Help with MBR:\\.\PHYSICALDRIVE0\Partion4

Viruses and worms
1

Hi. My avast scan results show an infection with MBR:\.\PHYSICALDRIVE0\Partion4. Also, the vaio care program keeps popping up.
Help please?

:slight_smile:

2

Please attach your logs. (MBAM, OTL and aswMBR…!!)
Instructions: http://forum.avast.com/index.php?topic=53253.0

3

Monitoring…

4

Thank you.
Logs are attached.

5

03:56:34.284 Disk 0 Partition 4 INFECTED MBR:SST [Rtk]
03:56:34.315 Disk 0 MBR [SST] *ROOTKIT
[2014/03/03 12:07:04 | 000,067,584 | --S- | M] () – C:\Windows\bootstat.dat

Not good.

6

http://forum.avast.com/index.php?topic=147045.msg1067560#msg1067560

There is not only the rootkit, also the conduit malware and the person is using a very unsecure browser.

7

Hi,

Let’s first get rid of that rootkit.

Download TDSSKiller and save it to your desktop

Execute TDSSKiller.exe by doubleclicking on it.
Confirm “End user Licence Agreement” and “KSN Statement” dialog box by clicking on Accept button.

[*] Press Start Scan
[*] If Suspicious object is detected, the default action will be Skip, click on Continue.
[*] If Malicious objects are found, select Cure.

Once complete, a log will be produced at the root drive which is typically C:\ ,for example, C:\TDSSKiller.<version_date_time>log.txt

Please post the contents of that log in your next reply.

8

hi,
tdss killer asked to reboot after first scan.
logs attached

9

Looking good :slight_smile:

Rootkit should be gone now :slight_smile:

  1. Please download ComboFix by sUBs from here and save it to your Desktop.
    If you are unsure how ComboFix works please read this guide carefully.
    Note: ComboFix must be downloaded to your Desktop.
  1. Temporarily disable your AntiVirus program, usually via a right click on the System Tray icon. They may interfere with Combofix.
    If you are unsure how to do this please read this or this Instruction.

Instructions how to disable avast:

[*]Right click on the avast! system tray icon (
http://www.mcshield.net/pg/images/avast5.png
) in the lower right corner of the screen and scroll up to avast! shield controls;
[*]In the menu that appears, choose Disable Permanently. When you are prompted to turn off security, click Yes.

Note: Do not forget to turn back on this option after the cleaning by choosing avast! shield controls > Enable all shield options.

  1. Run ComboFix. Click on I Agree!

[i][size=7pt]- ComboFix will display DISCLAIMER of warranty on software.
By clicking I Agree ComboFix shall continue.

  • ComboFix will check if there is a newer version of ComboFix available.
    Click Yes if prompted to download.[/size]
    -If Recovery Console is not installed, ComboFix will offer download & installation.
    Click Yes to allow ComboFix to install Recovery Console.
  • ComboFix will scan your computer in stages, total of 50 stages.
    Do not mouse-click around while ComboFix is running.
    Note:If you see a message like “Illegal operation attempted on a registry key that has been marked for deletion” just restart your computer.
    [/i]
  1. When the tool is finished, it will produce a log report for you. (typical location: C:[b]ComboFix.txt[/b] )
    Attach log reports ( ComboFix.txt) back to topic.
10

great to hear that, thanks so much! ;D
here’s the combofix log

11

PC seems clean now, do you still experience any problem?

12

the vaio care app kept on popping up so i tried to disable it in task scheduler. but it was persistent. so i uninstalled it. then after the restart, the blue screen appeared. then i rebooted it once, but blue screen still. then i turned it off and took out the battery. then i turned it on just now…and it’s okay and i’m using it.

should i be worried? there were blue screen episodes, after all…
:-\

13

Monitor the situation and let me know do you still have some problems?

14

no problems so far.

thank you for your help :slight_smile:

15

Ok, then we can remove used tools :slight_smile:

• The following will implement some post-cleanup procedures:

=> Please download DelFix by Xplode to your Desktop.

Run the tool and check the following boxes below;
[i]
http://www.mcshield.net/personal/magna86/Images/checkmark.png
Remove disinfection tools

http://www.mcshield.net/personal/magna86/Images/checkmark.png
Create registry backup

http://www.mcshield.net/personal/magna86/Images/checkmark.png
Purge System Restore [/i]
Click Run button and wait a few seconds for the programme completes his work.
At this point all the tools we used here should be gone. Tool will create an report for you (C:[b]DelFix.txt[/b])

The tool will also record healthy state of registry and make a backup using ERUNT program in %windir%\ERUNT\DelFix
Tool deletes old system restore points and create a fresh system restore point after cleaning.

16

Hi, it’s done.
Thanks so much :slight_smile: