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Bibliothèque virale

Descriptions de virus

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TECHNOLOGIES

TERMINOLOGIE

COURS ET EDU

MYTHES

Mythes sur les antivirus

Actualités

Win32.VirLock.10

Added to the Dr.Web virus database: 2015-02-18

Virus description added: 2015-02-18

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>\reg.exe' add HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /d 0 /t REG_DWORD /f
'<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

Modifies file system :

Creates the following files:

Deletes the following files:

<Current directory>\gUAw.exe
<Current directory>\hcUM.ico
<Current directory>\qEcY.ico
<Current directory>\BkwI.ico
<Current directory>\ZYoa.exe
<Current directory>\koQe.exe
<Current directory>\nIEI.exe
<Current directory>\Pqsk.ico
<Current directory>\rmow.ico
<Current directory>\iYQM.ico
<Current directory>\iYci.exe
<Current directory>\SYYi.exe
<Current directory>\qgsc.exe
<Current directory>\LosM.ico
<Current directory>\zMkQ.ico
%TEMP%\ZyAoUAMU.bat
<Current directory>\fAIE.exe
<Current directory>\cUMo.exe
<Current directory>\HooS.exe
<Current directory>\rOwI.ico
<Current directory>\aWcw.ico
<Current directory>\ZEwE.ico
<Current directory>\lgYu.exe

Moves the following files:

from C:\RCX8.tmp to <Current directory>\gUAw.exe
from C:\RCX7.tmp to <Current directory>\ZYoa.exe
from C:\RCX9.tmp to <Current directory>\koQe.exe
from C:\RCXB.tmp to <Current directory>\nIEI.exe
from C:\RCXA.tmp to <Current directory>\iYci.exe
from C:\RCX6.tmp to <Current directory>\SYYi.exe
from C:\RCX2.tmp to <Current directory>\qgsc.exe
from C:\RCX1.tmp to <Current directory>\fAIE.exe
from C:\RCX3.tmp to <Current directory>\cUMo.exe
from C:\RCX5.tmp to <Current directory>\HooS.exe
from C:\RCX4.tmp to <Current directory>\lgYu.exe

Network activity:

Connects to:

'bl##k.io':443

UDP:

DNS ASK google.com
DNS ASK bl##k.io

Miscellaneous:

Searches for the following windows:

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