Potential Attachment Manager Settings Associations Tamper
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About the rule
Rule Type
Standard
Rule Description
Detects tampering with attachment manager settings policies associations to lower the default file type risks (See reference for more information)
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "Registry value modified" AND (OBJECTNAME contains "\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Associations" OR (OBJECTNAME endswith "\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Associations" AND isExist(OBJECTVALUENAME))) AND ((OBJECTNAME endswith "\DefaultFileTypeRisk" AND (INFORMATION = "DWORD (0x00006152)" OR (CHANGES = 24914 AND NEWTYPE = "REG_DWORD"))) OR (OBJECTNAME endswith "\LowRiskFileTypes" AND INFORMATION contains ".zip;,.rar;,.exe;,.bat;,.com;,.cmd;,.reg;,.msi;,.htm;,.html;")) 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)
