TCP Port 778
About TCP Port 778
Port 778 is not assigned to any service in the IANA Service Names and Port Numbers Registry. While most ports below 1024 are assigned to canonical services, this specific port has no current IANA registration. It is referenced in 3 IDS rules and exhibits low malware activity indicators. Ports outside formal IANA assignment are commonly used by malware authors and security tooling.
IDS Rule References
3 IDS / security rules reference TCP port 778. 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 1): trojan-activity (3).
Sample rule descriptions for TCP port 778:
- MALWARE-CNC Win.Trojan.Dropper inbound encrypted traffic
- MALWARE-CNC Win.Trojan.Dropper outbound encrypted traffic – potential exfiltration
- MALWARE-CNC Win.Trojan.Dropper outbound encrypted traffic
Malware Rule References
A small share of the IDS rules that reference this port are malware related.
3 of the 3 IDS rules that reference TCP port 778 are malware related. That describes detection coverage across the whole internet, not anything about your machine or your network.
Data Sources
This information is compiled from: Snort Community Rules (GPLv2).