How I removed W32 NOPIR C

I had a big problem till today.(OS:XP PRO SP2.)I got the w32/Nopir C.I don`t know why,but the Virusscan was not discovered it.Neither NOD32,Neither ZoneAlarm.I downloaded that famous CloneCD with EmulePlus.CloneCD archive file was infected with virus above.I couldn`t find anything about it exept on symantec site: W32.Nopir.C Discovered on: June 04, 2005 Last Updated on: June 06, 2005 03:53:56 PM W32.Nopir.C is a worm that attempts to spread through file sharing applications such as eMule, Kazaa, Morpheus, and Gnucleus. The worm lowers security settings and deletes .MP3, .AVI, .MPG, .MPEG, and .RAR files. Also Known As: W32/Nopir-B [Sophos], Nopir.A [Panda], WORM_NOPIR.B [Trend] Type: Worm Infection Length: 156,658 bytes Wild Number of infections: 0 - 49 Number of sites: 0 - 2 Geographical distribution: Low Threat containment: Easy Removal: Easy Threat Metrics Damage Payload Trigger: Upon execution Payload: Lowers security settings. Large scale e-mailing: n/a Deletes files: Deletes .MP3, .AVI, .MPG, .MPEG and .RAR files Modifies files: n/a Degrades performance: n/a Causes system instability: n/a Releases confidential info: n/a Compromises security settings: Disables Task Manager, Registry Editor, Control Panel, Windows Firewall, and Windows AutoUpdate Distribution Subject of email: n/a Name of attachment: n/a Size of attachment: n/a Time stamp of attachment: n/a Ports: n/a Shared drives: n/a Target of infection: Attempts to spread via file-sharing applications. When W32.Nopir.C is executed, it performs the following actions: Copies itself as the following files: %ProgramFiles%\system prot\mmsete.exe %ProgramFiles%\Outlook Express.sav\outlookrem.exe Note: %ProgramFiles% is a variable that refers to the program files folder. By default, this is C:\Program Files. Copies itself to the following folders, if they exist: %ProgramFiles%\eMule\Incoming\CloneDVD.v2.8.2.1.Cracked-RES.by.Grease.exe %ProgramFiles%\Kazaa\My Shared Folder\CloneDVD.v2.8.2.1.Cracked-RES.by.Grease.exe %ProgramFiles%\StreamCast\Morpheus\My Shared Folder\CloneDVD.v2.8.2.1.Cracked-RES.by.Grease.exe %ProgramFiles%\Gnucleus\Downloads\CloneDVD.v2.8.2.1.Cracked-RES.by.Grease.exe Adds the values: "sysmem" = "%Program Files%\system prot\mmsete.exe" "memory" = "%Program Files%\Outlook Express.sav\outlookrem.exe" to the registry subkey: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run so that the threat is executed every time Windows starts. Adds the value: "(Default)" = "%ProgramFiles%\Outlook Express.sav\outlookrem.exe" to the registry subkeys: HKEY_CLASSES_ROOT\exefile\shell\open\command HKEY_CLASSES_ROOT\batfile\shell\open\command HKEY_CLASSES_ROOT\cmdfile\shell\open\command HKEY_CLASSES_ROOT\comfile\shell\open\command HKEY_CLASSES_ROOT\piffile\shell\open\command HKEY_CLASSES_ROOT\vbsfile\shell\open\command HKEY_CLASSES_ROOT\vbefile\shell\open\command HKEY_CLASSES_ROOT\scrfile\shell\open\command HKEY_CLASSES_ROOT\regfile\shell\open\command HKEY_CLASSES_ROOT\inffile\shell\open\command Adds the values: "DisableTaskMgr" = "1" "DisableRegistryTools" = "1" to the registry subkey: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System to disable the Task Manager and registry editor. Adds the value: "NoControlPanel" = "1" to the registry subkey: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer to disable the Control Panel. Adds the value: "EnableFirewall" = "0" to the registry subkeys: HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters \FirewallPolicy\StandardProfile HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters \FirewallPolicy\StandardProfile to disable the firewall. Adds the value: "AUOptions" = "0" to the registry subkey: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update to disable Automatic Update and lower security settings. Displays an anti-piracy image. Deletes all .MP3, .AVI, .MPG, .MPEG, and .RAR files from the compromised computer. Finds and disables any debugging programs on the compromised computer. 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. The following instructions pertain to all current and recent Symantec antivirus products, including the Symantec AntiVirus and Norton AntiVirus product lines. Disable System Restore (Windows Me/XP). Update the virus definitions. Run a full system scan and delete all the files detected. Delete any values added to the registry. Restore the Windows security center. For specific details on each of these steps, read the following instructions. 