Potential Data Exfiltration Via Audio File
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About the rule
Rule Type
Standard
Rule Description
Detects potential exfiltration attempt via audio file using PowerShell
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "PowerShell Script Block Logged" AND (SCRIPTEXECUTED contains "[System.Math]::" AND SCRIPTEXECUTED contains "[IO.FileMode]::" AND SCRIPTEXECUTED contains "BinaryWriter") AND (SCRIPTEXECUTED contains "0x52" AND SCRIPTEXECUTED contains "0x49" AND SCRIPTEXECUTED contains "0x46" AND SCRIPTEXECUTED contains "0x57" AND SCRIPTEXECUTED contains "0x41" AND SCRIPTEXECUTED contains "0x56" AND SCRIPTEXECUTED contains "0x45" AND SCRIPTEXECUTED contains "0xAC") select Action1.HOSTNAME,Action1.MESSAGE,Action1.SCRIPTEXECUTED
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Nasreddine Bencherchali (Nextron Systems)
