Reddit has confirmed hackers accessed internal documents and source code following a “highly-targeted” phishing attack.
A post by Reddit CTO Christopher Slowe, or KeyserSosa, explained that on February 5 the company became aware of the “sophisticated” attack targeting Reddit employees. He says that an as-yet-unidentified attacker sent “plausible-sounding prompts,” which redirected employees to a website masquerading as Reddit’s intranet portal in an attempt to steal credentials and two-factor authentication tokens.
Slowe said that “similar phishing attempts” have been reported recently, without naming specific examples, but likened the breach to the recent Riot Games hack, which saw attackers use social engineering tactics to access source code for the company’s legacy anti-cheat system.
Reddit said that hackers successfully obtained an employee’s credentials, allowing them to gain access to internal documents and source code, as well as some internal dashboards and business systems.
Slowe said the company learned of the breach after the phished employee self-reported the incident to Reddit’s security team. Reddit quickly cut off the infiltrators’ access and began an internal investigation.
Reddit, which has more than 50 million daily users, said its investigation found that some contact information for hundreds of current and former employees, as well as some advertiser information, was also accessed. Reddit said it has “no evidence” that personal user data and other non-public data has been stolen, published or distributed online.
Regardless, Reddit has recommended that all users set up two-factor authentication on their accounts and use a password manager. “Besides providing great complicated passwords, they provide an extra layer of security by warning you before you use your password on a phishing site,” Slowe says.
“We’re continuing to investigate and monitor the situation closely and working with our employees to fortify our security skills,” he added. “As we all know, humans are often the weakest part of the security chain.”
Reddit experienced a more serious data breach in 2018 that saw attackers access a complete copy of Reddit data from 2007, comprising the first two years of the site’s operations. This included usernames, hashed passwords, emails, public posts and private messages.
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