August 8, 2016
A Trojan, named Linux.Lady.1, can execute a limited range of actions such as to determine an external IP address of the infected computer, to attack other computers, and to download and launch a cryptocurrency mining software. Linux.Lady.1 is written in the Google developed programming language—Go. Although Doctor Web security researchers have already encountered Trojans written in Go, such malware programs are not frequently detected in the wild. The architecture of the Trojan consists of numerous libraries published on GitHub—the most popular collaborative application development service.
Once Linux.Lady.1 is launched, it sends the following information to the command and control server: the current Linux version and the name of the operating system family it belongs to, a number of CPUs, names and a number of running processes, and so on. The Trojan receives a configuration file necessary for downloading and launching of a cryptocurrency mining program in order to generate income which is then transferred to the cybercriminals’ e-wallet.
Linux.Lady.1 can also determine an external IP address of the infected computer using special websites, specified in the configuration file, and attack other computers of the network. The Trojan tries to connect to the remote servers via a port used by the Redis (remote dictionary server) data structure store, without entering a password in expectation that the system has not been configured correctly. If the connection is established, the malware adds a downloader script, named Linux.DownLoader.196, to the cron scheduler. The script downloads a copy of Linux.Lady.1 and installs it on the compromised host. Then the Trojan adds a key for connection to the computer over SSH protocol to the list of authorized keys.
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