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Port 1027 Details

known port assignments and vulnerabilities
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Port(s) Protocol Service Details Source
1027 tcp trojans Infostealer.ABCHlp (2003.05.06) - a password-stealing, Backdoor trojan horse. The program attempts to send password information from a compromised computer to an address in China. By default it makes use of port 1027.

ICKiller trojan uses this port

Microsoft operating systems tend to allocate one or more publicly exposed services (DCOM, etc.) among the first few ports immediately above the end of the system ports (1024+).
1027 udp 6a44 IPv6 Behind NAT44 CPEs [IESG] (IANA official) [RFC 6751] SG
1027 tcp trojan Clandestine, DataSpy Network X, KiLo, UandMe Trojans
1027 tcp icq icq instant messanger SANS
1027 tcp IIS IIS Nmap
1027 tcp ICKiller [trojan] ICKiller Neophasis
1027 tcp,udp threat ABCHlp Bekkoame
1027 udp 6a44 IPv6 Behind NAT44 CPEs [RFC6751] , registered 2012-08-02 IANA
1027 tcp Reserved IANA
1025-1029 tcp,udp NFS, IIS, etc. Ports > 1024 are designated for dynamic allocation by Windows. When programs ask for the "next available" socket, they usually get sequential ports starting at 1025.

Ports 1026/udp - 1027/udp are usually used by Messenger Popup Spam as well.
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Related ports: 1024  1025  1026  

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External Resources
SANS Internet Storm Center: port 1027

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.

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