TCP Port 8500 – fmtp

About TCP Port 8500

The Internet Assigned Numbers Authority (IANA) registers port 8500 for fmtp. The IANA description reads: ‘Flight Message Transfer Protocol’. This port is referenced in 2036 IDS rules and exhibits moderate malware activity in monitored traffic.

IDS Rule References

2036 IDS / security rules reference TCP port 8500. Presence in IDS rules does not mean traffic on this port is malicious. These are patterns security tools monitor.

Rule categories (top 6): trojan-activity (727), web-application-activity (476), web-application-attack (344), attempted-recon (270), misc-activity (76), attempted-user (58).

Sample rule descriptions for TCP port 8500:

• SERVER-WEBAPP PCCS mysql database admin tool access
• SERVER-WEBAPP HyperSeek hsx.cgi directory traversal attempt
• SERVER-WEBAPP SWSoft ASPSeek Overflow attempt
• SERVER-WEBAPP Progress webspeed access
• SERVER-WEBAPP yabb directory traversal attempt

Malware Activity

A meaningful share of monitored traffic on this port involves malware indicators.

679 of 2036 IDS rules for TCP port 8500 involve malware activity.

Families observed (top 8): Bancos (20), Fareit (15), Zeus (15), DesertFalcon (11), Symmi (11), Zebrocy (11), Chopper (10), Locky (9), and 261 more families.

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).