TCP Port 9988 – nsesrvr

About TCP Port 9988

The Internet Assigned Numbers Authority (IANA) registers port 9988 for nsesrvr. The IANA description reads: ‘Software Essentials Secure HTTP server’. This port is referenced in 2 IDS rules and exhibits low malware activity in monitored traffic.

IDS Rule References

2 IDS / security rules reference TCP port 9988. 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 (2).

Sample rule descriptions for TCP port 9988:

• ET MALWARE Win32/Recslurp.D C2 Request (no alert)
• ET MALWARE Win32/Recslurp.D C2 Response

Malware Activity

Some malware indicators are observed on this port.

2 of 2 IDS rules for TCP port 9988 involve malware activity.

Families observed (top 1): Win32_Recslurp_D (2).

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).