FOR CUSTOMERS

My library

+ Add to library

Search

24/7 Tech support | Rules regarding submitting

Send a message

Call us

+7 (495) 789-45-86

Forum

Your tickets

Total: -
Active: -
Latest: -

Call us

+7 (495) 789-45-86

EN

RU CN DE EN ES FR IT JP KZ UZ PL BY

Support services

Dr.Web vxCube

Sign in to Dr.Web vxCube

VCI investigations

Virus library

Knowledge base

Technologies

Terminology

Training and education

Myths

Myths about anti-viruses

Trojan.DownLoader12.31821

Added to the Dr.Web virus database: 2015-02-25

Virus description added: 2015-02-25

Technical Information

To ensure autorun and distribution:

Modifies the following registry keys:

[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Userinit' = '<SYSTEM32>\userinit.exe,%ALLUSERSPROFILE%\vesswIQA\AcIcUcAM.exe,'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'AcIcUcAM.exe' = '%ALLUSERSPROFILE%\vesswIQA\AcIcUcAM.exe'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'jaQEcQMQ.exe' = '%HOMEPATH%\NIMMEwsg\jaQEcQMQ.exe'

Creates the following services:

[<HKLM>\SYSTEM\ControlSet001\Services\FkYQcQph] 'Start' = '00000002'

Malicious functions:

To complicate detection of its presence in the operating system,

forces the system hide from view:

hidden files
file extensions

blocks the following features:

User Account Control (UAC)

Creates and executes the following:

'%ALLUSERSPROFILE%\lwQggIEM\nwAEcgMA.exe'
'%ALLUSERSPROFILE%\vesswIQA\AcIcUcAM.exe'
'%HOMEPATH%\NIMMEwsg\jaQEcQMQ.exe'

Executes the following:

'<SYSTEM32>\cmd.exe' /c ""%TEMP%\EewIsQkE.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\DskEIoIk.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\fKwskMcg.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\HOUAIUco.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\qOckQggU.bat" "<Full path to virus>""
'<SYSTEM32>\reg.exe' add HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced /f /v Hidden /t REG_DWORD /d 2
'<SYSTEM32>\reg.exe' add HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced /f /v HideFileExt /t REG_DWORD /d 1
'<SYSTEM32>\reg.exe' add HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /d 0 /t REG_DWORD /f
'<SYSTEM32>\cscript.exe' %TEMP%\file.vbs
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\xAEgcIQE.bat" "<Full path to virus>""

Modifies file system :

Creates the following files:

Deletes the following files:

<Current directory>\ywQA.ico
%TEMP%\HakYosoM.bat
<Current directory>\ZsUk.exe
<Current directory>\dwoy.exe
<Current directory>\XyYs.ico
<Current directory>\GosM.exe
<Current directory>\yOkQ.ico
<Current directory>\JYwk.ico
<Current directory>\ngIw.exe
%TEMP%\KoMIsoUo.bat
<Current directory>\zGUw.ico
<Current directory>\ogUs.ico
<Current directory>\xggM.exe
<Current directory>\hIAw.ico
<Current directory>\Tcoy.exe
<Current directory>\dgUU.exe
<Current directory>\ckUu.exe
<Current directory>\uocs.ico
<Current directory>\LwIu.exe
%TEMP%\eAIAIoEY.bat
%TEMP%\SigoAYgM.bat
<Current directory>\nEAa.exe
<Current directory>\maQQ.ico
<Current directory>\pkYg.ico
<Current directory>\pcIi.exe
<Current directory>\UEYQ.ico
%TEMP%\kQEYEIYc.bat
%TEMP%\KSAwsIAc.bat
%TEMP%\aSwAwAII.bat
<Current directory>\Ncwg.exe
<Current directory>\pucM.ico

Moves the following files:

from C:\RCX9.tmp to <Current directory>\ZsUk.exe
from C:\RCX8.tmp to <Current directory>\dwoy.exe
from C:\RCX7.tmp to <Current directory>\GosM.exe
from C:\RCXC.tmp to <Current directory>\ngIw.exe
from C:\RCXB.tmp to <Current directory>\Tcoy.exe
from C:\RCXA.tmp to <Current directory>\xggM.exe
from C:\RCX3.tmp to <Current directory>\LwIu.exe
from C:\RCX2.tmp to <Current directory>\ckUu.exe
from C:\RCX1.tmp to <Current directory>\nEAa.exe
from C:\RCX6.tmp to <Current directory>\dgUU.exe
from C:\RCX5.tmp to <Current directory>\pcIi.exe
from C:\RCX4.tmp to <Current directory>\Ncwg.exe

Network activity:

Connects to:

'74.##5.232.51':80

TCP:

HTTP GET requests:

74.##5.232.51/

UDP:

DNS ASK google.com

Miscellaneous:

Searches for the following windows:

ClassName: '' WindowName: 'Microsoft Windows'
ClassName: '' WindowName: 'jaQEcQMQ.exe'
ClassName: 'Indicator' WindowName: ''
ClassName: '' WindowName: 'AcIcUcAM.exe'

Curing recommendations

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.

Download Dr.Web

Download by serial number

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

Download Dr.Web

Download by serial number

Download on App Store

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

Download Dr.Web

Download by serial number

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

Free trial

14 days

Get it on Google Play