Potential Persistence Via Visual Studio Tools for Office
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About the rule
Rule Type
Standard
Rule Description
Detects persistence via Visual Studio Tools for Office (VSTO) add-ins in Office applications.
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "Registry value modified" AND (OBJECTNAME contains "\Software\Microsoft\Office\Outlook\Addins\,\Software\Microsoft\Office\Word\Addins\,\Software\Microsoft\Office\Excel\Addins\,\Software\Microsoft\Office\Powerpoint\Addins\,\Software\Microsoft\VSTO\Security\Inclusion" OR ((OBJECTNAME endswith "\Software\Microsoft\Office\Outlook\Addins" AND isExist(OBJECTVALUENAME)) OR (OBJECTNAME endswith "\Software\Microsoft\Office\Word\Addins" AND isExist(OBJECTVALUENAME)) OR (OBJECTNAME endswith "\Software\Microsoft\Office\Excel\Addins" AND isExist(OBJECTVALUENAME)) OR (OBJECTNAME endswith "\Software\Microsoft\Office\Powerpoint\Addins" AND isExist(OBJECTVALUENAME)) OR (OBJECTNAME endswith "\Software\Microsoft\VSTO\Security\Inclusion" AND isExist(OBJECTVALUENAME)))) AND (PROCESSNAME notendswith "\msiexec.exe,\regsvr32.exe" AND PROCESSNAME notendswith "\excel.exe,\integrator.exe,\OfficeClickToRun.exe,\winword.exe,\visio.exe" AND PROCESSNAME notendswith "\Teams.exe" AND (PROCESSNAME != "C:\Program Files\AVG\Antivirus\RegSvr.exe" OR (OBJECTNAME notcontains "\Microsoft\Office\Outlook\Addins\Antivirus.AsOutExt" AND (OBJECTNAME notendswith "\Microsoft\Office\Outlook\Addins\Antivirus.AsOutExt" OR isNotExist(OBJECTVALUENAME))))) select Action1.HOSTNAME,Action1.MESSAGE,Action1.OBJECTNAME,Action1.PROCESSNAME,Action1.PREVVAL,Action1.CHANGES
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Bhabesh Raj


