REUTERS/Handout
A screen grab of the official website of national carrier Malaysia Airlines after it was hacked on January 26, 2015 by a group calling itself the "Official Cyber Caliphate".
The teen was given a two-year suspended prison sentence and ordered to fight cybercrime, reports the Daily Dot, citing Finnish newspaper Kaleva.
Lizard Squad has taken credit for a slew of big hacks over the last few years, including a massive distributed denial-of-service (DDoS) attack on the PlayStation and Xbox networks, as well as a reported assault on the anonymizing communication service Tor.
Little was known about those behind Lizard Squad, beyond the tweets it sent out and varying reports about the ages and ethnicities of its members.
In December 2014, security journalist Brian Krebs published a post in which he claimed to identify two Lizard Squad members. Not long after Krebs' report went out, authorities seized two alleged hackers - Kivimaki, and one 22 year old from the UK.
In April 2015 Kivimaki was implicated in another cybercrime, this time for facilitating online harassment against a 20-year-old American named Blair Strater. Strater's family was the butt of a string of bullying events reportedly facilitated by Kivimaki. One stunt resulted in thousands of people around the world calling Strater's home in the hopes of getting a free Tesla.
According to the Daily Dot, Kivimaki's charges include "data breaches, felony payment fraud, telecommunication harassments, and other counts relate to fraud and violations of company secrets."
The Finnish paper added that the Finnish teen had been performing illegal hacks since the age of 15.