Query: detect Detects changes to environment variables related to ETW logging via the CommandLine. This could indicate potential adver in logs
Matching passage: Sigma rule: Detects changes to environment variables related to ETW logging via the CommandLine. This could indicate potential adver. Logsource: windows / process_creation. Rule: title: ETW Logging Tamper In .NET Processes Via CommandLine id: 41421f44-58f9-455d-838a-c398859841d4 status: test description: 'Detects changes to environment variables related to ETW logging via the CommandLine. This could indicate potential adversaries stopping ETW providers recording loaded .NET assemblies. ' 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 author: Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research) date: 2020-05-02 modified: 2022-12-09 tags: - attack.defense-impairment - attack.t1685 logsource: category: process_creation product: windows detection: selection: CommandLine|contains: - COMPlus_ETWEnabled - COMPlus_ETWFlags condition: selection falsepositives: - Unlikely level: high
Near-miss passage: Sigma rule: Detects .NET CLR DLLs being loaded by scripting applications such as wscript or cscript. This could be an indication of. Logsource: windows / image_load. Rule: title: DotNet CLR DLL Loaded By Scripting Applications id: 4508a70e-97ef-4300-b62b-ff27992990ea status: test description: Detects .NET CLR DLLs being loaded by scripting applications such as wscript or cscript. This could be an indication of potential suspicious execution. references: - https://github.com/tyranid/DotNetToJScript - https://thewover.github.io/Introducing-Donut/ - https://web.archive.org/web/20230329154538/https://blog.menasec.net/2019/07/interesting-difr-traces-of-net-clr.html - https://web.archive.org/web/20221026202428/https://gist.github.com/code-scrap/d7f152ffcdb3e0b02f7f394f5187f008 author: omkar72, oscd.community date: 2020-10-14 modified: 2023-02-23 tags: - attack.execution - attack.privilege-escalation - attack.stealth - attack.t1055 logsource: category: image_load product: windows detection: selection: Image|endswith: - \cmstp.exe - \cscript.exe - \mshta.exe - \msxsl.exe - \regsvr32.exe - \wmic.exe - \wscript.exe ImageLoaded|endswith: - \clr.dll - \mscoree.dll - \mscorlib.dll condition: selection falsepositives: - Unknown level: high