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#1: Virus, what's safe to delete... Author: JG300-Ascout, Location: Cyberspace

Posted: Sun Nov 08, 2009 3:27 am
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Trend reports that I acquired "Cryp_Krap-4" (and three other CrypKraps that it reported ). This one, it says it can't fix like the others, which it deleted successfully). It's apparently located in:

C:Users/Owner/AppData/Local/Temp

I cannot locate the offender by name. Is stuff in this location safe to delete as a group (like, all of it)? It included a number of empty folders and various folders related to some downloaded FS aircraft and stuff like that.

How can I get rid of this booger and is anything in the Temp folder above necessary to function? Trend Micro window keeps coming up with warning advising a scan, which I did, but as it can't fix this one, can't make admonition to scan system go away.

HALP!

#2: Re: Virus, what's safe to delete... Author: Shadow_Bshwackr, Location: Central Illinois, USA

Posted: Sun Nov 08, 2009 3:30 am
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See if your AV has a "Scan before boot" option or something similar. The reason it can't delete is it's running at the same time Windows is and the file's locked. There are other methods if it doesn't however...:)

#3: Re: Virus, what's safe to delete... Author: JG300-Ascout, Location: Cyberspace

Posted: Sun Nov 08, 2009 3:53 am
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- Shadow_Bshwackr

See if your AV has a "Scan before boot" option or something similar. The reason it can't delete is it's running at the same time Windows is and the file's locked. There are other methods if it doesn't however...:)

Bushy
couldn't find such an option, using Trend Micro, which is what came on my &$^$# "V-word" OS.

Would there be anything that's a "must have" in that particular Temp folder?

#4: Re: Virus, what's safe to delete... Author: Shades, Location: 3rd Branch up, 'Ye Olde Oak', Green Wood.

Posted: Sun Nov 08, 2009 9:40 am
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It's an alias/variant of "Trojan/W32.Agent.174212" and it's main purpose seems to be stealing passwords.

Here's what Norton has to say about the parent form (sorry, I don't give two hoots for any other AV).

Discovered: April 15, 2009
Updated: April 15, 2009 4:22:57 PM
Also Known As: Trojan:W32/Agent.AF [F-Secure]
Type: Trojan
Infection Length: 109,568 bytes
Systems Affected: Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows Vista, Windows XP

Trojan.Ransomlock is a Trojan horse that locks the desktop making the computer unusable.

For more information, please read the following:
SMS Ransomware Threat
The Key(generator) to the SMS Ransomware ThreatProtectionInitial Rapid Release version April 15, 2009 revision 016
Latest Rapid Release version September 28, 2009 revision 007
Initial Daily Certified version April 15, 2009 revision 016
Latest Daily Certified version September 28, 2009 revision 022
Initial Weekly Certified release date April 15, 2009
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat AssessmentWildWild Level: Low
Number of Infections: 0 - 49
Number of Sites: 0 - 2
Geographical Distribution: Low
Threat Containment: Easy
Removal: Easy
DamageDamage Level: Low
Payload: Locks the desktop making the system unusable. Also displays a message with Russian text.
DistributionDistribution Level: Low

Removal using the Trojan.Ransomlock Key Generator Tool
Symantec Security Response has developed a removal tool to clean the infections of Trojan.Ransomlock. Use this removal tool first, as it is the easiest way to remove this threat.

Manual Removal:
The following instructions pertain to all current and recent Symantec antivirus products, including the Symantec AntiVirus and Norton AntiVirus product lines.

Disable System Restore (Windows Me/XP).
Update the virus definitions.
Run a full system scan.
Delete any values added to the registry.

For specific details on each of these steps, read the following instructions.

1. To disable System Restore (Windows Me/XP)
If you are running Windows Me or Windows XP, we recommend that you temporarily turn off System Restore. Windows Me/XP uses this feature, which is enabled by default, to restore the files on your computer in case they become damaged. If a virus, worm, or Trojan infects a computer, System Restore may back up the virus, worm, or Trojan on the computer.

