Thanks to TheXDarksider for finding the sample for me for the video.
Man, 5,000 subscribers already? You guys are so awesome. I never expected the first one.
The Heap41A worm spreads by dropping itself and an autorun.inf file to all USB devices that are attached to the system. This will ensure that it is executed whenever the device is plugged into another computer. It then goes about blocking Mozilla, YouTube and Orkut, all the while laughing at you.
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Heap41A is a harmful (depending on how you look at it) worm that prevents execution of Firefox...