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Port 12346 Details

known port assignments and vulnerabilities
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Port(s) Protocol Service Details Source
12346 tcp NetBus NetBus Trojan Horse uses this port.

Because of the common sequence of numbers "1 2 3 4 5" this port is commonly chosen when configuring programs, or as default port number.

Some other trojan horses/backdoors that use this port: Ashley, Fat Bitch trojan, GabanBus, icmp_client.c, icmp_pipe.c, Mypic, NetBus, Pie Bill Gates, Whack Job, X-bill
Backdoor.Amitis - remote access trojan, 05.2003. Affects all current Windows versions, listens on ports 3547, 7823, 12345, 13173, 44280, 44390, 47387, 64429

Backdoor.Wasil (2002.09.06) - a backdoor trojan that gives an attacker unauthorized access to an infected computer. By default it opens ports 12346 on the compromised computer.

Trend Micro's OfficeScan products use port 12345 as well (see Securityfocus BugtraqID: 1013).
12346 tcp trojan [trojan] NetBus Trojans
12346-12752 tcp,udp Unassigned IANA
12346 tcp FatBitchtrojan [trojan] Fat Bitch trojan SANS
12346 tcp GabanBus [trojan] GabanBus SANS
12346 tcp NetBus [trojan] NetBus SANS
12346 tcp NetBus [trojan] NetBus backdoor trojan SANS
12346 tcp X-bill [trojan] X-bill SANS
12346 tcp netbus NetBus backdoor trojan Nmap
12346 tcp,udp threat Fat Bitch trojan Bekkoame
12346 tcp,udp threat GabanBus Bekkoame
12346 tcp,udp threat NetBus Bekkoame
12346 tcp,udp threat X-bill Bekkoame
13 records found
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Related ports: 12345  20034  

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External Resources
SANS Internet Storm Center: port 12346

Well Known Ports: 0 through 1023.
Registered Ports: 1024 through 49151.
Dynamic/Private : 49152 through 65535.

TCP ports use the Transmission Control Protocol. TCP is the most commonly used protocol on the Internet and any TCP/IP network. Whereas the IP protocol deals only with packets, TCP enables two hosts to establish a connection and exchange streams of data. TCP guarantees delivery of data and that packets will be delivered in the same order in which they were sent. Guaranteed communication/delivery is the key difference between TCP and UDP.

UDP ports use the Datagram Protocol, a communications protocol for the Internet network, transport, and session layers. Like TCP (Transmission Control Protocol), UDP is used with IP (the Internet Protocol) and makes possible the transmission of datagrams from one computer to applications on another computer, but unlike TCP, UDP is connectionless and does not guarantee reliable communication; it's up to the application that received the message to process any errors and verify correct delivery. UDP is often used with time-sensitive applications, such as audio/video streaming, where dropping some packets is preferable to waiting for delayed data.

When troubleshooting unknown open ports, it is useful to find exactly what services/processes are listening to them. This can be accomplished in both Windows command prompt and Linux variants using the "netstat -aon" command. We also recommend runnig multiple anti-virus/anti-malware scans to rule out the possibility of active malicious software. For more detailed and personalized help please use our forums.

Please use the "Add Comment" button below to provide additional information or comments about port 12346.
  User Reviews/Comments:
by Scott A - 2013-03-24 16:47
tcp port 12346 is used by the Android version of the Rhapsody music service. It is open any time the app or the background service is running. As far as I can tell it is not registered with the IANA.
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