W32.Kiman.B

1. Copies itself as the following file:
   
   %System%\hdcontroller.exe
   
   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).
   
   
2. Adds the value:
   
   "Hard drive Controller" = "hdcontroller.exe"
   
   to the following registry subkeys:
   
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\
   RunServices
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
   
   so that it runs every time Windows starts.
   
   
3. Modifies the value:
   
   "restrictanonymous" = "1"
   
   in the registry subkey:
   
   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa
   
   to prevent NULL session enumeration of the host.
   
   
4. Modifies the value:
   
   "EnableDCOM" = "N"
   
   in the registry subkey:
   
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\OLE
   
   to disable DCOM.
   
   
5. Creates the following files which are used to modify registry keys:
   
   
   • %SystemDrive%\a.bat
   • %Temp%\1.reg
     
     Note: %Temp% is a variable that refers to the Windows temporary folder. By default, this is C:\Windows\TEMP (Windows 95/98/Me/XP) or C:\WINNT\Temp (Windows NT/2000).
     
     
6. Modifies the value:
   
   "TransportBindName" = ""
   
   in the registry subkey:
   
   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\
   NetBT\Parameters
   
   to enable it to spread and to enable its back door functionality.
   
   
7. Modifies the value:
   
   "Start" = "4"
   
   in the registry subkey:
   
   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess
   
   so that it disables the Shared Access service in Windows 2000/XP.
   
   
8. Modifies the value:
   
   "Start" = "4"
   
   in the registry subkeys:
   
   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wuauserv
   HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\wscsvc
   
   to change the system configuration.
   
   
9. Modifies the value:
   
   "EnableRemoteConnect" = "N"
   
   in the registry subkey:
   
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Ole
   
   to change the system configuration.
   
   
10. Modifies the value:
    
    "Enabled" = "0"
    
    in the registry subkey:
    
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\
    SecurityProviders\SCHANNEL\Protocols\PCT1.0\Server
    
    to change the system configuration.
    
    
11. Modifies the values:
    
    "AutoShareServer" = "0"
    "AutoShareWks" = "0"
    
    in the registry subkey:
    
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\
    lanmanserver\parameters
    
    in an attempt to harden system security by removing Administrative shares.
    
    
12. Modifies the values:
    
    "NameServer" = ""
    "ForwardBroadcasts" = "0"
    "IPEnableRouter" = "0"
    "Domain" = ""
    "SearchList" = ""
    "UseDomainNameDevolution" = "1"
    "EnableICMPRedirect" = "0"
    "DeadGWDetectDefault" = "1"
    "DontAddDefaultGatewayDefault" = "0"
    "EnableSecurityFilters" = "1"
    "AllowUnqualifiedQuery" = "0"
    "PrioritizeRecordData" = "1"
    "TCP1320Opts" = "3"
    "KeepAliveTime" = "23280"
    "BcastQueryTimeout" = "2ee"
    "BcastNameQueryCount" = "1"
    
    in the registry subkey:
    
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\
    Parameters
    
    to change the system configuration.
    
    
13. Attempts to open a back door by connecting to an IRC channel through TCP port 443 on the following domain:
    
    enz.fulame.biz
    
    
14. Listens for commands that allow a remote attacker to perform the following actions:
    
    
    • Download and execute files
    • List, stop, and start processes and threads
    • Launch ACK, SYN, UDP, and ICMP Denial of Service (DoS) attacks
    • Perform port redirection
    • Send files over IRC
    • Send email using its own SMTP engine
    • Start a local HTTP, FTP, or TFTP server
    • Search for files on the compromised computer
    • Access network shares and copy itself to those network shares
    • Scan the network for vulnerable hosts by means of port scanning
    • Intercept packets on the local area network
    • Flush the DNS and ARP caches
    • Open a command shell on the infected computer
    • Add and delete network shares and disable DCOM
    • Reboot the infected computer
      
      
15. Scans for computers and attempts to exploit any of the following vulnerabilities:
    
    
    • The Microsoft Windows DCOM RPC Interface Buffer Overrun Vulnerability (as described in Microsoft Security Bulletin MS03-026) using TCP ports 135, 445, 1025.
    • The Microsoft Windows Local Security Authority Service Remote Buffer Overflow (as described in Microsoft Security Bulletin MS04-011) using TCP ports 135, 139, 445.
    • The Microsoft SQL Server 2000 or MSDE 2000 audit (as described in Microsoft Security Bulletin MS02-061) using UDP port 1434.
      
      
16. Attempts to spread by copying itself to network shares protected by weak passwords.

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.