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Twext.exe trojan


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#1 Brent_007

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Posted 23 November 2008 - 12:05 AM

Hey guys.

Firstly, when I start up my computer, I get two error messages regarding .dll files.

Then I get an AVG error notifying me of a Trojan (twext.exe). I cannot heal it or send it to the vault.

I found a similar problem Here and followed the instructions. I downloaded the software but the "SUPERAntiSpyware" program keeps crashing when I scan in safemode via the blue screen of death :thumbsup:

So I'm clueless. Without the scan I can't get a log. Help would be appreciated.

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#2 boopme

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Posted 23 November 2008 - 12:15 AM

Hello can you be a bit more specific on the dll error. Are you getting messages like this...A "Cannot find...", "Could not run...", "Error loading... or "specific module could not be found" message
Have you successfully removed any malware recently?

Also try this scan from normal mode
Please download Malwarebytes Anti-Malware and save it to your desktop.
  • 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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#3 Brent_007

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Posted 23 November 2008 - 12:36 AM

Hello can you be a bit more specific on the dll error. Are you getting messages like this...A "Cannot find...", "Could not run...", "Error loading... or "specific module could not be found" message
Have you successfully removed any malware recently?


Error Loading C:\Windows\system32\zijigegu.dll

There were other dll files prior to doing the mbam scan. Anyway, here's the log:

Malwarebytes' Anti-Malware 1.30
Database version: 1417
Windows 6.0.6000

23/11/2008 2:29:42 PM
mbam-log-2008-11-23 (14-29-42).txt

Scan type: Quick Scan
Objects scanned: 44773
Time elapsed: 2 minute(s), 33 second(s)

Memory Processes Infected: 1
Memory Modules Infected: 0
Registry Keys Infected: 14
Registry Values Infected: 9
Registry Data Items Infected: 9
Folders Infected: 1
Files Infected: 22

Memory Processes Infected:
C:\Windows\System32\twext.exe (Backdoor.Bot) -> Unloaded process successfully.

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{05220cac-6d87-4b7d-9d49-1a48bf16af31} (Trojan.BHO.H) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\CLSID\{05220cac-6d87-4b7d-9d49-1a48bf16af31} (Trojan.BHO.H) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\sqvgnrpx.btpb (Trojan.Vundo) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\sqvgnrpx.toolbar.1 (Trojan.Vundo) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\Interface\{25ddd24d-1a1b-41ac-919b-b6bc6dfbc2fc} (Trojan.FakeAlert) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\CLSID\{ec43e3fd-5c60-46a6-97d7-e0b85dbdd6c4} (Trojan.BHO) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\CLSID\{63bb2189-05db-4e6b-9542-82c9a1c53c0b} (Trojan.Vundo) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\Typelib\{11ea6f11-55b4-4460-ade5-b0b06736790f} (Trojan.FakeAlert) -> Quarantined and deleted successfully.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Ext\Stats\{63bb2189-05db-4e6b-9542-82c9a1c53c0b} (Trojan.Vundo) -> Quarantined and deleted successfully.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Ext\Stats\{2d2bee6e-3c9a-4d58-b9ec-458edb28d0f6} (Rogue.DriveCleaner) -> 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\contim (Trojan.Vundo) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\rdfa (Trojan.Vundo) -> Quarantined and deleted successfully.

Registry Values Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\0881f8a1 (Trojan.Vundo.H) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Toolbar\{63bb2189-05db-4e6b-9542-82c9a1c53c0b} (Trojan.Vundo) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\SharedTaskScheduler\{ec43e3fd-5c60-46a6-97d7-e0b85dbdd6c4} (Trojan.BHO) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\ssodl (Trojan.BHO) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cpm0bb2cb3d (Trojan.Agent) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yorakomagi (Trojan.Agent) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Network\UID (Malware.Trace) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\fdxbameg (Trojan.FakeAlert) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\fsrpknov (Trojan.FakeAlert) -> Quarantined and deleted successfully.

Registry Data Items Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows\AppInit_DLLs (Trojan.BHO) -> Data: c:\windows\system32\yayosiyi.dll -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows\AppInit_DLLs (Trojan.BHO) -> Data: system32\yayosiyi.dll -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit (Backdoor.Bot) -> Data: c:\windows\system32\twext.exe -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit (Backdoor.Bot) -> Data: system32\twext.exe -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit (Trojan.Agent) -> Data: c:\windows\system32\ -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows\AppInit_DLLs (Trojan.Agent) -> Data: c:\windows\system32\ -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit (Trojan.Agent) -> Data: system32\ -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows\AppInit_DLLs (Trojan.Agent) -> Data: system32\ -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit (Hijack.UserInit) -> Bad: (C:\Windows\system32\userinit.exe,C:\Windows\system32\twext.exe,) Good: (userinit.exe) -> Quarantined and deleted successfully.

Folders Infected:
C:\Windows\System32\twain_32 (Backdoor.Bot) -> Delete on reboot.

