On December 27, a U.S. district court unsealed documents detailing work Microsoft has performed to disrupt cyberattacks from a threat group we call Thallium, which is believed to operate from North Korea. Our court case against Thallium, filed in the U.S. District Court for the Eastern District of Virginia, resulted in a court order enabling Microsoft to take control of 50 domains that the group uses to conduct its operations. With this action, the sites can no longer be used to execute attacks.