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Mosyle uncovers new cross-platform malware undetected by antivirus tools

<div class="feat-image">(https://9to5mac.com/wp-content/uploads/sites/6/2025/09/bitcoin-phishing-red.jpg?quality=82&strip=all&w=1600)</div><p>After warning (https://9to5mac.com/2025/08/27/mosyle-identifies-new-mac-malware-that-evades-detection-through-fake-pdf-conversion-tool/) 9to5Mac last month about undetectable Mac malware hidden in a fake PDF converter site, Mosyle (https://business.mosyle.com/?utm_campaign=9to5Mac+Security+2024&amp;utm_medium=sponsorship+&amp;utm_source=9to5Mac), a leader in Apple device management and security, has now uncovered a new infostealer. Dubbed ModStealer, the malware has remained invisible to all major antivirus engines since first appearing on VirusTotal nearly a month ago.</p>



<p>In details shared exclusively with 9to5Mac, Mosyle says ModStealer doesn’t just target macOS systems, but is cross-platform and purpose-built for one thing: stealing data.</p>



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Source: Mosyle uncovers new cross-platform malware undetected by antivirus tools (https://9to5mac.com/2025/09/11/mosyle-uncovers-new-cross-platform-malware-undetected-by-antivirus-tools/)