Copyright © 2002, 2003 by Alexander Bartolich
|Revision If you don't care where you are, then you ain't lost.||2003-02-15|
|Systematic search for infection targets with scanner.|
This document describes how to write parasitic file viruses infecting ELF executables. Though it contains a lot of source code, no actual virus is included. Every mentioned infection method is accompanied with a practical guide to detection.
Viruses are not a threat to Linux! 
A quote from Rick's Rant on anti-virus software: 
The problem with answering this question is that those asking it know only OSes where viruses, trojan-horse programs, worms, nasty Java scripts, ActiveX controls with destructive payloads, and ordinary misbehaved applications are a constant threat to their computing. Therefore, they refuse to believe Linux could be different, no matter what they hear. And yet it is.
The first release of this document covered only Linux/i386. Among the platforms using ELF it is considered the most viable for virus spread.