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Port 12000 Details

known port assignments and vulnerabilities
threat/application/port search:
Port(s) Protocol Service Details Source
12000 tcp trojans SatanCrew - remote access trojan, 08.2002. Affects Windows 9x/Me,NT,2K,XP

W32.Mytob.GN@mm (06.30.2005) - mass-mailing worm with its own SMTP engine and backdoor capabilities. Sends itself to email addresses it finds on the compromised computer. Opens and IRC backdoor on port 12000/tcp.

Applications that use this port: Phantasy Star Universe, ClearCommerce Engine 4.x (

Wizard 101 uses ports 12000-12999 (TCP/UDP)

eosfailoverservice.exe in C3-ilex EOScada before allows remote attackers to cause a denial of service by sending a large amount of data to TCP port 12000.
References: [CVE-2012-1813]

IANA assigned to: entextxid - IBM Enterprise Extender SNA XID Exchange
12000 tcp trojan Reverse Trojan Trojans
12000 tcp,udp entextxid IBM Enterprise Extender SNA XID Exchange IANA
11000-11001, 11100-11101, 12000-12010 tcp applications Phantasy Star Universe Portforward
12000 tcp cce4x ClearCommerce Engine 4.x ( Nmap
12000 tcp threat W32.Mytob Bekkoame
6 records found
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Related ports: 12999  

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External Resources
SANS Internet Storm Center: port 12000

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 12000.
  User Reviews/Comments:
by Tri0X - 2014-10-19 12:53
This port is used by the Motorola cell phone software. When you plug a Motorola phone into your computer and install the software, this port will open up.

I removed all parts of the software from Motorola and then this port was no longer showing in Nmap scans.
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