Cybersecurity researchers have uncovered what they say is technical evidence linking the massive breach at Sony Corp.'s Hollywood studio with attacks in South Korea and the Middle East.

Moscow-based security software maker Kaspersky Lab said Thursday it uncovered evidence that all three campaigns might have been launched by the same group, or facilitated by a single organization skilled in working with destructive malware.

In 2012, cyberattackers damaged tens of thousands of computers in Saudi Arabia's national oil company and Qatar's RasGas with a virus known as Shamoon, one of the most destructive campaigns to date. Some U.S. officials blamed Iran.