Belgian virus writer (female) who has once written a virus in Tcl. But who is now in the spotlight because of a C# virus.
Her homepage from where you could download the virus seems to be down but it still shows up in the google cache.

From the site: [http://66.102.11.104/search?q=cache:tyeHyulKbNcJ:coderz.net/gigabyte/+gigabyte+virus+tcl&hl=nl&ie=UTF-8] - 
November 10, 2003: I wanted to learn a scripting language I could use in Linux, and decided to learn Tcl. So how did I start learning? That's right, I wrote a virus in it. Was quite simple tho, seeing as it's a scripting language. Its name is Darkness, and you can download it here.