The "Smallbusinesstax.7z" file is a malicious attachment used in phishing campaigns to distribute malware by exploiting tax-season urgency and vulnerabilities in 7-Zip software. These attacks often deliver Remote Monitoring and Management (RMM) tools designed to steal sensitive data. To protect against these scams, it is crucial to verify email senders, update 7-Zip to version 24.09 or later, and report suspicious activity to the IRS. For more details, visit Microsoft . IRS Warns Small Businesses of Common Scams