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Virus Infection (tdss And Aspi?) And Laptop Stuck!


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#1 davidec

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Posted 23 August 2008 - 06:48 AM

Hello!

This is my first post here, and unfortunately to solve a problem of mine!

I have a Toshiba Satellite running Windows XP SP2. I use AVG as resident AntiVirus and I keep the Windows firewall activated. The browser I use is Firefox 2.

A couple of days ago I was connected with an admin account and I was infected by some virus: AVG detected infected files, claimed it had removed them and after a couple of seconds the firewall warned me that some process (svchost) wanted to connect to the Internet. I allowed it (fool me!!!!) and then another message showed me that I needed to activate Windows Firewall! Meanwhile a blue desktop appeared, with the warning "Spyware detected" and womething like "Install an Antivirus". Somewhere appeared something with "Antivirus XP"... While I was activating the firewall, my computer exited the Operating System and a BIOS-like screen appeared, telling me that the OS had been stopped because an operation had been asked that could have damaged the machine.

When I tried to connect again, the OS was exited almost immediately after login. I tried a couple of times with the same result. I tried to login as a normal user and everything seemed normal, desktop included.
I scanned the system in safe mode with DrWeb at first (it detected some infected files and claimed to have deleted them all), then with AVG (which found some of the "deleted" files and others infected). Then I decided to clean the registry keys, files and services myself (not the first time I did it, although on other machines).

The bunch of files I detected comprehended stuff like <System32>\tdssl.dll, <System32\drivers>\svchost.exe (fool me!!!!), <System32>\lphcn0qj0e973.bmp, other files starting with tdss, all created when I was infected, <Local Settings\temp>\tds2.tmp, <Local Settings\temp>\tdssabf8.tmp, <WINDOWS>\ws386.ini, <Local Settings\temp>\_check32.bat. Entries in the registry keys and services included stuff about Microsoft ASPI management and TDSSSERV. I thought I had removed everything and tried to login as normal, but the effect was the same (actually now when I try to login, either I am sent to the BIOS-like screen or the only thing that moves in my laptop is the cursor, but no input is caught by the system, neither from the keyboard: I can't understand what's different in my behaviour to cause two different outcomes! I thougt it was network connection availability, but I was proven wrong!) I then went back to safe mode and saw that one of the keys I had removed from the registry was back again! It's LEGACY_TDSSSERV (HKLM\System\CurrentControlSet\Enum\Root and in ControlSet001 and ControlSet002).

I figure the situation is difficult to solve in a standard way, since I touched the system here and there, but I would really appreciate some help, at least hints... Please keep in mind that I can't provide actual logs, since I can't log in to my account long enough in normal mode!!!

Thank you very much in advance!

PS: I also tried to create a new system administrator account, but to no avail: he's sent to the BIOS screen as usual...

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#2 quietman7

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Posted 23 August 2008 - 07:45 AM

Welcome to BC

I have some bad news for you. One or more of the identified infections (tdssserv.sys) was related to a nasty rootkit component. Rootkits and backdoor Trojan 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, you should immediately disconnect from the Internet until your system is cleaned. 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 has been identified and may be 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 the rootkit 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?"

Should you decide not to follow that advice, we will do our best to help clean the computer of any infections but we cannot guarantee it to be trustworthy or that the removal will be successful. Let me know how you wish to proceed.
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#3 davidec

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Posted 23 August 2008 - 10:20 AM

Hello!

Thanks for the quick reply! Unfortunately I need to regain use of that particular computer, because of stuff I was developing and of the whole environment I used to develop. Fortunately I didn't have sensitive (meaning concerning money) information on it, so I'm not too concerned about that, but I'll take your advice and look if I need to change passwords which I now consider not sensitive.

So I'd really appreciate your help in removing this virus. Please let me know what you need and I'll provide it as soon as possible...

Thanks in advance!

#4 quietman7

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Posted 23 August 2008 - 01:31 PM

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. Reagardless 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.

Note: Scanning in safe or normal mode will work but removal functions are not as powerful in safe mode. MBAM is designed to be at full power when malware is running so safe mode is not necessary when using it. In fact, it loses some effectiveness for detection & removal when used in safe mode because the program includes a driver which does not work in safe mode. For optimal removal, normal mode is recommended. If you cannot use normal mode, then perform your scan in safe mode. After reboot, click the Logs tab and copy/paste the contents of the new report in your next reply.
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#5 davidec

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Posted 23 August 2008 - 05:55 PM

Thanks again for your help. I did as you suggested, but all in safe mode, since I can't stay more than a few seconds in normal mode as administrator. I attach the log of the first scan at the bottom of the message (I translated some parts, since I installed MBAM in Italian).
As you stated, a reboot was needed (again in safe mode). I did it and then scanned again (quick scan). I don't attach the second log file, since it says that no threats were found. So it seems everything is now ok, but I wait for your reply before trying to login in normal mode again, lest some element be recreated...


-------------------------------------------------------------------------

Malwarebytes' Anti-Malware 1.25
Database Version: 1078
Windows 5.1.2600 Service Pack 2

0.29.59 24/08/2008
mbam-log-08-24-2008 (00-29-59).txt

Scan Type: Quick Scan
Scanned Elements: 58806
Time Elapsed: 6 minute(s), 49 second(s)

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

Infected Memory Processes:
(No malware found)

Infected Memory Modules:
(No malware found)

Infected Registry Keys:
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\Software Notifier (Rogue.Multiple) -> Quarantined and deleted successfully.

