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Port 1111 Details

known port assignments and vulnerabilities
threat/application/port search:
Port(s) Protocol Service Details Source
1111 tcp trojans Trojans that use this port:
Backdoor.AIMvision [Symantec-2002-101713-3321-99] (2002.10.17) - remote access trojan. Affects all current Windows versions.
Backdoor.Ultor [Symantec-2002-061316-4604-99] (2002.06.13) - remote access trojan. Affects Windows, listens on port 1111 or 1234.
Backdoor.Daodan - VB6 remote access trojan, 07.2000. Affects Windows.
W32.Suclove.A@mm [Symantec-2005-092612-2130-99] (2005.09.25) - a mass-mailing worm with backdoor capabilities that spreads through MS Outlook and MIRC. Opens a backdoor and listens for remote commands on port 1111/tcp.

Daodan, Tport trojans also use this port.

The Administration Service (FMSAdmin.exe) in Macromedia Flash Media Server 2.0 r1145 allows remote attackers to cause a denial of service (application crash) via a malformed request with a single character to port 1111.
References: [CVE-2005-4216], [BID-15822] / Weak Hardcoded Credentials - the malware listens on TCP port 1111, drops an executable named "Spoolsw.exe" under SysWOW64 dir that runs with SYSTEM integrity. The password "TrFsB-RuleZ" is stored in plaintext and can be easily found running strings util against the malware executable.
References: [MVID-2021-0207]

LM Social Server (IANA official)
1111 tcp trojan Daodan, Ultors Trojan Trojans
1111 udp trojan Daodan Trojans
1111 tcp threat W32.Suclove Bekkoame
1111 tcp,udp threat AIMVision Bekkoame
1111 tcp,udp lmsocialserver LM Social Server IANA
6 records found
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External Resources
SANS Internet Storm Center: port 1111

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.

Please use the "Add Comment" button below to provide additional information or comments about port 1111.
  User Reviews/Comments:
by khe2812 - 2015-09-20 15:30
Port 1111 is also used by Cisco wireless controllers.
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