Scripting/CommandLine Process Spawned Regsvr32
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About the rule
Rule Type
Standard
Rule Description
Detects various command line and scripting engines/processes such as "PowerShell", "Wscript", "Cmd", etc. spawning a "regsvr32" instance.
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "Process started" AND (PARENTPROCESSNAME endswith "\cmd.exe,\cscript.exe,\mshta.exe,\powershell_ise.exe,\powershell.exe,\pwsh.exe,\wscript.exe" AND PROCESSNAME endswith "\regsvr32.exe") AND (PARENTPROCESSNAME != "C:\Windows\System32\cmd.exe" OR COMMANDLINE notendswith " /s C:\Windows\System32\RpcProxy\RpcProxy.dll") select Action1.HOSTNAME,Action1.MESSAGE,Action1.COMMANDLINE,Action1.FILE_NAME,Action1.PROCESSNAME,Action1.USERNAME,Action1.PARENTPROCESSNAME
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems)
