Suspicious Electron Application Child Processes
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About the rule
Rule Type
Standard
Rule Description
Detects suspicious child processes of electron apps (teams, discord, slack, etc.). This could be a potential sign of ".asar" file tampering (See reference section for more information) or binary execution proxy through specific CLI arguments (see related rule)
Severity
Trouble
Rule Requirement
Criteria
Action1:
actionname = "Process started" AND PARENTPROCESSNAME endswith "\chrome.exe,\discord.exe,\GitHubDesktop.exe,\keybase.exe,\msedge.exe,\msedgewebview2.exe,\msteams.exe,\slack.exe,\teams.exe" AND (PROCESSNAME endswith "\cmd.exe,\cscript.exe,\mshta.exe,\powershell.exe,\pwsh.exe,\regsvr32.exe,\whoami.exe,\wscript.exe" OR PROCESSNAME contains ":\ProgramData\,:\Temp\,\AppData\Local\Temp\,\Users\Public\,\Windows\Temp") AND (PARENTPROCESSNAME notendswith "\Discord.exe" OR PROCESSNAME notendswith "\cmd.exe" OR COMMANDLINE notcontains "\NVSMI\nvidia-smi.exe")
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
Nasreddine Bencherchali (Nextron Systems)
