The Windows worm is back – and this time it’s serious

“It’s pretty aggressive, and it’s replicating very quickly.” That reads like the words of stressed system administrator affected by last week’s WannaCry (Wanna Decryptor) ransomware – but actually, that’s the reaction of a security expert from 13 years ago to a new variant of the Sasser worm. WannaCry’s ransomware high jinks apart, the echoes with last Friday’s events are intriguing.

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