Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.


Windows 7: Virus Help

12 Apr 2013   #1
Breakyorself

Windows 7 home premium 64 bit
 
 
Virus Help

Okay, so recently I've been reinstalling a lot of stuff after my computer reset and it seems I've gotten a really, really, really, really, really, horrible virus.

It doesn't do much other than play annoying ads in the background which if I mute just restarts a minute later.

But it somehow found it's way into the legitimate windows/system32/svchost.exe

I know this, because Avast says so and it's able to play these annoying ads before the computer is logged on/is still booting up. Avast isn't able to do anything except warn me of it considering it's in the real svchost.

Is there any possible way of fixing this considering it's in such a crucial file that I can't just end or delete it?


My System SpecsSystem Spec
12 Apr 2013   #2
VistaKing

Windows 7 Ultimate 32-Bit & Windows 7 Ultimate 64-Bit
 
 

Hi Breakyorself

Download AdwCleaner

download

Save to the Desktop

Right-click on adwcleaner.exe and choose Run as administrator

Click the Search button

Upload the AdwCleaner[Sn].txt in your reply.

Note   Note
The log file is at C:\AdwCleaner[Sn].txt
My System SpecsSystem Spec
12 Apr 2013   #3
Breakyorself

Windows 7 home premium 64 bit
 
 

Here


Attached Files
File Type: txt AdwCleaner[R1].txt (3.9 KB, 8 views)
My System SpecsSystem Spec
12 Apr 2013   #4
VistaKing

Windows 7 Ultimate 32-Bit & Windows 7 Ultimate 64-Bit
 
 

Breakyorself


Run the Delete

Close all open programs.
To run the program, right-click AdwCleaner.exe and select "Run as Administrator
Click on Delete and confirm the prompt.
After it finishes, the computer is restarted.

Upload the log saved at C:\AdwCleaner[S1].txt
My System SpecsSystem Spec
12 Apr 2013   #5
Breakyorself

Windows 7 home premium 64 bit
 
 

Sadly, this also recreated another BSOD error for me :|.


Attached Files
File Type: txt AdwCleaner[R2].txt (4.0 KB, 2 views)
My System SpecsSystem Spec
12 Apr 2013   #6
VistaKing

Windows 7 Ultimate 32-Bit & Windows 7 Ultimate 64-Bit
 
 

Open up the AdwCleaner application . Right click choose Run as administrator click on Delete . The report says you pressed search
My System SpecsSystem Spec
12 Apr 2013   #7
Breakyorself

Windows 7 home premium 64 bit
 
 

Sorry, I did hit delete I just uploaded the wrong one.


Attached Files
File Type: txt AdwCleaner[S1].txt (3.9 KB, 2 views)
My System SpecsSystem Spec
12 Apr 2013   #8
VistaKing

Windows 7 Ultimate 32-Bit & Windows 7 Ultimate 64-Bit
 
 

Restart the PC and run Malwarebytes

Run Malwarebytes

Note   Note
Click on Malwarebytes to download

When the installation is done uncheck Enable free trial of Malwarebytes (see image below )



Update the definitions and do a full scan

:ADDED: Another tool we could run


Download Farbar Recovery Scan Tool from below on a non infected PC
For 32-bit (x86) systems download
Farbar Recovery Scan Tool and save it to a flash drive.
For 64-bit (x64) systems download
Farbar Recovery Scan Tool x64 and save it to a flash drive.

Plug the flashdrive into the infected PC.

Enter System Recovery Options.

To enter System Recovery Options from the Advanced Boot Options:
Restart the computer.
As soon as the BIOS is loaded begin tapping the F8 key until Advanced Boot Options appears.
Use the arrow keys to select the Repair your computer menu item.
Select US as the keyboard language settings, and then click Next.
Select the operating system you want to repair, and then click Next.
Select your user account an click Next.

To enter System Recovery Options by using Windows installation disc:
Insert the installation disc.
Restart your computer.
If prompted, press any key to start Windows from the installation disc. If your computer is not configured to start from a CD or DVD, check your BIOS settings.
Click Repair your computer.
Select US as the keyboard language settings, and then click Next.
Select the operating system you want to repair, and then click Next.
Select your user account and click Next.

On the System Recovery Options menu you will get the following options:
Startup Repair

System Restore

Windows Complete PC Restore

Windows Memory Diagnostic Tool

Command Prompt

Select Command Prompt

In the command window type e:\frst.exe (for x64 bit version type e:\frst64) and press Enter
Note   Note
Replace letter e with the drive letter of your flash drive.

Tip   Tip
Type the commands below to see what your letter is for the USB drive and press ENTER after each command

Code:
Diskpart
List volume
The tool will start to run.
When the tool opens click Yes to disclaimer.
Press Scan button.
FRST will let you know when the scan is complete and has written the FRST.txt to file, close out this message, then type the following into the search box:
services.exe
Now press the Search button
When the search is complete, search.txt will also be written to your USB
Type exit and reboot the computer normally
Please copy and paste both logs in your reply.(FRST.txt and Search.txt)
My System SpecsSystem Spec
12 Apr 2013   #9
cottonball

Windows 7 Home Premium
 
 

Breakyorself,

We need to check for possible Zero Byte Partition/Master Boot Record infection.

Is it possible for you to provide the latest avast! Scan Log?

Also, let's see what your system shows with the following short scan...
You can do this scan before doing the Farbar Recovery Scan Tool scan above, if you wish.

Please download RogueKiller:
Tlcharger RogueKiller (Site Officiel)

When you get to the website, go to where it says:
(Download link) Lien de téléchargement:
Select the x64 version for your 64-bit system.
Click the dark-blue button to download.
Save to the Desktop.

Close all windows and browsers.
Right-click and select: Run as Administrator

At the program console, wait for the prescan to finish. (Under Status, it says: Prescan finished.)
Press: SCAN

When done, a report opens on the Desktop: RKreport.txt

Please provide the RKreport.txt (Mode: Scan) in your reply.
My System SpecsSystem Spec
12 Apr 2013   #10
Jacee
Microsoft MVP

Windows 7 Ultimate 32bit SP1
 
 

Sounds like a "Bootkit" whistler infection ... TDSSKiller may help, but I'll leave you in the hands of Cottonball because I don't recommend just 'cleaning' this type of infection.

Quote:
Bootkits
A kernel-mode rootkit variant called a bootkit is used predominantly to attack full disk encryption systems, for example as in the "Evil Maid Attack", in which a bootkit replaces the legitimate boot loader with one controlled by an attacker; typically the malware loader persists through the transition to protected mode when the kernel has loaded.[35][36][37][38] For example, the "Stoned Bootkit" subverts the system by using a compromised boot loader to intercept encryption keys and passwords.[39] More recently, the Alureon rootkit has successfully subverted the requirement for 64-bit kernel-mode driver signing in Windows 7 by modifying the master boot record.[40]
The only known defenses against bootkit attacks are the prevention of unauthorized physical access to the system—a problem for portable computers—or the use of a Trusted Platform Module configured to protect the boot path.[41]
Source: http://en.wikipedia.org/wiki/Rootkit
My System SpecsSystem Spec
Reply

 Virus Help




Thread Tools




Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

© Designer Media Ltd

All times are GMT -5. The time now is 07:55 PM.
Twitter Facebook Google+



Windows 7 Forums

Seven Forums Android App Seven Forums IOS App