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For remove W32.Tidserv virus,please clean/delete all W32.Tidserv infected files and Delete/Modify any values W32.Tidserv added to the registry as following:
When executed, the worm copies itself as the following file:
%Temp%\tmp[RANDOM CHARACTERS].tmp
It creates the following file, which contains rootkit capabilities:
%Temp%\tmp[RANDOM CHARACTERS].tmp
Note: The worm creates multiple files with the name tmp[RANDOM CHARACTERS].tmp in the %Temp% folder. However, the random characters are different in each instance.
It then copies the above file to the following file:
%System%\dll.dll
It copies the following system file to %Temp%\tmp[RANDOM CHARACTERS].tmp and then modifies it:
%System%\advapi32.dll (detected as Backdoor.Tidserv!inf)
The threat modifies the \KnownDlls\advapi32.dll section object and then restarts the printer spooler service so that the modified advapi32.dll will load the following file:
%System%\dll.dll
The worm then creates the following registry entry:
HKEY_CLASSES_ROOT\msqpdxvx\"msqpdxrun" = "[RANDOM DWORD VALUE]"
Once %System%\dll.dll is executed, it creates the following registry entries:
- HKEY_CLASSES_ROOT\homeview\CLSID\"default" = "{6BF52A52-394A-11D3-B153-00C04F79FAA6}"
- HKEY_CLASSES_ROOT\msqpdxvx\"msqpdxpff" = "[RANDOM DWORD VALUE]"
- HKEY_CLASSES_ROOT\msqpdxvx\"msqpdxaff" = "[RANDOM DWORD VALUE]"
- HKEY_CLASSES_ROOT\msqpdxvx\"msqpdxinfo" = "[RANDOM STRING VALUE]"
- HKEY_CLASSES_ROOT\msqpdxvx\"msqpdxid" = "[RANDOM STRING VALUE]"
- HKEY_CLASSES_ROOT\msqpdxvx\"msqpdxsrv" = "[RANDOM DWORD VALUE]"
- HKEY_CLASSES_ROOT\msqpdxvx\"msqpdxpos" = "[RANDOM STRING VALUE]"
It creates the following event:
TDKP
The worm may creates the following file:
%SystemDrive%\tdl.dat
The worm also spreads by copying itself to all removable drives as the following file:
%DriveLetter%\resycled\boot.com
The worm also creates the following file on all removable drives so that it executes whenever the drive is accessed:
%DriveLetter%\autorun.inf
It then attempts to create an infinite loop to prevent removal using the %DriveLetter%\resycled\boot.com and the %DriveLetter%\autorun.inf files.
The worm then connects to the following remote location:
hs.2-104.zlkon.lv
The worm downloads a file with rootkit capabilities and saves it as the following file:
%System%\drivers\msqpdxserv.sys
It creates the following file with rootkit capabilities:
%System%\drivers\msqpdx[RANDOM CHARACTERS].sys
It creates the following file:
%System%\msqpdx[RANDOM CHARACTERS].dll
The worm uses its rootkit capabilities to hide files and registry keys that have names starting with the following string:
msqpdx
It also hides the following file:
%System%\dll.dll
The worm creates a service with the following characteristics:
Startup Type: Automatic
Image Path = %System%\drivers\msqpdxserv.sys
The worm creates the service by adding entries to the following registry subkey:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\msqpdxserv.sys
It creates the following file:
%Temp%\tempo-[RANDOM CHARACTERS].tmp
It then creates the following file:
%ProgramFiles%\Mozilla Firefox\components\iamfamous.dll
It may create the following temporary files in the %UserProfile%\Local Settings\Temp or %Temp% folders:
The worm may redirect Internet access if the requested URL contains any of the following strings:
- .adrevolver.com
- .akamai.net
- .lbn.ru
- .live.
- .msn.
- .specificclick.net
- .tribalfusion.com
- .yahoo
- .yimg.com
- /results.php?
- /template.dll?
- about.ask.com
- alltheweb.com
- altavista.
- altavista.com
- aport.ru
- ask.com
- ask2.pricegrabber.com
- askcareers.com
- atdmt.com
- atdmt.com
- atwola.
- binoculars1.ask.com
- digitalcity.
- doubleclick.
- everesttech.net
- google
- google-analytics.com
- help.yahoo
- info.yahoo
- iwon.com
- list.ru
- login.yahoo
- loginnet.passport
- mail.ru
- microsoft.com
- my.yahoo
- mystuff.ask.com
- news.ask.com
- newsmedia.teoma.com
- nova.rambler.ru
- o.aolcdn.com
- opselect.com
- overture.
- overture.
- privacy.yahoo
- query=
- readme.ru
- results.asp
- revsci.net
- se.begun.ru
- search.
- search.aol.com
- search.icq.com
- search.live.
- search.msn.
- search.yahoo.
- settings.aspx
- shopping.yahoo.
- sp.ask.com
- teledu.ru
- trafficmp.com
- tribalfusion.com
- www.ask.com
- www.google.
- www.yahoo
- yandex.ru
- yimg.com
- youtube.com
The worm changes the DNS server options to one of the following fixed IPs:
- 85.255.115.156
- 85.255.112.87
- 85.255.115.50
- 85.255.112.154
It may randomly redirect some Internet sites to locations that display advertisements or locations that may steal confidential information.
It may download additional malware on to the compromised computer.
The worm may lower security settings by disabling antivirus software.RecommendationsSymantec 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.
For successful remove W32.Tidserv 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 W32.Tidserv temp file exisit there.
4.If you failed to remove W32.Tidserv,please go to our remove help forum:http://help.antiviruses123.com
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