TCP Port 2323 – 3d-nfsd

About TCP Port 2323

The Internet Assigned Numbers Authority (IANA) registers port 2323 for 3d-nfsd. The IANA description reads: ‘3d-nfsd’. This port is referenced in 30 IDS rules and exhibits high malware activity in monitored traffic.

IDS Rule References

30 IDS / security rules reference TCP port 2323. Presence in IDS rules does not mean traffic on this port is malicious. These are patterns security tools monitor.

Rule categories (top 2): attempted-admin (29), trojan-activity (1).

Sample rule descriptions for TCP port 2323:

• ET TELNET busybox MIRAI hackers – Possible Brute Force Attack
• ET TELNET busybox ECCHI hackers – Possible Brute Force Attack
• ET MALWARE Linux.Mirai Login Attempt (xc3511)
• ET MALWARE Possible Linux.Mirai Login Attempt (1111111)
• ET MALWARE Possible Linux.Mirai Login Attempt (54321)

Malware Activity

Malware activity is frequently observed on this port.

27 of 30 IDS rules for TCP port 2323 involve malware activity.

Families observed (top 1): Mirai (26).

Data Sources

This information is compiled from: IANA Service Name and Transport Protocol Port Number Registry and Emerging Threats Open Ruleset (BSD 2-Clause / GPLv2 per SID range).