UPX

Practical executable packing. In reversing, it is usually the wrapper you remove before the real work begins.

When to use UPX

Use UPX when you need to:

• detect and unpack standard UPX-packed malware or challenge binaries
• inspect packing status and compression metadata quickly
• repack a controlled binary for transport or lab exercises

Quick Start

# Inspect packing info
upx -l sample.bin