SigmaHQ Detections
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Detects programs that connect to known malware callback ports based on threat intelligence reports.
Detects failed attempts to clear Windows event logs via the WMI NTEventLogFile ClearEventLog method.
Event 5858 in the WMI-Activity operational log is an error event, meaning it is only generated
when the WMI operation encounters an error (e.g. access denied, provider failure).
It could be an indication of an attacker attempting to clear event logs via WMI, but failing due to insufficient privileges or other issues.
Successful clearing operations will NOT produce this event; for those, correlate with
Security event 1102 or System event 104.
Event 5858 in the WMI-Activity operational log is an error event, meaning it is only generated
when the WMI operation encounters an error (e.g. access denied, provider failure).
It could be an indication of an attacker attempting to clear event logs via WMI, but failing due to insufficient privileges or other issues.
Successful clearing operations will NOT produce this event; for those, correlate with
Security event 1102 or System event 104.
Detects a Microsoft Office application loading taskschd.dll, which exposes COM interfaces for managing Windows Scheduled Tasks.
This load is an early precursor to scheduled task creation or modification and has been frequently observed in macro-enabled
malicious documents attempting to establish persistence.
This load is an early precursor to scheduled task creation or modification and has been frequently observed in macro-enabled
malicious documents attempting to establish persistence.
Detects a script interpreter process (like node.js or bun) spawning a known credential scanning tool (e.g., trufflehog, gitleaks).
This behavior is indicative of an attempt to find and steal secrets, as seen in the "Shai-Hulud: The Second Coming" campaign.
This behavior is indicative of an attempt to find and steal secrets, as seen in the "Shai-Hulud: The Second Coming" campaign.
Detects the use of curl with NTLM authentication and empty credentials (-u :), which can be abused to leak the currently logged-in user's NTLMv2 challenge-response to an
attacker-controlled server, enabling offline cracking or relay attacks.
When no credentials are provided, the Microsoft-shipped curl passes a NULL identity to Windows SSPI, which automatically falls back to the current user's logon session credentials
stored in LSASS — without requiring a plaintext password.
This behavior is exclusive to the curl binary shipped by Microsoft (available since Windows 10 / Windows Server 2019), which is built with SSPI support.
attacker-controlled server, enabling offline cracking or relay attacks.
When no credentials are provided, the Microsoft-shipped curl passes a NULL identity to Windows SSPI, which automatically falls back to the current user's logon session credentials
stored in LSASS — without requiring a plaintext password.
This behavior is exclusive to the curl binary shipped by Microsoft (available since Windows 10 / Windows Server 2019), which is built with SSPI support.
Detects execution of Advanced Installer MSIX Package Support Framework (PSF) components, specifically AI_STUBS executables with original filename 'popupwrapper.exe'.
This activity may indicate malicious MSIX packages build with Advanced Installer leveraging the Package Support Framework to bypass application control restrictions.
This activity may indicate malicious MSIX packages build with Advanced Installer leveraging the Package Support Framework to bypass application control restrictions.
Detects DNS queries containing patterns associated with Kerberos coercion attacks via DNS object spoofing.
The pattern "1UWhRCAAAAA..BAAAA" is a base64-encoded signature that corresponds to a marshaled CREDENTIAL_TARGET_INFORMATION structure.
Attackers can use this technique to coerce authentication from victim systems to attacker-controlled hosts.
It is one of the strong indicators of a Kerberos coercion attack, where adversaries manipulate DNS records
to spoof Service Principal Names (SPNs) and redirect authentication requests like CVE-2025-33073.
The pattern "1UWhRCAAAAA..BAAAA" is a base64-encoded signature that corresponds to a marshaled CREDENTIAL_TARGET_INFORMATION structure.
Attackers can use this technique to coerce authentication from victim systems to attacker-controlled hosts.
It is one of the strong indicators of a Kerberos coercion attack, where adversaries manipulate DNS records
to spoof Service Principal Names (SPNs) and redirect authentication requests like CVE-2025-33073.
Detects commandline keywords indicative of potential usge of the tool WinPwn. A tool for Windows and Active Directory reconnaissance and exploitation.
Detects the presence of "UWhRC....AAYBAAAA" pattern in command line.
The pattern "1UWhRCAAAAA..BAAAA" is a base64-encoded signature that corresponds to a marshaled CREDENTIAL_TARGET_INFORMATION structure.
Attackers can use this technique to coerce authentication from victim systems to attacker-controlled hosts.
It is one of the strong indicators of a Kerberos coercion attack, where adversaries manipulate DNS records
to spoof Service Principal Names (SPNs) and redirect authentication requests like in CVE-2025-33073.
If you see this pattern in the command line, it is likely an attempt to add spoofed Service Principal Names (SPNs) to DNS records,
or checking for the presence of such records through the `nslookup` command.
The pattern "1UWhRCAAAAA..BAAAA" is a base64-encoded signature that corresponds to a marshaled CREDENTIAL_TARGET_INFORMATION structure.
Attackers can use this technique to coerce authentication from victim systems to attacker-controlled hosts.
It is one of the strong indicators of a Kerberos coercion attack, where adversaries manipulate DNS records
to spoof Service Principal Names (SPNs) and redirect authentication requests like in CVE-2025-33073.
If you see this pattern in the command line, it is likely an attempt to add spoofed Service Principal Names (SPNs) to DNS records,
or checking for the presence of such records through the `nslookup` command.
Detects when Kubernetes Secrets are Modified or Deleted.
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