Query: alert when Detect modification of TreatAs key to enable "rundll32.exe -sta" command
Matching passage: Sigma rule: Detect modification of TreatAs key to enable "rundll32.exe -sta" command. Logsource: windows / registry_set. Rule: title: COM Hijacking via TreatAs id: dc5c24af-6995-49b2-86eb-a9ff62199e82 status: test description: Detect modification of TreatAs key to enable "rundll32.exe -sta" command references: - https://github.com/redcanaryco/atomic-red-team/blob/40b77d63808dd4f4eafb83949805636735a1fd15/atomics/T1546.015/T1546.015.md - https://www.youtube.com/watch?v=3gz1QmiMhss&t=1251s author: frack113 date: 2022-08-28 modified: 2025-07-11 tags: - attack.privilege-escalation - attack.persistence - attack.t1546.015 logsource: category: registry_set product: windows detection: selection: TargetObject|endswith: TreatAs\(Default) filter_office: Image|startswith: C:\Program Files\Common Files\Microsoft Shared\ClickToRun\ Image|endswith: \OfficeClickToRun.exe filter_office2: Image: - C:\Program Files\Microsoft Office\root\integration\integrator.exe - C:\Program Files (x86)\Microsoft Office\root\integration\integrator.exe filter_svchost: Image: C:\Windows\system32\svchost.exe filter_misexec: Image: - C:\Windows\system32\msiexec.exe - C:\Windows\SysWOW64\msiexec.exe condition: selection and not 1 of filter_* falsepositives: - Legitimate use level: medium
Near-miss 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