Emerging Threathightest
SNAKE Malware WerFault Persistence File Creation
Detects the creation of a file named "WerFault.exe" in the WinSxS directory by a non-system process, which can be indicative of potential SNAKE malware activity
Convert In Phoenix Studio
Open this Sigma rule in the converter with the YAML preloaded and ready for backend selection.
Launch
Nasreddine Bencherchali (Nextron Systems)Created Wed May 10Updated Thu May 1864827580-e4c3-4c64-97eb-c72325d453992023
Emerging Threat
Active Threat
Developed to detect an active or emerging threat. Prioritize investigation of any alerts and correlate with threat intelligence.
Log Source
WindowsFile Event
ProductWindows← raw: windows
CategoryFile Event← raw: file_event
Events for file system activity including creation, modification, and deletion.
Detection Logic
Detection Logic2 selectors
detection:
selection:
TargetFilename|startswith: 'C:\Windows\WinSxS\'
TargetFilename|endswith: '\WerFault.exe'
filter_main_system_location:
Image|startswith:
- 'C:\Windows\System32\'
- 'C:\Windows\SysWOW64\'
- 'C:\Windows\WinSxS\'
condition: selection and not 1 of filter_main_*False 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
64827580-e4c3-4c64-97eb-c72325d45399
Status
test
Level
high
Type
Emerging Threat
Created
Wed May 10
Modified
Thu May 18
Path
rules-emerging-threats/2023/Malware/SNAKE/file_event_win_malware_snake_werfault_creation.yml
Raw Tags
attack.executiondetection.emerging-threats