QUOTE OF THE DAY

Tuesday, June 26, 2007

Clean your PC from W32/Sohana-R Worm Manually!

Hi !

The virus under discussion and the other variants of the same are basically different types of the W32/Sohana-R worm. It disables the Task Manager, CMD, Registry Editor and some processes with the similar name to the windows service SVCHOST.exe. It is usually spread by the removable media storage devices like USB Flash drives.

Following are some of the names which are used by this worm to manipulate your PC integrity. SSVICHOSST.EXE, SVICHOSSST.EXE, RVHOST.EXE, SVICHOSST.EXE, etc.

As far as I know, this worm goes undetected and/or uncleaned by most commercial anti virus softwares. I am referring a couple of very good tools using which you can easily remove the virus.

To manually remove the virus from your system use the following directions.

1) There are two main software tools. One is the procexp which is a third party task manager and much more powerful than the default windows task manager. The other is a batch file. EmergencyVirusFix.bat

2) Use this third party task manager to find that process.

3) You will find a couple (maybe more) of tasks currently run with the above mentioned names or similar. Note the spelling of the task and kill all the instances.

4) Now Edit the batch file after uncompressing it from the rar file. Replace the file name with the process name you just killed.

5) Run the batch file. This will enable the Task Manager, CMD (command prompt), Folder Options and Registry Editor.

6) Now Run the registry Editor and find all the keys with the name of the processor.

7) Usually it copies in the RUN and SHELL keys with tricky names. You will have to delete all the keys except the shell which is altered in the following way:
"EXPLORER.EXE SSVICHOSST.EXE". Modify this key to just EXPLORER.EXE and remove all the extra.

8) After removing all the registry keys your system is clean. Note that the file is still there and can not be accessed in normal way. You have to install a good anti-virus to remove the file.

9) Now the most important step of your virus removing mission. Install a good anti virus e.g.
* Kaspersky ( I recommend this)
* BitDefender
* AVG
* McAfee
* PandA AV
* NOD32
* PC Cilin

Check the following sites:
http://anti-virus-software-review.toptenreviews.com/
http://www.consumersearch.com/www/software/antivirus-software/
http://www.pcworld.com/article/id,124475-page,1/article.html

I have made a very simple sequence to clean the system. If you still need any help; just contact me.

Download the archived file from:

http://files.filefront.com//;6793648;;/
http://www.megaupload.com/?d=3GVNDB2D



Ref: http://www.putera.com/tanya/lofiversion/index.php/t32227.html

47 comments:

Anonymous said...

Nice Tips.
I found them useful.
I have AVG Anti Virus; Should I change my Anti-Virus Software?

Kamran said...

Thanks for appreciation.
Good to see someone finding my stuff helpful.

AFAIK the best anti-virus software is Kaspersky Antivirus.

http://www.kaspersky-labs.com
Refer to the following links for more information:


Best Regards,

Kamran said...

http://anti-virus-software-review.toptenreviews.com/
http://www.consumersearch.com/www/software/antivirus-software/
http://www.pcworld.com/article/id,124475-page,1/article.html

Anonymous said...

Quite Useful Tips.

Anonymous said...

Hi,

My Win 2000 Server has been infected with this worm. Will your write-up on manually removing this virus be helpful for my server as well ? Will the procedures be the same ?

Kamran said...

@lasr

I am sorry brother.I should have mention that it works best with WinXP. This doesn't completely work on Windows 2000 machines. The incompatible stuff being the reg command used to enable the registry editor and task manager.
You can still kill the process using the third party task manager procexp.

Then you just have to enable the registry editor. In windows XP it is relatively easy using command line (as in the batch file). If you can alternative way to modify the registry keys as in the batch file using REG command, the same procedure will work.

Try by making a file with .reg extension and using regedit as is done in modifying the registry keys using .reg files.

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Anonymous said...

hi kamran,
i tried, what u have written in your manual removal of the W32/Sohana-R Worm, but the worm is not detected by the antivirus in your step no 9. It will get active every time i start the machine. please help me out of this. i have win xp ad norton antivirus installed on my machine.

Kamran said...

Hi!
I thought this virus should be obsolete by now. :)
But anyhow, the thing is Norton Antivirus has a history of not detecting these kind of virii. I will recommend Bit Defender or Kaspersky because they catch nearly every virus.

Now back to your problem, I think if you have cleaned your RUN or RUNONCE blocks of registry by removing all suspicious registry entries (i.e. step 8), then no suspicious process should be able to run at the reboot. Kindly double check again and see if it works. There is another folder at the program menu called Startup. Perhaps there is something is there which starts whenever u restart.

Good Luck.
Best Regards

Unknown said...

hi kamran,
thanx a lot for your help.
there was a folder remaining in the shell which was invoking dat virus every time on startup. i was not detected it through regitry editer. then i installed autorun from the thread http://technet.microsoft.com/en-us/sysinternals/bb963902.aspx
and delete that one. now it is ok.
thanx once again.

Kamran said...

Cheers mate!
I'm glad that I was of any help.
Yeah these autoruns and autorunsc are good tools.
Its always better to have some third party tools like these autoruns and process xp..

Anonymous said...

Hello,Kamran

thank you very much for such useful advice, it seems to me that everything is ok with my windows xp now. My nod32 detected a kind of autorunini file finally (I don't remember exactly now) and I think that it was the original place from where all the problems started.

best wishes from Odessa, Ukraine, the Black Sea :-)

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