The website halo4beta.net issued fake beta invites for the upcoming sequel to scores of users in what was later revealed to be a phishing scam.
Developer 343 Industries' creative director David Ellis was swift to publicly debunk the fraud, but Microsoft has now moved to have the URL transferred over to its ownership, filing a complaint with the National Arbitration Forum.
Microsoft must now provide evidence that the domain name was registered with malicious intent. As the website was involved in global fraud, the Forum is expected to rule in the studio's favour, Fusible reports.
Halo 4 was unveiled at last summer's E3 in Los Angeles. The game will kick off a new Xbox 360 trilogy, following on from the events of Halo 3.
Microsoft will release Halo 4 exclusively on Xbox 360 in late 2012.
Watch Halo 4's debut trailer below: