Threat actors are compromising up to 100,000 inboxes daily in a campaign that targets gift card and customer-loyalty program data in hopes of reselling it or cashing in on freebies, a security researcher has found. The actors behind the scam—outlined in a post by Brian Krebs on Krebs on Security—have been “mass-testing millions of usernames and passwords against the world’s major email providers each day” for the past three years, according to the post.

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