The hacker accused of running the Mariposa botnet is currently on trial in Slovenia.

"Slovenian Matjaz Skorjanc, who is believed to go by the name of Iserdo on the Internet, appeared in court accused of creating the software used to run Mariposa and selling it to others for as much as $1,300, according to reports," writes TechWeekEurope's Tom Brewster.

"Skorjanc's former girlfriend, Nusa Coh, is also standing trial -- accused of being an accomplice in alleged money laundering," writes Sophos' Graham Cluley.

"Mariposa style botnets were built using Skorjanc's 'Butterfly Bot' code, according to the Slovenian authorities, and it was sold to cyber criminals worldwide," writes The Inquirer's Dave Neal. "Mariposa, the Spanish version of the botnet, was the largest and the most notorious. Skorjanc is also accused of tailoring his software to customer requests and selling plugins to boost its features."

"At its height, the Mariposa botnet infected up to 12.7 million PCs, with more than half of the Fortune 1,000 companies believed to have been compromised, including 40 major banks," writes V3.co.uk's Gareth Morgan. "One group of Mariposa botnet herders were arrested in Spain in March 2010. However the three men picked up by the Spanish authorities were believed to have bought the code from another group, as none of them possessed the programming skills necessary to develop the malware."