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Cardown.B

Classification

Category:

Malware

Aliases:

  • Cardown.B
  • Java/Cardown.B
  • Trojan.Java.Shiwow

Summary

Cardown.B is a Java applet based trojan that downloads and installs Startpage.Y trojan on the system.

Cardown activates when user views a web page or HTML email that contains reference to the trojan file.

Cardown does not replicate and does not infect the host system, the only operations it does is to modify Interner Explorer start page and download and install Startpage.Y trojan component.

Removal

Technical Details

The Cardown.B is activated when a web site containing the trojan is loaded with unpacthed Microsoft Internet Explorer browser. When the JAR file containing the trojan is executed it uses Microsoft Internet Explorer VerifierBug vulnerability to get full privileges by escaping the Java security, and execute its code.

When executed the trojan modifies the Internet Explorer start page to point to the site where the trojan is downloaded from.

In addition to changing the Internet Explorer settings the trojan downloads trojan downloader win32.StartPage.Y and executes it.

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