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Mobile phone trojans

Published: 2009-07-01,
Last Updated: 2009-07-01 13:16:40 UTC
by Bojan Zdrnja (Version: 2)

Couple of days ago one of our readers, Frank Wolff, sent a screenshot of an unsolicited message he received through ICQ. The message was full of garbled characters but included a link to a .JAR (Java ARchive).

The JAR file contained a malicious MIDlet, which is a Java program using the application framework for MIDP (Mobile Information Device Profile). This framework is normally used on mobile phones supporting Java (almost all phones today support Java).

As JAR files are actually just ZIP archives, it's trivial to unpack them. After unpacking a JAR archive, besides class files, the most important information is in the MANIFEST.MF file, in the META-INF directory. This file defines which class gets executed first and some other information. Below is the content of the extracted MANIFEST.MF file:

More: http://isc.sans.org/?utm_source=web-sans&utm_medium=text-ad&utm_content=Featured_Links_Homepage_ISC_feat_links_homepage&utm_campaign=ISC

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