在上一篇文章中做代码审计的时候，提到过 phpjm 混淆的解密还原，后面有一些小伙伴私信问具体过程，本篇就展开说说。

0x00 前言

在上一篇文章：https://forum.butian.net/share/1206 中做代码审计的时候，提到过 phpjm 混淆的解密还原，后面有一些小伙伴私信问具体过程，本篇就展开说说。

下面是上次文章所举例过的系统的其中一个经过混淆的文件

<?php 
$O00OO0=urldecode("n1zb/ma5\vt0i28-pxuqy*6lrkdg9_ehcswo4+f37j");$O00O0O=$O00OO0{3}.$O00OO0{6}.$O00OO0{33}.$O00OO0{30};$O0OO00=$O00OO0{33}.$O00OO0{10}.$O00OO0{24}.$O00OO0{10}.$O00OO0{24};$OO0O00=$O0OO00{0}.$O00OO0{18}.$O00OO0{3}.$O0OO00{0}.$O0OO00{1}.$O00OO0{24};$OO0000=$O00OO0{7}.$O00OO0{13};$O00O0O.=$O00OO0{22}.$O00OO0{36}.$O00OO0{29}.$O00OO0{26}.$O00OO0{30}.$O00OO0{32}.$O00OO0{35}.$O00OO0{26}.$O00OO0{30};eval($O00O0O("JE8wTzAwMD0iZ0pqUU5IUkx5RGJoU0luTXF0R29LbHB3eG16QlhUdk9rc2VpYWZQWmRyY0FWVUNFRnVZV2VtWmtpbkVhVXh5c0FkcVdMSXZ1T0hnVEpOekdvYmZjU2p3aHB0ckJSRE1QUVZYWUtGQ2xyeDlUcG5QaVhONXN5bFF6TXZLWkJBR1p5M21Ib3ZKZ0NaamVDMkpzTTNXZUV2ZGV3VUdUTU5IMkNvRUhkWEV6Qm9tMkJvZDdkbkdVcG9Cc1J2VmVtbkdVQmJqZU1ubWdSTkswQkFHelJ2SzBwbFdlbXZIRk0zRXN5TmlIY1VHVFJsbWpwbFdlTTNFc1J2SFpkdkIxeU5pMHBsOUZkdlJIUllIRk0zRXN5TmlIT1hIN2R2SE5PdlFJTW5FNU9uaUh5dkM2Y2hFZ3lxaTBDbDVaQkFTZ3dVR3pCbEpOY1p1U3BsNXpSdktGQzJWOXlOUTNkbmlIeXZDdU9iamV0QUdVQm9FMU1ONGVNMlFqQlp1Nm12SEZNM0VzeU5pSGNVRzlkbkdVcG9Cc1J2VmVCcVFGQzNFZ3kyNGVvMTlaeXY5RkJBZWd3MzBlTW5tZ1JOSzBCQUdOUmw1WlJ2SGZ5aEd0bzJpZnlxaTBNcVFaUlhlZ2RuamVSbm01ZG5qZW1uRXVwb1dlYWI0ZU0yUVVSTlFVZHgwZXlOUTNkS0prRVk4dW0yMTVNM0tqY05zZk0zazltVVBGZFlpZnlOQmdCenU2QjJRME9YUlNDaDV1eTNpMG1VU2VhaFBxYzNHZk1xazltVVBGZFlpZnlOQmdCenU2QjJRME9YUlNDaDVUeTNtMG1VU2VhaFBxYzJFaHlOS0lCYjBxZFg0ZWsyOUZCTkhxY1pncUJva3VtMkVoYU41c3lsVnFPQVRlazI5RkJOSHFjWmdxQm9rdW0yRWhhcVF6Qm9kcU9BVGVrMjlGQk5IcWNaZ3FCb2t1bTJFaGFxRzNtVVNnY1VQU1J2c2dNVVBJcmhHekJvbTJCb2RlYWI0ZU0yUTBrb0UwTU5IaFJvRUhPS0prRVk4NmNTS1ZRS210RVFtQWJWOVlFQVRlb0tHWWJ6dTZFUW1BYlY5WUVROUtsWWlLVktFbWIwNGdjVVBTUnZzZ01VUElyaEd6Qm9tMkJvZGVhYjRlQm9zSENVZWhNMlEwZHY1c3lsUXpkblEwQlplaE9iamVtbkV1cG9XZWFiNGVNbm1IZHgwZWsyOUZCTkhxY1pncUJva3VtMkVoYXFFc0NOSkhNbm1IbVVTN2RuMGVDMkswQzJldW9LR1liMFE0QzJRVFJ2SGZ5aFBTQkFTZXdVR0h3dkgwT1hFSGRYMCtkdlJIUlkxSE0zaXNCMlZ1T0FTN2RuMGV0QUdUUmxtanBsV2VCcVFGQzNFZ3kyNGVNM0tqT1hFSlJsUVV3QVNld1VHME1xU2V3VVBTYmw5U0JsVGVyQVBTUnZzZ01VUElyaEd6Qm9tMkJvZGVhYjRlTW5tSE12S1VCQWVTTW9RSE1xU2djVVBTYmw5U0JsVGVhYjRlQm9zSEMzUTBCQWVnY1VQU3lROVNDb0VzZHgwZW1ZMWZCdlFqZFgwK2R2QkhSdml1a2xKak9LSmtFWTg2Y1NCS1FZaWRvMEtiVjA5eE9iamVNTlEwUm9tRmRYRUlvMkVzUnZZN2RuMGVDMkswQzJldW9LR1liMFE0QzJRVFJ2SGZ5aFBTQkFTZXdVR0h3dkgwT1hFSGRYMCtkdlJIUlkxSE0zaXNCMlZ1T0FTN2RuMGV0QUdUUmxtanBsV2VCcVFGQzNFZ3kyNGVwbDV6Qm9tME9YRTBDbG1qQkFUZW12S1VNTks1YVhFZ00xOWpDb2kwQWw1ekJvbTBBbGs5RVNLV1YwVmdkbmplUm5tNWRuamVtdkhGUnY4ZXJBUGhkWmplbW5Cc3lYUDlkdktVTU5LNU9YUzdkWEVneXFpSE1xRXR5cVFJZHgwZVd4amVtdmlVQmxLMEJROUlCb0V1eTJrZXJBUHFtemplQk45VUJsS1pwWFB1bXZLVU1OSzVkdkt6ZFhFREJvU2VyYjRlbW5Cc3luUUhPQUc3ZFhFZ3lxRWZkWDQ5ZFhtN212SUh3bzBqZFpqZW1uQnN5S0lSZHgwZW1uQnN5blFIY1VQU3BsNXpCb20wbzI1MXlBakRjVUc5ZHZCZk1oUHVtdlNlckFQVGNVUFNwQVA4ZFhFZ3lxaUhNcUV0eXFRSWNVUFNwQWpET0FHN2RYRVpNTlFzUnZRdHlsUTBwdjlTZFg0OWRYTS9hWE03ZG4wZW12aVVCbEswQlE5SUJvRXV5MmtlckFHVVJubWd5QWVTQzNtSENvRUhvMjFIUnZzZkJYVGVkaFRoT2JqZW12SEZSdjhlckFHVVJubWd5QWVTcGw1MHlVVGVkaFRoT2JqZW1ZMWZCdlFqZHgwZW1uRXVwb1dlYWI0ZU0yUVVSTlFVZFgwK2RuR1VCb0dzTU5WdWROSEZNMlFVUlhHZ3lxRWZkbmpTUnZzZ01VUElyaEdUTU5ROXdVRTBDbG1qQm8wZU9ualNwbDUweTMwZ2RuQnN5blFITVVQdXdVRVpNTlFzUnZRdHlsUTBwdjlTdEFTaE9iamVtdlE0QkFQOWRYRWl5MkVIeVhQSXJoR0h3dlFaUm9FSE9YRTJDbFRnY1VHZ0JoUHVkQUVnTTE5akNvaTBBbDV6Qm9tMEFsa2dkbmplTU5RMFJvbUZkWEVId3ZWN2RuMGVCbEp