Two people will share a $250,000 (£143,000) bounty for helping to identify and convict Sven Jaschan as the writer of the damaging Sasser worm.
Microsoft offered the bounty after its Window operating system was targeted by Sasser, and Windows-based computers across the world crashed as a result.
German teenager Jaschan was convicted by a court in northern Germany last Friday for writing and distributing Sasser, after he immediately pleaded guilty to the charges.
Jaschan received 21 months probation and 30 hours of community service. It is believed that Jaschan's schoolfriends had tipped off Microsoft to the identity of Sasser’s creator. Microsoft then informed the German authorities, who arrested him.
Microsoft has not revealed any details about those receiving the reward.
Nancy Anderson, Microsoft vice-president and deputy general counsel, said, “It has been important and gratifying to collaborate with and support law enforcement in this case, and we’re glad to provide a monetary reward to those individuals who provided credible information that helped the German police authorities solve this case.”
The cash will be paid from Microsoft’s anti-virus reward programme.