W32.Tasnab

1. Copies itself as the following files:
   
   
   • %UserProfile%\Application Data\[CURRENT USER NAME].exe
   • %UserProfile%\Application Data\taliban.exe
     
     Note: %UserProfile% is a variable that refers to the current user's profile folder. By default, this is C:\Documents and Settings\[CURRENT USER] (Windows NT/2000/XP).
     
     
2. Copies itself to the current folder and any folders accessed on drives A to Z, using one of the following names:
   
   
   • [RANDOM]Cinta Untuk Siti .exe
   • [RANDOM]Yakin Radja Band .exe
   • [RANDOM]Karena Wanita Ingin Dimengerti Ada Band .exe
   • [RANDOM]Cerita Dian Sastrowardoyo .exe
   • [RANDOM]Tutor Sex .exe
   • [RANDOM]Binalnya Tante Yenni .exe
   • [RANDOM]Cerita Malam Pertama .exe
   • [RANDOM]MyHeart Irwansyah Acha .exe
   • [RANDOM]Misteri Vagina .exe
   • [RANDOM]Pecinta Wanita Irwansyah .exe
   • [RANDOM]Sex dan Remaja .exe
   • [RANDOM]Pelajaran Sex .exe
   • [RANDOM]Dealova Once .exe
   • [RANDOM]Tokoh - tokoh dunia yang maniak sex .exe
   • [RANDOM]Pengalaman melihat kuntilanak .exe
   • [RANDOM]Surat cintaku .exe
   • [RANDOM]Surat penolakan cinta .exe
   • [RANDOM]Akte kelahiran .exe
   • [RANDOM]Perjanjian Setan .exe
   • [RANDOM]Syair Cinta Khalil Gibran .exe
   • [RANDOM]Lagu Kenangan Koes Plus .exe
   • [RANDOM]Daftar Koruptor .exe
   • [RANDOM]Cinta Buka Disini .exe
   • [RANDOM]Jangan Ah Malu .exe
   • [RANDOM]Surat Cintaku Yang Pertama .exe
   • [RANDOM]Unsur2x Vagina .exe
   • [RANDOM]Unsur2x Penis .exe
   • [RANDOM]Perbedaan Wanita dan Pria .exe
   • [RANDOM]Perjanjian Cinta .exe
   • [RANDOM]Tak ada perjanjian dalam cinta .exe
   • [RANDOM]Cinderela temukan sang Pangeran .exe
   • [RANDOM]Makalah A Einsten .exe
   • [RANDOM]Cerita Sex Untuk Anak Perempuan .exe
   • [RANDOM]Ah Sakit Bang .exe
   • [RANDOM]Taklukan Hati Perempuan .exe
   • [RANDOM]Hancurkan Keteguhan Laki laki .exe
   • [RANDOM]Lembutnya Hati Wanita .exe
   • [RANDOM]Cinta Wanita .exe
   • [RANDOM]Baca ini jika mencintaiku .exe
   • [RANDOM]Bias bias cinta .exe
   • [RANDOM]Jangan khianati aku .exe
   • [RANDOM]Lamaran Pekerjaan .exe
   • [RANDOM]Daftar Riwayat Hidup .exe
   • [RANDOM]Perjalanan Hidup Pelacur Jalanan .exe
   • [RANDOM]Surga Atau Neraka .exe
   • [RANDOM]Rahasia Pribadi .exe
   • [RANDOM]* .exe
   • [RANDOM]Proposal Miss Universe .exe
   • [RANDOM]Miss Universe VS FPI .exe
   • [RANDOM]Pendaftaran Miss Universe .exe
   • [RANDOM]Kumpulan Lagu Ungu .exe
   • [RANDOM]Naluri Lelaki Samson .exe
   • [RANDOM]Green Day Basket Case .exe
   • [RANDOM]Green Day Insomniac .exe
   • [RANDOM]Kumpulan Album Naff .exe
   • [RANDOM]The Best Of Peter Pan .exe
   • [RANDOM]The Best Of Dewa 19 .exe
   • [RANDOM]Rahasia Wanita .exe
   • [RANDOM]Pengalaman Sexku .exe
   • [RANDOM]Aku Kamu dan Dia .exe
   • [RANDOM]Lagu lagu Radja 2006 .exe
   • [RANDOM]My-Heart .exe
   • [RANDOM]Daya Magis Vagina .exe
   • [RANDOM]Cara menjadi kaya .exe
   • [RANDOM]Perwujudan Setan .exe
   • [RANDOM]New Folder .exe
   • [RANDOM]Kirana dalam cinta .exe
   • [RANDOM]Maukah kau jadi pacarku .exe
   • [RANDOM]Drain You Nirvana .exe
   • [RANDOM]Smell Like Teen Spirit Nirvana .exe
   • [RANDOM]Betapa Cintaku .exe
   • [RANDOM]Besarnya Cinta .exe
   • [RANDOM]Buku Harianku .exe
   • [RANDOM]Jadikan Aku Sephiamu .exe
   • [RANDOM]Surat Untuk Emi .exe
   • [RANDOM]Surat Untuk Eni .exe
   • [RANDOM]Surat Untuk Lydia .exe
   • [RANDOM]Surat Untuk Tania .exe
   • [RANDOM]Surat Untuk Ani .exe
   • [RANDOM]Cintanya Siti .exe
   • [RANDOM]Siti Cinta Pertama .exe
   • [RANDOM]Siti Haryani Cinta Pertama .exe
   • [RANDOM]Siti H Pacarku .exe
   • [RANDOM]Kenanganku Terindah .exe
   • [RANDOM]Kisah Cinta Terlucu .exe
   • [RANDOM]Penghianatan Dian S .exe
   • [RANDOM]Inilah Aku .exe
   • [RANDOM]Inikah Rasanya Cinta .exe
   • [RANDOM]Nikmat Sex Party .exe
   • [RANDOM]Naluri Sex Wanita .exe
   • [RANDOM]Naluri Sex Pria .exe
   • [RANDOM]Nikmat Perselingkuhan .exe
     
