The BBC’s technology correspondent, Mark Ward, has written an investigative report into the persistence of some computer viruses.
There are zombies on the internet – odd, undead lumps of code that roam endlessly seeking and finding fresh victims to infect that help keep the whole ugly horde staggering on, and on.
Most of these shambling data revenants are computer viruses and the most long-lived of all are worms.
“Most of those worms are self-spreading – that’s why we still see them moving around,” said Candid Wueest, principal threat researcher at Symantec, who has hunted viruses for years.
Typically, he said, when these malicious programs infected a machine, they kicked off a routine that scanned the entire net looking for other computers vulnerable in the same way as their current host.
When they found one, they installed a copy that also started scanning.
“All it takes is a few machines to get them moving around again,” he added.
Continue Reading: https://www.bbc.co.uk/news/technology-44564709