Detectionmediumtest
Potential ReflectDebugger Content Execution Via WerFault.EXE
Detects execution of "WerFault.exe" with the "-pr" commandline flag that is used to run files stored in the ReflectDebugger key which could be used to store the path to the malware in order to masquerade the execution flow
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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 Logic2 selectors
detection:
selection_img:
- Image|endswith: '\WerFault.exe'
- OriginalFileName: 'WerFault.exe'
selection_cli:
CommandLine|contains: ' -pr '
condition: all of selection_*False Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
MITRE ATT&CK
Techniques
Rule Metadata
Rule ID
fabfb3a7-3ce1-4445-9c7c-3c27f1051cdd
Status
test
Level
medium
Type
Detection
Created
Fri Jun 30
Path
rules/windows/process_creation/proc_creation_win_werfault_reflect_debugger_exec.yml
Raw Tags
attack.executionattack.defense-evasionattack.t1036