6QkFHN2RYRUlCb0V1eTJFdHBsa2VyQVBTUnZzZ01VUElyaEd6Qm9tMkJvZGVhYjRleXZLelJZSEZNMlFVUllIU09YUzdkbm1IUm5RVXloUFN5bFEwcHY5U28ySFNjVUc5ZG4wZUMySzBDMmVlT0tKa0VZOUt3dmlITW5FZ3kyNGVtdlZnZG5qZUJvc2dSWGVTQkFQSXJoR3FCb0VpQm9pekNsUkhPWFNnY1VHOWRuMGVNblFoeXZIWmR2QjF5TmkwcGw5RmRuaUh5dlFaUlhlU1J2S2h5dlZqbW5SdUJvbUhkeDBlbVVNamRYRUx5MkhGZHgwZW1VTWpkWEVTQm9pWmR4MGVtVU1qZFhFanBsMWdSWFA5ZFhNcWFYRU5wbFFqQlhQOWRYTXFPb2plUm5tNWRuamVtdkhOUjJzSE1OVmVyQVBxbXpqZW12OVVCdlFVZHgwZW1VTTdkWEVTQm9pWm8ySmd5bEgwZHgwZW1VTTdkdkhOZFhlc2R2UUlNbkU1T1hFM3B2UVVCQVNnZG5qZW12SE5SMnNITU5WZXJBUGhSMnNITU5WZXdVRTNwdlFVQm8waGNVRzlkdkhOZFhlc2R2UUlNbkU1T1hFU0JvaVpPQVNld1VQU3kzbVNCb2RlckFQaHkzbVNCb2RlQ3FTZXdVRVNCb2ladEFHU0JvaVpkWmpldEFHZ0JoUHVkQUdIeW9HMHdBZVN5dkhJcG9rZ09BRzdkWEVTQm9pWm8ySmd5bEgwZHgwZWROSmd5bEgwZG5qU3l2SElwb0U5ZFpqZXRBR0h5b0cwd0FlU0JOSEh5dmtnZHg4ZW12QmdCbEpTZHgwZWRodWhkeHVlRVNLV1YwVjdkWEV6TWxUZXJBUGhWMFFXRVZpVmRualNCTkhIeXZFOWRZQkFiMDBld1VFMHB2SHpkWDArZG5HVUJvMTdtbkVzQ05KSHRBRzdtdmdmcGw1OWRualNwbEIzcHZRVUJvMGV3VUVmTU5FSE1xMGV3VUVTQm9pWm8ySmd5bEgwdEFkN2RYRXpNbFRlckFHelJubXRNTlFUeXZLWkJBZXFNbm1Ib1VNam1uRXVwb1dlYWI0ZU1ubUhhWFBTTTNLak9iamVtWTFmQnZRamR4MGVtbkV1cG9XSXJxaUhNcUJITWgwK01ubUhNdktVQkFlU00zS2pPYmplbVkxZkJ2UWphYjVId3ZRWlJvRUhPWFM3ZFhFSW8yRXNSdlllckFQU2JsOVNCbFRJck5CSFJ2aXVrbEpqT0tKa0VZODZjU0JLUVlpZG8wS2JWMDl4T2JqZU1OUTBSb21GZFhFSW8yRXNSdlk3ZG4wZUMySzBDMmVlT0tKa0VZOUt3dmlITW5FZ3kyNGVtdlZnZG5qZUJvc2dSWGVTQkFQSXJoR3FCb0VpQm9pekNsUkhPWFNnY1VHOWRuMGVNblFoeXZIWmR2QjF5TmkwcGw5RmRuUVRCdkswQkFlU1J2S2h5dlZqbXZLVU1OSzVhWFBTUjJzSE1OVmVyQVBxbVVIN2RuRVV3QUc3ZFhFU0NvRXNkeDBlZGhkN2RYRTFNdkVzUnZRdEJ2SzBDQVA5ZHZLVU1OSzVPWFM3ZFhFZ0JxUnVCb21IZHgwZW1VTTdkdkJmTU5Rc0MyZWVPWEVzTXFtc3dBR3NNVVBTcDJRNWR4MCtkWEUyQ2xKMUJBU2V3