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Brontok.A infection


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#1 I am the Walrus

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Posted 11 February 2009 - 03:31 AM

I have a custom desktop that picked up the Brontok.A virus and won't die (due to my lack of weapons to use, no doubt) I used a flash drive today to move some mp3 files (stupid!) to another pc and it immediatly quarentined the files and seemed to identify it. This pc is not connected to internet but I am able to access the web(and you) from another one in the house. Would you please give me some direction on how to exterminate this bugger once and for all? Your past help has been dead on in fixing my daughters virus problem. Thank you in advance for your help. "I am the Walrus"

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#2 DaChew

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Posted 11 February 2009 - 10:02 AM

Please download Flash_Disinfector.exe by sUBs and save it to your desktop.
  • Double-click Flash_Disinfector.exe to run it and follow any prompts that may appear.
  • The utility may ask you to insert your flash drive and/or other removable drives. Please do so and allow the utility to clean up those drives as well.
  • Hold down the Shift key when inserting the drive until Windows detects it to keep autorun.inf from executing if it is present.
  • Wait until it has finished scanning and then exit the program.
  • Reboot your computer when done.
Note: As part of its routine, Flash_Disinfector will create a hidden folder named autorun.inf in each partition and every USB drive that was plugged in when you ran it. Do not delete this folder...it will help protect your drives from future infection by keeping the autorun file from being installed on the root drive and running other malicious files.


Use the clean computer and the usb drive, we need to make sure there are no autorun's being transfered

After that is done let's transfer this installer and the manual definition updates to the infected computer and try to run a scan with MBAM

Please download Malwarebytes Anti-Malware (v1.32) and save it to your desktop.
alternate download link 1
alternate download link 2
If you have a previous version of MBAM, remove it via Add/Remove Programs and download a fresh copy.
  • 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. Alternatively, you can update through MBAM's interface from a clean computer, copy the definitions (rules.ref) located in C:\Documents and Settings\All Users\Application Data\Malwarebytes\Malwarebytes' Anti-Malware from that system to a usb stick or CD and then copy it to the infected machine.
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 using other security programs that detect registry changes (ie Spybot's Teatimer), they may interfere or alert you after scanning with MBAM. Please temporarily disable such programs or permit them to allow the changes.
Chewy

No. Try not. Do... or do not. There is no try.

#3 I am the Walrus

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Posted 11 February 2009 - 11:17 PM

This is the Malware log
note:when I plugged the drive with the log in I received the message of a Win32/Robknot.Z worm. ?????


Malwarebytes' Anti-Malware 1.33
Database version: 1654
Windows 5.1.2600 Service Pack 2

2/11/2009 8:03:14 PM
mbam-log-2009-02-11 (20-03-14).txt

Scan type: Quick Scan
Objects scanned: 69262
Time elapsed: 5 minute(s), 57 second(s)

Memory Processes Infected: 3
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 1
Registry Data Items Infected: 3
Folders Infected: 0
Files Infected: 6

Memory Processes Infected:
C:\Documents and Settings\Mufasa\Local Settings\Application Data\lsass.exe (Heuristics.Reserved.Word.Exploit) -> Unloaded process successfully.
C:\Documents and Settings\Mufasa\Local Settings\Application Data\services.exe (Heuristics.Reserved.Word.Exploit) -> Unloaded process successfully.
C:\Documents and Settings\Mufasa\Local Settings\Application Data\winlogon.exe (Heuristics.Reserved.Word.Exploit) -> Unloaded process successfully.

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
(No malicious items detected)

Registry Values Infected:
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\tok-cirrhatus (Heuristics.Reserved.Word.Exploit) -> Quarantined and deleted successfully.

Registry Data Items Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell (Backdoor.Bot) -> Data: c:\winnt\eksplorasi.exe -> Quarantined and deleted successfully.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools (Hijack.Regedit) -> Bad: (1) Good: (0) -> Quarantined and deleted successfully.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoFolderOptions (Hijack.FolderOptions) -> Bad: (1) Good: (0) -> Quarantined and deleted successfully.

Folders Infected:
(No malicious items detected)

Files Infected:
C:\WINNT\eksplorasi.exe (Backdoor.Bot) -> Quarantined and deleted successfully.
C:\Documents and Settings\Mufasa\Local Settings\Application Data\csrss.exe (Heuristics.Reserved.Word.Exploit) -> Quarantined and deleted successfully.
C:\Documents and Settings\Mufasa\Local Settings\Application Data\lsass.exe (Heuristics.Reserved.Word.Exploit) -> Quarantined and deleted successfully.
C:\Documents and Settings\Mufasa\Local Settings\Application Data\services.exe (Heuristics.Reserved.Word.Exploit) -> Quarantined and deleted successfully.
C:\Documents and Settings\Mufasa\Local Settings\Application Data\smss.exe (Heuristics.Reserved.Word.Exploit) -> Quarantined and deleted successfully.
C:\Documents and Settings\Mufasa\Local Settings\Application Data\winlogon.exe (Heuristics.Reserved.Word.Exploit) -> Quarantined and deleted successfully.

#4 DaChew

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Posted 11 February 2009 - 11:50 PM

note:when I plugged the drive with the log in I received the message of a Win32/Robknot.Z worm. ?????


Let's start over

Hold down the Shift key when inserting the drive


Take the usb drive and format it using MyComputer with the clean computer, then open sub's flash disinfector and run it again

Now transfer the newest MBAM to the drive

http://www.download.com/windows/

http://www.download.com/Malwarebytes-Anti-...cdlPid=11004434
Chewy

No. Try not. Do... or do not. There is no try.

#5 I am the Walrus

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Posted 17 February 2009 - 07:04 AM

sorry about the delay, got a virus of the human kind (flu) but back at it. I have the mbam 1.34 on the flash. however the sUBS link did not work so i only formatted the drive blank.

#6 DaChew

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Posted 17 February 2009 - 08:34 AM

Would you try the sub's disinfector again from the clean computer on the usb drive before using it to bring back a new MBAM log?
Chewy

No. Try not. Do... or do not. There is no try.

#7 I am the Walrus

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Posted 17 February 2009 - 08:02 PM

I am still unable to get anything other than a 'page not found' from the link at post #2. Is there another path or link to get to the disinfector.exe?

#8 DaChew

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Posted 17 February 2009 - 08:27 PM

I have check that link 3 times, it has worked all three for me

Here's one we host now

http://download.bleepingcomputer.com/sUBs/...Disinfector.exe
Chewy

No. Try not. Do... or do not. There is no try.

#9 I am the Walrus

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Posted 17 February 2009 - 08:36 PM

well got the exe file to my desktop but unable to get it to run???a couple of blinks then nada. Suggestions? Am I that illiterate and off course?

#10 DaChew

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Posted 17 February 2009 - 08:39 PM

Your infection is trying to block it

Would you try the sub's disinfector again from the clean computer


You might try renaming it from the infected computer
Chewy

No. Try not. Do... or do not. There is no try.

#11 I am the Walrus

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Posted 17 February 2009 - 08:44 PM

that worked the first time. put it on my desktop and when double-clicked I got the run or save prompt. Ran and saw to hour glasses and then... nothing. do i have a clashing utility?(idk)I must be doing something stupid, huh?

#12 DaChew

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Posted 17 February 2009 - 08:55 PM

I downloaded it to my desktop, renamed it FLDSF.bat

it worked fine

Show Hidden Folders/Files
  • Open My Computer.
  • Go to Tools > Folder Options.
  • Select the View tab.
  • Scroll down to Hidden files and folders.
  • Select Show hidden files and folders.
  • Uncheck (untick) Hide extensions of known file types.
  • Uncheck (untick) Hide protected operating system files (Recommended).
  • Click Yes when prompted.
  • Click OK.
  • Close My Computer.

Chewy

No. Try not. Do... or do not. There is no try.

#13 I am the Walrus

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Posted 17 February 2009 - 11:48 PM

Well here is the log, I hope i didn't screw anything up.

