Query: detection rule: Detects changes to environment variables related to ETW logging via the CommandLine. This could indicate potential adver
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 the addition of a new "Allow" firewall rule by the WMI process (WmiPrvSE.EXE). This can occur if an attacker lev. Logsource: windows / firewall-as. Rule: title: New Firewall Rule Added In Windows Firewall Exception List Via WmiPrvSE.EXE id: eca81e8d-09e1-4d04-8614-c91f44fd0519 status: test description: 'Detects the addition of a new "Allow" firewall rule by the WMI process (WmiPrvSE.EXE). This can occur if an attacker leverages PowerShell cmdlets such as "New-NetFirewallRule", or directly uses WMI CIM classes such as "MSFT_NetFirewallRule". ' references: - https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1562.004/T1562.004.md#atomic-test-24---set-a-firewall-rule-using-new-netfirewallrule - https://malware.news/t/the-rhysida-ransomware-activity-analysis-and-ties-to-vice-society/72170 - https://cybersecuritynews.com/rhysida-ransomware-attacking-windows/ author: frack113, Nasreddine Bencherchali (Nextron Systems) date: 2024-05-10 tags: - attack.defense-impairment - attack.t1686.003 logsource: product: windows service: firewall-as detection: selection: EventID: - 2004 - 2071 - 2097 Action: 3 ModifyingApplication|endswith: :\Windows\System32\wbem\WmiPrvSE.exe condition: selection falsepositives: - Administrator scripts or activity. level: medium