Potential Registry Persistence Attempt Via Windows Telemetry
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About the rule
Rule Type
Standard
Rule Description
Detects potential persistence behavior using the windows telemetry registry key. Windows telemetry makes use of the binary CompatTelRunner.exe to run a variety of commands and perform the actual telemetry collections. This binary was created to be easily extensible, and to that end, it relies on the registry to instruct on which commands to run. The problem is, it will run any arbitrary command without restriction of location or type.
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "Registry value modified" AND ((OBJECTNAME contains "\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\TelemetryController" OR (OBJECTNAME endswith "\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\TelemetryController" AND isExist(OBJECTVALUENAME))) AND OBJECTNAME endswith "\Command" AND INFORMATION contains ".bat,.bin,.cmd,.dat,.dll,.exe,.hta,.jar,.js,.msi,.ps,.sh,.vb") AND INFORMATION notcontains "\system32\CompatTelRunner.exe,\system32\DeviceCensus.exe" select Action1.HOSTNAME,Action1.MESSAGE,Action1.OBJECTNAME,Action1.PROCESSNAME,Action1.PREVVAL,Action1.CHANGES
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Lednyov Alexey, oscd.community, Sreeman
