Potentially Suspicious Child Process Of Regsvr32

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About the rule

Rule Type

Standard

Rule Description

Detects potentially suspicious child processes of "regsvr32.exe".

Severity

Trouble

Rule Requirement

Criteria

Action1: actionname = "Process started" AND (PARENTPROCESSNAME endswith "\regsvr32.exe" AND PROCESSNAME endswith "\calc.exe,\cscript.exe,\explorer.exe,\mshta.exe,\net.exe,\net1.exe,\nltest.exe,\notepad.exe,\powershell.exe,\pwsh.exe,\reg.exe,\schtasks.exe,\werfault.exe,\wscript.exe") AND (PROCESSNAME notendswith "\werfault.exe" OR COMMANDLINE notcontains " -u -p ") select Action1.HOSTNAME,Action1.MESSAGE,Action1.COMMANDLINE,Action1.FILE_NAME,Action1.PROCESSNAME,Action1.USERNAME,Action1.PARENTPROCESSNAME

Detection

Execution Mode

realtime

Log Sources

Windows

Author

elhoim, Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems)