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Trojan.ArchiveLock.20

Added to the Dr.Web virus database: 2013-01-31

Virus description added:

A multicomponent ransomware Trojan written in PureBasic and designed to encrypt files using WinRAR. Once the malware penetrates the system, it prevents the user from operating the machine by displaying a ransom demand.

After it is launched as a system service, the Trojan's encryption module creates numerous files, part of which serve the purpose of storing configuration data, information on paths to settings files, logs and executable files, and data regarding the infected computer. Then Trojan.ArchiveLock.20 empties the Recycle Bin, creates a list of files to be encrypted, and deletes existing backup copies. Using a special algorithm, the Trojan generates a list of passwords and launches the console version of WinRAR to place files from the compiled list into password-protected, self-extracting archives. The malware can encrypt more than 100 file types. By employing the Sysinternals SDelete utility, Trojan.ArchiveLock.20 deletes original files by overwriting them multiple times, which makes it impossible to restore those files.

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While some files are encrypted using a simple password based on the hard drive serial number, other files are encrypted with a randomly generated password that can be more than 50 characters long. Names of the encrypted files are also modified using a special algorithm; for example, once encrypted, the picture.jpg graphics file will look as follows: picture.jpg(!! to decrypt email id 12345678 to sec****@gmail.com !!).exe.

Addresses provided by cybercriminals to their victims can include the following ones:

  • sec777999@gmail.com,
  • sec222555@gmail.com,
  • sec333888@gmail.com,
  • sec333888@gmail.com,
  • ausec222999@gmail.com,
  • sec777999@gmail.com,
  • casec222777@gmail.com,
  • auidhelp@gmail.com,
  • sec777999@gmail.com,
  • sec222555@gmail.com,
  • sec333888@gmail.com,
  • ausec222999@gmail.com,
  • casec222777@gmail.com,
  • auidhelp@gmail.com,
  • usidhelp2@gmail.com,
  • frsechelp@gmail.com,
  • spainsec1@gmail.com,
  • spainsec2@gmail.com.

If your computer has been infected with Trojan.ArchiveLock.20, do not attempt to reinstall the operating system or delete any files, because such actions can result in all the encrypted data being permanently lost. To decrypt the files, contact Doctor Web by submitting a ticket in the Request for Curing category.

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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Download by serial number

  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

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