W32.Opanki.D

Type:  Worm
Infection Length:  213,504 bytes 
 
Systems Affected:  Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows XP
When W32.Opanki.D is executed, it performs the following actions:

Technical Details:

Copies itself as the following file:

%Windir%itunes.exe

Note: %Windir% is a variable that refers to the Windows installation folder. By default, this is C:Windows or C:Winnt.

Adds the value:

"Itunes" = "%Windir%itunes.exe"

to the registry subkeys:

HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionRun
HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionWinlogon

so that the risk runs every time Windows starts.

Attempts to connect to a remote attacker on the IRC channel #fate on xyz.legi0n.net on TCP port 4888.

Downloads and executes a malicious file, if a successful connection is made.

Sends the following message through AOL Instant Messenger:

this picture never gets old

Note: The string "old" is a link to the following fake URL that may download a malicious file:
[http://]www.ebaumsworld.com/[REMOVED]newstuff/funnysign.jpg

Recommendations:

• Turn off and remove unneeded services. By default, many operating systems install auxiliary services that are not critical, such as an FTP server, telnet, and a Web server. These services are avenues of attack. If they are removed, blended threats have less avenues of attack and you have fewer services to maintain through patch updates.
• If a blended 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 (for example, all Windows-based computers should have the current Service Pack installed.). Additionally, please apply any security updates that are mentioned in this writeup, in trusted Security Bulletins, or on vendor Web sites.
• 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.
  Configure your email server to block or remove email that contains file attachments that are commonly used to spread viruses, such as .vbs, .bat, .exe, .pif and .scr files.
• Isolate infected computers quickly to prevent further compromising your organization. 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.