TL;DR We gave Claude Code, running Sonnet 4.5, an encrypted SonicWall firmware image and a copy of the decrypted filesystem. The instruction was one line: decrypt the image. With no prior knowledge of the format and only occasional input from us, the model reverse engineered SonicWall’s proprietary SWI encryption end-to-end. It traced the decryption logic through a decompiled binary, discovered th...