VVBTQnZLMENBUEZyQVBod1VFREJvSDlyYjhqZFpqZW1uUVRCdkswQlE5U0NvRXNsMTBlckFQU1JOS2pSbFY3ZG4wZW12RXNSdlllckFHVVJubWd5QWVTQnZLMENBVGVkaFRoT2JqZXBsQ2VPWFllQmwxVFJuU3VtblJ1Qm9tSE9BU2V3VVBTcGxCM3B2UVVCQVA5ZFhtM3B2UVVCQUc3bW5SdUJvbUh0QWQ3ZG4wZW1ZMWZCdlFqZHgwZW1uRXVwb1dJcnFpSE1xQkhNaDArTW5tSE12S1VCQWVoUm9HU0NvRUhkbmpTUnZzZ01VUElyaEdUTU5ROXdVRTBDbG1qQm8wZU0yUTBkbmpTQnZLMENvMGV3VUVnQnFSdUJvbUh0QWRnY1VQU0Jvc0hkeDBlbVkxZkJ2UWphYjVId3ZRWlJvRUhPWEUxTXZFc1J2UXRCdkswQ0FTN2RubUhSblFVeWhQU0Jvc0hjVUc5ZHZpc1J2aXVkWHNNVllFckVvc1pCb0cwcGw5RmRYRUhPQUc3ZHZRNHBva3VtdlZlYWI0ZUIyUTBibFF6TTJLcUJBZWdPYmpldEFHOWRuRzFDTkpnQ1VHTlJsNVpSdkhmeWhHU0JsSkhSdlZ1bW5Fc0NOSkhhWEUzcHZRVUJBUDlkWE1xT29qZVJubTVkbmplcGxDZU9YWWVCbDFUUm5TdW1uUnVCb21IT0FTZXdVUFNwbEIzcHZRVUJBUDlkWG0zcHZRVUJBRzdtblJ1Qm9tSHRBZDdkbjBlbVkxZkJ2UWpkeDBlbW5FdXBvV0lycWlITXFCSE1oMCtNbm1ITXZLVUJBZWhFWVFXRVFFS2RZQkFiMDBld1VFMHB2SHpkWDArZG5HVUJvMTdtbkVzQ05KSHRBRzdtdkhOUjJzSE1OUTlkaFM3ZFhFU0JsVGVyQVBTYmw5U0JsVElyTlE0QmxpMVJ2VnVPYmplTU5RMFJvbUZkWEVTQmxUN2RuMGVDMkswQzJlZU9LSmtFWTlLd3ZpSE1uRWd5MjRlbXZWZ2RuamVCb3NnUlhlU0JBUElyaEdxQm9FaUJvaXpDbFJIT1hTZ2NVRzlkbjBlTW5RaHl2SFpkdkIxeU5pMHBsOUZkdjlUQmw1Vk1OS0ZNMktaUnZIZnloZWd3VVBTUnZzZ01VMCtNMlFVUk5RVWFiNWhCbFJneUhFVUNsNXpDbGkwcGw5Rk9YUzdkbjBlTW5RaHl2SFpkdkIxeU5pMHBsOUZkdmlmeWwxZ1JYZWd3VVBTUnZzZ01VMCtNMlFVUk5RVWFiNVp5MjFJcG9rdU9iamV0QUdUUmxtanBsV2VCcVFGQzNFZ3kyNGVNTjlqeVltc0MyanVPb2plbW5FdXBvV0lycWlITXFCSE1oMCtNTjlqeVltc0MyanVPYmpldEFHVFJsbWpwbFdlQnFRRkMzRWd5MjRlbzE5U0JvaTBNcVFaUlhlZ2RuamVtbkV1cG9XZWFiNGVNMlFVUk5RVWR4MGV5cVFqeXhqZXRBRzlkeDgrIjtldmFsKCc/PicuJE8wME8wTygkTzBPTzAwKCRPTzBPMDAoJE8wTzAwMCwkT08wMDAwKjIpLCRPTzBPMDAoJE8wTzAwMCwkT08wMDAwLCRPTzAwMDApLCRPTzBPMDAoJE8wTzAwMCwwLCRPTzAwMDApKSkpOw=="));
 ?>

