According to the public source data, these airlines use services of the same IT service provider. It came to light that the cyberattack on this IT service provider affected 4,500,000 data subjects globally, including data related to Air India's customers. Compromise of Air India's network In mid-February 2021, Group-IB's Threat Intelligence &amp; Attribution system detected infected devices that were part of Air India's computer network. It took the attackers 24 hours and 5 minutes to spread Cobalt Strike beacons to other devices in the airline's network. ColunmTK Timeline Connections with APT41 Group-IB researchers believe with moderate confidence that the ColunmTK campaign was carried out by APT41, a prolific Chinese-speaking nation-state threat actor. According to Group-IB's Threat Intelligence &amp; Attribution system, the threat actor has been active since at least 2007. APT41 is known for stealing digital certificates for its cyber espionage operations. The IP address was also used to host the Cobalt Strike framework and shared an SSL certificate, b3038101fd0e8b11c519f739f12c7e9b60234d3b, with ColunmTK's IP address 185[.]118[.]166[.]66. The file is very similar to one used by APT41 in a different campaign described by FireEye researchers. The files are very similar in the way they launch a DLL file as a service and create keys in the registry