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Added to the Dr.Web virus database: 2012-01-27

Virus description added:

A family of Trojans designed to send out spam messages. Trojan.OneX.1 replaces messages sent by the user via Facebook chat with lines from the configuration file downloaded by the Trojan from a remote server.

The malware checks the presence of its copy via the 1xfbmain mutex. Then it looks for firefox, IEXPLORE, and iexplore processes and, using a mutex with the process PID, injects itself into these processes granting control to a special procedure. Once an hour the malicious program downloads an updated configuration file. When operating in IE, Trojan.OneX.1 intercepts the InternetWriteFile function; when operating in Firefox, the PR_Write function from nspr4.dll is intercepted.

Trojan.OneX.2 exploits pidgin, skype, msnmsgr, aim, icq.exe, yahoom, ymsg_tray.exe, googletalk, and xfire.exe processes. Unlike Trojan.OneX.1, it can use configuration data in Unicode format.

Depending on IM clients detected by the Trojan, messages are sent using different algorithms; at that, mouse and keyboard input is always blocked.

Curing recommendations

  1. 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.
  2. 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.
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Use Dr.Web Anti-virus for macOS to run a full scan of your Mac.

After booting up, run a full scan of all disk partitions with Dr.Web Anti-virus for Linux.

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  1. 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.
  2. 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;
    • Switch off your device and turn it on as normal.

Find out more about Dr.Web for Android