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Infected With A Backdoor Program.


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7 replies to this topic

#1 reQueim

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Posted 26 June 2008 - 04:35 PM

Ok file's are mstask.sys and mstask(1).bin

Windows Vista Ultimate X64 SP1



When booting into windows it just says mstask.sys has crashed Windows Defender flags it and asks to remove it so I let it but it reappears hours later or after a restart.

I'm thinking its hiding in a core file and reinstalling it self everytime it gets deleted. Not alot more I can say it doesn't impead performance and its only the two files but would like to clean my system of them.

I don't think there even running properly either a malfuctioning virus or Windows Vista is not its intended target system to infect because it crashes everytime.

I'm just rambling possibilites here, really require help removing it now. I posted previously that I had got rid of it but the damned thing keeps re-appearing


Thanks, Kind Regards

-reQ

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#2 boopme

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Posted 26 June 2008 - 08:34 PM

Let's give these a run and see if it finds it. Please Run as administrator.

Please download ATF Cleaner by Atribune & save it to your desktop.
  • Double-click ATF-Cleaner.exe to run the program.
  • Under Main "Select Files to Delete" choose: Select All.
  • Click the Empty Selected button.
  • If you use Firefox browser click Firefox at the top and choose: Select All
  • Click the Empty Selected button.
    If you would like to keep your saved passwords, please click No at the prompt.
  • If you use Opera browser click Opera at the top and choose: Select All
  • Click the Empty Selected button.
    If you would like to keep your saved passwords, please click No at the prompt.
  • Click Exit on the Main menu to close the program.
Note: On Vista, "Windows Temp" is disabled. To empty "Windows Temp" ATF-Cleaner must be "Run as an Administrator".

NEXT:
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 Download_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 and you may be prompted to restart your computer. (see Note below)
  • 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 will be presented with 1 of 2 prompts. Click OK to either and let MBAM proceed with the disinfection process. If asked to restart the computer, please do so immediately. Failure to reboot will prevent MBAM from removing all the malware.

NOW:
Download SUPERAntiSpyware , Free Home Version. Save to desktop ..
DO NOT run yet.
Open SUPER from icon and install and Update it
Under Scanner Options make sure the following are checked (leave all others unchecked):
Close browsers before scanning.
Scan for tracking cookies.
Terminate memory threats before quarantining
.
Click the "Close" button to leave the control center screen and exit the program. DO NOT run yet.

Now reboot into Safe Mode:
How to start Windows in Safe Mode

NOW Scan with SUPER
Open from the desktop icon or the program Files list
On the left, make sure you check C:\Fixed Drive.
Perform a Complete scan. After scan,Verify they are all checked.
Click OK on the summary screen to quarantine all found items.
If asked if you want to reboot, click "Yes" and reboot normally.

To retrieve the removal information after reboot, launch SUPERAntispyware again.
Click Preferences, then click the Statistics/Logs tab.
Under Scanner Logs, double-click SUPERAntiSpyware Scan Log.
If there are several logs, click the current dated log and press View log.
A text file will open in your default text editor.
Please copy and paste the Scan Log results in your next reply.
Click Close to exit the program.

Please ask any needed questions,post logs and Let us know how the PC is running now.
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#3 reQueim

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Posted 01 July 2008 - 07:19 PM

Malwarebytes' Anti-Malware 1.19
Database version: 912
Windows 6.0.6001 Service Pack 1

00:07:33 02/07/2008
mbam-log-7-2-2008 (00-07-33).txt

Scan type: Full Scan (C:\|D:\|G:\|)
Objects scanned: 263032
Time elapsed: 59 minute(s), 34 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 0
Registry Data Items Infected: 0
Folders Infected: 0
Files Infected: 4

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
(No malicious items detected)

Registry Values Infected:
(No malicious items detected)

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
(No malicious items detected)

Files Infected:
C:\Program Files (x86)\yEnc32\uninstall.exe (Trojan.Zlob) -> Quarantined and deleted successfully.
C:\Windows\System32\comsa32.sys (Trojan.Agent) -> Quarantined and deleted successfully.
C:\Windows\System32\drmgs.sys (Rootkit.Agent) -> Quarantined and deleted successfully.
C:\Windows\System32\perfs.exe (Trojan.Downloader) -> Delete on reboot.


**Late at moment unable to do Superscan will attempt that tommorow. Files above have been removed.**


Malwarebytes' Anti-Malware 1.19
Database version: 912
Windows 6.0.6001 Service Pack 1

01:04:54 02/07/2008
mbam-log-7-2-2008 (01-04-54).txt

Scan type: Full Scan (C:\|)
Objects scanned: 224626
Time elapsed: 48 minute(s), 3 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 0
Registry Data Items Infected: 0
Folders Infected: 0
Files Infected: 0

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
(No malicious items detected)

Registry Values Infected:
(No malicious items detected)

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
(No malicious items detected)

Files Infected:
(No malicious items detected)




**First scan was all drives, second scan was on C: has all the Trojan were located on this drive; if you require me to do those drive too then I shall.

I thought it was only 1 Trojan, how wrong can one be, I'm usually very carful about what I install.
**

Edited by reQueim, 01 July 2008 - 07:20 PM.