Malwarebytes' Anti-Malware 1.34
Database version: 1749
Windows 5.1.2600 Service Pack 2

2/17/2009 8:01:51 PM
mbam-log-2009-02-17 (20-01-51).txt

Scan type: Quick Scan
Objects scanned: 87247
Time elapsed: 5 minute(s), 41 second(s)

Memory Processes Infected: 3
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 2
Registry Data Items Infected: 3
Folders Infected: 0
Files Infected: 11

Memory Processes Infected:
C:\Documents and Settings\Mufasa\Local Settings\Application Data\lsass.exe (Heuristics.Reserved.Word.Exploit) -> Unloaded process successfully.
C:\Documents and Settings\Mufasa\Local Settings\Application Data\services.exe (Heuristics.Reserved.Word.Exploit) -> Unloaded process successfully.
C:\Documents and Settings\Mufasa\Local Settings\Application Data\winlogon.exe (Heuristics.Reserved.Word.Exploit) -> Unloaded process successfully.

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
(No malicious items detected)

Registry Values Infected:
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\tok-cirrhatus (Heuristics.Reserved.Word.Exploit) -> Quarantined and deleted successfully.
HKEY_USERS\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\tok-cirrhatus (Heuristics.Reserved.Word.Exploit) -> Quarantined and deleted successfully.

Registry Data Items Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell (Backdoor.Bot) -> Data: c:\winnt\eksplorasi.exe -> Quarantined and deleted successfully.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools (Hijack.Regedit) -> Bad: (1) Good: (0) -> Quarantined and deleted successfully.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoFolderOptions (Hijack.FolderOptions) -> Bad: (1) Good: (0) -> Quarantined and deleted successfully.

Folders Infected:
(No malicious items detected)

Files Infected:
C:\WINNT\eksplorasi.exe (Backdoor.Bot) -> Quarantined and deleted successfully.
C:\Documents and Settings\Mufasa\Local Settings\Application Data\csrss.exe (Heuristics.Reserved.Word.Exploit) -> Quarantined and deleted successfully.
C:\Documents and Settings\NetworkService\Local Settings\Application Data\csrss.exe (Heuristics.Reserved.Word.Exploit) -> Quarantined and deleted successfully.
C:\Documents and Settings\Mufasa\Local Settings\Application Data\lsass.exe (Heuristics.Reserved.Word.Exploit) -> Quarantined and deleted successfully.
C:\Documents and Settings\NetworkService\Local Settings\Application Data\lsass.exe (Heuristics.Reserved.Word.Exploit) -> Quarantined and deleted successfully.
C:\Documents and Settings\Mufasa\Local Settings\Application Data\services.exe (Heuristics.Reserved.Word.Exploit) -> Quarantined and deleted successfully.
C:\Documents and Settings\NetworkService\Local Settings\Application Data\services.exe (Heuristics.Reserved.Word.Exploit) -> Quarantined and deleted successfully.
C:\Documents and Settings\Mufasa\Local Settings\Application Data\smss.exe (Heuristics.Reserved.Word.Exploit) -> Quarantined and deleted successfully.
C:\Documents and Settings\NetworkService\Local Settings\Application Data\smss.exe (Heuristics.Reserved.Word.Exploit) -> Quarantined and deleted successfully.
C:\Documents and Settings\Mufasa\Local Settings\Application Data\winlogon.exe (Heuristics.Reserved.Word.Exploit) -> Quarantined and deleted successfully.
C:\Documents and Settings\NetworkService\Local Settings\Application Data\winlogon.exe (Heuristics.Reserved.Word.Exploit) -> Quarantined and deleted successfully.

#14 I am the Walrus

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Posted 20 February 2009 - 12:53 AM

Are you still available to review my possible problem?

#15 DaChew

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Posted 20 February 2009 - 07:23 AM

I apologize for not getting back to you, we were shorthanded and I got distracted.

What is the status of your computer now, did MBAM help?

We need to get it updated and do another scan, the manual definitons are often almost a week behind

:thumbsup:

Edited by DaChew, 20 February 2009 - 07:23 AM.

Chewy

No. Try not. Do... or do not. There is no try.




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