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Port 420 Details


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Port(s) Protocol Service Details Source
420 tcp trojans W32.Kibuv.Worm [Symantec-2004-051411-1858-99] (2004.05.14) - a worm that exploits the LSASS vulnerability (described in Microsoft Security Bulletin [MS04-011]) and the DCOM RPC vulnerability described in (Microsoft Security Bulletin [MS03-026]). Starts an FTP server on TCP port 9604, also listens on TCP port 420, and attempts to exploit the DCOM RPC vulnerability on TCP port 135.

Other trojans that also use this port: Breach, Incognito
Port is IANA registered for: SMPTE
SG
420 tcp trojan [trojan] Breach Trojans
420 tcp Breach [trojan] Breach SANS
420 tcp Incognito [trojan] Incognito SANS
420 tcp threat W32.Kibuv.Worm Bekkoame
420 tcp,udp smpte SMPTE IANA
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Related ports: 135  9604  

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External Resources
SANS ISC: port 420

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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