Ransomware hunters: the self-taught tech geniuses fighting cybercrime

Hackers are increasingly taking users' data hostage and demanding huge sums for its release. They have targeted individuals, businesses, vital infrastructure and even hospitals. Authorities have been slow to respond - but there is help out there

Around 9pm on Monday 23 November 2020, the IT manager for a school in central London received a text message from a colleague, saying the school's website was down. He tried logging on but couldn't. At first, he thought he had forgotten the password. After several attempts, he realised that he was locked out.

The IT manager, Matthew (he asked us not to use his last name), works in a central London neighbourhood where affluence hides pockets of poverty, and migrant families from Pakistan, India and eastern Europe pin their hopes for their children on a small, publicly funded school. It has about 150 students aged between five and 10, many of them on free school meals. On a shoestring budget, in a Victorian building that's showing its age, teachers track the students' progress by photographing them as they learn how to hold a pencil, draw a picture or write their name. The snapshots and other progress reports are uploaded to a server, a powerful computer that processes data and provides services for other devices used around the school.