Win32.HLLW.Autoruner1.28655
Added to the Dr.Web virus database:
2012-10-25
Virus description added:
2012-10-25
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'WinScript' = '<SYSTEM32>\NtLogon.exe'
Creates the following files on removable media:
- <Drive name for removable media>:\Autorun.inf
Malicious functions:
To complicate detection of its presence in the operating system,
blocks execution of the following system utilities:
- Windows Task Manager (Taskmgr)
- Registry Editor (RegEdit)
Executes the following:
- <SYSTEM32>\reg.exe add "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer" /v NoMultiIE /t REG_DWORD /d 1 /f
- <SYSTEM32>\reg.exe add "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer" /v NofolderOptions /t REG_DWORD /d 1 /f
- <SYSTEM32>\reg.exe add "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer" /v NoRun /t REG_DWORD /d 1 /f
- <SYSTEM32>\reg.exe add "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run" /v WinScript /t REG_SZ /d <SYSTEM32>\NtLogon.exe /f
- <SYSTEM32>\reg.exe add "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer" /v NoControlPanel /t REG_DWORD /d 1 /f
- <SYSTEM32>\reg.exe add "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System" /v NoDispCPL /t REG_DWORD /d 1 /f
- <SYSTEM32>\cmd.exe /c ""<SYSTEM32>\NtScript.bat" "
- <SYSTEM32>\reg.exe add "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System" /v DisableTaskMgr /t REG_DWORD /d 1 /f
- <SYSTEM32>\reg.exe add "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System" /v DisableClock /t REG_DWORD /d 1 /f
- <SYSTEM32>\reg.exe add "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System" /v DisableRegistryTools /t REG_DWORD /d 1 /f
Modifies settings of Windows Explorer:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoControlPanel' = '00000001'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoRun' = '00000001'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NofolderOptions' = '00000001'
Modifies file system :
Creates the following files:
- <SYSTEM32>\NtScript.bat
- C:\Autorun.inf
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\Autorun.inf
- C:\Autorun.inf
Deletes the following files:
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: ''
- ClassName: 'Shell_TrayWnd' WindowName: ''
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