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Is Crypt32chain A Virus?


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#1 gailigan

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Posted 11 September 2008 - 09:57 AM

There is a virus or spyware on my computer that prevents me from seeing some websites (including bleepingcomputers.com), it blocks all google links and brings me to advertisement sites whenever i click them, it blocks all downloads through internet explorer (not through firefox safemode), my computer freezes all the time, makes clicking sounds when there are no programs running, and has recently started playing music when there are no programs running, and i think it is preventing my antivirus software from working properly and getting rid of it.

I tried following the instructions using autoruns in safe mode, even though its pretty confusing and almost impossible to know if any of the numerous items listed there are viruses, i found crypt32chain, which according to google searches is a virus. I tried to delete it but i got this message: Error deleting start setting: "The system cannot find the file specified."

I also tried deleting it through windows explorer and got this message: "Cannot delete crypt32.dll. Access is denied. Make sure the disk is not full or write-protected and the file is not currently in use."

I don't know what to do, I have to get rid of this thing, please help!!!

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#2 quietman7

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Posted 11 September 2008 - 10:13 AM

Are you using Spybot S&D and is that alerting you to crypt32chain?

These are normal on xp and XP Pro
Located: System.ini, crypt32chain
command: crypt32.dll
file: crypt32.dll

forums.spybot.info

crypt32.dll is a module that contains the functions used by the Windows Crypto API. It is being used by various applications.

processlibrary.com

Determining whether a file is malware or a legitimate process sometimes depends on the location (path) it is running from. One of the ways that malware tries to hide is to give itself the same name as a critical system file. However, it then places itself in a different location on your computer. A file's properties may give a clue to identifying it. Right-click on the file, Properties and examine the General and Version tabs.

If you cannot find any information, the file has a legitimate name but is not located where it is supposed to be, or you want a second opinion, submit it to jotti's virusscan or virustotal.com. In the "File to upload & scan" box, browse to the location of the suspicious file and submit (upload) it for scanning/analysis.
-- Then post back with the results of the file analysis.
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#3 gailigan

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Posted 11 September 2008 - 10:25 AM

I am using spybot, it did not alert me to crpyt32, but its not helping my problem. I ran it a few times and it found and deleted things the first 2 times but now it doesn't find anything and my computer is still infected. I really don't know how else to find the virus.

#4 quietman7

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Posted 11 September 2008 - 10:31 AM

Please download Malwarebytes Anti-Malware and save it to your desktop.
alternate download link 1
alternate download link 2
  • Make sure you are connected to the Internet.
  • Double-click on mbam-setup.exe to install the application.
  • When the installation begins, follow the prompts and do not make any changes to default settings.
  • When installation has finished, make sure you leave both of these checked:
    • Update Malwarebytes' Anti-Malware
    • Launch Malwarebytes' Anti-Malware
  • Then click Finish.
MBAM will automatically start and you will be asked to update the program before performing a scan.
  • If an update is found, the program will automatically update itself.
  • Press the OK button to close that box and continue.
  • If you encounter any problems while downloading the updates, manually download them from here and just double-click on mbam-rules.exe to install.
On the Scanner tab:
  • Make sure the "Perform Quick Scan" option is selected.
  • Then click on the Scan button.
  • If asked to select the drives to scan, leave all the drives selected and click on the Start Scan button.
  • The scan will begin and "Scan in progress" will show at the top. It may take some time to complete so please be patient.
  • When the scan is finished, a message box will say "The scan completed successfully. Click 'Show Results' to display all objects found".
  • Click OK to close the message box and continue with the removal process.
Back at the main Scanner screen:
  • Click on the Show Results button to see a list of any malware that was found.
  • Make sure that everything is checked, and click Remove Selected.
  • When removal is completed, a log report will open in Notepad.
  • The log is automatically saved and can be viewed by clicking the Logs tab in MBAM.
  • Copy and paste the contents of that report in your next reply and exit MBAM.
Note: If MBAM encounters a file that is difficult to remove, you may be asked to reboot your computer so it can proceed with the disinfection process. Regardless if prompted to restart the computer or not, please do so immediately. Failure to reboot normally (not into safe mode) will prevent MBAM from removing all the malware. MBAM may make changes to your registry as part of its disinfection routine. If you're using other security programs that detect registry changes, they may alert you after scanning with MBAM. Please permit the program to allow the changes.
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#5 gailigan

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Posted 11 September 2008 - 10:34 AM

Thanks so much for your help so far. I will do all this when i get home from work today. I wish I could do it right now because I am anxious to have the problem solved, but I am hopeful that this will work. I will post after I try this, please check back in case I need more help!

Thanks again!

#6 gailigan

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Posted 11 September 2008 - 10:38 AM

Would you be able to e-mail me the link to MBAM? The virus blocks my access to bleepingcomputer.com so I won't be able to read this post from the infected computer. I should be able to download the program from email though.

#7 quietman7

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Posted 11 September 2008 - 10:40 AM

These are all download links. You can use any of them:
http://www.malwaresupport.com/mbam/program/mbam-setup.exe
http://www.besttechie.net/tools/mbam-setup.exe
http://malwarebytes.gt500.org/mbam-setup.exe
http://www.download.com/Malwarebytes-Anti-...4-10804572.html
http://download.bleepingcomputer.com/malwa.../mbam-setup.exe
http://www.majorgeeks.com/Malwarebytes_Ant...ware_d5756.html
http://www.softpedia.com/get/Antivirus/Mal...i-Malware.shtml
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#8 gailigan

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Posted 11 September 2008 - 10:42 AM

thank you so much!

#9 quietman7

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Posted 11 September 2008 - 10:53 AM

You're welcome and good luck.
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#10 gailigan

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Posted 11 September 2008 - 10:02 PM

Great news!!!! After following your directions I'm able to access this website, which I couldn't do before! Here's the log:

Malwarebytes' Anti-Malware 1.28
Database version: 1141
Windows 5.1.2600 Service Pack 2

9/11/2008 10:53:39 PM
mbam-log-2008-09-11 (22-53-39).txt

Scan type: Quick Scan
Objects scanned: 47434
Time elapsed: 4 minute(s), 24 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 6
Registry Values Infected: 0
Registry Data Items Infected: 3
Folders Infected: 2
Files Infected: 9

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
HKEY_CLASSES_ROOT\toolbar.tb (Trojan.BHO) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\toolbar.tb.1 (Trojan.BHO) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Ext\PreApproved\{37b85a2b-692b-4205-9cad-2626e4993404} (Adware.MyWebSearch) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\tdssdata (Trojan.Agent) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\tdss (Trojan.Agent) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\__c00b005e (Trojan.Vundo) -> Quarantined and deleted successfully.

Registry Values Infected:
(No malicious items detected)

Registry Data Items Infected:
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Start_ShowRun (Hijack.StartMenu) -> Bad: (0) Good: (1) -> Quarantined and deleted successfully.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Start_ShowMyDocs (Hijack.StartMenu) -> Bad: (0) Good: (1) -> Quarantined and deleted successfully.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Start_ShowMyComputer (Hijack.StartMenu) -> Bad: (0) Good: (1) -> Quarantined and deleted successfully.

Folders Infected:
C:\Program Files\WinBudget (Adware.AdMedia) -> Quarantined and deleted successfully.
C:\Program Files\WinBudget\bin (Adware.AdMedia) -> Quarantined and deleted successfully.

Files Infected:
C:\Program Files\WinBudget\bin\matrix.dat (Adware.AdMedia) -> Quarantined and deleted successfully.
C:\WINDOWS\system32\tdssadw.dll (Trojan.Agent) -> Delete on reboot.
C:\WINDOWS\system32\tdssl.dll (Trojan.Agent) -> Delete on reboot.
C:\WINDOWS\system32\tdssserf.dll (Trojan.Agent) -> Delete on reboot.
C:\WINDOWS\system32\tdssmain.dll (Trojan.Agent) -> Delete on reboot.
C:\WINDOWS\system32\tdssinit.dll (Trojan.Agent) -> Delete on reboot.
C:\WINDOWS\system32\tdsslog.dll (Trojan.Agent) -> Delete on reboot.
C:\WINDOWS\system32\tdssservers.dat (Trojan.Agent) -> Delete on reboot.
C:\WINDOWS\system32\drivers\tdssserv.sys (Trojan.Agent) -> Delete on reboot.


Do I have any reason to worry about my computer still being infected?

#11 quietman7

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Posted 12 September 2008 - 08:16 AM

Your MBAM log indicates some files will be deleted on reboot. If MBAM encounters a file that is difficult to remove, you need to restart the computer so the malware can be fully removed. Failure to reboot normally (not into safe mode) will prevent MBAM from removing all the malware. If you have not rebooted, make sure you do this. When done, rescan again with MBAM and check all items found for removal. Then click the Logs tab and copy/paste the contents of the new report in your next reply. If you did reboot, then rescan again anyway and post a new log.

IMPORTANT NOTE: One or more of the identified infections (tdssserv.sys) was related to a nasty rootkit component. Rootkits and backdoor Trojans are very dangerous because they use advanced techniques (backdoors) as a means of accessing a computer system that bypasses security mechanisms and steal sensitive information which they send back to the hacker. Many rootkits can hook into the Windows 32-bit kernel, and patch several APIs to hide new registry keys and files they install. Remote attackers use backdoor Trojans and rootkits as part of an exploit to gain unauthorized access to a computer and take control of it without your knowledge.

If your computer was used for online banking, has credit card information or other sensitive data on it, all passwords should be changed immediately to include those used for banking, email, eBay, paypal and online forums. You should consider them to be compromised. They should be changed by using a different computer and not the infected one. If not, an attacker may get the new passwords and transaction information. Banking and credit card institutions should be notified of the possible security breach. Because your computer was compromised please read How Do I Handle Possible Identify Theft, Internet Fraud and CC Fraud?

Although the rootkit was identified and removed, your PC has likely been compromised and there is no way to be sure the computer can ever be trusted again. It is dangerous and incorrect to assume that because this malware has been removed the computer is now secure. In some instances an infection may have caused so much damage to your system that it cannot be completely cleaned or repaired. The malware may leave so many remnants behind that security tools cannot find them. Many experts in the security community believe that once infected with this type of malware, the best course of action is to wipe the drive clean, reformat and reinstall the OS. Please read:

"When should I re-format? How should I reinstall?"
"Help: I Got Hacked. Now What Do I Do?"
"Where to draw the line? When to recommend a format and reinstall?"
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