Suspicious CrushFTP Child Process
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About the rule
Rule Type
Standard
Rule Description
Detects suspicious child processes spawned by the CrushFTP service, indicating potential remote code execution exploitation (e.g., CVE-2025-31161)
Severity
Trouble
Rule Requirement
Criteria
Action1:
actionname = "Process started" AND ( PARENTPROCESSNAME endswith "\crushftpservice.exe" ) AND ( PROCESSNAME endswith "\bash.exe,\cmd.exe,\cscript.exe,\mshta.exe,\powershell.exe,\powershell_ise.exe,\pwsh.exe,\sh.exe,\wscript.exe" OR ORIGINALFILENAME = "bash.exe,Cmd.Exe,Cscript.Exe,MSHTA.EXE,PowerShell.EXE,PowerShell_ISE.EXE,pwsh.dll,sh.exe,WScript.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
@Craig Sweeney, Matt Anderson, Jose Oregon, Tim Kasper, Faith Stratton, Samantha Shaw, Swachchhanda Shrawan Poudel (Nextron Systems)
