2 replies to this topic

[Metallica]

Content is republished with permission from Malwarebytes.

What is WindowsDisk?

The Malwarebytes research team has determined that WindowsDisk 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 WindowsDisk?

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



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



And see this type of warnings:



How did WindowsDisk get on my computer?

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

How do I remove WindowsDisk?

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 WindowsDisk?

• No, Malwarebytes' Anti-Malware removes WindowsDisk completely.

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 WindowsDisk rogue. It would have warned you before the rogue could install itself, giving you a chance to stop it before it became too late.

Technical details for experts

Signs in a HijackThis log:

C:\Documents and Settings\All Users\Application Data\yCqyhXgQRtPORaf.exe
C:\Documents and Settings\All Users\Application Data\OjfpfCwVgES.exe

O4 - HKCU\..\Run: [yCqyhXgQRtPORaf.exe] C:\Documents and Settings\All Users\Application Data\yCqyhXgQRtPORaf.exe
O4 - HKCU\..\Run: [OjfpfCwVgES] C:\Documents and Settings\All Users\Application Data\OjfpfCwVgES.exe

Note: the filenames are random

Alterations made by the installer:

  File System
  ===============
    In the existing folder C:\Documents and Settings\All Users\Application Data
      Adds the file ~OjfpfCwVgES"="11:09 29/01/11 272 bytes
      Adds the file ~OjfpfCwVgESr"="11:09 29/01/11 152 bytes
      Adds the file OjfpfCwVgES"="11:09 29/01/11 344 bytes
      Adds the file OjfpfCwVgES.exe"="11:07 29/01/11 385536 bytes
      Adds the file syXDXPtvtYypMgd.dll"="11:07 29/01/11 435200 bytes
      Adds the file yCqyhXgQRtPORaf.exe"="15:16 27/01/11 475136 bytes
    In the existing folder C:\Documents and Settings\{username}\Desktop
      Adds the file Windows Disk.lnk"="11:09 29/01/11 820 bytes
    Adds the folder C:\Documents and Settings\{username}\Start Menu\Programs\Windows Disk
      Adds the file Windows Disk.lnk"="11:09 29/01/11 832 bytes
      Adds the file Uninstall Windows Disk.lnk"="11:09 29/01/11 904 bytes

  Registry
  ===============
    [HKEY_CLASSES_ROOT\CLSID\{FBF23B40-E3F0-101B-8488-00AA003E56F8}\PersistentHandler]
      "(Default)"="'{5e941d80-bf96-11cd-b579-08002b30bfeb}'"
    [HKEY_CLASSES_ROOT\ftp\DefaultIcon]
      "(Default)"="'%SystemRoot%\system32\url.dll,0'"
    [HKEY_CLASSES_ROOT\ftp\shell]
      "(Default)"="'open'"
    [HKEY_CLASSES_ROOT\htmlfile]
      "BrowserFlags"="8"
      "EditFlags"="65536"
    [HKEY_CLASSES_ROOT\HTTP\shell]
      "(Default)"="'open'"
    [HKEY_CLASSES_ROOT\https]
      "BrowserFlags"="8"
    [HKEY_CLASSES_ROOT\https\shell]
      "(Default)"="'open'"
    [HKEY_CURRENT_USER\Software]
      "12B79064-EB17-4f82-9DFE-B975BD26D1DC"=""
    [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Associations]
      "LowRiskFileTypes"="'/{hq:/s`s:/ogn:/uyu:/dyd:/c`u:/bnl:/ble:/sdf:/lrh:/iul:/iulm:/fhg:/clq:/kqf:/`
wh:/lqf:/lqdf:/lnw:/lq2:/l2t:/v`w:/rbs:'
    [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run]
      "OjfpfCwVgES"="'C:\Documents and Settings\All Users\Application Data\OjfpfCwVgES.exe'"
      "yCqyhXgQRtPORaf.exe"="'C:\Documents and Settings\All Users\Application Data\yCqyhXgQRtPORaf.exe'"

Malwarebytes' Anti-Malware log:

Malwarebytes' Anti-Malware 1.50.1.1100
www.malwarebytes.org

Database version: 5633

Windows 5.1.2600 Service Pack 3
Internet Explorer 6.0.2900.5512

1/29/2011 11:15:07 AM
mbam-log-2011-01-29 (11-15-07).txt

Scan type: Quick scan
Objects scanned: 123183
Time elapsed: 1 minute(s), 41 second(s)

Memory Processes Infected: 2
Memory Modules Infected: 1
Registry Keys Infected: 0
Registry Values Infected: 2
Folders Infected: 0
Files Infected: 5

Memory Processes Infected:
c:\documents and settings\all users\application data\ycqyhxgqrtporaf.exe (Trojan.Agent) -> 580 -> Unloaded process successfully.
c:\documents and settings\all users\application data\ojfpfcwvges.exe (Trojan.Agent.Gen) -> 468 -> Unloaded process successfully.

Memory Modules Infected:
c:\documents and settings\all users\application data\syxdxptvtyypmgd.dll (Trojan.Agent) -> Delete on reboot.

Registry Keys Infected:
(No malicious items detected)

Registry Values Infected:
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yCqyhXgQRtPORaf.exe (Trojan.Agent) -> Value: yCqyhXgQRtPORaf.exe -> Quarantined and deleted successfully.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\OjfpfCwVgES (Trojan.Agent.Gen) -> Value: OjfpfCwVgES -> Quarantined and deleted successfully.

Folders Infected:
(No malicious items detected)

Files Infected:
c:\documents and settings\all users\application data\syxdxptvtyypmgd.dll (Trojan.Agent) -> Delete on reboot.
c:\documents and settings\all users\application data\ycqyhxgqrtporaf.exe (Trojan.Agent) -> Delete on reboot.
c:\documents and settings\all users\application data\ojfpfcwvges.exe (Trojan.Agent.Gen) -> Delete on reboot.
c:\documents and settings\{username}\local settings\Temp\1453E8.tmp (Rootkit.Agent) -> Delete on reboot.
c:\documents and settings\{username}\local settings\Temp\tmp1.tmp (Trojan.Agent) -> Quarantined and deleted successfully.

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.

[jbolen]

I have this windowsdisk malware on my PC and have ran the Malwarebytes. I made sure that the most recent update was downloaded and did both the quick scan and the full scan. I did find three infected files and took care of them. The problem is as soon as I reset the computer wndowsdisk was still there. Now when I run Malwarebytes it finds no problems. Any suggestions.

[Metallica]

Hi jbolen,

Please start a new topic here. Include a description of your problem, including the fact that you already tried MBAM. There are probably other factors involved, and one of our malware experts will be able to help you with this issue.