#4 reQueim

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Posted 02 July 2008 - 07:34 AM

SUPERAntiSpyware Scan Log
http://www.superantispyware.com

Generated 07/02/2008 at 01:23 PM

Application Version : 4.15.1000

Core Rules Database Version : 3495
Trace Rules Database Version: 1486

Scan type : Quick Scan
Total Scan Time : 00:36:19

Memory items scanned : 139
Memory threats detected : 0
Registry items scanned : 187
Registry threats detected : 0
File items scanned : 41665
File threats detected : 30

Adware.Tracking Cookie
G:\Documents and Settings\SexGod\Cookies\sexgod@2o7[1].txt
G:\Documents and Settings\SexGod\Cookies\sexgod@ad.yieldmanager[1].txt
G:\Documents and Settings\SexGod\Cookies\sexgod@adbrite[1].txt
G:\Documents and Settings\SexGod\Cookies\sexgod@adrevolver[1].txt
G:\Documents and Settings\SexGod\Cookies\sexgod@adrevolver[2].txt
G:\Documents and Settings\SexGod\Cookies\sexgod@ads.anm.co[1].txt
G:\Documents and Settings\SexGod\Cookies\sexgod@ads.guru3d[1].txt
G:\Documents and Settings\SexGod\Cookies\sexgod@advertising[2].txt
G:\Documents and Settings\SexGod\Cookies\sexgod@adviva[1].txt
G:\Documents and Settings\SexGod\Cookies\sexgod@apmebf[1].txt
G:\Documents and Settings\SexGod\Cookies\sexgod@atdmt[2].txt
G:\Documents and Settings\SexGod\Cookies\sexgod@bs.serving-sys[2].txt
G:\Documents and Settings\SexGod\Cookies\sexgod@doubleclick[1].txt
G:\Documents and Settings\SexGod\Cookies\sexgod@fastclick[1].txt
G:\Documents and Settings\SexGod\Cookies\sexgod@hlstatsx[1].txt
G:\Documents and Settings\SexGod\Cookies\sexgod@kontera[2].txt
G:\Documents and Settings\SexGod\Cookies\sexgod@media.adrevolver[2].txt
G:\Documents and Settings\SexGod\Cookies\sexgod@mediaplex[1].txt
G:\Documents and Settings\SexGod\Cookies\sexgod@microsoftgamestudio.112.2o7[1].txt
G:\Documents and Settings\SexGod\Cookies\sexgod@msnportal.112.2o7[1].txt
G:\Documents and Settings\SexGod\Cookies\sexgod@questionmarket[1].txt
G:\Documents and Settings\SexGod\Cookies\sexgod@revsci[2].txt
G:\Documents and Settings\SexGod\Cookies\sexgod@serving-sys[2].txt
G:\Documents and Settings\SexGod\Cookies\sexgod@statse.webtrendslive[2].txt
G:\Documents and Settings\SexGod\Cookies\sexgod@tacoda[1].txt
G:\Documents and Settings\SexGod\Cookies\sexgod@tradedoubler[1].txt
G:\Documents and Settings\SexGod\Cookies\sexgod@tribalfusion[1].txt
G:\Documents and Settings\SexGod\Cookies\sexgod@windowsmedia[2].txt
G:\Documents and Settings\SexGod\Cookies\sexgod@www.etracker[1].txt
G:\Documents and Settings\SexGod\Cookies\sexgod@zedo[2].txt


I think that the Trojan has now been deleted mstask.sys has not reappeared left my computer on all night to do some folding and its not reappeared.


Thanks for all the help and the useful tools that have helped getting rid of this.

Edited by reQueim, 02 July 2008 - 07:37 AM.


#5 quietman7

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Posted 02 July 2008 - 07:53 AM

IMPORTANT NOTE: One or more of the identified infections was related to a rootkit component. Rootkits are very dangerous because they use advanced techniques 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 the rootkit has been removed the computer is now secure. 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?" and "Help: I Got Hacked. Now What Do I Do?".
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#6 reQueim

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Posted 02 July 2008 - 12:22 PM

Erm, well this adds more bleep to the fan; I will mention how-ever that my passwords are not saving I presumed this was because I had to repair my username then rename it and its not running properly.

I'll will take your advice on board and immediatly change all my passwords. Thanks for all your help.

I need further advice I'm cancelling my accounts now to be safe but I have so much data of multiple drives now the viruses were on a particular drive will I have to format eveyone of them?

Edited by reQueim, 02 July 2008 - 12:30 PM.


#7 reQueim

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Posted 03 July 2008 - 07:39 AM

All viruses (Trojans removed)

Formatted my computer and eveything is working fine and dandy.

Cheers for all your help.


Case closed. :D

#8 quietman7

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Posted 03 July 2008 - 07:45 AM

You're welcome.

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 online gaming sites and peer-to-peer (P2P) or file sharing programs as they are a security risk which can make your system susceptible to a smörgåsbord of malware infections, remote attacks, exposure of personal information, and identity theft. Many malicious worms and Trojans target and spread across P2P files sharing networks and gaming sites. In some instances the infection may cause so much damage to your system that recovery is not possible and the only option is to wipe your drive, reformat and reinstall the OS. The best way to reduce the risk of infection is to avoid gaming sites and not use any P2P applications. Read P2P Software User Advisories and Risks of File-Sharing Technology.
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