title: How to detect what was the PE packer used on the given exe?
body: <p>I've found an application which seems to be packed. I opened it with some hex editor and it contains "UPX1" section and "3.00 UPX!" string. Unfortunately I'm not able to decompress it with upx latest, it says "not packed by UPX". Is there a way to find out what other PE compressors/crypters were used?</p>