Query: alert when Potential adversaries stopping ETW providers recording loaded .NET assemblies.
Matching passage: Sigma rule: Potential adversaries stopping ETW providers recording loaded .NET assemblies.. Logsource: windows / registry_set. Rule: title: ETW Logging Disabled In .NET Processes - Sysmon Registry id: bf4fc428-dcc3-4bbd-99fe-2422aeee2544 related: - id: a4c90ea1-2634-4ca0-adbb-35eae169b6fc type: similar status: test description: 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://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 author: Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research) date: 2020-06-05 modified: 2023-08-17 tags: - attack.persistence - attack.defense-impairment - attack.t1112 - attack.t1685 logsource: 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 - DWORD (0x00000000) condition: 1 of selection_* falsepositives: - Unknown level: high
Near-miss passage: Sigma rule: Detects the execution of a script event consumer. When scrcons.exe launches, it does so in response to the creation of a. Logsource: windows / process_creation. Rule: title: WMI Persistence - Script Event Consumer id: ec1d5e28-8f3b-4188-a6f8-6e8df81dc28e status: test description: 'Detects the execution of a script event consumer. When scrcons.exe launches, it does so in response to the creation of an ActiveScriptEventConsumer instance and will execute registered JScript or VBScript code as a result. Script event consumers are a built-in Windows Management Instrumentation (WMI) class that automatically executes a predefined script (in VBScript or JScript) whenever a specific system event occurs. Adversaries often abuse script event consumers to maintain persistence on a compromised host by executing a malicious script whenever a specific event occurs. ' references: - https://redcanary.com/blog/threat-detection/child-processes/ - https://www.eideon.com/2018-03-02-THL03-WMIBackdoors/ author: Thomas Patzke date: 2018-03-07 modified: 2022-10-11 tags: - attack.persistence - attack.privilege-escalation - attack.t1546.003 logsource: category: process_creation product: windows detection: selection: Image: C:\WINDOWS\system32\wbem\scrcons.exe ParentImage: C:\Windows\System32\svchost.exe condition: selection falsepositives: - Legitimate event consumers - Dell computers on some versions register an event consumer that is known to cause false positives when brightness is changed by the corresponding keyboard button level: medium