Emerging Threathightest
Potential SNAKE Malware Persistence Service Execution
Detects a specific child/parent process relationship indicative of a "WerFault" process running from the "WinSxS" as a service. This could be indicative of potential SNAKE malware activity as reported by CISA.
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Launch
Emerging Threat
Active Threat
Developed to detect an active or emerging threat. Prioritize investigation of any alerts and correlate with threat intelligence.
Log Source
WindowsProcess Creation
ProductWindows← raw: windows
CategoryProcess Creation← raw: process_creation
Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.
Detection Logic
Detection Logic1 selector
detection:
selection:
ParentImage|endswith: '\services.exe'
Image|startswith: 'C:\Windows\WinSxS\'
Image|endswith: '\WerFault.exe'
condition: selectionFalse Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
References
MITRE ATT&CK
Tactics
Other
detection.emerging-threats
Rule Metadata
Rule ID
f7536642-4a08-4dd9-b6d5-c3286d8975ed
Status
test
Level
high
Type
Emerging Threat
Created
Thu May 04
Path
rules-emerging-threats/2023/Malware/SNAKE/proc_creation_win_malware_snake_service_execution.yml
Raw Tags
attack.executiondetection.emerging-threats