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Research Saturday

Research Saturday

When macOS gets frostbite.

· 25 min · Season 9 Episode 404

Show notes

Jaron Bradley, Director of Jamf Threat Labs, is sharing their work on "ChillyHell: A Deep Dive into a Modular macOS Backdoor." Jamf Threat Labs uncovers a newly notarized macOS backdoor called ChillyHell, tied to past UNC4487 activity and disguised as a legitimate applet.

The malware showcases robust host profiling, multiple persistence mechanisms, timestomping, and flexible C2 communications over both DNS and HTTP. Its modular design includes reverse shells, payload delivery, self-updates, and a brute-force component targeting user credentials.

The research can be found here:

⁠ChillyHell: A Deep Dive into a Modular macOS Backdoor

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Website: thecyberwire.com

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