Testing Usage of Uncommonly Used Port
Last updated on:
In this page
About the rule
Rule Type
Standard
Rule Description
Adversaries may communicate using a protocol and port paring that are typically not associated. For example, HTTPS over port 8088(Citation: Symantec Elfin Mar 2019) or port 587(Citation: Fortinet Agent Tesla April 2018) as opposed to the traditional port 443.
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "PowerShell Script Block Logged" AND (SCRIPTEXECUTED contains "Test-NetConnection" AND SCRIPTEXECUTED contains "-ComputerName " AND SCRIPTEXECUTED contains "-port ") AND SCRIPTEXECUTED notcontains " 443 , 80 " select Action1.HOSTNAME,Action1.MESSAGE,Action1.SCRIPTEXECUTED
Detection
Execution Mode
realtime
Log Sources
Windows
Author
frack113
