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System Check

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#1 rob1500


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Posted 08 February 2012 - 02:17 AM

I have followed all the directions for removing the System Check virus, including running rkill, running tdsskiller and using malware product to find and remove
the offending software.

however, when i reboot after all of this, the virus just returns.

i could really use some help here...i have been able to remove viruses in the past, but this one is
just too sticky for me.

thanks in advance,


Edited by hamluis, 08 February 2012 - 05:48 AM.
Moved from XP to Am I Infected.

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#2 hamluis



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Posted 08 February 2012 - 05:48 AM

I believe that the BC instructions for removing/nullifying said malware item...also include instructions on what to do if problems persist.

Since I don't have the guide before me, I cannot be sure and I will move your topic to an appropriate malware forum.


#3 rob1500

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Posted 09 February 2012 - 04:09 AM

i was going to update my original post, but have no idea how to find that post.
EDIT: I merged this with your Origial post.

anyway, the instructions as given on this site did not kill my system check infection. by reading through the logs i discovered a
few additional techniques that, added to the original instructions, worked for me.

in short -

1 download and run rkill. this stops the system check process
2 download and run tdsskiller (from kapersky). this found 1 root kit and eliminated it.
3 go to the eset.com and run the online scan. it found a java/trojandownloadagent and two Kryptic.AAEWtrojan variants. it removed them both. these viruses were not found by the malware removal product.
4 i then ran the malware product which also found a bunch of other viruses and killed them.

5 i then re-ran the entire procedure and rebooted.

6 i had to use the unhide.exe program to make all the files visible again.

what a pain. this took the better part of 48 hours to research and finally fix. thankfully it is working for now, if there are some other cleanup steps that i should be doing, please, please let me know when you can.

it looks to me like System Check is being somehow bundled w this Kryptic trojan, which replicates itself and then somehow recreates the System Check. at least that is my non-technical hypothesis.


Edited by boopme, 09 February 2012 - 11:31 PM.

#4 boopme


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Posted 09 February 2012 - 11:33 PM

If there are no more problems or signs of infection, you should Create a New Restore Point to prevent possible reinfection from an old one. Some of the malware you picked up could have been saved in System Restore. Since this is a protected directory your tools cannot access to delete these files, they sometimes can reinfect your system if you accidentally use an old restore point. Setting a new restore point AFTER cleaning your system will help prevent this and enable your computer to "roll-back" to a clean working state.

The easiest and safest way to do this is:
  • Go to Start > Programs > Accessories > System Tools and click "System Restore".
  • Choose the radio button marked "Create a Restore Point" on the first screen then click "Next". Give the R.P. a name, then click "Create". The new point will be stamped with the current date and time. Keep a log of this so you can find it easily should you need to use System Restore.
  • Then use Disk Cleanup to remove all but the most recently created Restore Point.
  • Go to Start > Run and type: Cleanmgr
  • Click "Ok". Disk Cleanup will scan your files for several minutes, then open.
  • Click the "More Options" tab, then click the "Clean up" button under System Restore.
  • Click Ok. You will be prompted with "Are you sure you want to delete all but the most recent restore point?"
  • Click Yes, then click Ok.
  • Click Yes again when prompted with "Are you sure you want to perform these actions?"
  • Disk Cleanup will remove the files and close automatically.
Vista Users can refer to these links: Create a New Restore Point and Disk Cleanup.

Tips to protect yourself against malware and reduce the potential for re-infection:Avoid gaming sites, pirated software, cracking tools, keygens, and peer-to-peer (P2P) file sharing programs. They are a security risk which can make your computer susceptible to a smörgåsbord of malware infections, remote attacks, exposure of personal information, and identity theft. Many malicious worms and Trojans spread across P2P file sharing networks, gaming and underground sites. Users visiting such pages may see innocuous-looking banner ads containing code which can trigger pop-up ads and malicious Flash ads that install viruses, Trojans and spyware. Ads are a target for hackers because they offer a stealthy way to distribute malware to a wide range of Internet users. The best way to reduce the risk of infection is to avoid these types of web sites and not use any P2P applications. Read P2P Software User Advisories and Risks of File-Sharing Technology.

Keeping Autorun enabled on USB and other removable drives has become a significant security risk due to the increasing number of malware variants that can infect them and transfer the infection to your computer. To learn more about this risk, please read:
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