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Trojan.DownLoader11.38325
Added to the Dr.Web virus database:
2014-10-26
Virus description added:
2014-10-26
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '*WindowsMngr' = '"%ALLUSERSPROFILE%\WindowsMngr\svchost.exe"'
[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\mmc.exe] 'Debugger' = 'wuauc'
[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Firewall.cpl] 'Debugger' = 'wuauc'
Changes the following executable system files:
<SYSTEM32>\mmc.exe.Z7W8c
<SYSTEM32>\Firewall.cpl.6651D
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>\wbem\wmiadap.exe' /R /T
'<SYSTEM32>\netsh.exe' firewall set opmode mode=disable profile=all
'<SYSTEM32>\sc.exe' config SharedAccess start= disabled
Modifies file system :
Creates the following files:
<SYSTEM32>\firewall.cpl:Zone.Identifier
<SYSTEM32>\mmc.exe:Zone.Identifier
%ALLUSERSPROFILE%\WindowsMngr\procmon.exe
%TEMP%\nsv2.tmp
%TEMP%\umbels\chervil.xbe
%TEMP%\nsh3.tmp\strongyles.dll
Sets the 'hidden' attribute to the following files:
%ALLUSERSPROFILE%\WindowsMngr\procmon.exe
Deletes the following files:
<SYSTEM32>\QbJfaXVlKgzuquaA
<SYSTEM32>\ohVLYjxLLxQtnjBKew
%TEMP%\nsh3.tmp\strongyles.dll
Moves the following system files:
from <SYSTEM32>\CrpfRemECtYtbYh to <SYSTEM32>\LcRWthVOcWaNTjWjZ
from <SYSTEM32>\mmc.exe.Z7W8c to <SYSTEM32>\CrpfRemECtYtbYh
from <SYSTEM32>\tMDzxdSznRzCPJ to <SYSTEM32>\cUNAYcXiZJQgn
from <SYSTEM32>\LcRWthVOcWaNTjWjZ to <SYSTEM32>\tMDzxdSznRzCPJ
from <SYSTEM32>\mVLmYdUnyHdrLPfKjpGI to <SYSTEM32>\wZJYfqqAnxbhARjdbMbb
from <SYSTEM32>\fWgfJWWCjfRtPHtsAl to <SYSTEM32>\mVLmYdUnyHdrLPfKjpGI
from <SYSTEM32>\mmc.exe to <SYSTEM32>\mmc.exe.Z7W8c
from <SYSTEM32>\wZJYfqqAnxbhARjdbMbb to <SYSTEM32>\ohVLYjxLLxQtnjBKew
from <SYSTEM32>\cUNAYcXiZJQgn to <SYSTEM32>\IiDFEUweveIlaDS
from <SYSTEM32>\YqGjaxPLjMGJN to <SYSTEM32>\ucXhpXMhDkfIvB
from <SYSTEM32>\xxsXYqTysoRfHh to <SYSTEM32>\YqGjaxPLjMGJN
from <SYSTEM32>\RZlkVSvZOIUbVRyN to <SYSTEM32>\QbJfaXVlKgzuquaA
from <SYSTEM32>\ucXhpXMhDkfIvB to <SYSTEM32>\RZlkVSvZOIUbVRyN
from <SYSTEM32>\PzkcFvnZJxuMdUFKn to <SYSTEM32>\eDAJewpiCvHNqJ
from <SYSTEM32>\IiDFEUweveIlaDS to <SYSTEM32>\PzkcFvnZJxuMdUFKn
from <SYSTEM32>\plsWeEAjdaGbarqOw to <SYSTEM32>\xxsXYqTysoRfHh
from <SYSTEM32>\eDAJewpiCvHNqJ to <SYSTEM32>\plsWeEAjdaGbarqOw
from <SYSTEM32>\nGhbrRIYCxQLEgsYFPJK to <SYSTEM32>\APBuLEhdawyGqgMyzdW
from <SYSTEM32>\EaGySixfUTuNLeOrjUq to <SYSTEM32>\nGhbrRIYCxQLEgsYFPJK
from <SYSTEM32>\VitwZRhRCxAMAuhgtOl to <SYSTEM32>\pYGecBbAUwAFoFWqSQ
from <SYSTEM32>\APBuLEhdawyGqgMyzdW to <SYSTEM32>\VitwZRhRCxAMAuhgtOl
from <SYSTEM32>\Firewall.cpl.6651D to <SYSTEM32>\YtYgrGmWvkVGjybaFS
from <SYSTEM32>\firewall.cpl to <SYSTEM32>\Firewall.cpl.6651D
from <SYSTEM32>\ScxiBorObAemLUfahJQ to <SYSTEM32>\EaGySixfUTuNLeOrjUq
from <SYSTEM32>\YtYgrGmWvkVGjybaFS to <SYSTEM32>\ScxiBorObAemLUfahJQ
from <SYSTEM32>\pYGecBbAUwAFoFWqSQ to <SYSTEM32>\phFZPiNWSoIoVdUDPArEYn
from <SYSTEM32>\OMyVNcEmImPmmYszz to <SYSTEM32>\LTpPgPdhiNjBhJNHdLtRT
from <SYSTEM32>\hLplKnlbVWsQWDdBfPclAm to <SYSTEM32>\OMyVNcEmImPmmYszz
from <SYSTEM32>\YzTlAmMMHabsAKhOOn to <SYSTEM32>\fWgfJWWCjfRtPHtsAl
from <SYSTEM32>\LTpPgPdhiNjBhJNHdLtRT to <SYSTEM32>\YzTlAmMMHabsAKhOOn
from <SYSTEM32>\PkzQonytGmnvPDEdbVRfZv to <SYSTEM32>\poHyBCgLflaQWDHTCwGsO
from <SYSTEM32>\phFZPiNWSoIoVdUDPArEYn to <SYSTEM32>\PkzQonytGmnvPDEdbVRfZv
from <SYSTEM32>\PGECfyPcnrazMbveHMu to <SYSTEM32>\hLplKnlbVWsQWDdBfPclAm
from <SYSTEM32>\poHyBCgLflaQWDHTCwGsO to <SYSTEM32>\PGECfyPcnrazMbveHMu
Moves itself:
from <Full path to virus> to %ALLUSERSPROFILE%\WindowsMngr\svchost.exe
Network activity:
Connects to:
TCP:
HTTP POST requests:
www.al###meagaaa.ws/l/page.php
UDP:
DNS ASK www.al###meagaaa.ws
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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