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Trojan.DownLoader12.20313
Added to the Dr.Web virus database:
2015-02-07
Virus description added:
2015-02-07
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '*WindowsMnger' = '"%ALLUSERSPROFILE%\WindowsMnger\dwm.exe"'
[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\mmc.exe] 'Debugger' = 'wuauclt.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Firewall.cpl] 'Debugger' = 'wuauclt.exe'
Changes the following executable system files:
<SYSTEM32>\mmc.exe.7C0Ge
<SYSTEM32>\Firewall.cpl.7YBf6
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'EnableFirewall' = '00000000'
[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DoNotAllowExceptions' = '00000000'
[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile] 'EnableFirewall' = '00000000'
[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile] 'DoNotAllowExceptions' = '00000000'
To complicate detection of its presence in the operating system,
forces the system hide from view:
Executes the following:
'<SYSTEM32>\netsh.exe' firewall set opmode mode=disable profile=all
'<SYSTEM32>\sc.exe' config SharedAccess start= disabled
Modifies file system :
Creates the following files:
%ALLUSERSPROFILE%\WindowsMnger\dwm.exe
%ALLUSERSPROFILE%\WindowsMnger\btplayerctrl.exe
<SYSTEM32>\mmc.exe:Zone.Identifier
%APPDATA%\demographer.j
<SYSTEM32>\firewall.cpl:Zone.Identifier
Sets the 'hidden' attribute to the following files:
%ALLUSERSPROFILE%\WindowsMnger\btplayerctrl.exe
Deletes the following files:
<SYSTEM32>\PpNdzPhazrDLUs
<SYSTEM32>\gIakSBMDNRwofmiEkQlu
Moves the following system files:
from <SYSTEM32>\JAGfhUSdZsgBP to <SYSTEM32>\DZOsmxiBvJXzeK
from <SYSTEM32>\qoSVGoQoISgnp to <SYSTEM32>\JAGfhUSdZsgBP
from <SYSTEM32>\FEoYUdRQnrZLERW to <SYSTEM32>\cqwVRxFDcwMtDrl
from <SYSTEM32>\DZOsmxiBvJXzeK to <SYSTEM32>\FEoYUdRQnrZLERW
from <SYSTEM32>\EKbeidyzkqLOwpvuL to <SYSTEM32>\qoSVGoQoISgnp
from <SYSTEM32>\mmc.exe.7C0Ge to <SYSTEM32>\HlihPafopjBYtG
from <SYSTEM32>\mmc.exe to <SYSTEM32>\mmc.exe.7C0Ge
from <SYSTEM32>\JUbJhqFvYldbbInq to <SYSTEM32>\EKbeidyzkqLOwpvuL
from <SYSTEM32>\HlihPafopjBYtG to <SYSTEM32>\JUbJhqFvYldbbInq
from <SYSTEM32>\cqwVRxFDcwMtDrl to <SYSTEM32>\IGHdHPAFYqlsq
from <SYSTEM32>\atjhOcvEuJHtQWDX to <SYSTEM32>\bRFBUxXxsMPrK
from <SYSTEM32>\XjETzYeTxGGxjBrw to <SYSTEM32>\atjhOcvEuJHtQWDX
from <SYSTEM32>\hREewMORdcnZnl to <SYSTEM32>\PpNdzPhazrDLUs
from <SYSTEM32>\bRFBUxXxsMPrK to <SYSTEM32>\hREewMORdcnZnl
from <SYSTEM32>\TYLNiygNeEFmrgA to <SYSTEM32>\XjETzYeTxGGxjBrw
from <SYSTEM32>\ENDQjYloojabJyn to <SYSTEM32>\yhwurqOAzpVFeDi
from <SYSTEM32>\IGHdHPAFYqlsq to <SYSTEM32>\ENDQjYloojabJyn
from <SYSTEM32>\HqDGhwgGhlDBtk to <SYSTEM32>\TYLNiygNeEFmrgA
from <SYSTEM32>\yhwurqOAzpVFeDi to <SYSTEM32>\HqDGhwgGhlDBtk
from <SYSTEM32>\nEXveknObjoWulVKeJ to <SYSTEM32>\jxDeYuqRRKwjkRWglljRIL
from <SYSTEM32>\VJJPkEaKFYVATzwtUII to <SYSTEM32>\nEXveknObjoWulVKeJ
from <SYSTEM32>\lNmpLrbobmIxZDgJczMVE to <SYSTEM32>\XrzVCPxyonnSISFAWJcmN
from <SYSTEM32>\jxDeYuqRRKwjkRWglljRIL to <SYSTEM32>\lNmpLrbobmIxZDgJczMVE
from <SYSTEM32>\PbScJEivKiqiRIHKqbi to <SYSTEM32>\VJJPkEaKFYVATzwtUII
from <SYSTEM32>\Firewall.cpl.7YBf6 to <SYSTEM32>\qomolCeqUZPzPHCmyWZI
from <SYSTEM32>\firewall.cpl to <SYSTEM32>\Firewall.cpl.7YBf6
from <SYSTEM32>\DykdLyypBHDzIJhFhZ to <SYSTEM32>\PbScJEivKiqiRIHKqbi
from <SYSTEM32>\qomolCeqUZPzPHCmyWZI to <SYSTEM32>\DykdLyypBHDzIJhFhZ
from <SYSTEM32>\XrzVCPxyonnSISFAWJcmN to <SYSTEM32>\qGVwNAScZSvCtHSAYR
from <SYSTEM32>\bZGrCQXkIgrgnRVNZlRDtG to <SYSTEM32>\MKbdljivpYCMjfKUOczF
from <SYSTEM32>\JNWOnySmlDWbitPuBipr to <SYSTEM32>\bZGrCQXkIgrgnRVNZlRDtG
from <SYSTEM32>\aqKaRSiMmkXhdmtxtK to <SYSTEM32>\gIakSBMDNRwofmiEkQlu
from <SYSTEM32>\MKbdljivpYCMjfKUOczF to <SYSTEM32>\aqKaRSiMmkXhdmtxtK
from <SYSTEM32>\OEraXkUQcsORJCKQHIw to <SYSTEM32>\JNWOnySmlDWbitPuBipr
from <SYSTEM32>\CMyjhEHtOCec{AoPqAZuKA to <SYSTEM32>\HtcRyGAHMHWaTkZJYPuvm
from <SYSTEM32>\qGVwNAScZSvCtHSAYR to <SYSTEM32>\CMyjhEHtOCec{AoPqAZuKA
from <SYSTEM32>\GbMLjexAcDOXKiSzDqEV to <SYSTEM32>\OEraXkUQcsORJCKQHIw
from <SYSTEM32>\HtcRyGAHMHWaTkZJYPuvm to <SYSTEM32>\GbMLjexAcDOXKiSzDqEV
Moves itself:
from <Full path to virus> to %ALLUSERSPROFILE%\WindowsMnger\dwm.exe
Miscellaneous:
Searches for the following windows:
ClassName: 'Shell_TrayWnd' WindowName: ''
Curing recommendations
Windows
macOS
Linux
Android
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.
Use Dr.Web Anti-virus for macOS to run a full scan of your Mac.
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;
Switch off your device and turn it on as normal.
Find out more about Dr.Web for Android
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