Post

🚨 New macOS backdoor alert: North-Korean hackers are disguising a Zoom update that drops malware built to hijack laptops and steal data & passwords. If you or your devs run macOS, keep scrolling.👇

The attacker pretends to be a trusted contact → DM on Telegram → Calendly invite → follow-up email with a Zoom link that tells victims to “run this update script.” It's been hyper successful and catching founders/devs off-guard

That script (`zoom_sdk_support.scpt`) hides *10,000 blank lines* scroll forever, never see the payload. The last 3 lines fetch stage-2 from `support.us05web-zoom[.]forum` (notice the look-alike Zoom domain)

Nasty little persistence trick - malware revives itself when killed. It intercepts `SIGINT` / `SIGTERM`, then rewrites LaunchAgents on shutdown. "any user-initiated termination of the malware results in the deployment of the core components, making the code resilient to basic defensive actions."

The data exfiltration: Keychain creds, browser data, Telegram chats, then push over WebSockets - encrypted channel, tricky for network sensors that ignore non-HTTP(S) traffic

macOS isn’t safe just because of Gatekeeper social-engineering + obscure languages (Nim) = new blind spots. Patch, monitor WebSocket egress, & warn employees: *no legit Zoom update arrives as an AppleScript!* RT to keep teams safe.