Infected Registry Values:
HKEY_CURRENT_USER\Control Panel\Desktop\wallpaper (Hijack.Wallpaper) -> Quarantined and deleted successfully.
HKEY_CURRENT_USER\Control Panel\Desktop\originalwallpaper (Hijack.Wallpaper) -> Quarantined and deleted successfully.
HKEY_CURRENT_USER\Control Panel\Desktop\convertedwallpaper (Hijack.Wallpaper) -> Quarantined and deleted successfully.

Infected Registry Values:
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\NoDispBackgroundPage (Hijack.DisplayProperties) -> Bad: (1) Good: (0) -> Quarantined and deleted successfully.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\NoDispScrSavPage (Hijack.DisplayProperties) -> Bad: (1) Good: (0) -> Quarantined and deleted successfully.

Infected Folders:
(No malware found)

Infected Files:
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) -> Quarantined and deleted successfully.
C:\WINDOWS\system32\tdsslog.dll (Trojan.Agent) -> Delete on reboot.
C:\WINDOWS\system32\tdssservers.dat (Trojan.Agent) -> Quarantined and deleted successfully.
C:\WINDOWS\system32\drivers\tdssserv.sys (Trojan.Agent) -> Quarantined and deleted successfully.
C:\WINDOWS\s32.txt (Malware.Trace) -> Quarantined and deleted successfully.

#6 wedge1

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Posted 23 August 2008 - 06:18 PM

I too have this problem but I am unable to open any programs to rid this problem, nor in safe mode.

#7 quietman7

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Posted 23 August 2008 - 06:37 PM

Welcome to BC wedge1

If you have an issue or problem you would like to discuss, please start your own topic. Doing that will help to avoid the confusion that often occurs when trying to help two or more members at the same time in the same thread. Even if your problem is similar to the original poster's problem, the solution could be different based on the kind of hardware, software, system requirements, etc. you are using and the presence of other malware. Further, posting for assistance in someone else's topic is not considered proper forum etiquette.

Thanks for your cooperation.


davidec, reboot normally and see if you can complete a Quick scan with MBAM, then reboot again if anything was found after checking off to remove whatever was found.
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#8 davidec

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Posted 24 August 2008 - 05:08 AM

Hello again!
Thank you very much, MBAM worked great! I don't know whether some parts of the system were damaged, but I'll found out working in normal mode... Which is a breakthrough!!! :thumbsup: :flowers:
By the way, MBAM didn't find any malware at the first normal boot!

Thank you very very much for your help!


T H A N K S !


#9 quietman7

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Posted 24 August 2008 - 12:39 PM

You're welcome.

If there are no more problems or signs of infection, you should Create a New Restore Point to prevent possible reinfection from an old one. Some of the malware you picked up could have been saved in System Restore. Since this is a protected directory your tools cannot access to delete these files, they sometimes can reinfect your system if you accidentally use an old restore point. Setting a new restore point AFTER cleaning your system will help prevent this and enable your computer to "roll-back" to a clean working state.

The easiest and safest way to do this is:
  • Go to Start > Programs > Accessories > System Tools and click "System Restore".
  • Choose the radio button marked "Create a Restore Point" on the first screen then click "Next". Give the R.P. a name, then click "Create". The new point will be stamped with the current date and time. Keep a log of this so you can find it easily should you need to use System Restore.
  • Then use Disk Cleanup to remove all but the most recently created Restore Point.
  • Go to Start > Run and type: Cleanmgr
  • Click "Ok"
  • Disk Cleanup will scan your files for several minutes, then open.
  • Click the "More Options" Tab.
  • Click the "Clean up" button under System Restore.
  • Click Ok. You will be prompted with "Are you sure you want to delete all but the most recent restore point?"
  • Click Yes, then click Ok.
  • Click Yes again when prompted with "Are you sure you want to perform these actions?"
  • Disk Cleanup will remove the files and close automatically.
For Tips to protect yourself against malware and reduce the potential for re-infection, be sure to read:
• "Simple and easy ways to keep your computer safe".
• "How did I get infected?, With steps so it does not happen again!".
• "Best Practices - Internet Safety for 2008".
• "Hardening Windows Security - Part 1 & Part 2".
• "IE Recommended Minimal Security Settings" - "How to Secure Your Web Browser".

• Avoid gaming sites, underground web pages, pirated software sites, and peer-to-peer (P2P) file sharing programs. They are a security risk which can make your computer susceptible to a smörgåsbord of malware infections, remote attacks, exposure of personal information, and identity theft. Many malicious worms and Trojans spread across P2P file sharing networks, gaming and underground sites. Users visiting such pages may see innocuous-looking banner ads containing code which can trigger pop-up ads and Flash ads that install viruses, Trojans and spyware. Ads are a target for hackers because they offer a stealthy way to distribute malware to a wide range of Internet users. The best way to reduce the risk of infection is to avoid these types of web sites and not use any P2P applications. Read P2P Software User Advisories and Risks of File-Sharing Technology.
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