Chinese hackers, likely state-sponsored, have been broadly targeting government and private-sector organizations across Southeast Asia, including those closely involved with Beijing on infrastructure development projects, according to a report released Wednesday by a U.S.-based private cybersecurity company. Specific targets included the Thai prime minister’s office and the Thai army, the Indonesian and Philippine navies, Vietnam’s national assembly and the central office of its Communist Party, and Malaysia’s Ministry of Defense, according to the Insikt Group, the threat research division of Massachusetts-based Recorded Future. Insikt said it determined that the high-profile military and government organizations in Southeast Asia had been compromised...