Warning: Attackers Are Using DKIM Replay Attacks to Bypass Security Filters

Warning: Attackers Are Using DKIM Replay Attacks to Bypass Security Filters

Cybercriminals are abusing legitimate invoices and dispute notifications from popular services to send scam emails that bypass security filters, according to researchers at Kaseya’s INKY. The attackers have used this technique to impersonate PayPal, Apple, DocuSign, HelloSign, and others.