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For remove Trojan.Virantix.C virus,please clean/delete all Trojan.Virantix.C infected files and Delete/Modify any values Trojan.Virantix.C added to the registry as following:
Once executed, the Trojan will restart the compromised computer and display the following warning message:
Title: Your computer is infected!
Message Body:
Windows has detected spyware infection!
It is recomended to use special antispyware tools to prevent data loss. Windows will now download and install the most up-to-date antispyware for you.
Click here to protect your computer from spyware!
It drops the following files:
- %System%\braviax.exe
- %System%\dllcache\figaro.sys
- %CurrentFolder%\delself.bat
- %System%\univrs32.dat
It replaces the following files with the figaro.sys file:
- %Windir%\drivers\beep.sys
- %System%\dllcache\beep.sys
- %System%\drivers\beep.sys
The Trojan creates the following registry entry, so that it runs every time Windows starts:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run\"braviax" = "%System%\braviax.exe"
The Trojan modifies the following registry entries to lower security settings:
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\SecurityCenter\"AntiVirusDisableNotify" = "01000000"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\SecurityCenter\"FirewallDisableNotify" = "01000000"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\SecurityCenter\"UpdatesDisableNotify" = "01000000"
- HKEY_CURRENT_USER\SOFTWARE\Microsoft\SecurityCenter\"AntiVirusDisableNotify" = "01000000"
- HKEY_CURRENT_USER\SOFTWARE\Microsoft\SecurityCenter\"FirewallDisableNotify" = "01000000"
- HKEY_CURRENT_USER\SOFTWARE\Microsoft\SecurityCenter\"UpdatesDisableNotify" = "01000000"
- HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall" = "00000000"
It modifies the following registry entries to change internet settings:
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\InternetSettings\Zones\0\"1200" = "00000000"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\InternetSettings\Zones\0\"1201" = "00000000"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\InternetSettings\Zones\0\"1208" = "00000000"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\InternetSettings\Zones\0\"1608" = "00000000"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\InternetSettings\Zones\0\"1804" = "01000000"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\InternetSettings\Zones\0\"2500" = "03000000"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\InternetSettings\Zones\1\"1200" = "00000000"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\InternetSettings\Zones\1\"1201" = "00000000"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\InternetSettings\Zones\1\"1208" = "00000000"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\InternetSettings\Zones\1\"1608" = "00000000"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\InternetSettings\Zones\1\"1804" = "01000000"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\InternetSettings\Zones\1\"2500" = "03000000"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\InternetSettings\Zones\2\"1200" = "00000000"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\InternetSettings\Zones\2\"1201" = "00000000"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\InternetSettings\Zones\2\"1208" = "00000000"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\InternetSettings\Zones\2\"1608" = "00000000"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\InternetSettings\Zones\2\"1804" = "01000000"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\InternetSettings\Zones\2\"2500" = "03000000"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\InternetSettings\Zones\3\"1200" = "00000000"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\InternetSettings\Zones\3\"1201" = "00000000"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\InternetSettings\Zones\3\"1208" = "00000000"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\InternetSettings\Zones\3\"1608" = "00000000"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\InternetSettings\Zones\3\"1804" = "01000000"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\InternetSettings\Zones\3\"2500" = "03000000"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\InternetSettings\Zones\4\"1200" = "00000000"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\InternetSettings\Zones\4\"1201" = "00000000"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\InternetSettings\Zones\4\"1208" = "00000000"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\InternetSettings\Zones\4\"1608" = "00000000"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\InternetSettings\Zones\4\"1804" = "01000000"
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\InternetSettings\Zones\4\"2500" = "03000000"
It modifies the following registry entries:
- HKEY_CURRENT_USER\Software\Microsoft\InternetExplorer\Main\"EnableBrowserExtensions" = "yes"
- HKEY_CURRENT_USER\Software\Microsoft\InternetExplorer\Main\"SearchBar" = "http://www.google.ie"
- HKEY_CURRENT_USER\Software\Microsoft\InternetExplorer\Main\"SearchPage" = "http://www.google.com"
- HKEY_CURRENT_USER\Software\Microsoft\InternetExplorer\Main\"StartPage" = "http://www.google.com"
- HKEY_LOCAL_MACHINE\Software\Microsoft\InternetExplorer\Main\"Default_Search_URL" = "http://www.google.ie"
- HKEY_LOCAL_MACHINE\Software\Microsoft\InternetExplorer\Main\"SearchPage" = "http://www.google.com"
- HKEY_LOCAL_MACHINE\Software\Microsoft\InternetExplorer\Main\"StartPage" = "http://www.google.com"
- HKEY_LOCAL_MACHINE\Software\Microsoft\InternetExplorer\Search\"SearchAssistant" = "http://www.google.com"
The Trojan then contacts the following remote location and attempts to download and execute a misleading application:
[http://]www.softcashier.com/members/link[REMOVED]
At the time of writing, the application was WinReanimator.RecommendationsSymantec 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.Virantix.C 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.Virantix.C temp file exisit there.
4.If you failed to remove Trojan.Virantix.C,please go to our remove help forum:http://help.antiviruses123.com
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