Sigma rule: ETW Logging Disabled In .NET Processes - Sysmon Registry

Rule

Title

ETW Logging Disabled In .NET Processes - Sysmon Registry

Status

test

Level

high

Author

Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research)

Date

2020-06-05

Modified

2023-08-17

File

rules/windows/registry/registry_set/registry_set_dot_net_etw_tamper.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Potential adversaries stopping ETW providers recording loaded .NET assemblies.

Log source

product

windows

category

registry_set

Detection

selection_etw_enabled:
    TargetObject|endswith: 'SOFTWARE\Microsoft\.NETFramework\ETWEnabled'
    Details: 'DWORD (0x00000000)'
selection_complus:
    TargetObject|endswith:
        - '\COMPlus_ETWEnabled'
        - '\COMPlus_ETWFlags'
    Details:
        - 0 # For REG_SZ type
        - 'DWORD (0x00000000)'
condition: 1 of selection_*

False positives (as the rule lists them)

• Unknown

Tags

• attack.persistence
• attack.defense-impairment
• attack.t1112
• attack.t1685

MITRE ATT&CK ids this rule names

• T1112
• T1685

Related rules

• a4c90ea1-2634-4ca0-adbb-35eae169b6fc (similar)

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://blog.xpnsec.com/hiding-your-dotnet-complus-etwenabled/
• 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/registry/registry_set/registry_set_dot_net_etw_tamper.yml