Conhost Spawned By Uncommon Parent Process
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About the rule
Rule Type
Standard
Rule Description
Detects when the Console Window Host (conhost.exe) process is spawned by an uncommon parent process, which could be indicative of potential code injection activity.
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "Process started" AND (PROCESSNAME endswith "\conhost.exe" AND PARENTPROCESSNAME endswith "\explorer.exe,\lsass.exe,\regsvr32.exe,\rundll32.exe,\services.exe,\smss.exe,\spoolsv.exe,\svchost.exe,\userinit.exe,\wininit.exe,\winlogon.exe") AND PARENTPROCESSCOMMANDLINE notcontains "-k apphost -s AppHostSvc,-k imgsvc,-k localService -p -s RemoteRegistry,-k LocalSystemNetworkRestricted -p -s NgcSvc,-k NetSvcs -p -s NcaSvc,-k netsvcs -p -s NetSetupSvc,-k netsvcs -p -s wlidsvc,-k NetworkService -p -s DoSvc,-k wsappx -p -s AppXSvc,-k wsappx -p -s ClipSVC,-k wusvcs -p -s WaaSMedicSvc" AND PARENTPROCESSCOMMANDLINE notcontains "C:\Program Files (x86)\Dropbox\Client\,C:\Program Files\Dropbox\Client" select Action1.HOSTNAME,Action1.MESSAGE,Action1.COMMANDLINE,Action1.FILE_NAME,Action1.PROCESSNAME,Action1.USERNAME,Action1.PARENTPROCESSNAME
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Tim Rauch, Elastic (idea)
