The Facts

• In a joint advisory published on Thursday, the US, the UK, and South Korea warned that a group of North Korean hackers — dubbed Andariel — have been trying to steal classified military secrets to support Pyongyang's nuclear programs.

• According to the UK's National Cyber Security Centre, Andariel's alleged hostile cyber activities "pose an ongoing threat to critical infrastructure" organizations as well as sensitive and intellectual property data worldwide.

• The FBI has advised defense, aerospace, nuclear, and engineering firms "to remain vigilant," claiming Andariel — the alleged arm of Pyongyang's spy agency — exploited software vulnerabilities to carry out cyberattacks to access classified information.