Win32.HLLW.Autoruner1.29542
Added to the Dr.Web virus database:
2012-11-10
Virus description added:
2012-11-11
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'explorer.exe, c:\msocache\ntldr.exe'
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'FilterCheck' = 'c:\msocache\ntldr.exe'
Creates or modifies the following files:
- %ALLUSERSPROFILE%\Start Menu\Programs\Startup\Disk Cleanup.lnk
Creates the following files on removable media:
- <Drive name for removable media>:\My Videos.lnk
- <Drive name for removable media>:\My Pictures.lnk
- <Drive name for removable media>:\My Music.lnk
Malicious functions:
Creates and executes the following:
- C:\MSOCache\U3Launcher.exe
Executes the following:
- <SYSTEM32>\wscript.exe "C:\MSOCache\bvs.vbe"
Modifies file system :
Creates the following files:
- C:\MSOCache\BVs.VBE
- C:\MSOCache\ntldr.exe
- %TEMP%\ginstall.dll
- C:\MSOCache\U3Launcher.exe
Sets the 'hidden' attribute to the following files:
- C:\ntldr.exe
- C:\MSOCache\ntldr.exe
Deletes the following files:
- C:\MSOCache\BVs.VBE
- %TEMP%\ginstall.dll
Miscellaneous:
Searches for the following windows:
- ClassName: 'CabinetWClass' WindowName: ''
- ClassName: '' WindowName: 'Task Manager Warning'
- ClassName: '' WindowName: '3.5 Floppy (A:)'
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