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Win32:mydoom_m[wm]


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2 replies to this topic

#1 Filip Severs

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Posted 14 January 2008 - 08:41 AM

Dear all,

Avast has detected above mentionned virus. But it cannot delete it and everytime I scan it is always there. Has someone an idea on how to get rid of it.
Thanks

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#2 VirtueOfPanda

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Posted 14 January 2008 - 09:20 AM

Hi Filip Severs,

Do you know the path of the infected file? When did avast! alert you to the file (e.g was it after an update, after you downloaded a file, etc...)?

First check if it is a false positive at VirusTotal ( http://www.virustotal.com ). See how many scanners detect it.

If a majority of the scanners detect it, try and do a boot-time scan with avast!... Here is a website which tells you how : http://www.digitalred.com/avast-boot-time.php

Have it run and hopefully it'll get rid of it... Bear in mind the scan will take some time, unless you specify the folder/file you need to scan (e.g. in Step 5 on that website instead of choosing "Scan all local disks" choose "Scan selected path and browse to the folder which has the infected file in...).

If it is a false positive then add it to the Exclusions List:

1. Right click on the avast! icon in the system tray and select On-Access Protection Control
2. Open the Standard Shield screen and click on the Customize button on the right you may need to click on Details...>> to see this
3. Click on the Advanced tab then Add and enter the path of the file in.

Good luck,

~VirtueOfPanda~
Give a man a fish and you feed him for a day. Teach a man to fish and you feed him for a lifetime.

#3 quietman7

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Posted 14 January 2008 - 02:12 PM

Win32/Mydoom is a family of mass-mailing worms that spread through e-mail and peer-to-peer networks.

Download and perform a full scan with MS Malicious Software Removal Tool in "Safe Mode".
click on the link "Skip the details and download the tool"

If that does not help, then do this:

Please download ATF Cleaner by Atribune & save it to your desktop. DO NOT use yet.
Please download Sysclean Package & save it to your desktop.
  • Create a new folder on drive "C:\" and rename it Sysclean - (C:\Sysclean).
  • Place the sysclean.com inside that folder.
  • Then download the latest Virus Pattern Files - (Pattern files are usually named lptxxx.zip, where xxx is the pattern file number)
  • Extract (unzip) the lptxxx.zip pattern file into the Sysclean folder where you put sysclean.com. (Click here for information on how to extract a file if your not sure how to do this. DO NOT 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".

Double-click ATF-Cleaner.exe to run the program.
  • Under Main "Select Files to Delete" choose: Select All.
  • Click the Empty Selected button.
  • If you use Firefox browser click Firefox at the top and choose: Select All
  • Click the Empty Selected button.
    If you would like to keep your saved passwords, please click No at the prompt.
  • If you use Opera browser click Opera at the top and choose: Select All
  • Click the Empty Selected button.
    If you would like to keep your saved passwords, please click No at the prompt.
  • Click Exit on the Main menu to close the program.
Note: On Vista, "Windows Temp" is disabled. To empty "Windows Temp" ATF-Cleaner must be "Run as an Administrator".

Scan with Sysclean as follows:
  • Open the Sysclean folder and double-click on sysclean.com to start the scanning process.
  • Put a check mark on the "Automatically clean or delete infected files" option by clicking in the checkbox.
  • Click the Advanced >> button.
  • The scan options appear. Select the "Scan all local fixed drives".
  • Click the "Scan button" on the Trend Micro System Cleaner console.
  • It will take some time to complete. Be patient and let it clean whatever it finds.
  • Another MS-DOS window appears containing the log file (sysclean.log) generated in the same folder where the scan is completed - C:\Sysclean.
  • To view the log, click the "View button" on the Trend Micro System Cleaner console. The Trend Micro Sysclean Package - Log window appears.
    • The Files Detected section shows the viruses that were detected by System Cleaner.
    • The Files Clean section shows the viruses that were cleaned.
    • The Clean Fail section shows the viruses that were not cleaned.
  • Exit when done, reboot normally and re-enable your anti-virus program.
Instructions with screenshots are here if you need them.

When using Sysclean its best to use the Administrator's account or an account with Administrative rights otherwise you will not have access rights to scan some locations. You can also Use the "Run As" Command to Start a Program as an Administrator. Even when doing that, the scanning process may result in "Access Denied" messages for some files. This is normal because these files are protected by the system.
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