Sigma rule: Potential ReflectDebugger Content Execution Via WerFault.EXE

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-428cb1a522dc, updated 2023-06-30T00:00:00.000Z.

Rule

Title
Potential ReflectDebugger Content Execution Via WerFault.EXE
Status
test
Level
medium
Author
X__Junior (Nextron Systems)
Date
2023-06-30
File
rules/windows/process_creation/proc_creation_win_werfault_reflect_debugger_exec.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

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

Log source

product
windows
category
process_creation

Detection

selection_img:
    - Image|endswith: '\WerFault.exe'
    - OriginalFileName: 'WerFault.exe'
selection_cli:
    CommandLine|contains: ' -pr '
condition: all of selection_*

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.execution
  • attack.stealth
  • attack.t1036

MITRE ATT&CK ids this rule names

Related rules

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_werfault_reflect_debugger_exec.yml

Sources and licences

  • SigmaHQ

    "Potential ReflectDebugger Content Execution Via WerFault.EXE" by X__Junior (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_werfault_reflect_debugger_exec.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: Potential ReflectDebugger Content Execution Via WerFault.EXE",
entity page, dataset version ref-428cb1a522dc, updated 2023-06-30T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/fabfb3a7-3ce1-4445-9c7c-3c27f1051cdd (accessed 2026-11-03).
Underlying source: SigmaHQ rule fabfb3a7-3ce1-4445-9c7c-3c27f1051cdd, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.