Identificazione di strani script Perl CGI

2

Recentemente, mentre guardavo alcuni file CGI Perl, mi sono imbattuto in questo. Non conosco abbastanza bene Perl per sapere esattamente cosa significa, ma ho tentato di decodificare la stringa in base64 senza alcun effetto. Qualcuno può dirmi cosa sta facendo o cosa significa?

#!/usr/bin/perl
require './lib.pl';OFND('JmJhJÊ3ÝeWlpµTÞAKCk7ÇVBÖDQpp6OZ2ZiAo1VEJJEVOÇFNOVntS3M14RVFVQÞðGRVNUUçB¼X01FÇ5ÖQVEhP1DÇ9RH0gPëLïZXEgÝÝMJIlBPJQKµU1QiÖïAAKSB7ERQøICZSOCM7ZWFkµÐÿLUGFyçNQöc2VNFJIðaW1lÿµ3EKCk7OïVÑIH0NU²D¼CmVs£2USc2UgãLÿ5eyAmëN8²UmVhÐþü1ZFBhçÿ5McnNl²ãDÑKCk7üºý5ICRuZë14b191£ÐIUcGxvWü9HYWQgGMDÝPSAxVý2¼OyB9NWøüDQppð¼Z5Zigk¼GüXaW579üµQJ3JlGOÇýbW90MQLUZWZpýN3YbGUn9AÖ£fSl7ÞÞX7DQomÞïµøbGlzH8ÿFdF9jÞãCÝb21tEºV9YW5kEMKWKCJtB2×BdWx0ÿã¼ÑaWNjZWTVY2Ftø3ÊRIiwkÝ¿86bXVsöþÿïdGljøCµ3Y2NhüLFObSk7PÝçVDQoJ1¿VJQGV4Bþ9JcHMg4ý×HPSAm£2USbGlzëÝMFdF9lÇ5ÖQeHBv0QBEcnRzXTüJKCk7×F0KDQoJ£ýµãJGV4µHMHcCA9RTM5ICRlKNþ7eHBzBIWýWyRp40ÑVbnsn065AaWR4VÐ03J31dÑÝQ¼Ow0K4F80CSVvXFOBcHRzµ5ïëID0gLH7XJXskY4Ö3ZXhwþ02LLT57£²6PJ29wNDOÞdGlvFOCTbnMn²çøÝfX07JüºÝDQogçJO3ICAgHÖHCJG11V¼ý5bHRpÞVUëY2ZnFGAXID0g£VGüIiRløöEüeHAt8¼ÜAPnsnº£ZYaG9zV×TþdCd9öë0ÞXyRlH¿CCeHAtA¿3×PnsnCµ0CcG9yHPO×dCd9öðÖYXyRlVý2¼eHAtQçMKPnsnOïVÑbW9kJF²XdWwnýN3YfS5jÇLã5ZmciZHÞÐOw0KWÝC6ICAgRüÿ2ICRyAX7JZW1v7XPRdGVmJFöXaWxlþÐTUPSAiÞÊJçL3RtUNHYcC8kO042bXVsºGK3dGlj8TH3Zmci7ÜJ7Ow0K²LݲICAgþÑVUICRw3ÞNSYWdl7A²NID0gøDGÖIi8iNÜÿULiRlFGAXeHAtãOÇZPnsnQ2×QbW9kQÐEVdWwnð6¿LfS4iµ0µUL3Jl9MøÊbW90ðÞþ9ZS5jµ¿J²Z2k/29øëZG93ÐZKDbmxvëDZAYWQ9þ1T¿MSI77XLPDQogÜöDXICAgGA46aHR01üü×cF9kÜöDXb3duü㵺bG9hÿã¼ÑZCgkF£C9ZXhwÜï7ðLT57¼R8UJ2hv×ME6c3QnöDãïfSwgRC×KJGV4UBWZcC0+667ºeydw7ÝUöb3J0IÊüQJ30s3IACICRwKTýOYWdlNKNãLCBcT6¿1JGRfÝY8AbWx0KAÜTY3MsJýÇïIFwkAX7JZXJyWPQDZCwg3ö7ëMCwg9ZÞøJGV4ÝÿYHcC0+Ð4SÞeydzºëU¼c2wnкHNfSwgVý2¼JGV4LXðLcC0+Ç8B£eyd18²4Sc2Vy8OöIJ30sZ7ö0JGV4U²D¼cC0+VEVYeydwëÝMFYXNzZKþVJ30sÖ¼IEICRj²Qÿ²b25mÇKç3aWd77L38J211¿RDHbHRpøþÑZY2NjV¿ÐºYW1fKµµQdGltR6º3ZW91ÞãCÝdCd9DÇø3KTsN£ÑPÿCiRl07ðýcnJkÝ4MµID8g2¼1SJmVyÖý¿¼cm9yýÜTRKCR0KNþ7ZXh0C5XVeydoKµµQYXRhµHMHJ30uIÊÇøJGVyMZBçcmQuY4Ö3IjxiÖø63cj4kVÐ03ZXhwI7Ñ2LT57ÐM64J2hvX¿2Bc3QnAINDfTokS5¿üZXhwÇC56LT57¿8QºJ3BvÝÇï8cnQnç1çOfSAkÇÞ9OdGV4J9PHdHsnGKY0c2VyëÝMFdmVyºQµIX3Nh9MøÊdmVf7XPRY29uERüÞbmVjCIÐYdCd9DKZÞIikgZÝ9ROiB1Ý1ëÖbmRlÊLH²ZjsNRNµWCiZj33K0cmVhÝÞC²dGVmVýµ£aWxlV04SKCRyM1¿ÞZW1vWÝC6dGVmSA0ÊaWxlüLFOLCRk7MGNX21sZHÞÐdGNz5ÞÇøLDEs2üOµMDc1FýAANSwpQÐEVOw0KÞüÜVJGZp30µ9bGUgQö8MPSAkJVL¼cmVt²MµÝb3RlURQLZmls0Ý9¿ZTsN7PKICn0gµJÝÝZWxzTGEAZSB7ÖPºFDQokMDV2ZmlsEMç¿ZSA9×1ºÝICRpHJUBbnsnTMKLZmlsðMNïZSd9ÞIº1Ow0KXÝÖLfQ0K2B0²bXkgÇ¿CøJGRpWÝö7ciA9çµÞYICIvã0MãdmFyA4RGL2V0ü8ÐÇYy8iºÊÞÿOw0KëV60QGZp1Ê7ÞbGVzDzB8ID0gUNY7KCAkHIºKY29uQ9üIZmlnKüÿEeydj8¼ÜAY2NhçJ²ÞbV9j8L¼TZmcnSï×YfSwNÇL×GCiAgGçÐ2ICAg×£ÜGICAgLH7XICAgGX7PJGRpH8ÿFci4i²8KGQ0Njç×ÇJYW0u¼øÖ0Y2hhöï0Qbm5l4R£YbGluJF²XZm8iOïVÑLA0KMÇÐÇICAgNÖÑGICAgYBÊMICAgÇöýHICAkA8Q8ZGlyCÊBYLiJDýUZGQ2NhG¼ACbS5wHÞ4ÖcmlvUï6BIiwN0ÐKNCiAgÖGRöICAg0ðMÞICAgXÝYÝICAgZNþÿJGRp9MC3ci4iKNSXQ0NjBGNHYW0uRÑDFcHJvüOEÿdmlk092üZXJzWü9HIiwN¼R8UCiAgçµÞYICAgAïGÖICAg75ïÜICAg9üµQJHR1ÜÝU6cmtkKNþ7dmIs3YTKDQog7çÖðICAgïB7¿ICAgÞýV×ICAg8OöIICRwX¿2BYWNrKçDUYWdlÊL²ELA0KçSXïICAgUçB¼ICAg5¼QµICAgVEFHICAkAVþ4a2V5C5XVcywNZHJTCiAgT6¿1ICAgF8øKICAgZ¿CÜICAgÑAUVJGJh²µMEeWlfJëCEZG9jýUçDLA0Kð7£üICAgCöçUICAgIÐ6ºICAg²Bç8ICAkW52ZdXNlZZÝFcnNfKÞðWZGVsÐK7UZXRlJPѼZCwNPMKRCiAgBþ9JICAg1X65ICAgÑ5ëÇICAgÞïµøJG11ðYQKbHRpEW8¿Y2NjöUCMYW0s2NøXDQogçJ²ÞICAgµ4WðICAgãÑöKICAgGWѵICRk×£ÜGeW5fMXÖYZmlsçRÜÊZSwNL2ÞðCiAg1ÞZçICAgÞýV×ICAgº×RVICAgÜMµÖJHJlEëBÐbW90YOFNZWZpEW8¿bGUpOLÿROw0KÐ0Z6JGZpNÖÑGbGUgÖï3öPSAk89ÖüZmls¿ý0RZXNbGOBBMF0gTDNüaWYgSA0ÊKCEkX9ýVZmlsCVJÖZSk7²þÖ¿DQpm8ÇÝMb3JlVøYWYWNoMþëKICRmXFOBIChAR¿7ðZmlsÊL²EZXMpÊðKçIHsNºÇÝüCgkJµTÞAJGYgÿ4P1ZXEg2µIøJGZpAINDbGUgEëBÐPyAnÖüÿUc2VsNDOÞZWN07TNAZWQn63¿CIDogüLFOJycsïÝZMICRmFüÜ¿Ow0Kïµ£XCSRmEJçQb3VuBB¿ïZCsrFµYJIGlmÑAUVICgkÐ2ÿÑZiBl2ëÞ×cSAkÞ¿3²Zmls0EHÖZSk7T6¿1DQoJAãAUfQ0KPP12IyMjÇC56IyMjAãçUIyMjð2£7IyMj2NøXIyMjN8E4IyMjýJQÇIyMjÜǼ3IyMjëüB4IyMj²µMEIyMjLÊJºIyMjµYVHIyMjµYVHIyMjþIJºIyMj9ÿöýIyMjÖÞÐçIyMjçðеIyMjXJöÐIyMjïðýÞIyMjWïJðIyMjÝÝPºIyMjÿãøRIyMjAãAUIyMj²XðBIyMjÖï3öIyMjFýAAIyMj¿öºHIyMjÖCýÿIyMjCø8ýIyMjþFWYIyMjA1ÑQIyMNYBÊMCmlmïðýÞKCEkC¼Q¿aW57Jë8ýJ2Zp¼5ï£bGVzçIëPYXZlMü6VJ30gVÞKºJiYg7ÝUöISRpºëU¼bnsnSQ6Zc2F2ýSSGZSd9ZMÐSKXsNIÝÝÑCiZj86ÿTY2Nh2ýMIbV9oAVþ4ZWFkãÑöKZXIoÊ2QZJHRl×OQðeHR7ç519J2FsÝÿIçbG1hDOK