US energy department confirms it was hit by Sunburst hack

The US energy department is the latest agency to confirm it has been breached in what is being described as the worst-ever hack on the US government. The department is responsible for managing US nuclear weapons, but said the arsenal’s security had not been compromised. 
Tech giant Microsoft also said on Thursday that it had found malicious software in its systems. The treasury and commerce departments are among the other agencies targeted in the sophisticated, months-long breach.