Sigma detection rules, expert-reviewed

Malicious DLL Sideloading via LOLBins from ProgramData by Dohdoor

This rule detects trusted Windows utilities loading propsys or batmeter DLLs from ProgramData or the Public directory. The Dohdoor campaign sideloads its payload through living-off-the-land binaries such as OpenWith and mblctr running from unusual paths. A signed utility loading a system-named DLL from a writable directory is a strong sideloading indicator.

Suspicious MSBuild LOLBin Spawning Script Interpreter (via process_creation)

This rule detects MSBuild.exe spawning PowerShell or cmd child processes which indicates inline task code execution abused as a signed binary proxy. Legitimate build automation rarely has MSBuild directly launching interactive script interpreters.

Malicious LOLBin Download Saved as Windows Utility ping.exe via certutil or curl

This rule detects use of certutil or curl to download a remote file and save it under the name of a legitimate Windows utility such as ping.exe. The Mysterious Elephant APT used this masquerading technique to stage payloads disguised as trusted system binaries. Writing downloaded content to a well-known utility name in a non-System32 location is a strong indicator of ingress tool transfer combined with defense evasion.

Malicious LOLBin Spawned by Outlook via MonikerLink CVE-2024-21413

This rule detects Microsoft Outlook spawning script interpreters or living off the land binaries such as mshta which is a hallmark of the MonikerLink CVE-2024-21413 exploitation chain. Successful exploitation lets an attacker bypass the Protected View warning and achieve code execution from a crafted email which makes any such child process highly suspicious.

Windows: Detect baaupdate.exe Spawning Scripting, Admin, or LOLBin Child Processes

Alerts when baaupdate.exe runs typical script/utility processes, an uncommon parent-child execution pattern on Windows.

Windows Process Creation: CrushFTP spawning PowerShell, CMD, and scripting tool execution

Detects CrushFTP launching PowerShell/CMD and related LOLBins with command patterns consistent with RCE exploitation behavior.

Windows: AddInUtil.exe LoLBin Executed from Non-Standard Directory

Alerts when AddInUtil.exe (AddInUtil.exe) runs from an uncommon directory path on Windows.

Suspicious LOLBIN Copy From Windows System Directories Using Windows Copy Tools

Flags cmd/PowerShell/robocopy/xcopy commands that copy known LOLBINs out of System32/SysWOW64/WinSxS.

Windows: Detect Loading amsi.dll by LOLBIN Processes

Alert on amsi.dll DLL loads initiated by ExtExport.exe, Odbcconf.exe, or Rundll32.exe on Windows.

Windows rundll32.exe Execution via cmd/cscript/powershell with .dll and Suspicious Directories

Alerts on rundll32.exe execution with DLL arguments from common Windows script/LOLBins and suspicious staging paths.

Windows: Suspicious child processes spawned from Veeam SQL Server service

Alerts on suspicious cmd/PowerShell/LOLBin and recon utilities spawned by the Veeam SQL service (sqlservr.exe with VEEAMSQL).

Windows: Renamed Visual Studio NodejsTools PressAnyKey.exe Execution

Flags Windows executions of renamed Microsoft.NodejsTools.PressAnyKey.exe to help spot LOLBIN-style abuse.

Windows Scheduled Task Execution of Uncommon Binaries (LOLBin Suspicion)

Alerts when a Windows Scheduled Task runs a process from a set of uncommon/suspicious binary paths.

Windows: Detect sftp.exe used as a LOLBIN via -D option

Alerts on Windows executions of sftp.exe using the -D flag with a path argument.

Windows: Detect kavremover-related LOLBIN command-line usage

Alerts on Windows process executions with 'run run-cmd' using kavremover/cleanapi-style LOLBIN invocation patterns.