     where [RANDOM] is any text entered into the address bar in Windows Explorer.
     
     
3. Adds the value:
   
   "shell" = "%UserProfile%\Application Data\taliban.exe"
   
   to the registry subkey:
   
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
   
   so that it executes when windows starts.
   
   
4. Adds the values:
   
   "[CURRENT USER NAME]_bangst" = "%UserProfile%\Application Data\[CURRENT USER NAME].exe"
   
   to the registry subkey:
   
   HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
   
   so that it executes when Windows starts.
   
   
5. Modifies the values:
   
   "FullPath"= "1"
   "FullPathAddress" = "1"
   
   in the registry subkey:
   
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\CabinetState
   
   
6. Modifies the values:
   
   "Hidden" = "0"
   "HideFileExt" = "0"
   
   in the registry subkey:
   
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced
   
   
7. Modifies the values:
   
   "CheckedValue" = "1"
   "DefaultValue" = "1"
   
   in the registry subkey:
   
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden\SHOWALL
   
   
8. Modifies the values:
   
   "CheckedValue" = "2"
   "DefaultValue" = "2"
   
   in the registry subkey:
   
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden\NOHIDDEN
   
   
9. Modifies the value:
   
   "NoFolderOptions" = "1"
   
   in the registry subkey:
   
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer
   
   
10. Creates the following files:
    
    
    • %System%\oeminfo.ini
    • %System%\oemlogo.bmp
      
      Note: %System% is a variable that refers to the System folder. By default this is C:\Windows\System (Windows 95/98/Me), C:\Winnt\System32 (Windows NT/2000), or C:\Windows\System32 (Windows XP).
      
