Potential Persistence Via CHM Helper DLL
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About the rule
Rule Type
Standard
Rule Description
Detects when an attacker modifies the registry key "HtmlHelp Author" to achieve persistence
Severity
Trouble
Rule Requirement
Criteria
Action1:
actionname = "Registry value modified" AND OBJECTNAME contains "\Software\Microsoft\HtmlHelp Author\Location,\Software\WOW6432Node\Microsoft\HtmlHelp Author\Location" OR ((OBJECTNAME endswith "\Software\Microsoft\HtmlHelp Author" AND OBJECTVALUENAME startswith "Location") OR (OBJECTNAME endswith "\Software\WOW6432Node\Microsoft\HtmlHelp Author" AND OBJECTVALUENAME startswith "Location"))
select Action1.HOSTNAME,Action1.MESSAGE,Action1.OBJECTNAME,Action1.PROCESSNAME,Action1.PREVVAL,Action1.CHANGES,Action1.USERNAME,Action1.DOMAIN,Action1.NEWTYPE,Action1.OBJECTVALUENAME,Action1.OLDTYPE
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Nasreddine Bencherchali (Nextron Systems)
