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Trojan.Winlock.13697

Added to the Dr.Web virus database: 2016-11-24

Virus description added:

Technical Information

To ensure autorun and distribution:
Creates or modifies the following files:
  • %WINDIR%\Tasks\At1.job
Malicious functions:
Executes the following:
  • '<SYSTEM32>\at.exe' 22:16:00 /every:M,T,W,Th,F,S,Su cmd.exe "/c attrib -H <DRIVERS>\etc\hosts && copy %TEMP%\170546aq <DRIVERS>\etc\hosts /Y && attrib +H <DRIVERS>\etc\hosts"
  • '<SYSTEM32>\ping.exe' -n 6 localhost
  • '<SYSTEM32>\cmd.exe' /c copy <DRIVERS>\etc\hosts <DRIVERS>\etc\hosts.sam /Y && at 22:16:00 /every:M,T,W,Th,F,S,Su cmd.exe "/c attrib -H <DRIVERS>\etc\hosts && copy C:\DOCUME~1\%USERNAME%\LOCALS~1\Temp\170546aq <DRI...
  • '<SYSTEM32>\cmd.exe' /c ping -n 6 localhost && erase "<Full path to file>"
Searches for registry branches where third party applications store passwords:
  • [<HKLM>\SOFTWARE\Robo-FTP 3.7\FTPServers]
  • [<HKCU>\SOFTWARE\Robo-FTP 3.7\Scripts]
  • [<HKCU>\SOFTWARE\Robo-FTP 3.7\FTPServers]
  • [<HKCU>\Software\Microsoft\Internet Explorer\IntelliForms\Storage2]
  • [<HKCU>\Software\FlashPeak\BlazeFtp\Settings]
  • [<HKLM>\Software\SimonTatham\PuTTY\Sessions]
  • [<HKCU>\Software\CoffeeCup Software]
  • [<HKCU>\Software\SimonTatham\PuTTY\Sessions]
  • [<HKLM>\SOFTWARE\Robo-FTP 3.7\Scripts]
  • [<HKCU>\Software\LinasFTP\Site Manager]
  • [<HKLM>\Software\FTPClient\Sites]
  • [<HKCU>\Software\SoftX.org\FTPClient\Sites]
  • [<HKCU>\Software\FTPClient\Sites]
  • [<HKCU>\SOFTWARE\NCH Software\Fling\Accounts]
  • [<HKLM>\SOFTWARE\NCH Software\Fling\Accounts]
  • [<HKCU>\Software\South River Technologies\WebDrive\Connections]
  • [<HKLM>\Software\South River Technologies\WebDrive\Connections]
  • [<HKLM>\Software\Martin Prikryl]
  • [<HKLM>\Software\SoftX.org\FTPClient\Sites]
  • [<HKCU>\Software\Martin Prikryl]
  • [<HKLM>\Software\RIT\The Bat!\Users depot]
  • [<HKCU>\Software\Microsoft\Internet Account Manager\Accounts]
  • [<HKLM>\Software\RIT\The Bat!]
  • [<HKCU>\Software\RIT\The Bat!]
  • [<HKCU>\Software\RIT\The Bat!\Users depot]
  • [<HKCU>\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Microsoft Outlook Internet Settings]
  • [<HKCU>\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook]
  • [<HKCU>\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts]
  • [<HKCU>\Identities\{5518F2FB-DB74-45A3-BEC1-4575D8D9DC84}\Software\Microsoft\Internet Account Manager\Accounts]
  • [<HKLM>\Software\Microsoft\Internet Account Manager]
  • [<HKLM>\Software\Nico Mak Computing\WinZip\FTP]
  • [<HKCU>\Software\Nico Mak Computing\WinZip\mru\jobs]
  • [<HKCU>\Software\Nico Mak Computing\WinZip\FTP]
  • [<HKLM>\Software\CoffeeCup Software]
