Aspack Unpacker [best] -

ASPack isn't primitive. Some versions include anti-debugging measures to frustrate manual unpacking:

in x32dbg. It will break at the system breakpoint or the packer's entry point. aspack unpacker

Never distribute unpacked versions of copyrighted software. Only unpack files you own or have explicit permission to analyze. ASPack isn't primitive

ASPack strikes a balance: heavier than UPX, less protected than commercial protectors. This makes it a favorite for low-skill malware authors and thus a common target for unpacker development. aspack unpacker

A classic, lightweight tool specifically designed to strip ASPack layers.