LGLZ

LGLZ is an executable compression utility for DOS, developed by George Lyapko. It compresses EXE and COM formats.

The software has a  option, to decompress a compressed file.

Format details
LGLZ has some options that may significantly affect the compressed file, including:

-0 - compression method 0 -1 - compression method 1

-f - Use the fast self-extracting module

-u - Create a compressed file, which is unextractable (by this program)

The documentation mentions DIET as an inspiration. LGLZ's compressed files do seem to have some similarity to DIET's.

Identification
(Based on v1.04a-e.)

EXE: Compressed EXE files are observed to have ASCII "" at offset 28.

COM: The 15 bytes starting at offset 3 always seem to be. Following that, at offset 18, is the ASCII string "".

Software

 * [ LGLZ v1.04e]
 * [ LGLZ v1.04e]

Links

 * Archived copy of author's website, listing LGLZ