A Trojan that acts as a keylogger. It can execute intruder-issued commands on the infected computer. To bypass User Accounts Control (UAC), the Trojan runs the temp.exe file extracting the Win7ElevateDll library (detected as Tool.Winelevate.1) from its own body. Next, using sysprep, the malware runs the ps.exe file (Trojan.MulDrop4.61259) that saves the C:\Program Files\Internet Explorer\icwnet.dll library on a disk. The library is registered in the Windows registry as Net Security Service with the following description: “keep watch on system security and configuration.if this services is stopped,protoected content might not be down loaded to the device”. The service launches using the StartService feature and runs as a svchost.exe process.
Once BackDoor.Saker.1 is launched, it starts gathering computer-related information, including Windows version, processor speed, RAM, computer name, user name, hard drive serial number. The gathered data is forwarded to the remote server controlled by cybercriminals. Then the Trojan creates the %SYSTEM32%\mskolog.dat file and saves it to a system folder. Key strokes are logged into this file.
The Trojan can execute the following commands: reboot or turn off the computer, remove itself, initiate a separate thread to execute a command using command interpreter or to launch own file manager that can load files from the user's computer, upload files via network, create folders, remove, relocate or run files.
