher

Title: Invoke-Obfuscation VAR+ Launcher
Status: test
Description:Detects Obfuscated use of Environment Variables to execute PowerShell
References:
  -https://github.com/SigmaHQ/sigma/issues/1009
Author: Jonathan Cheong, oscd.community
Date: 2020-10-15
modified:2024-04-15
Tags:

• -'attack.stealth'
• -'attack.t1027'
• -'attack.execution'
• -'attack.t1059.001'

Logsource:

• category: process_creation
• product: windows

Detection:
  selection:
    CommandLine|re: 'cmd.{0,5}(?:/c|/r)(?:\s|)\"set\s[a-zA-Z]{3,6}.*(?:\{\d\}){1,}\\\"\s+?\-f(?:.*\)){1,}.*\"'
  condition:selection
Falsepositives:
  -Unknown
Level: high