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Win32.HLLW.Autoruner2.2725
Added to the Dr.Web virus database:
2014-01-24
Virus description added:
2014-01-26
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'lsass' = '%ALLUSERSPROFILE%\Application Data\lsass.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Userinit' = '<SYSTEM32>\userinit.exe <SYSTEM32>\1096\winlogon.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = '%WINDIR%\Explorer.exe %WINDIR%\apps\Microsoft\Applications\Ms-office\Ms-Word\Networking\internet\system32\TangoCharle.exe'
Creates or modifies the following files:
%ALLUSERSPROFILE%\Start Menu\Programs\Startup\<Virus name>.exe
Creates the following services:
[<HKLM>\SYSTEM\ControlSet001\Services\TlntSvr] 'Start' = '00000002'
Creates the following files on removable media:
<Drive name for removable media>:\DonotLook.exe
<Drive name for removable media>:\DjRemixes.exe
<Drive name for removable media>:\facebookpics.exe
<Drive name for removable media>:\TangoCharle.exe
<Drive name for removable media>:\autorun.inf
<Drive name for removable media>:\picnic\picnic.garbage
<Drive name for removable media>:\Games\Games.garbage
<Drive name for removable media>:\mig33.exe
<Drive name for removable media>:\Games\MiniclipGames.exe
<Drive name for removable media>:\picnic\videos.exe
<Drive name for removable media>:\picnic\photos.exe
<Drive name for removable media>:\Games\flashGames.exe
<Drive name for removable media>:\Songs.exe
<Drive name for removable media>:\Games.exe
<Drive name for removable media>:\<Virus name>.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '<SYSTEM32>\tlntsvr.exe' = '<SYSTEM32>\tlntsvr.exe:*:Enabled:iexplorer'
Executes the following:
'<SYSTEM32>\sc.exe' start tlntsvr
'<SYSTEM32>\netsh.exe' firewall set allowedprogram <SYSTEM32>\tlntsvr.exe iexplorer enable
'<SYSTEM32>\regsvr32.exe' /s <SYSTEM32>\tlntsvrp.dll
'<SYSTEM32>\tlntsvr.exe'
'<SYSTEM32>\net1.exe' localgroup %USERNAME%s Redbull /add
'<SYSTEM32>\net1.exe' user Redbull 123456789 /add
'<SYSTEM32>\sc.exe' config tlntsvr start= auto
'<SYSTEM32>\net1.exe' localgroup 'remote desktop users' Redbull /add
Modifies file system :
Creates the following files:
C:\Drivers.exe
%WINDIR%.exe
<SYSTEM32>\NT.txt
C:\ProgramFiles.exe
%WINDIR%\apps\Microsoft\Applications\Ms-office\Ms-Word\Networking\internet\system32\TangoCharle.exe
%TEMP%\aut1.tmp
%ALLUSERSPROFILE%\Application Data\lsass.exe
<SYSTEM32>\1096\winlogon.exe
Sets the 'hidden' attribute to the following files:
<Drive name for removable media>:\<Virus name>.exe
<Drive name for removable media>:\autorun.inf
Deletes the following files:
Miscellaneous:
Searches for the following windows:
ClassName: 'Shell_TrayWnd' WindowName: '(null)'
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