Fake MyChart messages used to steal logins and spread malware

Security warnings have described phishing campaigns that copy the MyChart patient portal to trick people into entering their login details. Some of the fake messages also use alarming medical claims and prompts that can lead Windows users to run a file or command that installs malware. The reports say these scams imitate the real portal, but they are not a breach of MyChart itself. This matters because healthcare messages are trusted, so a convincing fake can easily reach employees, customers, or patients who are expecting real updates. For a business, Sender Registry helps spot impersonation and suspicious sender patterns before a message is trusted, reducing the chance that staff will hand over credentials or open a malicious link or attachment.