Suspicious Chromium Browser Instance Executed With Custom Extension
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About the rule
Rule Type
Standard
Rule Description
Detects a suspicious process spawning a Chromium based browser process with the 'load-extension' flag to start an instance with a custom extension
Severity
Trouble
Rule Requirement
Criteria
Action1:
actionname = "Process started" AND PARENTPROCESSNAME endswith "\cmd.exe,\cscript.exe,\mshta.exe,\powershell.exe,\pwsh.exe,\regsvr32.exe,\rundll32.exe,\wscript.exe" AND PROCESSNAME endswith "\brave.exe,\chrome.exe,\msedge.exe,\opera.exe,\vivaldi.exe" AND COMMANDLINE contains "--load-extension="
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
Aedan Russell, frack113, X__Junior (Nextron Systems)
