Security

The Volunteer Online Army Fighting Coronavirus Crime

An ad hoc network of hackers is helping secure hospitals and critical infrastructure against phishing, malware, and ransomware.
Illustration: Lia Kantrowitz for Bloomberg Businessweek

By day, Ohad Zaidenberg is a researcher for a private Israeli security firm, where he roots out sophisticated hacking attacks against major corporations. By night he’s applying those skills against all manner of criminals, and for free.

Zaidenberg is one of the founders of a rapidly growing international volunteer network that’s emerged to combat a crime wave targeting hospitals and critical infrastructure during the pandemic. The group, a team of more than 1,200 computer specialists and cyberwarriors, battles the toxic threat of phishing scams, malware hacks, and ransomware.