我们就从手动解混淆、debug解混淆、写脚本解混淆三个方向去说

0x01 手动解混淆

首先将代码中的eval替换成echo，并且执行 php 文件

然后把执行输出的代码复制替换掉前面整个echo语句，即如下

接着重复工作，继续把下面的eval函数替换成echo输出

接着继续执行，重复如此，最终成功还原成原来的代码

0x02 debug解混淆

这里我使用的是 vscode + Xdebug + PHP Debug(vscode插件)
首先格式化一下代码，并且打上断点，选择单文件调试，即Launch currently open script

然后 F5 启动调试，接着 F11 走单步调试

可以看到变量不断的被赋值，接着一直按 F11 单步调试，最后跟完得到还原后的代码

0x03 编写脚本

这里我们看一道 bugku平台上的题：《getshell》

代码如下

<?php
define('pfkzYUelxEGmVcdDNLTjXCSIgMBKOuHAFyRtaboqwJiQWvsZrPhn', __FILE__);
$cPIHjUYxDZVBvOTsuiEClpMXAfSqrdegyFtbnGzRhWNJKwLmaokQ = urldecode("n1zb/ma5\vt0i28-pxuqy*6lrkdg9_ehcswo4+f37j");
$BwltqOYbHaQkRPNoxcfnFmzsIjhdMDAWUeKGgviVrJZpLuXETSyC = $cPIHjUYxDZVBvOTsuiEClpMXAfSqrdegyFtbnGzRhWNJKwLmaokQ{3} . $cPIHjUYxDZVBvOTsuiEClpMXAfSqrdegyFtbnGzRhWNJKwLmaokQ{6} . $cPIHjUYxDZVBvOTsuiEClpMXAfSqrdegyFtbnGzRhWNJKwLmaokQ{33} . $cPIHjUYxDZVBvOTsuiEClpMXAfSqrdegyFtbnGzRhWNJKwLmaokQ{30};
$hYXlTgBqWApObxJvejPRSdHGQnauDisfENIFyocrkULwmKMCtVzZ = $cPIHjUYxDZVBvOTsuiEClpMXAfSqrdegyFtbnGzRhWNJKwLmaokQ{33} . $cPIHjUYxDZVBvOTsuiEClpMXAfSqrdegyFtbnGzRhWNJKwLmaokQ{10} . $cPIHjUYxDZVBvOTsuiEClpMXAfSqrdegyFtbnGzRhWNJKwLmaokQ{24} . $cPIHjUYxDZVBvOTsuiEClpMXAfSqrdegyFtbnGzRhWNJKwLmaokQ{10} . $cPIHjUYxDZVBvOTsuiEClpMXAfSqrdegyFtbnGzRhWNJKwLmaokQ{24};
$vNwTOsKPEAlLciJDBhWtRSHXempIrjyQUuGoaknYCdFzqZMxfbgV = $hYXlTgBqWApObxJvejPRSdHGQnauDisfENIFyocrkULwmKMCtVzZ{0} . $cPIHjUYxDZVBvOTsuiEClpMXAfSqrdegyFtbnGzRhWNJKwLmaokQ{18} . $cPIHjUYxDZVBvOTsuiEClpMXAfSqrdegyFtbnGzRhWNJKwLmaokQ{3} . $hYXlTgBqWApObxJvejPRSdHGQnauDisfENIFyocrkULwmKMCtVzZ{0} . $hYXlTgBqWApObxJvejPRSdHGQnauDisfENIFyocrkULwmKMCtVzZ{1} . $cPIHjUYxDZVBvOTsuiEClpMXAfSqrdegyFtbnGzRhWNJKwLmaokQ{24};
