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Infection: redirects, overall slowness, reader_s, other problems


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#1 gsk111

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Posted 06 July 2009 - 09:21 PM

I believe I am infected with something and can't get rid of it. I ran Malwarebytes in Safe Mode and it found several infections like reader_s.exe but they keep coming back along with other symptoms.

Some of the problems I seen so far:

-Searches redirect to ad sites

-Some sites cannot be opened at all (especially sites that have to do with anti-virus instructions)

-Cannot download some files (again especially ones that known anti-malware programs)

-My Computer shows I have 4 CD drives (I have one CD drive and one DVD drive that is no longer visible)

-Fake virus alerts

-Overall slowness

Hope someone can help.

Thank you.

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#2 DaChew

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Posted 06 July 2009 - 09:37 PM

Reader_s.exe is associated with virut, a basically incurable file infector, it's often associated with some very nasty rootkits and backdoor trojans.

http://www.bleepingcomputer.com/forums/t/239042/inexperienced-computer-user/
Chewy

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#3 gsk111

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Posted 06 July 2009 - 10:09 PM

Well it looke like I'm going to have reinstall the OS. Sorry but as a computer novice how do I go about doing that? Many of the instruction sites are being blocked by this thing.

Is it safe to try to save any of my files? Like jpegs, word docs, excel files, etc?

#4 DaChew

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Posted 06 July 2009 - 10:24 PM

You'll probably need to use a clean computer to read up on the infection

Are you sure about the reader_s file?

Your system is infected with a nasty variant of Virut, a polymorphic file infector with IRCBot functionality which infects .exe, .scr files, downloads more malicious files to your system, and opens a back door that compromises your computer. According to this Norman White Paper Assessment of W32/Virut, some variants can infect the HOSTS file and block access to security related web sites. URL=http://blog.trendmicro.com/virux-cases-escalate/]Virux[/URL] is an even more complex file infector which can embed an iframe into the body of web-related files and infect script files (.php, .asp, and .html). When Virut creates infected files, it also creates non-functional files that are corrupted beyond repair. In many cases the infected files cannot be disinfected properly by your anti-virus. When disinfection is attempted, the files become corrupted and the system may become irreparable.

The virus has a number of bugs in its code, and as a result it may misinfect a proportion of executable files....some W32/Virut.h infections are corrupted beyond repair.

McAfee Risk Assessment and Overview of W32/Virut

There are bugs in the viral code. When the virus produces infected files, it also creates non-functional files that also contain the virus...Due to the damaged caused to files by virut it's possible to find repaired but corrupted files. They became corrupted by the incorrect writing of the viral code during the process of infection. undetected, corrupted files (possibly still containing part of the viral code) can also be found. this is caused by incorrectly written and non-function viral code present in these files.

AVG Overview of W32/VirutThis kind of infection is contracted and spread by visiting remote, crack and keygen sites. These type of sites are infested with a smörgåsbord of malware and an increasing source of system infection. However, the CA Security Advisor Research Blog says they have found MySpace user pages carrying the malicious Virut URL. Either way you can end up with a computer system so badly damaged that recovery is not possible and it cannot be repaired. When that happens there is nothing you can do besides reformatting and reinstalling the OS.

...warez and crack web pages are being used by cybercriminals as download sites for malware related to VIRUT and VIRUX. Searches for serial numbers, cracks, and even antivirus products like Trend Micro yield malcodes that come in the form of executables or self-extracting files...quick links in these sites also lead to malicious files. Ads and banners are also infection vectors...

Keygen and Crack Sites Distribute VIRUX and FakeAV

If your computer was used for online banking, has credit card information or other sensitive data on it, you should disconnect from the Internet until your system is cleaned. All passwords should be changed immediately to include those used for banking, email, eBay, paypal and online forums. You should consider them to be compromised. You should change each password using a clean computer and not the infected one. If not, an attacker may get the new passwords and transaction information. If using a router, you need to reset it with a strong logon/password so the malware cannot gain control before connect again. Banking and credit card institutions should be notified of the possible security breach. Because your computer was compromised please read:There is no guarantee this infection can be completely removed. In some instances it may have caused so much damage to your system that it cannot be completely cleaned or repaired. The malware may leave so many remnants behind that security tools cannot find them. Many experts in the security community believe that once infected with this type of malware, the best course of action is to wipe the drive clean, reformat and reinstall the OS. Reinstalling Windows without first wiping the entire hard drive with a repartition and/or format will not remove the infection. The reinstall will only overwrite the Windows files. Any malware on the system will still be there afterwards. Please read:
Chewy

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#5 gsk111

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Posted 07 July 2009 - 08:49 AM

Yes, unfortunately that appears to be the case. Malwarebytes found that file everytime. And now things have gone from bad to worse. I cannot fully boot up windows anymore. I get to the log on screen and get a svchost.exe application error. "...Memory could not be written". I can go no further from there. I try to boot from my Windows CD but I am taken to the same page and error.

Any suggestions?
Thanks.

#6 DaChew

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Posted 07 July 2009 - 08:54 AM

Have you been into bios and changed the boot order to boot to the CD. Is the CD bootable?

What's the make and model of your computer?

You might want to start a new thread in our XP? forum for this problem, recovering some data and reloading your computer?
Chewy

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#7 gsk111

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Posted 07 July 2009 - 09:17 AM

UPDATE--Ok, so I was able to get into the BIOS to boot from the CD. Had to basically take the HD out for it to work. XP is recovering right now. But from what I've been reading it sounds like I'll still have to reformat and reinstall even after I've recovered given the nastiness of this bug.

Make and model - Dell Dimension 4700, Win XP Pro

Edited by gsk111, 07 July 2009 - 09:22 AM.


#8 DaChew

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Posted 07 July 2009 - 09:33 AM

I'll still have to reformat and reinstall even after I've recovered given the nastiness of this bug.


That's for sure, but the recovery might enable you to rescue some data. However the best way to do that is boot to a linux CD
and transfer to a usb drive.
Chewy

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#9 gsk111

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Posted 07 July 2009 - 11:38 AM

Well that didn't work. Failed on repair. Looking for a file to install then just stalls. I've got a thread open in another forum. Hopefully someone can help there.

#10 gsk111

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Posted 24 July 2009 - 03:29 PM

I have one more question if anyone is out there listening. I ended up just purchasing a new computer, it was time to upgrade. I want to get a few files off the infected computer. I have a cable which allows me to mount the harddrive as an external drive via USB. Does anyone know or think I could run a risk of infecting the new computer just by attaching the drive?

#11 DaChew

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Posted 24 July 2009 - 05:50 PM

Does anyone know or think I could run a risk of infecting the new computer just by attaching the drive?


Most definitely, you can take several precautions tho.

Holding down the shift key when you connect the drive will keep autoplay from engaging.

or

Disable autoruns

http://miekiemoes.blogspot.com/2008/11/ple...torun-asap.html

for vista this seemed the best option

http://www.howtogeek.com/howto/windows-vis...-windows-vista/

and very important, have a good antivirus, fully updated running resident protection

Also make sure you have file extensions set to show and have a good idea about what Virut may have infected, which involves a lot of different files.

Edited by DaChew, 24 July 2009 - 05:54 PM.

Chewy

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