Opera, situated in Norway, recently declared one network intrusion of a rather frightening type that cyber-criminals attempted on it. In a recently-released brief advisory, Opera stated that its experts, on June 19, 2013, detected, stopped and contained the attack. The attackers managed in acquiring one-or-more software authorization certificate of Opera that was old and obsolete which they actually employed for authorizing their own malware. They were able to disseminate that malware, which wrongly looked as Opera Software-published alternatively looked as the Opera Web-browser.”]
Source: https://informationsecuritybuzz.com/news/cyber-crooks-intrude-opera-networks/