CLICKFIX: STOPPED AT ⌘+V

Summary from the TLDR InfoSec newsletter

This post details a lightweight macOS defense against ClickFix attacks — now integrated into BlockBlock v2.3.0 — that intercepts ⌘+V keystrokes via NSEvent global monitoring, pauses the terminal process with SIGSTOP, and prompts the user to review clipboard contents before execution. The approach works across major terminal emulators and is particularly effective given that most documented ClickFix campaigns — including recent campaigns by North Korean APT UNC1069 and LLM-propagated attacks — explicitly instruct victims to use the keyboard shortcut. Notable limitations include no coverage for right-click paste operations, a dependency on Accessibility permissions, and Apple's Endpoint Security framework lacking an equivalent ES_EVENT_TYPE_AUTH_PASTE event, making user-space interception the only practical approach.