با سلام، مرحله به مرحله توضیح میدم که کامل متوجه بشین:
1- اسکریپت ضمیمه رو دریافت کنید. کار اسکریپت فوق اینه که عبارتهای Hex و Dec رو بهش میدین (مثل x62\141\x73\145\x36\64\x5f\144\x65\143\x6f\144\x65 \) و معادل دیکد شده اون رو به شما تحویل میده (مثلاً دیکد شده عبارت فوق کلمه base64_decode میشه).
2- کار رو با این فایل نمونه شروع میکنیم:
کد HTML:
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?>
اول مرتبش میکنیم و بعد، عبارتهای Hex و Oct رو به کمک string.php دیکد میکنیم و به جای اسم متغیر، مقداری که دیکد کردیم رو میگذاریم و متغیر رو حذف میکنیم. تابع eval رو هم به echo تبدیل میکنیم. خروجی میشه این:
کد HTML:
<?php
echo base64_decode(
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2Y2RlYzhhYmEyOTMoKTs=");
?>
3- این کد رو اجرا میکنیم و این خروجی رو ازش تحویل میگیریم:
کد HTML:
<?php
$q62e1f57062deea58bd3d42d1d2fe11b="\x62";
$y363c28a1aa82365bff0ffb462cc2058="\x65";
$n3fe876ba259655577464cb3a6cbaa92="\x66";
$w0c61295d17096129f71eee463f1cbe2="\x67";
$k55c5270e96792bbf78303427a37182b="\x6d";
$v6dca6d6fcf26c5b5debb871623b208c="\x6f";
$j69ad5dc09be2ec8136d6cdec8aba293="\x6f";
$ec552bbdc3f80ba5afe2d81affacf636="\x6f";
$t44068880f750ea3f31d72b0bc8dd1a8="\x6f";
$e36536dbf0524473474b50eb3054d1a3="\x73";
$y3b2ff260c6e7f7849c09dd93c9b2ebf="\x73";
$s015a1932b7f7fd269ebdfd01826f67e="\x73";
$maf23af3cd6d134b217d247fbc474049="\x73";
$q62e1f57062deea58bd3d42d1d2fe11b.="\141";
$y363c28a1aa82365bff0ffb462cc2058.="\162";
$n3fe876ba259655577464cb3a6cbaa92.="\151";
$w0c61295d17096129f71eee463f1cbe2.="\172";
$k55c5270e96792bbf78303427a37182b.="\144";
$v6dca6d6fcf26c5b5debb871623b208c.="\142";
$j69ad5dc09be2ec8136d6cdec8aba293.="\142";
$ec552bbdc3f80ba5afe2d81affacf636.="\142";
$t44068880f750ea3f31d72b0bc8dd1a8.="\142";
$e36536dbf0524473474b50eb3054d1a3.="\164";
$y3b2ff260c6e7f7849c09dd93c9b2ebf.="\164";
$s015a1932b7f7fd269ebdfd01826f67e.="\164";
$maf23af3cd6d134b217d247fbc474049.="\164";
$q62e1f57062deea58bd3d42d1d2fe11b.="\x73";
$y363c28a1aa82365bff0ffb462cc2058.="\x65";
$n3fe876ba259655577464cb3a6cbaa92.="\x6c";
$w0c61295d17096129f71eee463f1cbe2.="\x69";
$k55c5270e96792bbf78303427a37182b.="\x35";
$v6dca6d6fcf26c5b5debb871623b208c.="\x5f";
$j69ad5dc09be2ec8136d6cdec8aba293.="\x5f";
$ec552bbdc3f80ba5afe2d81affacf636.="\x5f";
$t44068880f750ea3f31d72b0bc8dd1a8.="\x5f";
$e36536dbf0524473474b50eb3054d1a3.="\x72";
$y3b2ff260c6e7f7849c09dd93c9b2ebf.="\x72";
$s015a1932b7f7fd269ebdfd01826f67e.="\x72";
$maf23af3cd6d134b217d247fbc474049.="\x72";
$q62e1f57062deea58bd3d42d1d2fe11b.="\145";
$y363c28a1aa82365bff0ffb462cc2058.="\147";
$n3fe876ba259655577464cb3a6cbaa92.="\145";
$w0c61295d17096129f71eee463f1cbe2.="\156";
$v6dca6d6fcf26c5b5debb871623b208c.="\145";
$j69ad5dc09be2ec8136d6cdec8aba293.="\145";
$ec552bbdc3f80ba5afe2d81affacf636.="\147";
$t44068880f750ea3f31d72b0bc8dd1a8.="\163";
$e36536dbf0524473474b50eb3054d1a3.="\137";
$y3b2ff260c6e7f7849c09dd93c9b2ebf.="\137";
$s015a1932b7f7fd269ebdfd01826f67e.="\160";
$maf23af3cd6d134b217d247fbc474049.="\164";
$q62e1f57062deea58bd3d42d1d2fe11b.="\x36";
