Suspicious SSL Connection
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About the rule
Rule Type
Standard
Rule Description
Adversaries may employ a known encryption algorithm to conceal command and control traffic rather than relying on any inherent protections provided by a communication protocol.
Severity
Attention
Rule Requirement
Criteria
Action1: actionname = "PowerShell Script Block Logged" AND SCRIPTEXECUTED contains "System.Net.Security.SslStream" AND SCRIPTEXECUTED contains "Net.Security.RemoteCertificateValidationCallback" AND SCRIPTEXECUTED contains ".AuthenticateAsClient" select Action1.HOSTNAME,Action1.MESSAGE,Action1.SCRIPTEXECUTED
Detection
Execution Mode
realtime
Log Sources
Windows
Author
frack113
