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Tuesday, 18 January 2005 |
Backdoor.Lateda.B is a back door Trojan horse program that allows a remote attacker to download and execute files onto a compromised computer.
Type: Trojan Horse
Infection Length: 13,948 bytes
Systems Affected: Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows XP
When Backdoor.Lateda.B is executed, it performs the following actions:
Creates the following copy of itself:
%Windir%msdevmgr32.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:
"Microsoft Device Manager" = "%Windir%msdevmgr32.exe"
to the registry subkey:
HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionRun
so that it is run every time Windows starts.
Connects to an IRC server on the domain xpsgamemail.gotdns.com through TCP port 6667, and joins the channel ##rofl.
Opens a back door on TCP port 9999, and waits for commands from a remote attacker to perform some of the following actions:
Download and execute files
Delete files
Uninstall the back door
Download and install updates to the back door
Perform a denial of service attack on a third party
Capture screenshots
Capture images from a webcam
Log keystrokes
Scan for SQL servers with open sa accounts
Scan for computers vulnerable to the Microsoft IIS and PWS Extended Unicode Directory Traversal Vulnerability (as described in the MS00-078 )
Creates a mutex named "winsockdevice32", so that only one copy of the Trojan will run at one time.
Symantec Security Response encourages all users and administrators to adhere to the following basic security "best practices":
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.
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