{"id":"bf4fc428-dcc3-4bbd-99fe-2422aeee2544","title":"ETW Logging Disabled In .NET Processes - Sysmon Registry","description":"Potential adversaries stopping ETW providers recording loaded .NET assemblies.","author":"Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research)","status":"test","level":"high","date":"2020-06-05","modified":"2023-08-17","tags":["attack.persistence","attack.defense-impairment","attack.t1112","attack.t1685"],"technique_ids":["T1112","T1685"],"logsource":{"product":"windows","category":"registry_set"},"falsepositives":["Unknown"],"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"],"source_path":"rules/windows/registry/registry_set/registry_set_dot_net_etw_tamper.yml","source_sha256":"668dd2f5c0898988c9296b0cdcd42c9cb3195ebf2f1dc3b3e1d1031a99e1ef5d","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/registry/registry_set/registry_set_dot_net_etw_tamper.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: ETW Logging Disabled In .NET Processes - Sysmon Registry\nid: bf4fc428-dcc3-4bbd-99fe-2422aeee2544\nrelated:\n    - id: a4c90ea1-2634-4ca0-adbb-35eae169b6fc\n      type: similar\nstatus: test\ndescription: Potential adversaries stopping ETW providers recording loaded .NET assemblies.\nreferences:\n    - https://twitter.com/_xpn_/status/1268712093928378368\n    - https://social.msdn.microsoft.com/Forums/vstudio/en-US/0878832e-39d7-4eaf-8e16-a729c4c40975/what-can-i-use-e13c0d23ccbc4e12931bd9cc2eee27e4-for?forum=clr\n    - https://github.com/dotnet/runtime/blob/ee2355c801d892f2894b0f7b14a20e6cc50e0e54/docs/design/coreclr/jit/viewing-jit-dumps.md#setting-configuration-variables\n    - https://github.com/dotnet/runtime/blob/f62e93416a1799aecc6b0947adad55a0d9870732/src/coreclr/src/inc/clrconfigvalues.h#L35-L38\n    - https://github.com/dotnet/runtime/blob/7abe42dc1123722ed385218268bb9fe04556e3d3/src/coreclr/src/inc/clrconfig.h#L33-L39\n    - https://github.com/dotnet/runtime/search?p=1&q=COMPlus_&unscoped_q=COMPlus_\n    - https://bunnyinside.com/?term=f71e8cb9c76a\n    - http://managed670.rssing.com/chan-5590147/all_p1.html\n    - https://github.com/dotnet/runtime/blob/4f9ae42d861fcb4be2fcd5d3d55d5f227d30e723/docs/coding-guidelines/clr-jit-coding-conventions.md#1412-disabling-code\n    - https://blog.xpnsec.com/hiding-your-dotnet-complus-etwenabled/\n    - https://i.blackhat.com/EU-21/Wednesday/EU-21-Teodorescu-Veni-No-Vidi-No-Vici-Attacks-On-ETW-Blind-EDRs.pdf\nauthor: Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research)\ndate: 2020-06-05\nmodified: 2023-08-17\ntags:\n    - attack.persistence\n    - attack.defense-impairment\n    - attack.t1112\n    - attack.t1685\nlogsource:\n    product: windows\n    category: registry_set\ndetection:\n    selection_etw_enabled:\n        TargetObject|endswith: 'SOFTWARE\\Microsoft\\.NETFramework\\ETWEnabled'\n        Details: 'DWORD (0x00000000)'\n    selection_complus:\n        TargetObject|endswith:\n            - '\\COMPlus_ETWEnabled'\n            - '\\COMPlus_ETWFlags'\n        Details:\n            - 0 # For REG_SZ type\n            - 'DWORD (0x00000000)'\n    condition: 1 of selection_*\nfalsepositives:\n    - Unknown\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1112","id":"T1112","name":"Modify Registry","page":"techniques/enterprise/T1112/"},{"key":"enterprise/T1685","id":"T1685","name":"Disable or Modify Tools","page":"techniques/enterprise/T1685/"}],"data_path":"data/detection-rules/bf4fc428-dcc3-4bbd-99fe-2422aeee2544.json","kind":"sigma"}