Sigma detection rules, expert-reviewed

Windows Process Creation: bitsadmin Downloads Files to Suspicious Directories

Flags bitsadmin.exe file downloads that target suspicious folders using /transfer, /create, and /addfile command-line parameters.

Windows Process Creation: BITSAdmin Downloading File with Suspicious Extension

Flags bitsadmin.exe commands that transfer or add files with suspicious extensions based on process creation command-line content.

Windows BITSAdmin Downloads from File-Sharing Domains

Alerts on BITSAdmin downloads from popular file-sharing domains when transfer/create/addfile command-line flags are present.

Windows Process Creation: bitsadmin Download Using Direct IP URL

Alerts when bitsadmin.exe is used to download via a direct IP address in the command line on Windows.

Windows attrib.exe sets hidden system file attribute (+s) on suspicious paths and script/executable extensions

Flags attrib.exe usage with +s to mark .exe/.dll and script files in public/temp/user-writable locations as system files.

PowerShell Disable or Remove ETW Trace Sessions

Flags PowerShell commands that remove or disable ETW trace providers to impair Windows telemetry.

Windows BITS Transfer Job Download to Suspicious File Paths

Flags new Windows BITS transfer jobs that save downloaded files into predefined suspicious paths.

Windows BITS Client Downloads From File-Sharing Domains

Alerts on Windows BITS transfers (EventID 16403) that download from known file-sharing/content hosting domains.

Windows dllhost.exe Launched With No Command-Line Arguments

Alerts on dllhost.exe being executed with no command-line arguments, a rare pattern that may indicate stealthy or injected activity.

WerFault lsass.exe access indicating credential dumping attempts on Windows

Alert on WerFault.exe gaining broad access to lsass.exe, consistent with credential dumping attempts.

Windows HandleKatz: Duplicate LSASS Handle via Process Access with Handle Duplication Rights

Flags HandleKatz-style behavior duplicating an existing LSASS handle using PROCESS_DUP_HANDLE and ntdll.dll call trace.

Windows WerFault LSASS Memory Dump File Creation

Flags WerFault dump creation where the dump filename suggests it contains LSASS memory.

Windows: Potential Process Injection via Msra.exe Spawning Suspicious Child Processes

Flags Msra.exe spawning suspicious tools that may indicate process injection or post-exploitation activity on Windows.

Windows DNS Queries Containing ufile.io Domain

Alerts on Windows DNS lookups where the queried name contains ufile.io, indicating potential exfiltration-related activity.

Windows Process Execution: msdt.exe Launched with -cab Flag

Alerts when msdt.exe is started with the "-cab" argument, consistent with suspicious cabinet-based diagcab usage.