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Home » Ports Database » Port Details
known port assignments and vulnerabilities
threat/application/port search:
| Port(s) | Protocol | Service | Details | Source |
|---|---|---|---|---|
| 12345 | tcp | NetBus | 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. Cubeworld Server uses port 12345 (TCP/UDP) opendkim default port (may also use ports 8891,54321) Tailscale (WireGuard-based open source app for secure private networks) uses port 12345 Some trojan horses/backdoors use this port: Ashley, Fat Bitch trojan, GabanBus, icmp_client.c, icmp_pipe.c, Mypic, NetBus Trojan, Pie Bill Gates, Whack Job, X-bill, ValvNet, TMListen, cron/crontab, Adoresshd. Backdoor.Amitis.B [Symantec-2003-051915-1012-99] (2003.05.19) Windows remote access trojan. Listens on ports 3547, 7823, 12345, 13173, 44280, 44390, 47387, 64429. Other variants of Backdoor.Amitis also use ports 27, 551. The Trend Micro OfficeScan uses port 12345. Client allows remote attackers to cause a denial of service by making 5 connections to port 12345, which raises CPU utilization to 100%. iSmartAlarm cube devices allow Denial of Service. Sending a SYN flood on port 12345 will freeze the "cube" and it will stop responding. Incorrect access control for the diagnostic files of the iSmartAlarm Cube One through 2.2.4.10 allows an attacker to retrieve them via a specifically crafted TCP request to port 12345 and 22306, and access sensitive information from the device. The Emerson DeltaV Distributed Control System (DCS) through 2022-04-29 mishandles authentication. It utilizes several proprietary protocols for a wide variety of functionality. These protocols include Firmware upgrade (18508/TCP, 18518/TCP); Plug-and-Play (18510/UDP); Hawk services (18507/UDP); Management (18519/TCP); Cold restart (18512/UDP); SIS communications (12345/TCP); and Wireless Gateway Protocol (18515/UDP). None of these protocols have any authentication features, allowing any attacker capable of communicating with the ports in question to invoke (a subset of) desired functionality. | SG |
| 12345 | tcp,udp | NetBus - remote administration tool (often Trojan horse). Also used by NetBuster. Little Fighter 2 (TCP). (unofficial) | Wikipedia | |
| 12345 | tcp | trojan | Ashley, BlueIce 2000, Mypic , NetBus , Pie Bill Gates, Q-taz , Sensive, Snape, Vagr Nocker, ValvNet , Whack Job | Trojans |
| 12345 | udp | trojan | BlueIce 2000 | Trojans |
| 12345 | tcp | NetBus | [trojan] NetBus | SANS |
| 12345 | tcp | NetBus | [trojan] NetBus backdoor trojan | SANS |
| 12345 | tcp | netbus | NetBus backdoor trojan or Trend Micro Office Scan | Nmap |
| 12345 | tcp | Adoresshd | [trojan] Adore sshd | Neophasis |
| 12345 | tcp | Ashley | [trojan] Ashley | Neophasis |
| 12345 | tcp | cron/crontab | [trojan] cron / crontab | Neophasis |
| 12345 | tcp | FatBitchtrojan | [trojan] Fat Bitch trojan | Neophasis |
| 12345 | tcp | GabanBus | [trojan] GabanBus | Neophasis |
| 12345 | tcp | icmp_client.c | [trojan] icmp_client.c | Neophasis |
| 12345 | tcp | icmp_pipe.c | [trojan] icmp_pipe.c | Neophasis |
| 12345 | tcp | Mypic | [trojan] Mypic | Neophasis |
| 12345 | tcp | NetBusToy | [trojan] NetBus Toy | Neophasis |
| 12345 | tcp | NetBusworm | [trojan] NetBus worm | Neophasis |
| 12345 | tcp | PieBillGates | [trojan] Pie Bill Gates | Neophasis |
| 12345 | tcp | TMListen | TrendMicro OfficeScan TMListen | Neophasis |
| 12345 | tcp | ValvNet | [trojan] ValvNet | Neophasis |
| 12345 | tcp | WhackJob | [trojan] Whack Job | Neophasis |
| 12345 | tcp | X-bill | [trojan] X-bill | Neophasis |
| 12345 | tcp,udp | threat | Amitis | Bekkoame |
| 12345 | tcp,udp | threat | Ashley | Bekkoame |
| 12345 | tcp,udp | threat | cron / crontab | Bekkoame |
| 12345 | tcp,udp | threat | Fat Bitch trojan | Bekkoame |
| 12345 | tcp,udp | threat | GabanBus | Bekkoame |
| 12345 | tcp,udp | threat | icmp_client.c | Bekkoame |
| 12345 | tcp,udp | threat | icmp_pipe.c | Bekkoame |
| 12345 | tcp,udp | threat | Mypic | Bekkoame |
| 12345 | tcp,udp | threat | NetBus | Bekkoame |
| 12345 | tcp,udp | threat | NetBus Toy | Bekkoame |
| 12345 | tcp,udp | threat | NetBus worm | Bekkoame |
| 12345 | tcp,udp | threat | Notice how this port is the sequence of numbers "1 2 3 4 5". This is common chosen whenever somebody is asked to configure a port number. It is likewise chosen by programmers when creating default port numbers for their products. One very famous such uses is with NetBus. Trend Micro's OfficeScan products use this port. | Bekkoame |
| 12345 | tcp,udp | threat | Pie Bill Gates | Bekkoame |
| 12345 | tcp,udp | threat | Whack Job | Bekkoame |
| 12345 | tcp,udp | threat | X-bill | Bekkoame |
| 12345 | tcp,udp | italk | Italk Chat System | IANA |
SG security scan: port 12345 | jump to: |
Related ports: 27 551 2547 7823 8891 12346 20034 22306 54321 56789
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External Resources
SANS ISC: port 12345
Notes:
Port numbers in computer networking represent communication endpoints. Ports are unsigned 16-bit integers (0-65535) that identify a specific process, or network service. IANA is responsible for internet protocol resources, including the registration of commonly used port numbers for well-known internet services.
Well Known Ports: 0 through 1023.
Registered Ports: 1024 through 49151.
Dynamic/Private : 49152 through 65535.
TCP ports use the Transmission Control Protocol, the most commonly used protocol on the Internet and any TCP/IP network. 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. Like TCP, UDP is used in combination with IP (the Internet Protocol) and facilitates 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 and realtime gaming, 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.
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