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Trojan horse Downloader.Generic_c.AKX/ Moved


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#1 black069

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Posted 04 April 2009 - 06:11 PM

Hello.

I just returned from a week-long trip last night, and my wife commented that our computer had been running slowly.

I checked the history of AVG Free v8.5. I have the program configured to update and run daily.

The "Resident Shield detection" under the "History" tab shows an infection found 3/31/09, which it had automatically moved to the Virus Vault:

Infection: Trojan horse Downloader.Generic_c.AKX

Object: C:\Documents and Settings\gb\Local Settings\Temporary Internet Files\Content.IE5\VCND6BXB\63[1].pdf

Process: C:\Program Files\Internet Explorer\iexplore.exe


So this bug is sitting in AVG's Virus Vault.

I ran a complete scan of my hard drive using AVG, which only found tracking cookies.

I then ran a complete scan using Malwarebytes' Anti-Malware, which was clean.

My computer appears to be OK (after I ran CCleaner).

I googled "Trojan horse Downloader.Generic_c.AKX". It appears that some other folks have been infected within the last 2-3 weeks, but there are no answers as to what it is and what to do with it (besides starting from scratch, which I find a little excessive).

Should I just DELETE it from the AVG Vault, or is there some special malware removal technique I need to use with this particular infection? Please note (see above) that the bug was found in the Temporary Internet Files folder and that it is/was in the form of a .pdf file.

Thanks in advance for any help. Please see my profile for my laptop's specs (which is up-to-date except that I updated to the Release Candidate version of IE-8 maybe 2 weeks ago, just a day or two before the final version was released. Anyway, my profile may still say IE-7 until I update it.)

I would appreciate anyone's help to solve this matter.

Thanks.




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#2 Orange Blossom

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Posted 04 April 2009 - 07:06 PM

As no logs have been posted, I am shifting this topic from the specialized HiJack This forum to the Am I Infected forum.

PLEASE DO NOT NOW POST LOGS unless a log is specifically requested.
Help us help you. If HelpBot replies, you MUST follow step 1 in its reply so we know you need help.

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#3 boopme

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Posted 04 April 2009 - 11:11 PM

You can just delete ,Thats' safe to do . Are there any other symptoms of infection now?
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#4 black069

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Posted 05 April 2009 - 02:51 AM

You can just delete ,Thats' safe to do . Are there any other symptoms of infection now?


Thanks, boopme, for the instructions. I deleted the infection from the AVG Virus Vault.

As for any other symptoms, everything appears to be running smoothly. However, while awaiting a response to my original post, I ran SUPERAntiSpyware (Free Edition)'s most recently updated virus definition database version and found the following (which I quarantined immediately):

Trace.Known Threat Sources
C:\Documents and Settings\gb\Local Settings\Temporary Internet Files\Content.IE5\YK72FHL9\virusremover2009[1].jpg

After receiving your post, I removed/deleted this entry from SAS's quarantine. Was this the correct thing to do?

I have not run any additional antivirus scans since.

A couple of other questions related to malware removal for which I need clarification:

1. When an infected file is found by an antimalware program, should I reboot and, if so, when should I do so (ie after moving the bug to quarantine, after deleting the bug from the quarantine folder, both, or neither, etc.)? And in this scenario, if rebooting is required, should I reboot into safe mode and, if so, under what circumstances should I do so?

2. While configuring certain antimalware programs (SUPERAntiSpyware, for example), it offers a choice of whether or not to scan the System Restore points. (In SAS, it is worded, "Ignore System Restore/Volume Information on ME/XP".) I have come across different opinions regarding whether or not to include these in the scan. The reason why I ask this question (and the one below) is that over the last 2-3 months, I have found infections in the C:\System Volume Information folder; in such cases, I deleted the specific infected file(s) via the antimalware application. In such instances, does this mean that all of the other System Restore points are infected as well, thus requiring me to delete all files in the C:\System Volume Information folder (by turning off System Restore, rebooting, then turning back on System Restore)? Or is deleting only the infected System Restore file(s) detected by the antimalware program sufficient enough, such that the other System Restore points are okay? Of course, if I check the box to "ignore System Restore/Volume Information, then this is a moot point, right? (Some out in the blogosphere advocate ignoring these files b/c it will make the scan faster and also because of their argument that it is better to have infected System Restore points than no System Restore points at all.)

If I need to ask these questions as separate topics, please let me know, and I will do so.

Thanks for your help!



#5 DaChew

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Posted 05 April 2009 - 05:50 AM

1. When an infected file is found by an antimalware program, should I reboot and, if so, when should I do so (ie after moving the bug to quarantine, after deleting the bug from the quarantine folder, both, or neither, etc.)? And in this scenario, if rebooting is required, should I reboot into safe mode and, if so, under what circumstances should I do so?


Reboot to normal mode if required for removal(delete on reboot)

For question number 2, it's best to scan the restore points as the log will give clues on the infection, it's rather complicated to explain tho.

After being reasonable sure you have removed the infection it's best to purge system restore

Now 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 backed up, renamed and 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.
Chewy

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#6 black069

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Posted 17 April 2009 - 11:26 PM

DaChew (in the post preceding this), gave an excellent response to my question. I would encourage anyone having similar problems to refer to his post for guidance. It helped me with my problem and gave me further insight into the function of System Restore.

As the topic starter, I personally would consider this post closed. If a moderator reads this, please mark as closed or please give me instructions regarding how to proceed when the topic is answered to the satisfaction of its starter (e.g., is there an icon to insert noting to a moderator that the question has been answered or some type of other "signal"?)

Thanks for everyone's help. :thumbsup:

black069 (the chubby pink bouncing somnambulator)






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