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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Ransom.K

Threat LevelLow threatDamageHighDistributionNot widespread
Common name:Ransom.K
Technical name:Trj/Ransom.K
Threat level:Medium
Type:Trojan
Effects:  

It is designed to blackmail users, by encrypting the documents it finds in the computer and by asking $100 for some decryption software. It does not spread automatically using its own means.

Affected platforms:

Windows 2003/XP/2000/NT/ME/98/95

First detected on:Oct. 21, 2009
Detection updated on:Nov. 2, 2009
StatisticsNo
Proactive protection:
Yes, using TruPrevent Technologies

Brief Description 

    

Ransom.K is a Trojan designed to blackmail users, by encrypting the documents it finds in the computer and by asking $100 for some decryption software. The affected extensions are DB (Access), DOC (Word documents), JPG (pictures), TXT (text files) and XLS (Excel documents). Users will not be able to access any of these files.

However, due to some errors in the configuration of the Trojan, there is an easy solution to recover the documents. You can consult it in the section "How can the files be removed?" in Effects.

Ransom.K does not spread automatically using its own means. It needs an attacking user's intervention in order to reach the affected computer.

Visible Symptoms 

    

Ransom.K is easy to recognize, as it shows the following symptoms:

  • It reaches the computer in a file which has the following icon, passing itself off as a help file:

  • When the file is run, a wallpaper is displayed on screen, informing users that their files have been encrypted and in order to recover them, they have to send an email and pay $100, so that they can receive some decryption software: