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Virus On Flash Disk


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7 replies to this topic

#1 haken_zell

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Posted 15 August 2008 - 11:16 PM

a Virus on flash disk that keeps on coming back.,i detected and deleted the virus many times but it keeps on coming back, even if i reformat the flash disk it's still wont go away..i think the flash disk got its own recycler and i dont know how to delete it..thanks :thumbsup:

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#2 quietman7

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Posted 16 August 2008 - 07:54 AM

Please download Flash_Disinfector.exe by sUBs and save it to your desktop.
  • Double-click Flash_Disinfector.exe to run it and follow any prompts that may appear.
  • The utility may ask you to insert your flash drive and/or other removable drives. Please do so and allow the utility to clean up those drives as well. Hold down the Shift key when inserting the drive until Windows detects it to keep autorun.inf from executing if it is present.
  • Wait until it has finished scanning and then exit the program.
  • Reboot your computer when done.
Note: Flash_Disinfector will create a hidden folder named autorun.inf in each partition and every USB drive that is plugged in when you ran it. Don't delete this folder...it will help protect your drives from future infection.

Then download and scan your flash drive with "ClamWin Portable Antivirus".


Formatting a Flash Drive
How to Fix Errors and Format USB Flash Drives
Format a USB Drive (scroll down)

Note: If you are having trouble formatting your usb drive, hold down the Shift key when inserting the drive into your computer until Windows detects it. This should keep autorun.inf from executing automatically which may interfere especially if its related to a malware infection. Normally the autorun.inf commands are harmless but when this file has been modified (infected) it can cause problems. Flash drive infections usually involve malware that loads an autorun.inf file into the root folder of all drives (internal, external, removable). When the removable media is inserted, autorun looks for autorun.inf and automatically executes another malicious file to run on your computer. When a flash drive becomes infected, the Trojan will infect a system when the removable media is inserted if autorun has not been disabled.
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#3 haken_zell

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Posted 18 August 2008 - 08:58 PM

thank you so much.. :thumbsup:

but i cant download updates on ClamWin Portable Antivirus,it says error in connection but i have internet connection.. and i cant scan any drives..
can you please tell me how to..thanks again

#4 quietman7

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Posted 18 August 2008 - 09:25 PM

Try this instead.

Please download Dr.Web CureIt and save it to your desktop. DO NOT perform a scan yet.

Reboot your computer in "Safe Mode" using the F8 method. To do this, restart your computer and after hearing your computer beep once during startup (but before the Windows icon appears) press the F8 key repeatedly. A menu will appear with several options. Use the arrow keys to navigate and select the option to run Windows in "Safe Mode".

Scan with Dr.Web CureIt as follows:
  • Double-click on launch.exe to start the program.
  • Cancel any prompts to download the latest CureIt version and click Start.
  • At the prompt to "Start scan now", click Ok. Allow the setup.exe/driver to load if asked by any of your security programs.
  • The Express scan will automatically begin.
    (This is a short scan of files currently running in memory, boot sectors, and targeted folders).
  • If an infected object is found, you will be prompted to move anything that cannot be cured. Click Yes to All.
  • When complete, click Select All, then choose Cure > Move incurable.
    (This will move any detected files to the C:\Documents and Settings\userprofile\DoctorWeb\Quarantine folder if they can't be cured)
  • Now put a check next to Complete scan to scan all local disks and removable media. Note: If you only want to scan your usb (flash) drive, then instead put a check next to Custom Scan and click on (highlight) the drive letter associated with it.
  • In the top menu, click Settings > Change settings, and UNcheck "Heuristic analysis" under the "Scanning" tab, then click Ok.
  • Back at the main window, click the green arrow "Start Scanning" button on the right under the Dr.Web logo.
  • When the scan is complete, a message will be displayed at the bottom indicating if any viruses were found.
  • Click "Yes to all" if asked to cure or move the file(s) and select "Move incurable".
  • In the top menu, click file and choose save report list.
  • Save the DrWeb.csv report to your desktop.
  • Exit Dr.Web Cureit when done.
  • Important! Reboot your computer because it could be possible that files in use will be moved/deleted during reboot.
  • After reboot, post the contents of the log from Dr.Web in your next reply. (You can use Notepad to open the DrWeb.cvs report)

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#5 haken_zell

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Posted 26 August 2008 - 11:44 PM

im sorry i did not reply on this topic, because i misplaced my flash disk :thumbsup: and i have no idea where i can find it right now.. :flowers:

i wanna thank you quietman7 for your help, thank you very much..

#6 quietman7

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Posted 27 August 2008 - 06:50 AM

You're welcome.

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. Read Danger USB! Worm targets removable memory sticks.

You can hold down the Shift key when inserting the drive into your computer until Windows detects it to keep autorun.inf from executing automatically. However, I recommend disabling the Autorun feature on USB and removable drives as a method of prevention. This should keep the malicious file from automatically running upon insertion and infecting your system while allowing you to safely perform a scan.

The easiest way to disable Autorun on a specific drive is to download and use Tweak UI PowerToy.
  • After installation, launch Tweak UI, double-click on My Computer in the tree menu on the left, then click on AutoPlay > Drives. This will allow you to change the system settings for AutoPlay/autorun.
  • Uncheck the drives you want to disable AutoPlay on and click on Apply.
  • Next, click on the Types in the left tree. This allows you to control whether Autoplay is enabled for CD and DVD drives and removable drives. You may need to restart Tweak UI if it closes after step 2.
  • Uncheck the box to disable Autoplay for a particular type of drive.
  • Click Apply.
If needed, see Disable Autorun/AutoPlay in XP with Tweak UI" for instructions with screenshots.

Note: When Autorun is disabled, double-clicking a drive which has autorun.inf in its root directory may still activate Autorun so be careful. Disabling autorun/autoplay does not prevent you from accessing those media sources. They are still available by opening My Computer and accessing the source drive (cd, dvd, usb/flash drive or external hard drive).

If your using Windows Vista, please refer to "Preventing AutoPlay with Local Group Policy Editor or AutoPlay options panel". Windows 2000 users can refer to "Disabling Autoplay in Windows 2000 with Group Policy".


For Tips to protect yourself against malware and reduce the potential for re-infection, be sure to read:
• "Simple and easy ways to keep your computer safe".
• "How did I get infected?, With steps so it does not happen again!".
• "Best Practices - Internet Safety for 2008".
• "Hardening Windows Security - Part 1 & Part 2".
• "IE Recommended Minimal Security Settings" - "How to Secure Your Web Browser".

• Avoid gaming sites, underground web pages, pirated software sites, 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 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.
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#7 haken_zell

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Posted 29 August 2008 - 01:58 PM

wow, i have learned a lot on this topic..

thank you so much and more power!!.. :thumbsup:

#8 quietman7

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Posted 29 August 2008 - 02:01 PM

You're welcome.

Safe surfing and have a malware free day. :thumbsup:
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