UDP Port 666 – doom

About UDP Port 666

Port 666 is registered with the Internet Assigned Numbers Authority (IANA) for doom. The IANA description reads: ‘doom Id Software’. This port is referenced in 1 IDS rule and exhibits low malware activity in monitored traffic.

IDS Rule References

1 IDS / security rule reference UDP port 666. Presence in IDS rules does not mean traffic on this port is malicious. These are patterns security tools monitor.

Rule categories (top 1): command-and-control (1).

Sample rule descriptions for UDP port 666:

• ET MALWARE Reptile Rootkit Default UDP Magic Packet Trigger

Malware Activity

Some malware indicators are observed on this port.

1 of 1 IDS rule for UDP port 666 involve malware activity.

Families observed (top 1): Reptile_Rootkit (1).

Data Sources

This information is compiled from: IANA Service Name and Transport Protocol Port Number Registry, Emerging Threats Open Ruleset (BSD 2-Clause / GPLv2 per SID range), Snort Community Rules (GPLv2), and MITRE ATT&CK (Apache 2.0).