9090_external_internal

Explanation

This event is triggered by Netography's Fusion Portal when it detects a server on your network listening on port 9090 that has received a connection from an external IP address. The NDM works by identifying return traffic flowing from the server (in this case, the SRCIP) to an external IP address. This return traffic indicates that there may have been an external attacker that communicated with an internal device that had port 9090 exposed. Port 9090 is used for several purposes, including Linux server administration as well as management of several Ivanti products.

What to Look For

Investigate the SRCIP and determine if this server should have port 9090 exposed to external sources.

Related MITRE ATT&CK Categories

Initial Access, Persistence: External Remote Services, Technique T1133 - Enterprise

Initial Access: Exploit Public-Facing Application, Technique T1190 - Enterprise