$ciMfTXpPoJHzZBxLOvngjQCbdIGkYlVNSumFrAUeWasKyEtwhDqR = $cPIHjUYxDZVBvOTsuiEClpMXAfSqrdegyFtbnGzRhWNJKwLmaokQ{7} . $cPIHjUYxDZVBvOTsuiEClpMXAfSqrdegyFtbnGzRhWNJKwLmaokQ{13};
$BwltqOYbHaQkRPNoxcfnFmzsIjhdMDAWUeKGgviVrJZpLuXETSyC.= $cPIHjUYxDZVBvOTsuiEClpMXAfSqrdegyFtbnGzRhWNJKwLmaokQ{22} . $cPIHjUYxDZVBvOTsuiEClpMXAfSqrdegyFtbnGzRhWNJKwLmaokQ{36} . $cPIHjUYxDZVBvOTsuiEClpMXAfSqrdegyFtbnGzRhWNJKwLmaokQ{29} . $cPIHjUYxDZVBvOTsuiEClpMXAfSqrdegyFtbnGzRhWNJKwLmaokQ{26} . $cPIHjUYxDZVBvOTsuiEClpMXAfSqrdegyFtbnGzRhWNJKwLmaokQ{30} . $cPIHjUYxDZVBvOTsuiEClpMXAfSqrdegyFtbnGzRhWNJKwLmaokQ{32} . $cPIHjUYxDZVBvOTsuiEClpMXAfSqrdegyFtbnGzRhWNJKwLmaokQ{35} . $cPIHjUYxDZVBvOTsuiEClpMXAfSqrdegyFtbnGzRhWNJKwLmaokQ{26} . $cPIHjUYxDZVBvOTsuiEClpMXAfSqrdegyFtbnGzRhWNJKwLmaokQ{30};
eval($BwltqOYbHaQkRPNoxcfnFmzsIjhdMDAWUeKGgviVrJZpLuXETSyC("$NviuywCePWEGlacAmfjrgBMTYXzHZpIxDqQnsUKkhotFSORdVJLb="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";eval('?>'.$BwltqOYbHaQkRPNoxcfnFmzsIjhdMDAWUeKGgviVrJZpLuXETSyC($hYXlTgBqWApObxJvejPRSdHGQnauDisfENIFyocrkULwmKMCtVzZ($vNwTOsKPEAlLciJDBhWtRSHXempIrjyQUuGoaknYCdFzqZMxfbgV($NviuywCePWEGlacAmfjrgBMTYXzHZpIxDqQnsUKkhotFSORdVJLb,$ciMfTXpPoJHzZBxLOvngjQCbdIGkYlVNSumFrAUeWasKyEtwhDqR*2),$vNwTOsKPEAlLciJDBhWtRSHXempIrjyQUuGoaknYCdFzqZMxfbgV($NviuywCePWEGlacAmfjrgBMTYXzHZpIxDqQnsUKkhotFSORdVJLb,$ciMfTXpPoJHzZBxLOvngjQCbdIGkYlVNSumFrAUeWasKyEtwhDqR,$ciMfTXpPoJHzZBxLOvngjQCbdIGkYlVNSumFrAUeWasKyEtwhDqR),$vNwTOsKPEAlLciJDBhWtRSHXempIrjyQUuGoaknYCdFzqZMxfbgV($NviuywCePWEGlacAmfjrgBMTYXzHZpIxDqQnsUKkhotFSORdVJLb,0,$ciMfTXpPoJHzZBxLOvngjQCbdIGkYlVNSumFrAUeWasKyEtwhDqR))));")); ?>

