Downloader-PKU, Malware-gen

Viruses and worms
1

My computer crashed yesterday with the virus that “locks” your computer unless you pay x amount, managed to get back in, do an avast boot scan, which took care of much of the virus, but it just doesn’t want to go away completely.

MBAM log below, and OTL and aswMBR log attached.

Appreciate the help

MBAM log:
Malwarebytes Anti-Malware (Trial) 1.62.0.1300
www.malwarebytes.org

Database version: v2012.07.20.06

Windows 7 Service Pack 1 x64 NTFS
Internet Explorer 9.0.8112.16421
Twinkle :: GANDALF [administrator]

Protection: Enabled

20/07/2012 18:02:39
mbam-log-2012-07-20 (18-02-39).txt

Scan type: Quick scan
Scan options enabled: Memory | Startup | Registry | File System | Heuristics/Extra | Heuristics/Shuriken | PUP | PUM
Scan options disabled: P2P
Objects scanned: 207498
Time elapsed: 48 second(s)

Memory Processes Detected: 0
(No malicious items detected)

Memory Modules Detected: 0
(No malicious items detected)

Registry Keys Detected: 0
(No malicious items detected)

Registry Values Detected: 0
(No malicious items detected)

Registry Data Items Detected: 0
(No malicious items detected)

Folders Detected: 0
(No malicious items detected)

Files Detected: 1
C:\Windows\Installer{2516c83b-21bf-7f4d-0abf-c6cb590676d2}\U\00000008.@ (Trojan.Dropper.BCMiner) → Quarantined and deleted successfully.

(end)

Edit: OTL does not seem to open/save an Extras.Txt file

2

Warning This fix is only relevant for this system and no other, using on another computer may cause problems

Be advised that when the fix commences it will shut down all running processes and you may lose the desktop and icons, they will return on reboot

Run OTL

[*]Under the Custom Scans/Fixes box at the bottom, paste in the following

https://dl.dropbox.com/u/73555776/OTL_Fix.GIF

:OTL [2012/07/19 16:55:33 | 000,000,000 | ---D | C] -- C:\ProgramData\gylerfxghkedker [2012/07/19 16:55:01 | 000,000,000 | ---D | C] -- C:\Users\Twinkle\AppData\Roaming\Zioxk [2012/07/19 16:55:01 | 000,000,000 | ---D | C] -- C:\Users\Twinkle\AppData\Roaming\Uzcos [2012/07/19 16:55:01 | 000,000,000 | ---D | C] -- C:\Users\Twinkle\AppData\Roaming\Ewqoix [2012/07/19 16:55:26 | 000,000,051 | ---- | C] () -- C:\ProgramData\jqhvkkvlzbjefbv

:Files
ipconfig /flushdns /c
C:\Windows\assembly\GAC_32\Desktop.ini
C:\Windows\assembly\GAC_64\Desktop.ini
C:\Windows\Installer{2516c83b-21bf-7f4d-0abf-c6cb590676d2}

:Commands
[purity]
[resethosts]
[emptytemp]
[CREATERESTOREPOINT]
[Reboot]


[*]Then click the Run Fix button at the top
[*]Let the program run unhindered, reboot the PC when it is done
[*]Open OTL again and click the Quick Scan button. Post the log it produces in your next reply.

THEN

Download and Install Combofix

Download ComboFix from one of the following locations:
Link 1
Link 2

VERY IMPORTANT !!! Save ComboFix.exe to your Desktop

  • IMPORTANT - Disable your AntiVirus and AntiSpyware applications, usually via a right click on the System Tray icon. They may otherwise interfere with our tools. If you have difficulty properly disabling your protective programs, refer to this link here

[*]Double click on ComboFix.exe & follow the prompts.
[*]Accept the disclaimer and allow to update if it asks

http://img.photobucket.com/albums/v706/ried7/NSIS_disclaimer_ENG.png

http://img.photobucket.com/albums/v706/ried7/NSIS_extraction.png

[*]When finished, it shall produce a log for you.
[*]Please include the C:\ComboFix.txt in your next reply.

