The Webzine "The H Security" recently published a detailed article explaining how malware and viruses are embedded within a backward written executable file which executes within Intel based Linux, Windows and OS X systems! I suspect that this executable cannot be run within PowerPC systems for the same reasons that PowerPC systems cannot run Intel based executables natively without emulation programs. In other words, if a PowerPC user shuts down or quits the emulation program allowing one to run Windows or other Intel based programs then that individual or institution cannot be infected by this strategy.
Here's the story!!!