{"id":2222,"date":"2015-05-10T08:46:50","date_gmt":"2015-05-10T08:46:50","guid":{"rendered":"http:\/\/www.harunadal.com\/wp\/?p=2222"},"modified":"2015-05-10T08:46:50","modified_gmt":"2015-05-10T08:46:50","slug":"bu-rootkit-cok-farkli","status":"publish","type":"post","link":"https:\/\/www.harunadal.com\/wp\/bu-rootkit-cok-farkli\/","title":{"rendered":"Bu rootkit \u00e7ok farkl\u0131!"},"content":{"rendered":"<p class=\"article-desc\"><a href=\"http:\/\/www.harunadal.com\/wp\/wp-content\/uploads\/2015\/05\/rootkit.jpg\"><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter size-full wp-image-2223\" src=\"http:\/\/www.harunadal.com\/wp\/wp-content\/uploads\/2015\/05\/rootkit.jpg\" alt=\"rootkit\" width=\"600\" height=\"450\" srcset=\"https:\/\/www.harunadal.com\/wp\/wp-content\/uploads\/2015\/05\/rootkit.jpg 600w, https:\/\/www.harunadal.com\/wp\/wp-content\/uploads\/2015\/05\/rootkit-300x225.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/a><\/p>\n<p class=\"article-desc\">Ekran kart\u0131n\u0131n i\u015flemcisini ve RAM&#8217;ini kullanan bu zararl\u0131, Linux kullan\u0131c\u0131lar\u0131n\u0131 korkutacak cinsten!<\/p>\n<div id=\"article-info\"><\/div>\n<p><!--more--><\/p>\n<p>&nbsp;<\/p>\n<p>Bir grup geli\u015ftirici, <strong>Linux<\/strong> sistemlerinde i\u015flemci yerine <strong>GPU&#8217;yu<\/strong> kullanarak kendisini gizleyebilen bir rootkit geli\u015ftirdi.<\/p>\n<p>Jellyfish ad\u0131ndaki rootkit, zararl\u0131lar\u0131n yaln\u0131zca GPU \u00fczerinde \u00e7al\u0131\u015ft\u0131r\u0131labildi\u011fini ispatlamay\u0131 ama\u00e7l\u0131yor. Grafik kartlar\u0131, kendi i\u015flemcilerine ve <strong>RAM&#8217;lerine<\/strong> sahip oldu\u011fundan, bu t\u00fcr zararl\u0131lar\u0131 yakalamak, geleneksel zararl\u0131lara g\u00f6re daha zor oluyor. Jellyfish&#8217;in geli\u015ftiricilerine g\u00f6re GPU zararl\u0131lar\u0131n\u0131 analiz edecek herhangi bir <strong>ara\u00e7\u00a0<\/strong>bulunmuyor.<\/p>\n<p>Dahas\u0131 bu t\u00fcr rootkit&#8217;ler, DMA (direkt bellek eri\u015fimi) yoluyla bulunduklar\u0131 bilgisayar\u0131n ana belle\u011fine, i\u015flemciye u\u011framadan direk olarak eri\u015febiliyorlar. Bu t\u00fcr etkinlikleri yakalamak ise di\u011fer zararl\u0131lara k\u0131yasla daha g\u00fc\u00e7. Bunun yan\u0131nda geli\u015ftiricilere g\u00f6re GPU zararl\u0131lar\u0131, sistem kapat\u0131ld\u0131\u011f\u0131nda bile GPU belle\u011finde kalabiliyorlar.<\/p>\n<p>Jellyfish, \u015fu an <strong>AMD<\/strong> ve <strong>Nvidia<\/strong> ekran kartlar\u0131nda \u00e7al\u0131\u015f\u0131yor. Intel kartlar\u0131 ise AMD APP SDK yoluyla desteklenmekte. GPU&#8217;lar, belirli i\u015flemlerde normal i\u015flemcilere g\u00f6re daha h\u0131zl\u0131 olduklar\u0131ndan, ondan yararlanan baz\u0131 zararl\u0131lar var. Ancak \u015fimdiye kadarki zararl\u0131lar, Jellyfish gibi tamamen GPU \u00fczerinde \u00e7al\u0131\u015fm\u0131yor, her iki i\u015fiemciyi birden kullan\u0131yorlard\u0131.<\/p>\n<p>Zararl\u0131n\u0131n geli\u015ftiricileri, onun halen geli\u015ftirilme a\u015famas\u0131nda oldu\u011funu, kodun yaln\u0131zca e\u011fitim ama\u00e7l\u0131 sunuldu\u011funu s\u00f6yl\u00fcyorlar. Konsept a\u015famas\u0131nda oldu\u011fundan, \u015fimdilik GPU zararl\u0131lar\u0131ndan korkmam\u0131z i\u00e7in bir neden yok gibi g\u00f6r\u00fcn\u00fcyor.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ekran kart\u0131n\u0131n i\u015flemcisini ve RAM&#8217;ini kullanan bu zararl\u0131, Linux kullan\u0131c\u0131lar\u0131n\u0131 korkutacak cinsten!<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8,436],"tags":[609,607,610,608],"class_list":{"0":"post-2222","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-guvenlik","7":"category-ust","8":"tag-dma","9":"tag-gpu","10":"tag-jellyfish","11":"tag-rootkit"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Bu rootkit \u00e7ok farkl\u0131!<\/title>\n<meta name=\"description\" content=\"Ekran kart\u0131n\u0131n i\u015flemcisini ve RAM&#039;ini kullanan rootkit, Linux kullan\u0131c\u0131lar\u0131n\u0131 korkutacak cinsten! 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