'WannaCry' ransomware showed traces of North Korean code
It hints that an infamous hacking group might be involved.
Microsoft blasts spy agencies for hoarding security exploits
It likens 'WannaCry' to someone stealing Tomahawk missiles.
'WannaCry' ransomware evolves despite attempts to kill it
And the situation is getting worse.
Microsoft patches Windows XP to fight 'WannaCrypt' attacks (updated)
Support for the OS ended three years ago but yesterday's infection spurred the 'unusual' step.
'WannaCry' ransomware attack spreads worldwide (update)
It exploits supposedly NSA-developed vulnerabilities on unpatched Windows systems.