The ninth-grader spent the past two weeks working with Mikko Hyppoenen and other researchers in the lab at the Fininsh antivirus company.
"Otto has a variety of reverse engineering skills," Hyppoenen wrote in a posting to the F-Secure blog on Friday. "He's been writing tools and doing virus analysis for the past weeks. He even published his first virus analysis yesterday."
The two weeks are now over and Otto is going back to school. The researchers are sad to see him leave.