The Ministry of State Security (MSS) is North Korea's primary counterintelligence service and is an autonomous agency of the North Korean government reporting directly to Kim Jong Un. The MSS is responsible for operating North Korean prison camps, investigating cases of domestic espionage, repatriating defectors, and conducting overseas counterespionage activities.
The United Front Department (UFD) overtly attempts to establish pro-North Korean groups in South Korea such as the Korean Asia-Pacific Committee and the Ethnic Reconciliation Council. The UFD is also the primary department involved in managing inter-Korean dialogue and North Korea's policy toward the South.
North Korea's Reconnaissance General Bureau (RGB) is responsible for clandestine operations. The RGB includes six bureaus charged with operations, reconnaissance, technology and cyber, overseas intelligence, inter-Korean talks, and service support.
The 225th Bureau is responsible for training agents, infiltrating South Korea, and establishing underground political parties focused on fomenting unrest and revolution.