W32.Pahatia.A

1. Copies itself as the following files:
   
   
   • C:\Documents and Settings\All Users\Desktop\My Documents.exe
   • C:\Documents and Settings\All Users\Start Menu\Programs\My Documents.exe
   • C:\Program Files\Microsoft Office\Temp.exe
   • C:\WINDOWS\security\krnl32.bat
   • C:\WINDOWS\system\Aku Bisa Tanpamu.exe
   • C:\WINDOWS\system\Aku Kecewa.exe
   • C:\WINDOWS\system\Dibalas Dengan Dusta.exe
   • C:\WINDOWS\system\ISASS.exe
   • C:\WINDOWS\system\Kau Pikir Kaulah Segalanya.exe
   • C:\WINDOWS\system\LNETINFO.exe
   • C:\WINDOWS\system\mr.abram's.exe
   • C:\WINDOWS\system\Sejauh Mungkin.exe
   • C:\WINDOWS\system\Tak Seperti Dulu.exe
   • C:\WINDOWS\system\Viva Elektro.exe
   • C:\WINDOWS\system32\Patah_0[RANDOM].exe
   • C:\WINDOWS\hkcmd.exe
   • C:\WINDOWS\system.exe
     
     Note: The file paths are hard-coded in the worm and do not change between operating systems.
     
     
2. Attempts to copy itself as Data [COMPUTER NAME].exe to the following folder and drives:
   
   
   • %UserProfile%\My Documents
   • D:
   • E:
   • F:
   • G:
   • H:
   • I:
   • J:
   • K:
   • L:
   • M:
   • N:
   • Z:\
     
     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).
     
     
3. Searches the subfolder of %UserProfile%\My Documents, and then copies itself as [FOLDER NAME].exe.
   
   
4. Creates the following text file as an infection marker:
   
   C:\Patah Hati.txt
   
   
5. Copies itself as the following file so that it runs every time Windows starts:
   
   C:\Documents and Settings\All Users\Start Menu\Programs\Startup\system startup.pif
   
   
6. Adds the values:
   
   "Patah Hati" = "C:\WINDOWS\system\ISASS.exe"
   "user logon" = "C:\WINDOWS\Help\user logon.exe"
   
   to the registry subkey:
   
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
   
   so that it runs every time Windows starts.
   
   
7. Adds the value:
   
   "HotKeysCmds" = "C:\WINDOWS\hkcmd.exe"
   
   to the registry subkey:
   
   HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
   
   so that it runs every time Windows starts.
   
   
8. Adds the value:
   
   "Shell" = "Explorer.exe "C:\Program Files\Microsoft Office\Temp.exe""
   
   to the registry subkey:
   
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
   
   so that it runs every time Windows starts.
   
   
9. Adds the value:
   
   "NoFind" = "1"
   
   to the registry subkey:
   
   HKEY_CURRENT_USER\Software\Policies\Microsoft\CurrentVersion\Policies\Explorer
   
   to disable access to the Search function.
   
   
10. Adds the values:
    
    "NoRun" = "1"
    "NoFolderOptions" = "1"
    
    to the registry subkey:
    
    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
    
    to disable access to the Run function and to prevent the user from modifying folder options.
    
    
11. Modifies the values:
    
    "DisableTaskMgr" = "1"
    "DisableCMD" = "1"
    "DisableRegistryTools" = "1"
    
    in the registry subkey:
    
    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System
    
    to disable the Windows Task Manager, Command prompt, and Registry Editor.
    
    
12. Modifies the values:
    
    "HideFileExt" = "1"
    "Hidden" = "2"
    
    in the registry subkey:
    
    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
    
    to hide the file extensions.
    
    
13. Adds the value:
    
    "RegisteredOrganization" = "mr.abram's"
    
    to the registry subkey:
    
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion
    
    
14. Attempts to restart the compromised computer if it detects that the following programs are running:
    
    
    • msconfig.exe
    • regedit.exe
    • taskmgr.exe
    • cmd.exe
    • ntvdm.exe
    • setup.exe
    • x-raypc.exe
    • rx box.exe
    • processxp.exe
    • hijackthis.exe
    • sysmech6.exe
    • integrator.exe
    • rstrui.exe
    • mmc.exe
    • winamp.exe

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.