$y363c28a1aa82365bff0ffb462cc2058.="\x5f";
$n3fe876ba259655577464cb3a6cbaa92.="\x5f";
$w0c61295d17096129f71eee463f1cbe2.="\x66";
$v6dca6d6fcf26c5b5debb871623b208c.="\x6e";
$j69ad5dc09be2ec8136d6cdec8aba293.="\x6e";
$ec552bbdc3f80ba5afe2d81affacf636.="\x65";
$t44068880f750ea3f31d72b0bc8dd1a8.="\x74";
$e36536dbf0524473474b50eb3054d1a3.="\x72";
$y3b2ff260c6e7f7849c09dd93c9b2ebf.="\x72";
$s015a1932b7f7fd269ebdfd01826f67e.="\x6f";
$maf23af3cd6d134b217d247fbc474049.="\x6f";
$q62e1f57062deea58bd3d42d1d2fe11b.="\64";
$y363c28a1aa82365bff0ffb462cc2058.="\162";
$n3fe876ba259655577464cb3a6cbaa92.="\147";
$w0c61295d17096129f71eee463f1cbe2.="\154";
$v6dca6d6fcf26c5b5debb871623b208c.="\144";
$j69ad5dc09be2ec8136d6cdec8aba293.="\144";
$ec552bbdc3f80ba5afe2d81affacf636.="\164";
$t44068880f750ea3f31d72b0bc8dd1a8.="\141";
$e36536dbf0524473474b50eb3054d1a3.="\145";
$y3b2ff260c6e7f7849c09dd93c9b2ebf.="\157";
$s015a1932b7f7fd269ebdfd01826f67e.="\163";
$maf23af3cd6d134b217d247fbc474049.="\153";
$q62e1f57062deea58bd3d42d1d2fe11b.="\x5f";
$y363c28a1aa82365bff0ffb462cc2058.="\x65";
$n3fe876ba259655577464cb3a6cbaa92.="\x65";
$w0c61295d17096129f71eee463f1cbe2.="\x61";
$v6dca6d6fcf26c5b5debb871623b208c.="\x5f";
$j69ad5dc09be2ec8136d6cdec8aba293.="\x5f";
$ec552bbdc3f80ba5afe2d81affacf636.="\x5f";
$t44068880f750ea3f31d72b0bc8dd1a8.="\x72";
$e36536dbf0524473474b50eb3054d1a3.="\x70";
$y3b2ff260c6e7f7849c09dd93c9b2ebf.="\x74";
$q62e1f57062deea58bd3d42d1d2fe11b.="\144";
$y363c28a1aa82365bff0ffb462cc2058.="\160";
$n3fe876ba259655577464cb3a6cbaa92.="\164";
$w0c61295d17096129f71eee463f1cbe2.="\164";
$v6dca6d6fcf26c5b5debb871623b208c.="\143";
$j69ad5dc09be2ec8136d6cdec8aba293.="\146";
$ec552bbdc3f80ba5afe2d81affacf636.="\143";
$t44068880f750ea3f31d72b0bc8dd1a8.="\164";
$e36536dbf0524473474b50eb3054d1a3.="\154";
$y3b2ff260c6e7f7849c09dd93c9b2ebf.="\61";
$q62e1f57062deea58bd3d42d1d2fe11b.="\x65";
$y363c28a1aa82365bff0ffb462cc2058.="\x6c";
$n3fe876ba259655577464cb3a6cbaa92.="\x5f";
$w0c61295d17096129f71eee463f1cbe2.="\x65";
$v6dca6d6fcf26c5b5debb871623b208c.="\x6c";
$j69ad5dc09be2ec8136d6cdec8aba293.="\x6c";
$ec552bbdc3f80ba5afe2d81affacf636.="\x6f";
$e36536dbf0524473474b50eb3054d1a3.="\x61";
$y3b2ff260c6e7f7849c09dd93c9b2ebf.="\x33";
$q62e1f57062deea58bd3d42d1d2fe11b.="\143";
$y363c28a1aa82365bff0ffb462cc2058.="\141";
$n3fe876ba259655577464cb3a6cbaa92.="\143";
$v6dca6d6fcf26c5b5debb871623b208c.="\145";
$j69ad5dc09be2ec8136d6cdec8aba293.="\165";
$ec552bbdc3f80ba5afe2d81affacf636.="\156";
$e36536dbf0524473474b50eb3054d1a3.="\143";
$q62e1f57062deea58bd3d42d1d2fe11b.="\x6f";
$y363c28a1aa82365bff0ffb462cc2058.="\x63";
$n3fe876ba259655577464cb3a6cbaa92.="\x6f";
$v6dca6d6fcf26c5b5debb871623b208c.="\x61";
$j69ad5dc09be2ec8136d6cdec8aba293.="\x73";
$ec552bbdc3f80ba5afe2d81affacf636.="\x74";
$e36536dbf0524473474b50eb3054d1a3.="\x65";
$q62e1f57062deea58bd3d42d1d2fe11b.="\144";
$y363c28a1aa82365bff0ffb462cc2058.="\145";
$n3fe876ba259655577464cb3a6cbaa92.="\156";
$v6dca6d6fcf26c5b5debb871623b208c.="\156";
