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fixing win32/cycbot.b on Vista- now what?


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#1 sigmadeltaE=0

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Posted 21 July 2011 - 05:49 PM

Hi there
I was recently infected with the backdoor trojan win32/cycbot.b on my Windows vista business. I've read up about this virus and am aware of everything it does. I've also had a look at some older forums for disinfecting on Windows 7 and followed some advice from there- I've already changed all internet passwords, fixed my internet settings, and deleted the virus with windows defender (I think). My question is, what should I do now?

I've head that to prevent this virus from coming back, you need to create a new restore point and reinstall your system. What do either of these things mean? How should I do them? Is that even the best solution? I'm computer illiterate and unsure of how to proceed- any advice/explanations/ instructions would be greatly appreciated!

PS- is there a reliable way to determine if the virus is actually gone?

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#2 boopme

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Posted 21 July 2011 - 06:06 PM

Please consider this first.

A backdoor Trojan can allow an attacker to
gain control of the system, log keystrokes, steal passwords, access personal
data, send malevolent outgoing traffic, and close the security warning
messages displayed by some anti-virus and security programs.

I would advise you to disconnect this PC from the Internet, and then go to
a known clean computer and change any passwords or security information held
on the infected computer. In particular, check whatever relates to online
banking financial transactions, shopping, credit cards, or sensitive
personal information. It is also wise to contact your financial institutions
to apprise them of your situation.

We will do our best to clean the computer of any infections seen on the log.
However, because of the nature of this Trojan, I cannot offer a total
guarantee that there are no remnants left in the system, or that the
computer will be trustworthy.

Many security experts believe that once infected with this type of Trojan,
the best course of action is to reformat and reinstall the Operating System.
Making this decision is based on what the computer is used for, and what
information can be accessed from it.

Knowing the above, let us know if you wish to proceed.


To clean..and we;ll do a Restore Point last as you never know if one is needed when removing malware.
System Restore uses restore points to return your system files and settings to an earlier point in time, without affecting personal files. For more information, see What is System Restore?


Reboot into Safe Mode with Networking
How to enter safe mode(XP/Vista)
Using the F8 Method
Restart your computer.
When the machine first starts again it will generally list some equipment that is installed in your machine, amount of memory, hard drives installed etc. At this point you should gently tap the F8 key repeatedly until you are presented with a Windows XP Advanced Options menu.
Select the option for Safe Mode with Networking using the arrow keys.
Then press enter on your keyboard to boot into Safe Mode
.





Next run Superantisypware (SAS):

Download and scan with SUPERAntiSpyware Free for Home Users
  • Double-click SUPERAntiSpyware.exe and use the default settings for installation.
  • An icon will be created on your desktop. Double-click that icon to launch the program.
  • If asked to update the program definitions, click "Yes". If not, update the definitions before scanning by selecting "Check for Updates". (If you encounter any problems while downloading the updates, manually download them from here. Double-click on the hyperlink for Download Installer and save SASDEFINITIONS.EXE to your desktop. Then double-click on SASDEFINITIONS.EXE to install the definitions.)
  • In the Main Menu, click the Preferences... button.
  • Click the Scanning Control tab.
  • 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.
  • Back on the main screen, under "Scan for Harmful Software" click Scan your computer.
  • On the left, make sure you check C:\Fixed Drive.
  • On the right, under "Complete Scan", choose Perform Complete Scan.
  • Click "Next" to start the scan. Please be patient while it scans your computer.
  • After the scan is complete, a Scan Summary box will appear with potentially harmful items that were detected. Click "OK".
  • Make sure everything has a checkmark next to it and click "Next".
  • A notification will appear that "Quarantine and Removal is Complete". Click "OK" and then click the "Finish" button to return to the main menu.
  • If asked if you want to reboot, click "Yes".
  • 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.
If you have a problem downloading, installing or getting SAS to run, try downloading and using the SUPERAntiSpyware Portable Scanner instead. Save the randomly named file (i.e. SAS_1710895.COM) to a usb drive or CD and transfer to the infected computer. Then double-click on it to launch and scan. The file is randomly named to help keep malware from blocking the scanner.


Now reboot to Normal and run MBAM (MalwareBytes):

Please download Malwarebytes Anti-Malware and save it to your desktop.
Download Link 1
Download Link 2MBAM 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. Temporarily disable such programs or permit them to allow the changes.
  • Make sure you are connected to the Internet.
  • Double-click on mbam-setup.exe to install the application.
    For instructions with screenshots, please refer to the How to use Malwarebytes' Anti-Malware Guide.
  • 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 definition 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. Be sure to post the complete log to include the top portion which shows MBAM's database version and your operating system.
  • Exit MBAM when done.
Note: If MBAM encounters a file that is difficult to remove, you will be asked to reboot your computer so MBAM can proceed with the disinfection process. If asked to restart the computer, please do so immediately. Failure to reboot normally (not into safe mode) will prevent MBAM from removing all the malware.

Troubleshoot Malwarebytes' Anti-Malware

Please ask any needed questions,post logs and Let us know how the PC is running now.
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#3 sigmadeltaE=0

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Posted 24 July 2011 - 09:44 PM

Thank you for the advice- I definitely do want to try and completely reinstall the computer. Just a few questions before I proceed with the tools you gave me- if I'm unsure weather or not the virus is gone, how much do I put myself at risk when I go online to download the cleaning software? Can the software be downloaded to a clean computer and transferred to mine externally?
Thanks

#4 chromebuster

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Posted 24 July 2011 - 09:55 PM

Yes it can. if you have a flash drive around, you can run the software from a flash drive, and most of the time, that works. You can also use an external hard drive, but I would use a flash drive that's not used very much after an infection of this type. But remember that you'll have to be on the internet to allow the softwares to update whether you installed them from a flash drive or from your internal hard drive because the updates are still online.

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#5 sigmadeltaE=0

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Posted 04 August 2011 - 05:05 PM

Thanks for the advice! Hopefully this will work




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