  • [<HKCU>\Software\MAS-Soft\FTPInfo\Setup]
  • [<HKCU>\Software\RimArts\B2\Settings]
  • [<HKLM>\Software\RimArts\B2\Settings]
  • [<HKCU>\Software\Microsoft\Windows Mail]
  • [<HKLM>\Software\Nico Mak Computing\WinZip\mru\jobs]
  • [<HKCU>\Software\Microsoft\Windows Live Mail]
  • [<HKCU>\Software\GlobalSCAPE\CuteFTP 8 Professional\QCToolbar]
  • [<HKCU>\Software\FlashFXP\3]
  • [<HKCU>\Software\GlobalSCAPE\CuteFTP 8 Home\QCToolbar]
  • [<HKCU>\Software\GlobalSCAPE\CuteFTP 7 Home\QCToolbar]
  • [<HKCU>\Software\GlobalSCAPE\CuteFTP 7 Professional\QCToolbar]
  • [<HKCU>\Software\FileZilla]
  • [<HKCU>\Software\FileZilla Client]
  • [<HKLM>\Software\FlashFXP]
  • [<HKCU>\Software\FlashFXP]
  • [<HKLM>\Software\FlashFXP\3]
  • [<HKCU>\Software\Far Manager\SavedDialogHistory\FTPHost]
  • [<HKCU>\Software\Ghisler\Windows Commander]
  • [<HKCU>\Software\Far2\SavedDialogHistory\FTPHost]
  • [<HKCU>\Software\Far Manager\Plugins\FTP\Hosts]
  • [<HKCU>\Software\Far\SavedDialogHistory\FTPHost]
  • [<HKCU>\Software\GlobalSCAPE\CuteFTP 6 Home\QCToolbar]
  • [<HKCU>\Software\GlobalSCAPE\CuteFTP 6 Professional\QCToolbar]
  • [<HKLM>\Software\Ghisler\Total Commander]
  • [<HKLM>\Software\Ghisler\Windows Commander]
  • [<HKCU>\Software\Ghisler\Total Commander]
  • [<HKCU>\Software\FTP Explorer\FTP Explorer\Workspace\MFCToolBar-224]
  • [<HKCU>\Software\FTP Explorer\Profiles]
  • [<HKCU>\Software\FTPWare\COREFTP\Sites]
  • [<HKCU>\Software\Sota\FFFTP\Options]
  • [<HKCU>\Software\CoffeeCup Software\Internet\Profiles]
  • [<HKLM>\Software\NCH Software\ClassicFTP\FTPAccounts]
  • [<HKCU>\Software\NCH Software\ClassicFTP\FTPAccounts]
  • [<HKCU>\Software\ExpanDrive\Sessions]
  • [<HKCU>\Software\VanDyke\SecureFX]
  • [<HKCU>\Software\Cryer\WebSitePublisher]
  • [<HKCU>\Software\BulletProof Software\BulletProof FTP Client\Main]
  • [<HKCU>\Software\BPFTP\Bullet Proof FTP\Options]
  • [<HKCU>\Software\BPFTP\Bullet Proof FTP\Main]
  • [<HKLM>\Software\FileZilla]
  • [<HKLM>\Software\FileZilla Client]
  • [<HKLM>\Software\TurboFTP]
  • [<HKCU>\Software\Sota\FFFTP]
  • [<HKCU>\Software\TurboFTP]
  • [<HKCU>\Software\BulletProof Software\BulletProof FTP Client\Options]
  • [<HKCU>\Software\BPFTP]
Modifies file system:
Creates the following files:
  • <DRIVERS>\etc\hosts.sam
  • %TEMP%\170546aq
Deletes itself.
Network activity:
Connects to:
  • 'hs###ekjh.info':888
  • 'mj###shki.info':888
  • 'mj###shki.info':4915
UDP:
  • DNS ASK hs###ekjh.info
  • DNS ASK mj###shki.info

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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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.

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