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For remove Trojan.Trafbrush virus,please clean/delete all Trojan.Trafbrush infected files and Delete/Modify any values Trojan.Trafbrush added to the registry as following:
When executed, the Trojan copies itself as the following files:
- %UserProfile%\Local Settings\Temp\271.exe
- %UserProfile%\Local Settings\Temp\v22.exe
- %UserProfile%\Local Settings\Temp\nop.exe
- %System%\drivers\[SIX RANDOM LETTERS][TWO RANDOM NUMBERS].sys
- %System%\[SIX RANDOM LETTERS][TWO RANDOM NUMBERS].dll
- %System%\[SIX RANDOM LETTERS][TWO RANDOM NUMBERS].dll
The Trojan also drops the following non-malicious files:
- %System%\licon.dat
- %System%\config_brush_ini
- %System%\ctl
- %System%\cwebpage.dll
- %System%\eilsoe.phd
- %System%\list.dic
- %System%\[SIX RANDOM LETTERS][TWO RANDOM NUMBERS].dllmmc.pkm
- %Windir%\fn[RANDOM NUMBERS].log
- %Windir%\system\DVL
It may also drop the following file:
%System%\catclogd.dll
The Trojan creates the following registry entries to register itself as a system service:
- HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\[SIX RANDOM LETTERS][TWO RANDOM NUMBERS]\"ImagePath" = "%System%\drivers\[SIX RANDOM LETTERS][TWO RANDOM NUMBERS].sys"
- HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\[SIX RANDOM LETTERS][TWO RANDOM NUMBERS]\"ImagePath" = "%System%\drivers\[SIX RANDOM LETTERS][TWO RANDOM NUMBERS].sys"
The service has the following characteristics:
Service Name: [SIX RANDOM LETTERS][TWO RANDOM NUMBERS]
Display Name: [SIX RANDOM LETTERS][TWO RANDOM NUMBERS]
Image Path: %System%\drivers\[SIX RANDOM LETTERS][TWO RANDOM NUMBERS].sys
It then creates the following registry subkeys to register itself as a COM object:
- HKEY_CLASSES_ROOT\CLSID\{E157D62A-D8A4-45DF-8E9B-C33D93821BDF}
- HKEY_CLASSES_ROOT\TypeLib\{F54A0656-1D23-4FC1-883E-E68E4CD29566}
- HKEY_CLASSES_ROOT\Interface\{5A1F62AE-0E47-4547-8E5C-AC73FE58C9AE}
Next, the Trojan creates the following registry subkey to register itself as a Browser Helper Object (BHO) for Microsoft Internet Explorer:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{E157D62A-D8A4-45DF-8E9B-C33D93821BDF
The Trojan also creates the following registry subkeys:
- HKEY_CLASSES_ROOT\Brushy.brush.1
- HKEY_CLASSES_ROOT\Brushy.brush
It also creates the following registry entry:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\PendingFileRenameOperations\"SUCCESS" = "%UserProfile%\Local Settings\Temp\v22.exe"
Next, the Trojan attempts to access the following URL:
[http://]d5.huntabc.com.cn/ss2[REMOVED]
It also attempts to contact the following address:
1.mailhunt.cn
The Trojan attempts to download the following configuration files, which contain lists of URLs and search keywords:
The Trojan periodically attempts to access the URLs in the configuration files above using Microsoft Internet Explorer.
The Trojan also attempts to update itself via FTP from the following site:
luckycn.cnRecommendationsSymantec 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.
For successful remove Trojan.Trafbrush virus,you may also need do as following:
1. Temporarily Disable System Restore .
2. Update the virus definitions. Reboot computer in SafeMode;
3. Delete the IE temp files,some Trojan.Trafbrush temp file exisit there.
4.If you failed to remove Trojan.Trafbrush,please go to our remove help forum:http://help.antiviruses123.com
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