The incident, possibly the first computer attack to inflict physical harm on the victims, began Saturday, March 22, when attackers used a script to post hundreds of messages embedded with flashing animated gifs.
The attackers turned to a more effective tactic on Sunday, injecting JavaScript into some posts that redirected users’ browsers to a page with a more complex image designed to trigger seizures in both photosensitive and pattern-sensitive epileptics.
RyAnne Fultz, a 33-year-old woman who suffers from pattern-sensitive epilepsy, says she clicked on a forum post with a legitimate-sounding title on Sunday. Her browser window resized to fill her screen, which was then taken over by a pattern of squares rapidly flashing in different colors.
Fultz says she “locked up.”
“I don’t fall over and convulse, but it hurts,” says Fultz, an IT worker in Coeur d’Alene, Ohio. “I was on the phone when it happened, and I couldn’t move and couldn’t speak.”
After about 10 seconds, Fultz’s 11-year-old son came over and drew her gaze away from the computer, then killed the browser process, she says.
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Circumstantial evidence suggests the attack was the work of members of Anonymous, an informal collective of griefers best known for their recent war on the Church of Scientology. The first flurry of posts on the epilepsy forum referenced the site EBaumsWorld, which is much hated by Anonymous. And forum members claim they found a message board thread — since deleted — planning the attack at 7chan.org, a group stronghold.
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