1. To disable System Restore (Windows Me/XP) If you are running Windows Me or Windows XP, we recommend that you temporarily turn off System Restore. Windows Me/XP uses this feature, which is enabled by default, to restore the files on your computer in case they become damaged. If a virus, worm, or Trojan infects a computer, System Restore may back up the virus, worm, or Trojan on the computer. Windows prevents outside programs, including antivirus programs, from modifying System Restore. Therefore, antivirus programs or tools cannot remove threats in the System Restore folder. As a result, System Restore has the potential of restoring an infected file on your computer, even after you have cleaned the infected files from all the other locations. Also, a virus scan may detect a threat in the System Restore folder even though you have removed the threat. For instructions on how to turn off System Restore, read your Windows documentation, or one of the following articles: How to disable or enable Windows Me System Restore How to turn off or turn on Windows XP System Restore Note: When you are completely finished with the removal procedure and are satisfied that the threat has been removed, reenable System Restore by following the instructions in the aforementioned documents. For additional information, and an alternative to disabling Windows Me System Restore, see the Microsoft Knowledge Base article: Antivirus Tools Cannot Clean Infected Files in the _Restore Folder (Article ID: Q263455). 2. To update the virus definitions Symantec Security Response fully tests all the virus definitions for quality assurance before they are posted to our servers. There are two ways to obtain the most recent virus definitions: Running LiveUpdate, which is the easiest way to obtain virus definitions: These virus definitions are posted to the LiveUpdate servers once each week (usually on Wednesdays), unless there is a major virus outbreak. To determine whether definitions for this threat are available by LiveUpdate, refer to the document: Virus Definitions (LiveUpdate). Downloading the definitions using the Intelligent Updater: The Intelligent Updater virus definitions are posted daily. You should download the definitions from the Symantec Security Response Web site and manually install them. To determine whether definitions for this threat are available by the Intelligent Updater, refer to the document: Virus Definitions (Intelligent Updater). The latest Intelligent Updater virus definitions can be obtained here: Intelligent Updater virus definitions. For detailed instructions read the document: How to update virus definition files using the Intelligent Updater. 3. To scan for and delete the infected files Start your Symantec antivirus program and make sure that it is configured to scan all the files. For Norton AntiVirus consumer products: Read the document: How to configure Norton AntiVirus to scan all files. For Symantec AntiVirus Enterprise products: Read the document: How to verify that a Symantec Corporate antivirus product is set to scan all files. Run a full system scan. If any files are detected, click Delete. Important: If your Symantec antivirus product reports that it cannot delete a detected file, Windows may be using the file. To fix this, run the scan in Safe mode. For instructions, read the document: How to start the computer in Safe Mode. Once you have restarted in Safe mode, run the scan again. After the files are deleted, restart the computer in Normal mode and proceed with the next section. Warning messages may be displayed when the computer is restarted, since the threat may not be fully removed at this point. You can ignore these messages and click OK. These messages will not appear when the computer is restarted after the removal instructions have been fully completed. The messages displayed may be similar to the following: Title: [File path] Message body: Windows cannot find [file name]. Make sure you typed the name correctly, and then try again. To search for a file, click the Start button, and then click Search. 4. To delete the value from the registry Important: Symantec strongly recommends that you back up the registry before making any changes to it. Incorrect changes to the registry can result in permanent data loss or corrupted files. Modify the specified subkeys only. For instructions refer to the document: How to make a backup of the Windows registry. Click Start > Run. Type regedit Click OK. Note: If the registry editor fails to open the threat may have modified the registry to prevent access to the registry editor. Security Response has developed a tool to resolve this problem. Download and run this tool, and then continue with the removal. Navigate to the subkey: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run In the right pane, delete the values: "sysmem" = "%ProgramFiles%\system prot\mmsete.exe" "memory" = "%ProgramFiles%\Outlook Express.sav\outlookrem.exe" Navigate to the subkey: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System