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Port 30005 Details


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Port(s) Protocol Service Details Source
30005 tcp trojans Port sometimes associated with TR-069 - application layer protocol for remote management of end-user devices. It is a bidirectional SOAP/HTTP-based protocol that provides communication between CPE devices and auto-configuration servers (ACS). It can be used by some modems, gateways, routers, VoIP phones, set-top boxes. TR-069 has some known exploits as demonstrated at the DEFCON22 conference. Cox Communcations reportedly uses this port.

If your modem/NAT router/gateway keeps this port open and you are sure you want to filter it (potential interference with ISPs pushing firmware updates), try the following. Navigate to your router's admin interface and disable TR-069. If that does not work, look under "port forwarding", or "virtual servers", and forward port 30005 to an unused local IP address, like (192.168.1.252)

Malware using this port: Backdoor JZ, Litmus trojan

Trojan-Dropper.Win32.Delf.xk / Remote Invalid Pointer Write DOS - Win32.Delf.xk drops server.exe in AppData\Local\Temp dir and listens on TCP ports 30005,30006 and 30007. Netcat to port 30005 and input the number 9 it trys to create a file, number 2 for read file and 3 for opening a file but errors out.
References: [MVID-2021-0130]
SG
30005 tcp trojan Litmus Trojans
30005 tcp BackdoorJZ [trojan] Backdoor JZ SANS
30005-30099 tcp,udp Unassigned IANA
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Related ports: 7547  30006  30007  

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External Resources
SANS Internet Storm Center: port 30005

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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