Suspicious Windows Defender Folder Exclusion Added Via Reg.EXE
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About the rule
Rule Type
Standard
Rule Description
Detects the usage of "reg.exe" to add Defender folder exclusions. Qbot has been seen using this technique to add exclusions for folders within AppData and ProgramData.
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "Process started" AND PROCESSNAME endswith "\reg.exe" AND COMMANDLINE contains "SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths,SOFTWARE\Microsoft\Microsoft Antimalware\Exclusions\Paths" AND (COMMANDLINE contains "ADD " AND COMMANDLINE contains "/t " AND COMMANDLINE contains "REG_DWORD " AND COMMANDLINE contains "/v " AND COMMANDLINE contains "/d " AND COMMANDLINE contains "0") select Action1.HOSTNAME,Action1.MESSAGE,Action1.COMMANDLINE,Action1.FILE_NAME,Action1.PROCESSNAME,Action1.USERNAME,Action1.PARENTPROCESSNAME
Detection
Execution Mode
realtime
Log Sources
Windows
Author
frack113
