Sigma detection rules, expert-reviewed

PowerShell Net.WebClient DownloadFile/DownloadString Usage (Classic)

Flags PowerShell Classic commands using Net.WebClient to download content via DownloadFile or DownloadString.

Windows System Service Execution of Credential Dumping Tools (Service Control Manager Event 7045)

Flags Service Control Manager service creation with ImagePath names tied to credential dumping tools (Event ID 7045).

Windows Security EID 4697 Service Execution of Credential Dumping Tools

Alerts on Event ID 4697 service execution paths containing common credential dumping tool names on Windows.

Windows: Detects Access to ADMIN$ Network Share (Event 5140)

Alerts on Windows Security event 5140 entries where an access request targets the ADMIN$ share.

Windows LSASS Remote Thread Creation Indicative of Password Dumping

Flags Windows remote thread creation targeting lsass.exe, a common pattern in password dumping activity.

Windows Security: Suspicious Failed Logons Using Uncommon Status/Substatus Codes

Alerts on Windows failed logons (4625/4776) with specific restricted-status codes indicating potential account tampering or access probing.

Windows Security Event 4794 Password Change for DSRM Account

Flags potential changes to the DSRM administrator password on Windows domain controllers using Security EventID 4794.

Windows Security Events: SID History Added to Active Directory Object

Flags Windows Security events indicating Active Directory SIDHistory changes that can grant additional privileges.

Windows Application Logs: Match Antivirus Signature and Malware Keyword Hits

Alerts on Windows application log lines containing known AV signatures and malware keywords, excluding some anti-ransomware/keygen/crack terms.

Windows Driver Load from Temporary Directory Paths

Detects Windows driver loads whose ImageLoaded path contains the temporary directory (\Temp\).

Windows Security: Detect LSASS handle access for SAM_DOMAIN (0x705)

Flags handle opens to lsass.exe with access mask 0x705 targeting SAM_DOMAIN, indicative of credential dumping.

Windows Kerberos TGT Issue Operations Failures (Event IDs 675/4768/4769/4771)

Alerts on Windows Security failures for Kerberos TGT-related operations using specific Kerberos event IDs and status codes.

Windows Kerberos Service Tickets Requesting RC4 Encryption (EventID 4769)

Flags Windows Kerberos service ticket requests using RC4 encryption while excluding '$' machine/service accounts.

Windows Event Logs: Mimikatz Keyword Indicators

Detects Mimikatz-related keywords in Windows event logs while filtering Sysmon EventID 15 to limit noise.

Windows Event Log Cleared (Microsoft-Windows-Eventlog EventID 104)

Alerts when Windows event logs are cleared, based on Microsoft-Windows-Eventlog Event ID 104 from System telemetry.