Estoy hechandole un vistazo a un modulo de joomla que me he bajado.. y tengo una pequeña enigma, me he econtrado varios archivos php con un codigo como este:
Código PHP:
<?php /* The commercial version is not encoded. */$OOO000000=urldecode('%66%67%36%73%62%65%68%70%72%61%34%63%6f%5f%74%6e%64');$OOO0000O0=$OOO000000{4}.$OOO000000{9}.$OOO000000{3}.$OOO000000{5};$OOO0000O0.=$OOO000000{2}.$OOO000000{10}.$OOO000000{13}.$OOO000000{16};$OOO0000O0.=$OOO0000O0{3}.$OOO000000{11}.$OOO000000{12}.$OOO0000O0{7}.$OOO000000{5};$OOO000O00=$OOO000000{0}.$OOO000000{12}.$OOO000000{7}.$OOO000000{5}.$OOO000000{15};$O0O000O00=$OOO000000{0}.$OOO000000{1}.$OOO000000{5}.$OOO000000{14};$O0O000O0O=$O0O000O00.$OOO000000{11};$O0O000O00=$O0O000O00.$OOO000000{3};$O0O00OO00=$OOO000000{0}.$OOO000000{8}.$OOO000000{5}.$OOO000000{9}.$OOO000000{16};$OOO00000O=$OOO000000{3}.$OOO000000{14}.$OOO000000{8}.$OOO000000{14}.$OOO000000{8};$OOO0O0O00=__FILE__;$OO00O0000=0x8a8;eval($OOO0000O0('JE8wMDBPME8wMD0kT09PMDAwTzAwKCRPT08wTzBPMDAsJ3JiJyk7JE8wTzAwT08wMCgkTzAwME8wTzAwLDB4NGEyKTskT08wME8wME8wPSRPT08wMDAwTzAoJE9PTzAwMDAwTygkTzBPMDBPTzAwKCRPMDAwTzBPMDAsMHgxN2MpLCdFbnRlcnlvdXdraFJIWUtOV09VVEFhQmJDY0RkRmZHZ0lpSmpMbE1tUHBRcVNzVnZYeFp6MDEyMzQ1Njc4OSsvPScsJ0FCQ0RFRkdISUpLTE1OT1BRUlNUVVZXWFlaYWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU2Nzg5Ky8nKSk7ZXZhbCgkT08wME8wME8wKTs='));return;?>^qkr9NHenNHenNHe1zfukgFMaXdoyjcUImb19oUAxyb18mRtwmwJ4LT09NHr8XTzEXRJwmwJXLT09NHeEXHr8XhtONT08XHeEXHr8Pkr8XTzEXT08XHtILTzEXHr8XTzEXRtONTzEXTzEXHeEpRtfydmOlFmlvfbfqDykwBAsKa09aaryiWMkeC0OLOMcuc0lpUMpHdr1sAunOFaYzamcCGyp6HerZHzW1YjF4KUSvNUFSk0ytW0OyOLfwUApRTr1KT1nOAlYAaacbBylDCBkjcoaMc2ipDMsSdB5vFuyZF3O1fmf4GbPXHTwzYeA2YzI5hZ8mhULpK2cjdo9zcUILTzEXHr8XTzEXhTslfMyShtONTzEXTzEXTzEpKX==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@mHAigAeU_dX_UB@f
Un saludo y gracias