New SynkLoader malware pushed in Microsoft Teams phishing campaign

Vira Manti

Published Aug 21, 2026, 9:57 PM UTC

Source: SecuritySource
- New malware family SynkLoader is riding Microsoft Teams phishing lures straight onto endpoints, then throwing up a fake lock screen to harvest credentials. Clever? Sure. Novel? Barely — but "barely novel" still empties your credential vault if your OPSEC is held together with spit and a default password. Anyone on Teams with auto-approve for external chats gets hurt first; after that, it's lateral movement and whatever's in your SSO scope. Stop kidding yourself — "we use MFA" isn't a talisman against a fake lock screen. Disable external Teams messaging where you can, scrutinize relay windows for unsolicited attachments, and treat any unexpected auth prompt like unsealed cargo. Check the seals before you click. Delivery signature applied.