$j69ad5dc09be2ec8136d6cdec8aba293.="\150";
$ec552bbdc3f80ba5afe2d81affacf636.="\145";
$q62e1f57062deea58bd3d42d1d2fe11b.="\x65";
$n3fe876ba259655577464cb3a6cbaa92.="\x74";
$ec552bbdc3f80ba5afe2d81affacf636.="\x6e";
$n3fe876ba259655577464cb3a6cbaa92.="\145";
$ec552bbdc3f80ba5afe2d81affacf636.="\164";
$n3fe876ba259655577464cb3a6cbaa92.="\x6e";
$ec552bbdc3f80ba5afe2d81affacf636.="\x73";
$n3fe876ba259655577464cb3a6cbaa92.="\164";
$n3fe876ba259655577464cb3a6cbaa92.="\x73";
$t44068880f750ea3f31d72b0bc8dd1a8();
if($k55c5270e96792bbf78303427a37182b($y363c28a1aa82365bff0ffb462cc2058("\x5c\50\x22\133\x30\55\x39\101\x2d\132\x61\55\x7a\134\x2b\57\x3d\135\x2a\42\x5c\51","\x28\42\x22\51",$e36536dbf0524473474b50eb3054d1a3("\r\n","",$n3fe876ba259655577464cb3a6cbaa92($maf23af3cd6d134b217d247fbc474049(__FILE__,"\x28")))))=="\x31\141\x30\66\x30\71\x30\141\x63\145\x36\67\x65\143\x34\65\x34\65\x61\64\x35\146\x34\65\x32\70\x63\65\x34\144\x37\60") {
@eval($w0c61295d17096129f71eee463f1cbe2($q62e1f57062deea58bd3d42d1d2fe11b($y3b2ff260c6e7f7849c09dd93c9b2ebf("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"))));
}
$s015a1932b7f7fd269ebdfd01826f67e($ec552bbdc3f80ba5afe2d81affacf636(),"\x30\61\x34\64\x30\62\x30\61\x64\65\x33\70\x34\144\x37\67\x35\62\x66\146\x35\64\x34\142\x61\143\x30\144\x62\70\x63\143")?$v6dca6d6fcf26c5b5debb871623b208c():$j69ad5dc09be2ec8136d6cdec8aba293();
?>
4- دوباره مرحله قبل رو برای این کد تکرار میکنیم و خروجی میشه این:
کد HTML:
<?php
ob_start();
if(md5(ereg_replace('\("[0-9A-Za-z\+/=]*"\)','("")',str_replace("\r\n","",file_get_contents(strtok(__FILE__,"(")))))=="1a06090ace67ec4545a45f4528c54d70") {
echo(gzinflate(base64_decode(str_rot13("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"))));
}
strpos(ob_get_contents(),"01440201d5384d7752ff544bac0db8cc")?ob_end_clean():ob_end_flush();
?>
5- ما از این کد فقط دستور echo رو لازم داریم. پس بقیه رو حذف میکنیم و کد رو اجرا میکنیم و برای بار آخر، از string.php کمک میگیریم و بعد از دیکد کردن Hexها و Octها و مرتب کردن، این خروجی رو تحویل میگیریم:
کد HTML:
<?php
defined('no_direct') or die('Restricted access');
function add_save() {
$etchat_id = $_POST['etchat_id'];
$etchat_user_fid = $_POST['etchat_user_fid'];
$etchat_text = $_POST['etchat_text'];
$etchat_text_css = $_POST['etchat_text_css'];
$etchat_timestamp = $_POST['etchat_timestamp'];
$etchat_fid_room = $_POST['etchat_timestamp'];
$etchat_privat = $_POST['etchat_timestamp'];
$sql = "INSERT INTO `db1_etchat_messages` (`etchat_id`,`etchat_user_fid`,`etchat_text`,`etchat_text_css`,`etchat_timestamp`,`etchat_fid_room`,`etchat_privat`) VALUES ('{$etchat_id}','{$etchat_user_fid}','{$etchat_text}','{$etchat_text_css}','{$etchat_timestamp}','{$etchat_fid_room}','{$etchat_privat}')";
mysql_query($sql) or die(mysql_error());
}
?>
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نکته: برای دیکدکردن چنین کدهایی، اول ابزارهایی مثل string.php رو برای خودتون طراحی کنید تا کار دیکد کردن سریعتر و راحتتر بشه.
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موفق باشید.