[pcre-dev] regular expression

Can you tell me how a regular expression can decode a XOR eccrypted

payload.ex:
         rbot 64k :

"(.*)(\\xEB\\x02\\xEB\\x05\\xE8\\xF9\\xFF\\xFF\\xFF\\x5B\\x31\\xC9\\x66\\xB9(.)\\xFF\\x80\\x73\\x0E(.)\\x43\\xE2\\xF9)(.*)$",
     this regular exp. is used to identify an xor decoder. (found in
nepenthes). please help me . thank you