TCP Port 6837
About TCP Port 6837
Port 6837 has no formal IANA registration. Ports in this numerical range can be assigned by IANA but this specific port has no current registration. It is referenced in 12 IDS rules and exhibits moderate malware activity indicators. Ports outside formal IANA assignment are commonly used by malware authors and security tooling.
IDS Rule References
12 IDS / security rules reference TCP port 6837. Treat that number as context, not a danger score. Many detection rules are written against groups of ports rather than one service, web ports especially, so common web alternate ports inherit large counts while genuinely sensitive services can show few rules or none. Presence in IDS rules does not mean traffic on this port is malicious.
Rule categories (top 5): policy-violation (7), trojan-activity (2), command-and-control (1), attempted-user (1), misc-attack (1).
Sample rule descriptions for TCP port 6837:
- SERVER-OTHER CHAT IRC topic overflow
- POLICY-SOCIAL IRC nick change
- SERVER-OTHER CHAT IRC Ettercap parse overflow attempt
- POLICY-SOCIAL IRC message
- POLICY-SOCIAL IRC DCC file transfer request
Malware Rule References
A meaningful share of the IDS rules that reference this port are malware related.
3 of the 12 IDS rules that reference TCP port 6837 are malware related. That describes detection coverage across the whole internet, not anything about your machine or your network.
Families observed (top 2): MAGICHOUND.MPK (1), Siloscape (1).
Data Sources
This information is compiled from: Emerging Threats Open Ruleset (BSD 2-Clause / GPLv2 per SID range), Snort Community Rules (GPLv2), and MITRE ATT&CK (Apache 2.0).