      
11. Creates the following file:
    
    %UserProfile%\My Documents\As Slam Bey.txt
    
    
12. Opens As Slam Bey.txt with the default text file viewer, displaying the following message:
    
    **************************************************************************
    * Cinta telah menyatukan [REMOVED] nyatukan cinta kita berdua.
    
    Pade[REMOVED]rat 26 September 2006 16:45 wib
    
    A[REMOVED]Y
    
    
13. Monitors windows where their class names match any of the following:
    
    
    • ExploreWClass
    • WorkerA
    • WorkerW
    • ReBarWindow32
    • ComboBoxEx32
    • ComboBox
    • Edit
    • IEFrame
    • Navigation Bar
    • Address Band Root
    • CabinetWClass
    • ata*
    • RegEdit_RegEdit
    • Registry Editor
    • #32770
    • System Configuration Utility
    • ThunderRT6FormDC
    • HijackThis - v1.99.0
    • Tfrmmainstartup
    • Quick StartUp
    • Pocket Killbox 0 Items
    • Show/Kill Running Process
    • Startup Guard - Found New App At Startup !
    • SysListView32
    • Autostart And Process Viewer
    • tty
    • MS-DOS Prompt
    • KILLVB
    • ConsoleWindowClass
    • Command Prompt
    • PROCEXPL
    • TfrmIntegrator
    • TuneUp Utilities
    • iKnowPS
    • CurrProcessClass
    • CurrProcess
    • Run
    • Windows Task Manager
    • Processes
      
      
14. Monitors the Windows Explorer address bar, then duplicates itself with names consisting of the first 3 characters typed in the address bar and one of the above names.
    
    
15. Ends the command prompt and regedit.

Recommendations

Symantec Security Response encourages all users and administrators to adhere to the following basic security "best practices":

• Use a firewall to block all incoming connections from the Internet to services that should not be publicly available. By default, you should deny all incoming connections and only allow services you explicitly want to offer to the outside world.
• Enforce a password policy. Complex passwords make it difficult to crack password files on compromised computers. This helps to prevent or limit damage when a computer is compromised.
• Ensure that programs and users of the computer use the lowest level of privileges necessary to complete a task. When prompted for a root or UAC password, ensure that the program asking for administration-level access is a legitimate application.
• Disable AutoPlay to prevent the automatic launching of executable files on network and removable drives, and disconnect the drives when not required. If write access is not required, enable read-only mode if the option is available.
• Turn off file sharing if not needed. If file sharing is required, use ACLs and password protection to limit access. Disable anonymous access to shared folders. Grant access only to user accounts with strong passwords to folders that must be shared.
• Turn off and remove unnecessary services. By default, many operating systems install auxiliary services that are not critical. These services are avenues of attack. If they are removed, threats have less avenues of attack.
• If a threat exploits one or more network services, disable, or block access to, those services until a patch is applied.
• Always keep your patch levels up-to-date, especially on computers that host public services and are accessible through the firewall, such as HTTP, FTP, mail, and DNS services.
• Configure your email server to block or remove email that contains file attachments that are commonly used to spread threats, such as .vbs, .bat, .exe, .pif and .scr files.
• Isolate compromised computers quickly to prevent threats from spreading further. Perform a forensic analysis and restore the computers using trusted media.
• Train employees not to open attachments unless they are expecting them. Also, do not execute software that is downloaded from the Internet unless it has been scanned for viruses. Simply visiting a compromised Web site can cause infection if certain browser vulnerabilities are not patched.
• If Bluetooth is not required for mobile devices, it should be turned off. If you require its use, ensure that the device's visibility is set to "Hidden" so that it cannot be scanned by other Bluetooth devices. If device pairing must be used, ensure that all devices are set to "Unauthorized", requiring authorization for each connection request. Do not accept applications that are unsigned or sent from unknown sources.
• For further information on the terms used in this document, please refer to the Security Response glossary.