Cruncher
From Just Solve the File Format Problem
Cruncher is an executable compression utility for DOS, developed by Ori Berger. It compresses EXE files (to EXE), and COM files (converting them to EXE).
The documentation implies that it uses LZW compression.
Identification
Based on limited testing, files compressed by v1.0 have the ASCII signature "CRUNCH" at offset 771. Or maybe a better rule would be that the signature starts 18 bytes before the entry point (refer to MS-DOS EXE#Special file positions).
