Detectionhightest
Invoke-Obfuscation VAR+ Launcher - PowerShell
Detects Obfuscated use of Environment Variables to execute PowerShell
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Jonathan Cheong, oscd.communityCreated Thu Oct 15Updated Fri Apr 050adfbc14-0ed1-11eb-adc1-0242ac120002windows
Log Source
WindowsPowerShell Script
ProductWindows← raw: windows
CategoryPowerShell Script← raw: ps_script
Definition
Requirements: Script Block Logging must be enabled
Detection Logic
Detection Logic1 selector
detection:
selection_4104:
ScriptBlockText|re: 'cmd.{0,5}(?:/c|/r)(?:\s|)"set\s[a-zA-Z]{3,6}.*(?:\{\d\}){1,}\\"\s+?-f(?:.*\)){1,}.*"'
condition: selection_4104False Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
References
MITRE ATT&CK
Techniques
Sub-techniques
Rule Metadata
Rule ID
0adfbc14-0ed1-11eb-adc1-0242ac120002
Status
test
Level
high
Type
Detection
Created
Thu Oct 15
Modified
Fri Apr 05
Author
Path
rules/windows/powershell/powershell_script/posh_ps_invoke_obfuscation_var.yml
Raw Tags
attack.defense-evasionattack.t1027attack.executionattack.t1059.001