Major cryptocurrency hardware wallet producer Trezor warned that all the users that are registered to its newsletter should expect to be targeted by phishing attacks—but not only Trezor customers are affected. What Happened Trezor warned in a Sunday tweet that it was investigating “a potential data breach of an opt-in newsletter hosted on Mailchimp” and that users should avoid opening emails from “noreply@trezor.us.” The company explained that its marketing and automation email management software Mailchimp was compromised by an insider who was targeting cryptocurrency companies. Trezor took down the phishing domain and recommended that users ensure they “are using anonymous email addresses for bitcoin-related activity.” According to a Monday TechCrunch report, Mailchimp confirmed a data breach after hackers compromised an internal tool to access customer accounts, which goes to show that not only Trezor and its users are affected by the breach. The company’s chief information security officer Siobhan Smyth said that the …