The Pakistan-based advanced persistent threat (APT) actor known asĀ Transparent TribeĀ used a two-factor authentication (2FA) tool used by Indian government agencies as a ruse to deliver a new Linux backdoor called Poseidon. “Poseidon is a second-stage payload malware associated with Transparent Tribe,” Uptycs security researcher Tejaswini Sandapolla said in a technical report published this week.