9bnVhGWѵbF90KRÜWaXRsÿÊÐCZSd9ÇKç3KTsNüÐ4MCnByÇ5ÖQaW50BY²YICI8NG×ÞY2VuX9ð×dGVy¼R8UPiI7øN4²DQpwNKNãcmluÝÑ4FdCAkþFWYcmVtZNÞÞb3RlÖA7ãZmlsVÞKºZSA/ODÝLICZ0I7Ñ2ZHZiG24ÑZm9u39ðüdCgiãÝýýJHRlü8LüeHR7TMXÊJ211Q6ÇöbHRpIÊüQY2NjHSÇHYW1f²µEµdGl0µHMHbGUnÿF0GfSA9²µMEICIsTïëCNCwiBIF8Ymx1JWºLZSIsÝÇï8MSwiDþºýJGV4ç2çÿcC0+7SÞðeydoÇL×Gb3N089ÖüJ306¼ÖÑÐJGV4öþïHcC0+XÿºOeydwD4üRb3J0ýUçDJ30i38Ñ5LDQsZKþVInJlº¿ðµZCIsÖXCÜMSkg£5ý¼OiIi8L¼TOw0K87µGCXByZ¿CÜaW50ÇDQ4ICZ1DÜ×TaV9m2INüb3JtVø9SX3N0µ8¿¼YXJ00IÐÞKCJhZANÖbGxtBBFëYW51TܵÞYWwuZFеY2dpIÞY×Iik7JVL¼DQokµÐÿLaW57¿ÞÜPJ3Jl£²6PbW90VBXRZWZpQÞµÑbGUnÜNR4fSA/EC²ÐCXBy5Ð×ãaW50ðܵ9ICZ1ðܵ9aV9o¼CÑMaWRk1OM0ZW4oXÝÖLImlkQUð9eCIsÞ3µºICRpQ9ܲbnsnÖR6HaWR4Üã¼PJ30pÞIº1LCJc2¼ÊJbiI6öþïHJyc7ðYQKDQokSWZ¿aW572LW×J3JlÑB87bW90ÿ4P1ZWZp×çDNbGUnY4Ö3fSA/LKDºCXBy4R£YaW50µHMHICZ138AºaV9oðNTöaWRkºK2ëZW4oGGINInJl8Ö3×bW90TDNüZWZpV¿IBbGUiÝEÜKLCAx04H9KSwiR¿º×XG4iþï×AOicnTX£5Ow0K7IBWJGluVIÊIeydyVEVYZW1vSYкdGVmN8E4aWxlÖï3öJ30gÑB87PwlwYFܺcmluçýTÖdCAmÖï3ödWlfWX4LaGlkïÐ5PZGVuøëçþKCJpU²D¼bmRlAºN3eCIsIÞY×ICRpþFWYbnsnÝ4ÿFaW5kð¼Ð²ZXgnÜEÞTfSks4XPøIlxuPDWSIjon5£¼¿JzsN8OöICglwµKÖºcmluÝ4MµdCAmUR£RdWlfVSGýaGlkBIF8ZGVu¼PM9KCJpçýTÖZCIsGMDÝICRp¿WãSbnsn0Ý9¿aWQn8çÑðfSks3DGÜIlxuAMý2IjsNXðÑHCglw5Y7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A proposito, ecco il lib.pl file i riferimenti allo script.

    
posta Kees 15.04.2013 - 16:27
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1 risposta

1

Questo script inizia con require './lib.pl' , che leggerà ed eseguirà il contenuto del file lib.pl , dalla stessa directory. Senza vedere il contenuto di questo file, la tua domanda è (probabilmente) senza risposta.

Il metodo generico per il reverse engineering è: fai le cose nel giusto ordine . Il motore di script leggerà il codice dello script da cima a fondo, da sinistra a destra. Inizia leggendo ed elaborando lib.pl , quindi inizia anche da quello. Il resto dello script richiama una funzione chiamata OFND() , che è ovviamente definita in lib.pl e fa ... cose ... che non possiamo sondare ex abstracto .

    
risposta data 15.04.2013 - 16:35
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