A cyberattack in South Korea on Wednesday took the networks of several companies offline. The networks of three broadcasters and three banks were affected by an attack that disrupted their networks, possibly caused by malware. The identity of the attackers is still unclear. The malware used in the South Korea attacks bears no resemblance to Shamoon or other viruses that have been used in “cyberwar” attacks. But the malware that’s been discovered thus far could not have taken networks down by itself. The convergence of multiple types of attacks suggests a coordinated effort by an organized attacker.”]