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You have been re-routed to the Ransom:Win32/Genasom.DK write up because Trojan%3aWin32%2fRansom.DK has been renamed to Ransom:Win32/Genasom.DK
 

Ransom:Win32/Genasom.DK


Microsoft security software detects and removes this threat.

This threat stops you from loading Windows and displays a full-screen message, commonly called a "lock screen". If this threat asks you to pay a fee or fine, do not pay it. The message is a fraud.

It tries to scare you into paying a fine to unlock your PC.

You can read more on our ransomware page.



What to do now

Microsoft doesn’t recommend you pay the fine. There is no guarantee that paying the ransom will give you access to your files.

If you've already paid, see our ransomware page for help on what to do now.

Run antivirus or antimalware software

The following free Microsoft software detects and removes this threat:

Even if we've already detected and removed this particular threat, running a full scan might find other malware that is hiding on your PC.

Advanced troubleshooting

To restore your PC, you might need to download and run Windows Defender Offline. See our advanced troubleshooting page for more help.

You can also ask for help from other PC users at the Microsoft virus and malware community.

If you’re using Windows XP, see our Windows XP end of support page.

Threat behavior

This threat blocks access to the Windows desktop and displays a message asking the user to send money to a mobile phone account.

Installation

It creates the following registry entry so that it automatically executes at the next Windows start:

In subkey: HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
Sets value: "Shell"
With data: "Explorer.exe "%USERPROFILE%\...\<malware file name>.exe""

Payload

Prevents desktop access
The threat displays the following message:

A rough translation of this text is as follows:

"Windows is locked. Microsoft Security has detected misuse of the Internet. Cause: You've watched videos containing certain adult content. To unlock Windows you should transfer <amount> roubles to mobile phone account <mobile number>. Please find the unlock code on the billing machine slip. Note: If not paid within 12 hours, all data including Windows and Bios will be destroyed."

The user is then prevented from accessing the computer desktop.

Analysis by Sergey Chernyshev


Symptoms

System changes

The following system changes may indicate the presence of this malware:

  • The display of the following image:


Prevention


Alert level: Severe
First detected by definition: 1.105.313.0
Latest detected by definition: 1.177.99.0 and higher
First detected on: May 23, 2011
This entry was first published on: May 23, 2011
This entry was updated on: Jun 13, 2014

This threat is also detected as:
  • Trojan.Fakealert.22376 (Dr.Web)
  • Trojan-Ransom.Win32.Gimemo.bdj (Kaspersky)
  • Trojan.FakeAV!gen32 (Symantec)
  • TROJ_RANSOM.WNL (Trend Micro)