A British man has been arrested by the FBI and Scotland Yard on charges of virus writing.
It is thought he may be responsible for writing the Windows-infecting Leave worm, which failed to make an impact earlier this summer.
The 24-year-old, who has not been named by police, was detained in the UK at the end of July and will face trial later this year. If found guilty, he faces five years in jail under guidelines of the Computer Misuse Act.
The worm struck few computers throughout May and June of this year, attacking those already infected with the Sub7 Trojan and setting internal clocks to correspond with the US Naval Observatory's clock.
Details are still sketchy, but it is thought that the virus writer was attempting to take control of a number of "zombie" machines which could be used in denial of service attacks on other websites.
Although the FBI's National Infrastructure Protection Centre issued a warning about the worm in June, European users remained largely unaffected by the virus.
Engineer calculates that Chengdu's plan to replace streetlights with artificial moonlight would cost $100bn
Research could also apply to other 'space weather' events involving hot, fast-moving plasma
Dark matter holds the Universe together - and gravitational waves could help identify it
Addison Lee is working on autonomous taxis for commuting and pleasure