Files Infected:
C:\Windows\System32\dusatalo.dll (Trojan.Vundo.H) -> Quarantined and deleted successfully.
C:\Windows\System32\olatasud.ini (Trojan.Vundo.H) -> Quarantined and deleted successfully.
C:\Windows\System32\wavenimu.dll (Trojan.Vundo.H) -> Quarantined and deleted successfully.
C:\Windows\System32\uminevaw.ini (Trojan.Vundo.H) -> Quarantined and deleted successfully.
C:\Windows\System32\wuratapa.dll (Trojan.Vundo.H) -> Quarantined and deleted successfully.
C:\Windows\System32\apataruw.ini (Trojan.Vundo.H) -> Quarantined and deleted successfully.
C:\Windows\System32\keturige.dll (Trojan.BHO.H) -> Delete on reboot.
c:\Windows\System32\yayosiyi.dll (Trojan.BHO) -> Quarantined and deleted successfully.
C:\Windows\System32\TDSSdcom.dll (Trojan.TDSS) -> Delete on reboot.
C:\Windows\System32\TDSSlfpe.dll (Trojan.TDSS) -> Delete on reboot.
C:\Windows\System32\TDSStmei.dll (Trojan.TDSS) -> Delete on reboot.
C:\Windows\System32\TDSSuscv.dll (Trojan.TDSS) -> Delete on reboot.
C:\Windows\System32\drivers\TDSSmgab.sys (Trojan.TDSS) -> Delete on reboot.
C:\Windows\System32\twain_32\local.ds (Backdoor.Bot) -> Delete on reboot.
C:\Windows\System32\twain_32\user.ds (Backdoor.Bot) -> Delete on reboot.
C:\Windows\System32\twain_32\user.ds.cla (Backdoor.Bot) -> Quarantined and deleted successfully.
C:\Windows\System32\zijigegu.dll (Trojan.Agent) -> Delete on reboot.
C:\Windows\System32\a.exe (Trojan.Agent) -> Quarantined and deleted successfully.
C:\Windows\System32\twext.exe (Backdoor.Bot) -> Delete on reboot.
C:\Windows\System32\ (Trojan.Agent) -> Delete on reboot.
C:\Windows\System32\~.exe (Trojan.Downloader) -> Quarantined and deleted successfully.
C:\Windows\System32\TDSSbogm.dll (Rootkit.Agent) -> Delete on reboot.



#4 boopme

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Posted 23 November 2008 - 12:53 AM

Hello reboot if you have not already done so to finish removal.

One or more of the identified infections is a backdoor trojan.

This allows hackers to remotely control your computer, steal critical system information and download and execute files.

I would counsel you to disconnect this PC from the Internet immediately. If you do any banking or other financial transactions on the PC or if it should contain any other sensitive information, please get to a known clean computer and change all passwords where applicable, and it would be wise to contact those same financial institutions to apprise them of your situation.

Though the trojan has been identified and can be killed, because of it's backdoor functionality, your PC is very likely compromised and there is no way to be sure your computer can ever again be trusted. Many experts in the security community believe that once infected with this type of trojan, the best course of action would be a reformat and reinstall of the OS. Please read these for more information:

How Do I Handle Possible Identify Theft, Internet Fraud and CC Fraud?
When Should I Format, How Should I Reinstall

We can still clean this machine but I can't guarantee that it will be 100% secure afterwards. Let me know what you decide to do.


FOR the dll error
Its not unusual to receive such an error after using specialized fix tools.

A "Cannot find...", "Could not run...", "Error loading... or "specific module could not be found" message is usually related to malware that was set to run at startup but has been deleted. Windows is trying to load this file but cannot locate it since the file was mostly likely removed during an anti-virus or anti-malware scan. However, an associated orphaned registry entry remains and is telling Windows to load the file when you boot up. Since the file no longer exists, Windows will display an error message. You need to remove this registry entry so Windows stops searching for the file when it loads.

To resolve this, download Autoruns, search for the related entry and then delete it.
Create a new folder on your hard drive called AutoRuns (C:\AutoRuns) and extract (unzip) the file there. (click HERE if you're not sure how to do this.)
Open the folder and double-click on autoruns.exe to launch it.
Please be patient as it scans and populates the entries.
When done scanning, it will say Ready at the bottom.
Scroll through the list and look for a startup entry related to the file(s) in the error message.
Right-click on the entry and choose delete.
Reboot your computer and see if the startup error returns.
How do I get help? Who is helping me?For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear....Become a BleepingComputer fan: Facebook

#5 Brent_007

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Posted 23 November 2008 - 01:14 AM

Owch. Not what I wanted to hear. I've done everything you've said and everything seems to be working fine.

Thanks a lot for all your help. Really appreciated.

#6 boopme

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Posted 23 November 2008 - 03:27 PM

Your welcome ,please open MBAM again and update it. Then rescan and post that log for review.
How do I get help? Who is helping me?For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear....Become a BleepingComputer fan: Facebook

#7 Brent_007

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Posted 25 November 2008 - 08:13 AM

Cool. Here it is.

Malwarebytes' Anti-Malware 1.30
Database version: 1422
Windows 6.0.6000

25/11/2008 10:12:12 PM
mbam-log-2008-11-25 (22-12-12).txt

Scan type: Quick Scan
Objects scanned: 38952
Time elapsed: 2 minute(s), 57 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)



#8 boopme

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Posted 25 November 2008 - 03:15 PM

If things are still good then do this too....

Now 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.
Vista Users can refer to these links: Create a New Restore Point and Disk Cleanup.
How do I get help? Who is helping me?For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear....Become a BleepingComputer fan: Facebook




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