The who, what, and why of the attack that has shut down Stryker’s Windows network”

Within hours of the US and Israel launching airstrikes on Iran two weeks ago, security professionals warned organizations around the world to be on heightened watch for destructive retaliatory hacks. On Wednesday, the predictions appeared to come true as Stryker, a multinational maker of medical devices, confirmed a cyberattack that took down much of its infrastructure, and a hacking group long known to be aligned with the Iranian government claimed responsibility.

Where things stand

When and how did the attack come about?

The first indications were social media posts and a report from a news organization in Ireland. Messages posted by purported Stryker employees or their family members on social media said workers’ phones and computers had been wiped. A report the Irish Examiner published Wednesday morning, citing multiple anonymous sources, made the same claims and said some employees witnessed login pages on wiped devices displaying the logo of Handala ...