Explorer Process Tree Break
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About the rule
Rule Type
Standard
Rule Description
Detects a command line process that uses explorer.exe to launch arbitrary commands or binaries, which is similar to cmd.exe /c, only it breaks the process tree and makes its parent a new instance of explorer spawning from "svchost"
Severity
Trouble
Rule Requirement
Criteria
Action1:
actionname = "Process started" AND COMMANDLINE contains "/factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b}" OR (COMMANDLINE contains "explorer.exe" AND COMMANDLINE contains " -root,, /root,, –root,, —root,, ―root,")
select Action1.HOSTNAME,Action1.MESSAGE,Action1.COMMANDLINE,Action1.FILE_NAME,Action1.PROCESSNAME,Action1.USERNAME,Action1.PARENTPROCESSNAME,Action1.DOMAIN,Action1.ORIGINALFILENAME,Action1.PARENTPROCESSID,Action1.PROCESSID,Action1.PRODUCT_NAME,Action1.SECURITYID
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems), @gott_cyber
