Sigma rule: ETW Logging Tamper In .NET Processes Via CommandLine
A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-79980d765cf4, updated 2022-12-09T00:00:00.000Z.
Rule
- Title
- ETW Logging Tamper In .NET Processes Via CommandLine
- Status
- test
- Level
- high
- Author
- Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research)
- Date
- 2020-05-02
- Modified
- 2022-12-09
- File
- rules/windows/process_creation/proc_creation_win_susp_etw_modification_cmdline.yml
- Commit
- ccbb0369507f796db0b0ae6854c8a2be471b9d84
Detects changes to environment variables related to ETW logging via the CommandLine.
This could indicate potential adversaries stopping ETW providers recording loaded .NET assemblies.
Log source
- product
- windows
- category
- process_creation
Detection
selection:
CommandLine|contains:
- 'COMPlus_ETWEnabled'
- 'COMPlus_ETWFlags'
condition: selectionFalse positives (as the rule lists them)
- Unlikely
Tags
- attack.defense-impairment
- attack.t1685
MITRE ATT&CK ids this rule names
References
- https://twitter.com/_xpn_/status/1268712093928378368
- https://social.msdn.microsoft.com/Forums/vstudio/en-US/0878832e-39d7-4eaf-8e16-a729c4c40975/what-can-i-use-e13c0d23ccbc4e12931bd9cc2eee27e4-for?forum=clr
- https://github.com/dotnet/runtime/blob/ee2355c801d892f2894b0f7b14a20e6cc50e0e54/docs/design/coreclr/jit/viewing-jit-dumps.md#setting-configuration-variables
- https://github.com/dotnet/runtime/blob/f62e93416a1799aecc6b0947adad55a0d9870732/src/coreclr/src/inc/clrconfigvalues.h#L35-L38
- https://github.com/dotnet/runtime/blob/7abe42dc1123722ed385218268bb9fe04556e3d3/src/coreclr/src/inc/clrconfig.h#L33-L39
- https://github.com/dotnet/runtime/search?p=1&q=COMPlus_&unscoped_q=COMPlus_
- https://bunnyinside.com/?term=f71e8cb9c76a
- http://managed670.rssing.com/chan-5590147/all_p1.html
- https://github.com/dotnet/runtime/blob/4f9ae42d861fcb4be2fcd5d3d55d5f227d30e723/docs/coding-guidelines/clr-jit-coding-conventions.md#1412-disabling-code
- https://i.blackhat.com/EU-21/Wednesday/EU-21-Teodorescu-Veni-No-Vidi-No-Vici-Attacks-On-ETW-Blind-EDRs.pdf
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_susp_etw_modification_cmdline.yml
Sources and licences
SigmaHQ
"ETW Logging Tamper In .NET Processes Via CommandLine" by Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_susp_etw_modification_cmdline.yml.
Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License
Cite this page
Dragons Eye Ransomware Tracker, "Sigma rule: ETW Logging Tamper In .NET Processes Via CommandLine",
entity page, dataset version ref-79980d765cf4, updated 2022-12-09T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/41421f44-58f9-455d-838a-c398859841d4 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 41421f44-58f9-455d-838a-c398859841d4, 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.