A malicious program designed to attack ATMs of one popular payment system in Russia. It is distributed as a dynamic-link library via infected flash drives and droppers.
Using the DllUnregisterServer function, the Trojan registers itself with the name Taskbar in the HKCU\Software\Microsoft\Windows\CurrentVersion\Run registry branch responsible for autorun. Then with the help of the DllRegisterServer function, the Trojan attempts to find the running maratl.exe process. If the attempt fails, Trojan.PWS.OSMP.21 initiates a routine to infect flash drives. If the process is detected, the malicious program tries to retrieve the config\config.dat file and logs from the folder containing the corresponding executable file. In addition to that, the Trojan gathers information regarding the hard drive. Subsequently, using a POST request, all the data is transmitted in an encrypted format to cybercriminals' server. If the data transfer is successful, the Trojan deletes itself.
If the operating system (OS) can be loaded (either normally or in safe mode), download Dr.Web Security Space and run a full scan of your computer and removable media you use. More about Dr.Web Security Space.
If you cannot boot the OS, change the BIOS settings to boot your system from a CD or USB drive. Download the image of the emergency system repair disk Dr.Web® LiveDisk , mount it on a USB drive or burn it to a CD/DVD. After booting up with this media, run a full scan and cure all the detected threats.
If the mobile device is operating normally, download and install Dr.Web for Android. Run a full system scan and follow recommendations to neutralize the detected threats.
If the mobile device has been locked by Android.Locker ransomware (the message on the screen tells you that you have broken some law or demands a set ransom amount; or you will see some other announcement that prevents you from using the handheld normally), do the following:
Load your smartphone or tablet in the safe mode (depending on the operating system version and specifications of the particular mobile device involved, this procedure can be performed in various ways; seek clarification from the user guide that was shipped with the device, or contact its manufacturer);
Once you have activated safe mode, install the Dr.Web for Android onto the infected handheld and run a full scan of the system; follow the steps recommended for neutralizing the threats that have been detected;