Anyone know of any publicly available modified versions of UPX for ELF? I.e. one that is not able to be unpacked using
upx -d. The unpacking stub in the binary is slightly obfuscated. I am looking to identify the source of these modifications.
UPX is already managing ELF (see: UPX supported executable formats). Or, did I miss the point of your question ?
But, note that UPX is not designed for obfuscation purpose, it mainly aims at compressing the executable.