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New DDoS Trojan Increases the Problems for IoT Devices Owners

by Unallocated Author

A new malware family written by what appears to be an experienced coder is aiming for Linux-based IoT devices, with the main purpose of adding those devices to a botnet and carrying out DDoS attacks.

Discovered by security researcher MalwareMustDie, this new malware family is named Linux/IRCTelnet and is written in C++.

The researcher says the malware works by infecting Linux-based devices that expose Telnet ports to the Internet and use weak passwords.

IRCTelnet learns from other popular IoT malware

IRCTelnet brute-forces a device’s Telnet ports, infects the equipment’s OS, and adds it to a botnet that’s controlled through IRC. This means that every infected bot connects to an IRC channel, and reads commands posted in the main chatroom.

The concept is not new by any stretch of the imagination, with many IoT, Linux, and Windows malware operating in the same way.

MalwareMustDie says IRCTelnet takes a lot of inspiration from other IoT malware. The concept of using IRC for managing the bots is obviously borrowed from Kaiten, the malware that had the most success with it.

Similarly, the Telnet scanner and brute-forcing system is borrowed from GafGyt (also known as Torlus, Lizkebab, Bashlite, or Bashdoor), while the list of default Telnet credentials is taken from the more recent Mirai malware.

MalwareMustDie says this malware is capable of infecting any device running a Linux Kernel version 2.6.32 or above.

Support is included for launching DDoS attacks with spoofed IPv4 and IPv6 addresses, but the Telnet scanner can only find and brute-force IPs via IPv4.

MalwareMustDie says that there are multiple places in the malware’s source code where its author had used the Italian language, more to be than just a random copy-paste.


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