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Port 420 Details

known port assignments and vulnerabilities
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Port(s) Protocol Service Details Source
420 tcp trojans W32.Kibuv.Worm (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
420 tcp trojan [trojan] Breach Trojans
420 tcp,udp smpte SMPTE IANA
420 tcp Breach [trojan] Breach SANS
420 tcp Incognito [trojan] Incognito SANS
420 tcp threat W32.Kibuv.Worm Bekkoame
6 records found
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Related ports: 135  9604  

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External Resources
SANS Internet Storm Center: port 420

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.

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