Microsoft has named a pair of men already serving jail terms in the UK as defendants in its suit over the Zeus botnet.
The company added Yevhen Kulibaba and Yuriy Konovalenko to an earlier complaint which had previously been limited to aliases and 'John Doe' defendants. Both men are currently serving time in jail for hacking in to bank accounts.
The complaint, originally filed in March, alleges that the men acted as part of a group which harvested user account information.
The Zeus malware has become a favoured tool of cybercriminals for collecting account credentials and other information from users. The infection allows a remote attacker to directly embed code into local HTML files, giving the attacker the ability to turn otherwise legitimate web pages into phishing tools.
While Microsoft has acknowledged that the complaint and subsequent takedown effort would not fully eradicate the Zeus malware, the company reported that known Zeus infections were down from 779,816 to 336,393 between March and June.
"Microsoft and our financial industry partners sought to help protect innocent people by disrupting the Zeus business model and increasing the cost of doing business for cybercriminals," Microsoft digital crimes unit senior attourney Richard Boscovich said in a company blog post.
"I'm happy to report that we are already seeing proof that our disruptive actions were successful in achieving this goal."
Mark Zuckerberg mercilessly trolled by Harvard student newspaper after return to university he dropped out of 12 years ago
'Unauthorised user' blamed by Harvard for insulting Mark Zoinkerberg
Android under attack from 'Judy', Google Play Store malware that has infected up to 36.5 million users
Yet more Android malware discovered on the Google Play Store
Airport believes new system will be more reliable than GPS or Google Maps
OnePlus 3T canned to make way for imminent OnePlus 5 with Snapdragon 835, 8GB memory and dual camera
OnePlus 3T to be prematurely retired on 1 June - perhaps indicating plans for an imminent OnePlus 5 launch