Operation C-Major is a cyber espionage campaign attributed to a Pakistan-based advanced persistent threat group active since at least 2013, commonly known as Transparent Tribe or APT36. The group's primary motivation is intelligence gathering to support Pakistani national security and geopolitical objectives. This group is distinguished by its persistent targeting of Indian government, military, diplomatic, and educational entities, consistently adapting its tactics and tools. Notably, Operation C-Major frequently leverages local languages and current geopolitical events in its spear-phishing campaigns to enhance credibility, and has shown an evolution in techniques, including the use of deepfake technology to impersonate key individuals and an increased focus on zero-day vulnerabilities. While related to groups like APT28 and Turla in some analyses, it is primarily identified with its Pakistan nexus and a consistent focus on South Asian targets.