Notes:

  1. Do not mouse-click Combofix’s window while it is running. That may cause it to stall.
  2. Do not “re-run” Combofix. If you have a problem, reply back for further instructions.
  3. If after the reboot you get errors about programmes being marked for deletion then reboot, that will cure it.

Please make sure you include the combo fix log in your next reply as well as describe how your computer is running now

3

Thank you
it all seems to run smoothly now, avast nor MBAM finds anything now.

I have attached the ComboFix log also.

I am not sure if this is related to the virus, but in my Avast I am not able to do a normal scan, under the Scan Computer > Scan Now, the page is just blank, i can set up a boot scan though.

4

OK lets repair Avast

Go to Control Panel > Programs and Features
Select Avast
On the left select Repair

https://dl.dropbox.com/u/73555776/repair%20avast.GIF

Reboot on completion

How is the computer behaving now ?

5

The repair didn’t work, so instead of just re-installed avast, and now it works fine

Thanks again for all the help.

6

Any further problems before I remove my tools ?

7

No that is it for now.

8

Subject to no further problems :slight_smile:

I will remove my tools now and give some recommendations, but, I would like you to run for 24 hours or so and come back if you have any problems

Now the best part of the day ----- Your log now appears clean :thumbsup:

A good workman always cleans up after himself so…The following will implement some cleanup procedures as well as reset System Restore points:

Run OTL
[*]Under the Custom Scans/Fixes box at the bottom, paste in the following

:Commands [resethosts] [emptytemp] [Reboot]

[*]Then click the Run Fix button at the top
[*]Let the program run unhindered, reboot the PC when it is done

Remove ComboFix

[*]Hold down the Windows key + R on your keyboard. This will display the Run dialogue box
[*]In the Run box, type in ComboFix /Uninstall (Notice the space between the “x” and “/”) then click OK

http://i1224.photobucket.com/albums/ee362/Essexboy3/Misc%20screen%20shots/CF_Uninstall-1.jpg

[]Follow the prompts on the screen
[]A message should appear confirming that ComboFix was uninstalled

Run OTL and hit the cleanup button. It will remove all the programmes we have used plus itself.

We will now confirm that your hidden files are set to that, as some of the tools I use will change that

[*]Go to control panel
[*]Select folder options (Appearance > Folder options in category view)
[*]Select the View Tab.
[*]Under the Hidden files and folders heading select Do not show hidden files and folders.
[]Click Yes to confirm.
[]Click OK.

SPRING CLEAN

To manually create a new Restore Point

[*]Go to Control Panel and select System
[*]Select System
[*]On the left select System Protection and accept the warning if you get one
[*]Select System Protection Tab
[*]Select Create at the bottom
[*]Type in a name i.e. Clean
[*]Select Create

Now we can purge the infected ones

[*]GoStart > All programs > Accessories > system tools
[*]Right click Disc cleanup and select run as administrator
[*]Select Your main drive and accept the warning if you get one
[*]For a few moments the system will make some calculations
[*]Select the More Options tab
[*]In the System Restore and Shadow Backups select Clean up
[*]Select Delete on the pop up
[]Select OK
[]Select Delete

Now that you are clean, to help protect your computer in the future I recommend that you get the following free programmes:

http://img233.imageshack.us/img233/7729/mbamicontw5.gif

Malwarebytes. Update and run weekly to keep your system clean

Download and install FileHippo update checker and run it monthly it will show you which programmes on your system need updating and give a download link

It is critical to have both a firewall and anti virus to protect your system and to keep them updated. To keep your operating system up to date visit

[*]Microsoft Windows Update

To learn more about how to protect yourself while on the internet read our little guide How did I get infected in the first place ?

Keep safe :wave: