Detections

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

503 detections

Detects registry changes to Microsoft Office "AccessVBOM" to a value of "1" which disables trust access for VBA on the victim machine and lets attackers execute malicious macros without any Microsoft Office warnings.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
003
Detects changes to the registry value "PythonFunctionWarnings" that would prevent any warnings or alerts from showing when Python functions are about to be executed.
Threat actors could run malicious code through the new Microsoft Excel feature that allows Python to run within the spreadsheet.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
003
Detects changes to the "TracingDisabled" key in order to disable ETW logging for services.exe (SCM)
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
003
Detects when a user bypasses the push protection on a secret detected by secret scanning.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
002
Detects successful deletion or disabling of an AWS GuardDuty detector, possibly by an attacker trying to avoid detection of its malicious activities.
Upon deletion, GuardDuty stops monitoring the environment and all existing findings are lost.
Verify with the user identity that this activity is legitimate.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
102
Detects updates of the GuardDuty list of trusted IPs, perhaps to disable security alerts against malicious IPs.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
002
Detects the modification of the findings on SecurityHub.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
002
Monitor and alert on group membership additions of groups that have CA policy modification access
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
002
Detects the use of the `syslog` syscall with action code 5 (SYSLOG_ACTION_CLEAR),
(4 is SYSLOG_ACTION_READ_CLEAR and 6 is SYSLOG_ACTION_CONSOLE_OFF) which clears the kernel
ring buffer (dmesg logs). This can be used by attackers to hide traces after exploitation
or privilege escalation. A common technique is running `dmesg -c`, which triggers this syscall internally.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
002
Detects the usage of utilities such as 'systemctl', 'service'...etc to stop or disable tools and services on Linux systems.
Attackers may stop or disable security tools and services to evade detection, maintain persistence, or disrupt system operations.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
002
Detects deletion of local audit logs
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
002
This rule detects a suspicious crash of the Microsoft Malware Protection Engine
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
002
Detects the addition of a new module to an IIS server.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
002
Detects the removal of a previously installed IIS module.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
002
One of the Windows Eventlogs has been cleared. e.g. caused by "wevtutil cl" command execution
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
002
Detects execution of EDRSilencer, a tool that abuses the Windows Filtering Platform (WFP) to block the outbound traffic of running EDR agents based on specific hardcoded filter names.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
002
Detects modifications to the Windows Defender exclusion registry key. This could indicate a potentially suspicious or even malicious activity by an attacker trying to add a new exclusion in order to bypass security.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
002
One of the Windows Eventlogs has been cleared. e.g. caused by "wevtutil cl" command execution
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
002
Detects the clearing of one of the Windows Core Eventlogs. e.g. caused by "wevtutil cl" command execution
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
002
Detects when someone is adding or removing applications or folders from exploit guard "ProtectedFolders" or "AllowedApplications"
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
002
Detects disabling of the Windows Defender feature of scanning for malware and other potentially unwanted software
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
6 months ago
002
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