In the right pane, delete the the value: "DisableTaskMgr" = "1" Navigate to the subkey: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer In the right pane, delete the the value "NoControlPanel" = "1" Navigate to the subkeys: HKEY_CLASSES_ROOT\exefile\shell\open HKEY_CLASSES_ROOT\batfile\shell\open HKEY_CLASSES_ROOT\cmdfile\shell\open HKEY_CLASSES_ROOT\comfile\shell\open HKEY_CLASSES_ROOT\piffile\shell\open In the right pane, change the value to: "command" = ""%1" %*" Navigate to the subkeys: HKEY_CLASSES_ROOT\vbsfile\shell\open HKEY_CLASSES_ROOT\vbefile\shell\open In the right pane, change the value to: "command" = "%System%\WScript.exe "%1" %*" Navigate to the subkey: HKEY_CLASSES_ROOT\scrfile\shell\open In the right pane, change the value to: "command" = ""%1" /S" Navigate to the subkey: HKEY_CLASSES_ROOT\regfile\shell\open In the right pane, change the value to: "command" = "regedit.exe "%1"" Navigate to the subkey: HKEY_CLASSES_ROOT\inffile\shell\open\command In the right pane, change the value to: %System%\NOTEPAD.EXE %1 Exit the Registry Editor. 5. To restore the Windows Security Center This threat attempts to disable the features in the Windows Security Center, available in Windows XP Service Pack 2. If you are running Windows XP Service Pack 2 and would like to restore the full functionality of the Windows Security Center, please complete the following steps: Important: If your computer is connected to a domain, you may not be able to adjust these settings. If so, contact your network administrator for more information. Click Start > Control Panel. Double-click the Security Center. In the right pane, click Windows Firewall. The Windows Firewall appears. Select On. Click OK to close the Windows Firewall. In the left pane of the Security Center, select Change the way Security Center alerts me. Click Alert Settings. Select Alert Settings, Firewall, and Virus Protection. Click OK Click Automatic Updates. Select Automatic. Click OK. Exit the Security Center. And here is the trap of 22.You have to open the reg editor to change the registry but it is disabled by "system admin"(the worm was that admin in my case). You have to log on as admin,but this option is also disabled as Task Manager,Controll Panel,System restore,RUN function,you can not install anything etc. Now,What to do?! I contacted the Live Technician Support at McAffe.He could not help to me(he forced me to log in as admin or ask premisson from system vendor!!!!) I downloaded the new SDAT to DOS scan,but I couldn`t extrct it from RUN neihter with WinRAR,winzip because I couldn`t run any application.So bad. Than I got an idea.I have to download some third party reg editor in non archive format.That was the RegSeeker (ht*p://w*w.hoverdesk.net:80/dl/en/RegSeeker.zip),a free reg editor.Because I couldn`t open it(and install it)I choose in (right click)context menu the "run as".It has installed!Than I gone to Group Polices from My Computer Management (Computer Config.-Admin.Templates-System-System Restor) and enabled the Turned off System Restore.You can do that from safe mode also. After that I rebooted the PC in SAFE MODE,logged in as administrator(here you can do that)."Run As" the RegSeeker and I found,deleted or changed that malicious registry enries mentioned above . Immediately after that I extracted the new SDAT (you can find how to on this site). I rebooted the PC again but now in SAFE MODE WITH COMMAND PROMPT and I did the DOS scan . Now is everything O.K. I hope I could help to you.

This virus worm has changed and can no longer be removed with the information provided.

It is now infecting more reg keys than the ones listed and requires you to logon each users account and repeat the removal process.

Looks like some expected all users to just know to login to each account and fix the reg keys but normal users should not be expected to know that.

I have writen a small script to remove the virus that you can run at the safe mode command prompt. And another that you have to run in each users account.

This will automate the removal process somewhat. You will have to check to make sure that the virus is using the same filenames as the one I saw NOPIR.C


None of the antivirus sites are providing a free removal tool so I will.

Download here Look in downloads under XP utilities.


Please add this file to your P2P share directory and share with others.

I wrote this in about 30mins so its not fancy and as long as I do not find a error this is the final version. So no complaints about how it looks please and post a comment if it helps you.

Thank you! I tried to explain to McAfee Support about this,but they "didn`t hear". Fortunately,I solved the "problem". I WILL SHARE WITH OTHERS!(even with McAfee…) Thank you again!