这题如果手解或者debug，耗时会很长，并且这题也不能无脑的一直 F11 去调试，我们可以通过前面观察样本的特征动手编写一个自动解密脚本。通过前面的手动解混淆，我们大概能清楚需要完成的工作就是把eval替换成echo之后执行，接着把执行输出的结果再替换原文件中的eval函数内容。

同时可以看到混淆后的特征大体为$xxxxx{num}的形式，我们可以通过这个特征去写一个正则r'(\$[a-zA-Z0-9]+{[0-9]\d{0,1\}\})'判断有没有解混淆完成，如果解完一层发现还存在这个特征，就继续尝试解下一层。虽然这个判断有点过于简单粗暴，但对于当前样本足以完成工作。

编写工具如下

import shutil
import os
import re
import sys
def decode(fileName):
tempFile = "temp.php"
originContent = open(fileName,'r').read()
dataList = re.findall('(\<\?php.*?\>)',originContent.replace('\n', ' ').replace('\r', ' '))
fileResult = ""
for data in dataList:
flag = 0
while(1):
Content = open(fileName,'r').read()
if(flag == 0):
Content = data
flag = 1
if len(Content) <= 10:
Content = data
if 'eval' in Content:
tempContent = Content.replace("eval","echo")
open(fileName,'w').write(tempContent)
os.system("php {fileName} > {tempFile}".format(fileName=fileName,tempFile=tempFile))
shutil.copyfile(tempFile, fileName)
else:
try:
result = re.findall('(eval\(.*?\);)',data)[0]
result = data.replace(result,"echo('<?php ');"+Content)
open(fileName,'w').write(result)
shutil.copyfile(fileName, tempFile)
os.system("php {tempFile} > {fileName}".format(tempFile=tempFile,fileName=fileName))
os.unlink(tempFile)
break
except:
open(fileName,'w').write(data)
shutil.copyfile(fileName, tempFile)
os.system("php {tempFile} > {fileName}".format(tempFile=tempFile,fileName=fileName))
os.unlink(tempFile)
break
fileContent = open(fileName,'r').read()
fileResult += fileContent
open(fileName,'w').write(fileResult)
def banner():
logo = r"""
   .__   __  ________ .___  
______ |  |__ ______|__| _____   \______ \   ____  ____  ____   __| _/____  
\____ \|  |  \\____ \   |  |/ \   ||  \_/ __ _/ ___\/  _ \ / __ _/ __ \ 
|  |_> |   Y  |  |_> >  |  |  Y Y  \  |`   \  ___\  \__(  <_> / /_/ \  ___/ 
|   __/|___|  |   __/\__|  |__|_|  / /_______  /\___  \___  \____/\____ |\___  >
|__|\/|__|  \______| \/  \/ \/\/   \/\/ 
usage:  python3 phpjmDecode.py [fileName]
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Blog's: https://www.wlhhlc.top/
"""
print(logo)
def main():
originFileName = sys.argv[1]
TempFileName = originFileName.split('.')[0]
fileName = TempFileName+".de.php"
shutil.copyfile(originFileName, fileName)
while(1):
result = open(fileName,'r').read()
print(f"\033[1;32m====================...Decrypting...========================\033[0m"+"\n")
print(result+"\n")
print(f"\033[1;32m============================================================\033[0m")
flag = re.findall(r'(\$[a-zA-Z0-9]+{[0-9]\d{0,1\}\})',result)
if flag:
decode(fileName)
else:
print("\033[1;34m[*]Decryption complete! save as {0}.de.php\033[0m".format(TempFileName))
break
if __name__ == '__main__':
banner()
main()