Proofpoint Email Routing Flaw Exploited to Send Millions of Spoofed Phishing Emails
Jul 29, 2024
Email Security / Hacking
An unknown threat actor has been linked to a massive scam campaign that exploited an email routing misconfiguration in email security vendor Proofpoint's defenses to send millions of messages spoofing various popular companies like Best Buy, IBM, Nike, and Walt Disney, among others. "These emails echoed from official Proofpoint email relays with authenticated SPF and DKIM signatures , thus bypassing major security protections — all to deceive recipients and steal funds and credit card details," Guardio Labs researcher Nati Tal said in a detailed report shared with The Hacker News. The cybersecurity company has given the campaign the name EchoSpoofing . The activity is believed to have commenced in January 2024, with the threat actor exploiting the loophole to send as many as three million emails per day on average, a number that hit a peak of 14 million in early June as Proofpoint began to enact countermeasures. "The most unique and powerful part of this domain ...