Potential Persistence Via DLLPathOverride
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About the rule
Rule Type
Standard
Rule Description
Detects when an attacker adds a new "DLLPathOverride" value to the "Natural Language" key in order to achieve persistence which will get invoked by "SearchIndexer.exe" process
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "Registry value modified" AND (OBJECTNAME contains "\SYSTEM\CurrentControlSet\Control\ContentIndex\Language" OR (OBJECTNAME endswith "\SYSTEM\CurrentControlSet\Control\ContentIndex\Language" AND isExist(OBJECTVALUENAME))) AND (OBJECTNAME contains "\StemmerDLLPathOverride,\WBDLLPathOverride,\StemmerClass,\WBreakerClass" OR (OBJECTNAME contains "\StemmerDLLPathOverride,\WBDLLPathOverride,\StemmerClass,\WBreakerClass" OR OBJECTVALUENAME contains "\StemmerDLLPathOverride,\WBDLLPathOverride,\StemmerClass,\WBreakerClass")) select Action1.HOSTNAME,Action1.MESSAGE,Action1.OBJECTNAME,Action1.PROCESSNAME,Action1.PREVVAL,Action1.CHANGES
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Nasreddine Bencherchali (Nextron Systems)
