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ARM-ed and Dangerous: Dylib Injection on macOS

ID: 4b41edd0-cc22-593a-8d5c-6fef28770707

STIX ID: report--4b41edd0-cc22-593a-8d5c-6fef28770707

Feed Name: SpecterOps Blog

Date Published: 2025-08-21

Date Updated: 2026-04-30

Author: West Shepherd

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Technical research detailing an ARM64 Dylib injection technique for Apple Silicon macOS that bypasses direct task_for_pid restrictions by enumerating Mach processor sets to obtain task ports, then allocates memory, patches ARM64 shellcode at runtime, and spawns a remote thread to load a Dylib via dlopen. The post includes full shellcode, C implementation, build steps, and a working demo against a benign target process, and notes that SIP/Hardened Runtime limit injection into hardened apps. It concludes with brief defender guidance emphasizing code-signing enforcement and disk-based Dylib detection opportunities.

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