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Removal instructions for MyDisk

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Content is republished with permission from Malwarebytes.

What is MyDisk?

The Malwarebytes research team has determined that MyDisk is a fake anti-malware application. These so-called "rogues" use intentional false positives to convince users that their systems have been compromised. Then they try to sell you their software, claiming it will remove these threats. In extreme cases the false threats are actually the very trojans that advertise or even directly install the rogue. You are strongly advised to follow our removal instructions below.

How do I know if I am infected with MyDisk?

This is how the main screen of the rogue application looks:

Posted Image

You will find these icons on your desktop and in your taskbar:

Posted Image

And see these warnings:

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How did MyDisk get on my computer?

Rogue programs use different methods for spreading themselves. This particular one was installed by a trojan.

How do I remove MyDisk?

Our program Malwarebytes' Anti-Malware can detect and remove this rogue application.
  • Please download Malwarebytes' Anti-Malware to your desktop.
  • Double-click mbam-setup.exe and follow the prompts to install the program.
  • At the end, be sure a check-mark is placed next to the following:

    • Update Malwarebytes' Anti-Malware
    • Launch Malwarebytes' Anti-Malware
  • Then click Finish.
  • If an update is found, it will download and install the latest version.
  • Once the program has loaded, select Perform quick scan, then click Scan.
  • When the scan is complete, click OK, then Show Results to view the results.
  • Be sure that everything is checked, and click Remove Selected. Reboot your computer if prompted.
  • When completed, a log will open in Notepad. The rogue application should now be gone.

Is there anything else I need to do to get rid of MyDisk?

  • The shortcut called My Disk on the desktop can be deleted if it belonged to the rogue. In case of doubt check the icon earlier in this post.

How would the full version of Malwarebytes' Anti-Malware help protect me?

We hope our application has helped you eradicate this malicious software. If your current security solution let this infection through, you might please consider purchasing the FULL version of Malwarebytes' Anti-Malware for additional protection.

As you can see below the full version of Malwarebytes' Anti-Malware would have protected you against the MyDisk rogue. It would have warned you before the rogue could install itself, giving you a chance to stop it before it became too late.

Posted Image

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Technical details for experts

Signs in a HijackThis log:

O4 - HKCU\..\Run: [jCc670r5stByF4m] C:\DOCUME~1\ALLUSE~1\APPLIC~1\jCc670r5stByF4m.exe

Note: the name of the file and the registry-value are random

Alterations made by the installer:

  File System
    In the existing folder C:\Documents and Settings\All Users\Application Data
      Adds the file ~jCc670r5stByF4m"="16:45 08/01/11 280 bytes
      Adds the file ~jCc670r5stByF4mr"="16:45 08/01/11 168 bytes
      Adds the file jCc670r5stByF4m"="16:45 08/01/11 344 bytes
      Adds the file jCc670r5stByF4m.exe"="21:37 07/01/11 388096 bytes
    In the existing folder C:\Documents and Settings\{username}\Desktop
      Adds the file My Disk.lnk"="16:45 08/01/11 830 bytes
    Adds the folder C:\Documents and Settings\{username}\Start Menu\Programs\My Disk
      Adds the file Uninstall My Disk.lnk"="16:45 08/01/11 914 bytes
      Adds the file My Disk.lnk"="16:45 08/01/11 842 bytes


Malwarebytes' Anti-Malware log:
Malwarebytes' Anti-Malware

Database version: 5487

Windows 5.1.2600 Service Pack 3
Internet Explorer 6.0.2900.5512

1/9/2011 1:28:33 PM
mbam-log-2011-01-09 (13-28-33).txt

Scan type: Quick scan
Objects scanned: 120913
Time elapsed: 2 minute(s), 12 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 1
Folders Infected: 0
Files Infected: 1

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
(No malicious items detected)

Registry Values Infected:
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\c0KRbDrMc (Rogue.FakeHDD) -> Value: c0KRbDrMc -> Quarantined and deleted successfully.

Folders Infected:
(No malicious items detected)

Files Infected:
c:\Documents and Settings\All Users\Application Data\c0krbdrmc.exe (Rogue.FakeHDD) -> Delete on reboot.

As mentioned before the full version of Malwarebytes' Anti-Malware could have protected your computer against this threat.
We use different ways of protecting your computer(s):
  • Dynamically Blocks Malware Sites & Servers
  • Malware Execution Prevention
Save yourself the hassle and get protected.
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