Detections

Explore public detection logic contributed by the community across SIEM and rule languages.

1,264 detections

Detects when a shell program such as the Windows command prompt or PowerShell is launched with system privileges from a uncommon parent location.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
001
Detects changes to environment variables related to ETW logging via the CommandLine.
This could indicate potential adversaries stopping ETW providers recording loaded .NET assemblies.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
001
Detects a suspicious process creation as SYSTEM user (suspicious program or command line parameter)
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
001
Detects use of WSReset.exe to bypass User Account Control (UAC). Adversaries use this technique to execute privileged processes.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
001
Detects changes to service startup type to 'disabled' or 'manual' using the WMIC command-line utility.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
001
Detects setting of a new registry value related to BgInfo configuration, which can be abused to execute custom VBScript via "BgInfo.exe"
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
001
Detects the addition of the 'MiniNt' key to the registry. Upon a reboot, Windows Event Log service will stop writing events.
Windows Event Log is a service that collects and stores event logs from the operating system and applications. It is an important component of Windows security and auditing.
Adversary may want to disable this service to disable logging of security events which could be used to detect their activities.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
001
Detects the installation of a Callout DLL via CalloutDlls and CalloutEnabled parameter in Registry, which can be used to execute code in context of the DHCP server (restart required)
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
001
Detects the installation of a DNS plugin DLL via ServerLevelPluginDll parameter in registry, which can be used to execute code in context of the DNS server (restart required)
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
001
Detects registry changes to Microsoft Office "VBAWarning" to a value of "1" which enables the execution of all macros, whether signed or unsigned.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
001
Detects changes to the "MaxMpxCt" registry value.
MaxMpxCt specifies the maximum outstanding network requests for the server per client, which is used when negotiating a Server Message Block (SMB) connection with a client. Note if the value is set beyond 125 older Windows 9x clients will fail to negotiate.
Ransomware threat actors and operators (specifically BlackCat) were seen increasing this value in order to handle a higher volume of traffic.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
001
Detects execution of Sysinternals tools via an AppX package.
Attackers could install the Sysinternals Suite to get access to tools such as psexec and procdump to avoid detection based on System paths.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
000
Detects application popup reporting a failure of the Sysmon service
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
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Detects the reporting of NTLMv1 being used between a client and server. NTLMv1 is insecure as the underlying encryption algorithms can be brute-forced by modern hardware.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
000
Detects denied requests by Active Directory Certificate Services.
Example of these requests denial include issues with permissions on the certificate template or invalid signatures.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
000
This rule detects a DHCP server in which a specified Callout DLL (in registry) was loaded
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
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Detects Obfuscated use of Clip.exe to execute PowerShell
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
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Detects all variations of obfuscated powershell IEX invocation code generated by Invoke-Obfuscation framework from the code block linked in the references
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
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Detects Obfuscated use of stdin to execute PowerShell
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
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Detects Obfuscated use of Environment Variables to execute PowerShell
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
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Detects Obfuscated Powershell via COMPRESS OBFUSCATION
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
000
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