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trying to remove Trojan.DNSchanger


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#1 Apelle

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Posted 27 April 2009 - 08:07 PM

Hi - thanks for taking time to help me

im using windows vista business and i've found my internet connection was really slow and would sometimes just disconnect for no reason so i looked around for help but each time i tried a scanner or something the problem would just return.

i'vs scanned my computer with SUPERantispyware and Malwarebytes Anti-malware and also a-squared in both normal mode and safe mode. a-squared came up with somethings in normal mode which it removed and after i scanned in safe mode it came up clean. both Superantispyware and MBAM came up with the same trojan.DNSchanger when scanned in normal or safe mode. they both said problem would be fixed on reboot but after i rebooted from normal mode to normal mode they were still infected. when i scanned and rebooted from safe mode it wouldnt shut down properly - instead i got the blue screen and the trojan would be there when i tried again.

i've used registryfix and trackeraser pro and ESET nod32 scans clean.

this is the log from SUPERantispyware:
_____________________________________________________________
SUPERAntiSpyware Scan Log
http://www.superantispyware.com

Generated 04/27/2009 at 11:44 PM

Application Version : 4.26.1000

Core Rules Database Version : 3865
Trace Rules Database Version: 1815

Scan type : Quick Scan
Total Scan Time : 01:39:18

Memory items scanned : 338
Memory threats detected : 0
Registry items scanned : 547
Registry threats detected : 2
File items scanned : 29217
File threats detected : 0

Trojan.DNSChanger-Codec
HKCR\videosoft
HKCR\videosoft\CLSID

_________________________________________________________

And the MBAM log after i updated was:
Malwarebytes' Anti-Malware 1.36
Database version: 2051
Windows 6.0.6001 Service Pack 1

28/04/2009 10:58:51 AM
mbam-log-2009-04-28 (10-58-51).txt

Scan type: Quick Scan
Objects scanned: 72532
Time elapsed: 5 minute(s), 42 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 1
Registry Values Infected: 0
Registry Data Items Infected: 0
Folders Infected: 0
Files Infected: 0

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
HKEY_CLASSES_ROOT\videosoft (Trojan.DNSChanger) -> Delete on reboot.

Registry Values Infected:
(No malicious items detected)

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
(No malicious items detected)

Files Infected:
(No malicious items detected)
________________________________________________________


each time i reboot it seems to just be the same.

sorry for the trouble just this is starting to really worry me.

thanks

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#2 quietman7

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Posted 28 April 2009 - 12:58 PM

Some infections are difficult to remove completely because of their morphing characteristics which allows the malware to regenerate itself. Sometimes there is hidden piece of malware which has not been detected by your security tools that protects malicious files and registry keys (which have been detected) so they cannot be permanently deleted. Disinfection will probably require the use of more powerful tools than we recommend in this forum. Before that can be done you will need you to create and post a DDS/HijackThis log for further investigation.

Please read the pinned topic titled "Preparation Guide For Use Before Posting A Hijackthis Log". If you cannot complete a step, then skip it and continue with the next. In Step 6 there are instructions for downloading and running DDS which will create a Pseudo HJT Report as part of its log.

When you have done that, post your log in the HijackThis Logs and Malware Removal forum, NOT here, for assistance by the HJT Team Experts. A member of the Team will walk you through, step by step, on how to clean your computer. If you post your log back in this thread, the response from the HJT Team will be delayed because your post will have to be moved. This means it will fall in line behind any others posted that same day.

Start a new topic, give it a relevant title and post your log along with a brief description of your problem, a summary of any anti-malware tools you have used and a summary of any steps that you have performed on your own. An expert will analyze your log and reply with instructions advising you what to fix. After doing this, we would appreciate if you post a link to your log back here so we know that your getting help from the HJT Team.

Please be patient. It may take a while to get a response because the HJT Team members are very busy working logs posted before yours. They are volunteers who will help you out as soon as possible. Once you have made your post and are waiting, please DO NOT "bump" your post or make another reply until it has been responded to by a member of the HJT Team. Generally the staff checks the forum for postings that have 0 replies as this makes it easier for them to identify those who have not been helped. If you post another response there will be 1 reply. A team member, looking for a new log to work may assume another HJT Team member is already assisting you and not open the thread to respond.
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