unpacker

Noun

unpacker (plural unpackers)

1. One who, or that which, unpacks.
   • One great advantage of professional unpacking is that the unpackers take away all the wrapping and cartons […]1977, House & Garden, volume 149, page 168
2. A software program that decompresses code or data.
   • All packed malware consists of the unpacker code and packed data, which typically look like random data. The benefit of packed malware, from a malicious author's point of view, is that it cannot be analyzed until it is properly unpacked.2007, David Harley, AVIEN malware defense guide for the Enterprise, page 408