Suspicious Child Process of Notepad++ Update Components
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About the rule
Rule Type
Standard
Rule Description
Detects Notepad++ update components (updater or installer) spawning scripting engines, which is not expected during legitimate update behavior and may indicate supply-chain compromise.
Severity
Critical
Rule Requirement
Criteria
Action1:
actionname = "Process started" AND ((( PARENTPROCESSNAME endswith "\gup.exe,\WinGUp.exe" ) OR ( PARENTPROCESSNAME contains "npp" AND PARENTPROCESSNAME contains "installer" )) AND ( PROCESSNAME contains "\cmd.exe,\powershell.exe,\pwsh.exe,\cscript.exe,\wscript.exe,\mshta.exe" AND COMMANDLINE contains "bitsadmin,certutil,curl,finger,forfiles,regsvr32,rundll32,wget" ))
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
@Swachchhanda Shrawan Poudel (Nextron Systems)