Windows prevents outside programs, including antivirus programs, from modifying System Restore. Therefore, antivirus programs or tools cannot remove threats in the System Restore folder. As a result, System Restore has the potential of restoring an infected file on your computer, even after you have cleaned the infected files from all the other locations.

Also, a virus scan may detect a threat in the System Restore folder even though you have removed the threat.

For instructions on how to turn off System Restore, read your Windows documentation, or one of the following articles:

How to disable or enable Windows Me System Restore
How to turn off or turn on Windows XP System Restore

Note: When you are completely finished with the removal procedure and are satisfied that the threat has been removed, reenable System Restore by following the instructions in the aforementioned documents.

For additional information, and an alternative to disabling Windows Me System Restore, see the Microsoft Knowledge Base article: Antivirus Tools Cannot Clean Infected Files in the _Restore Folder (Article ID: Q263455).

2. To update the virus definitions
Symantec Security Response fully tests all the virus definitions for quality assurance before they are posted to our servers. There are two ways to obtain the most recent virus definitions:

Running LiveUpdate, which is the easiest way to obtain virus definitions.

If you use Norton AntiVirus 2006, Symantec AntiVirus Corporate Edition 10.0, or newer products, LiveUpdate definitions are updated daily. These products include newer technology.

If you use Norton AntiVirus 2005, Symantec AntiVirus Corporate Edition 9.0, or earlier products, LiveUpdate definitions are updated weekly. The exception is major outbreaks, when definitions are updated more often.

Downloading the definitions using the Intelligent Updater: The Intelligent Updater virus definitions are posted daily. You should download the definitions from the Symantec Security Response Web site and manually install them.

The latest Intelligent Updater virus definitions can be obtained here: Intelligent Updater virus definitions. For detailed instructions read the document: How to update virus definition files using the Intelligent Updater.

3. To run a full system scan

Start your Symantec antivirus program and make sure that it is configured to scan all the files.

For Norton AntiVirus consumer products: Read the document: How to configure Norton AntiVirus to scan all files.

For Symantec AntiVirus Enterprise products: Read the document: How to verify that a Symantec Corporate antivirus product is set to scan all files.

Run a full system scan.
If any files are detected, follow the instructions displayed by your antivirus program.
Important: If you are unable to start your Symantec antivirus product or the product reports that it cannot delete a detected file, you may need to stop the risk from running in order to remove it. To do this, run the scan in Safe mode. For instructions, read the document, How to start the computer in Safe Mode. Once you have restarted in Safe mode, run the scan again.
After the files are deleted, restart the computer in Normal mode and proceed with the next section.

Warning messages may be displayed when the computer is restarted, since the threat may not be fully removed at this point. You can ignore these messages and click OK. These messages will not appear when the computer is restarted after the removal instructions have been fully completed. The messages displayed may be similar to the following:

Title: [FILE PATH]
Message body: Windows cannot find [FILE NAME]. Make sure you typed the name correctly, and then try again. To search for a file, click the Start button, and then click Search.

4. To delete the value from the registry
Important: Symantec strongly recommends that you back up the registry before making any changes to it. Incorrect changes to the registry can result in permanent data loss or corrupted files. Modify the specified subkeys only. For instructions refer to the document: How to make a backup of the Windows registry.

Click Start > Run.
Type regedit
Click OK.

Note: If the registry editor fails to open the threat may have modified the registry to prevent access to the registry editor. Security Response has developed a tool to resolve this problem. Download and run this tool, and then continue with the removal.

Restore the following registry entries to their previous values, if required:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\"Userinit" = "%System%\userinit.exe, %Temp%\don[RANDOM CHARACTERS].tmp"

Exit the Registry Editor.

Note: If the risk creates or modifies registry subkeys or entries under HKEY_CURRENT_USER, it is possible that it created them for every user on the compromised computer. To ensure that all registry subkeys or entries are removed or restored, log on using each user account and check for any HKEY_CURRENT_USER items listed above.

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