{"id":5424,"date":"2021-10-10T17:53:00","date_gmt":"2021-10-10T14:53:00","guid":{"rendered":"https:\/\/www.niobehosting.com\/blog\/?p=5424"},"modified":"2021-10-10T15:57:00","modified_gmt":"2021-10-10T12:57:00","slug":"siber-saldiri-nedir","status":"publish","type":"post","link":"https:\/\/www.niobehosting.com\/blog\/siber-saldiri-nedir\/","title":{"rendered":"Siber Sald\u0131r\u0131 Nedir?"},"content":{"rendered":"\n<p>\u0130nsanlar internette sanal, <strong>siber <\/strong>(Cyber) olarak olu\u015fturulmu\u015f bir ortamda birbirleriyle etkile\u015fiyor veya kolayl\u0131k sa\u011flayan baz\u0131 ki\u015fisel i\u015flemleri ger\u00e7ekle\u015ftiriyor. G\u00fcn\u00fcm\u00fczde resmi veya gayri resmi bir\u00e7ok ki\u015fisel i\u015flemi ger\u00e7ekle\u015ftirmek i\u00e7in internet ortam\u0131 h\u0131z ve kolayl\u0131k sa\u011fl\u0131yor. Tabi k\u00f6t\u00fc niyetli ki\u015filer de bu kolayl\u0131\u011f\u0131 kullanmak isteyen insanlar\u0131n bilgilerini k\u00f6t\u00fc ama\u00e7larla kullanmak istiyorlar.&nbsp;<strong>Siber sald\u0131r\u0131<\/strong>, baz\u0131 elektronik cihazlar, k\u00f6t\u00fcc\u00fcl yaz\u0131l\u0131mlar ve baz\u0131 sistem a\u00e7\u0131klar\u0131n\u0131 kullanarak&nbsp; internet ortam\u0131nda ki\u015filere ait \u00f6nemli bilgilerin (kredi kart\u0131, mahrem veriler) \u00e7al\u0131nmas\u0131, dijital varl\u0131klar\u0131n k\u00f6t\u00fcc\u00fcl niyetlerle manip\u00fcle edilmesi, kopyalanmas\u0131 s\u00fcregelen sistemin engellenmesi i\u00e7in yap\u0131lan eylemlerdir. Bu i\u015fleri <strong>hacker <\/strong>denen ki\u015filer ger\u00e7ekle\u015ftirmektedir.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Siber Sald\u0131r\u0131 T\u00fcrleri<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">DDoS (Distributed Denial of Service)<\/h3>\n\n\n\n<p><strong>DDoS<\/strong> (<strong>D<\/strong>istributed <strong>D<\/strong>enial of <strong>S<\/strong>ervice) Da\u011f\u0131t\u0131k Hizmet Reddi olarak da isimlendirilen bu sald\u0131r\u0131 t\u00fcr\u00fcnde ama\u00e7 web sitelerinin hizmet vermesini engellemektir. Bunu da sistemdeki baz\u0131 a\u00e7\u0131klar\u0131 kullanarak ger\u00e7ekle\u015ftirirler. \u00d6ncelikle \u00e7ok say\u0131da bilgisayar ele ge\u00e7irilir ve \u201c<strong>Botnet<\/strong>\u201d denilen ve kontrol\u00fc ele al\u0131nan \u00e7ok say\u0131da zombi bilgisayar\u0131n ayn\u0131 anda bir web sitesine \u201c<strong>Request<\/strong>\u201d istek yollamas\u0131 sa\u011flan\u0131r. Bir web sitesinin bulundu\u011fu sunucunun ayn\u0131 anda i\u015fleyebilece\u011fi istek say\u0131s\u0131 k\u0131s\u0131tl\u0131 oldu\u011fu i\u00e7in bir s\u00fcre sonra<strong> \u201cResponse\u201d<\/strong> yani cevap veremez hale gelir ve sunucu (server) \u00e7\u00f6ker.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Phishing (Oltalama)<\/h3>\n\n\n\n<p>Phishing (oltalama) metodunda hackerlar, kendi olu\u015fturduklar\u0131 ve ger\u00e7e\u011fine \u00e7ok benzeyen sahte web sitelerine girmenizi sa\u011flarlar ve oraya girece\u011finiz bilgileri \u00e7alarak sizi doland\u0131r\u0131rlar. Genelde bankac\u0131l\u0131k ve finans sistemleri kullan\u0131larak ger\u00e7ekle\u015ftirilir ve kredi kart\u0131 limitlerinizi kullan\u0131larak harcamalar yap\u0131l\u0131r. Sosyal medyada \u201c<strong>10 y\u0131l geriye d\u00f6n\u00fck kredi kart\u0131 aidat\u0131 iadesi i\u00e7in t\u0131klay\u0131n\u201d<\/strong> gibi baz\u0131 cazip teklifler i\u00e7eren linkler olu\u015fturulur ve insanlar bu linkler ile sahte web sitelerine y\u00f6nlendirilirler.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Malware<\/h3>\n\n\n\n<p>K\u00f6t\u00fc niyetli kullan\u0131lan t\u00fcm yaz\u0131l\u0131mlara malware denir ve \u00e7e\u015fitleri vard\u0131r. bu yaz\u0131l\u0131mlardan vir\u00fcsler genelde bilgisayarlara zarar vermeye y\u00f6nelik olu\u015fturulur. Trojan (Truva at\u0131) ad\u0131 verilen k\u00f6t\u00fc yaz\u0131l\u0131mlar ise bilgisayar\u0131n\u0131za uzaktan m\u00fcdahale etmek i\u00e7in kullan\u0131l\u0131r. Uzaktan kontrol edilen bilgisayar\u0131n\u0131z h\u0131rs\u0131zl\u0131k, \u015fantaj veya di\u011fer k\u00f6t\u00fc ama\u00e7larla kullan\u0131l\u0131r.&nbsp;<\/p>\n\n\n\n<p>Keylogger denilen yaz\u0131l\u0131mlar ise klavyede yapt\u0131\u011f\u0131n\u0131z hareketleri izler ve \u00f6rne\u011fin \u015fifrelerinizin \u00e7al\u0131nmas\u0131n\u0131 sa\u011flar. Banka hesaplar\u0131n\u0131za ait bu bilgiler sayesinde paran\u0131z\u0131 \u00e7alabilirler.<\/p>\n\n\n\n<p>G\u00fcn\u00fcm\u00fczde en \u00e7ok kullan\u0131lan vir\u00fcsler aras\u0131nda ransomware denilen fidye yaz\u0131l\u0131mlar\u0131 vard\u0131r. Sisteminize sokulan program sabit diskinizdeki t\u00fcm verileri \u015fifreler ve kullan\u0131lamaz hale getirir, e\u011fer kaybetmek istemedi\u011finiz \u00f6nemli veriler varsa \u015fifrelerin kald\u0131r\u0131lmas\u0131 i\u00e7in o ki\u015filere bitcoin yollaman\u0131z gerekir.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Man In The Middle (Ortadaki Adam)<\/h3>\n\n\n\n<p><strong>MITM<\/strong> (<strong>M<\/strong>an <strong>I<\/strong>n <strong>T<\/strong>he <strong>M<\/strong>iddle) ortadaki adam sald\u0131r\u0131s\u0131 kablosuz a\u011f ba\u011flant\u0131lar\u0131nda kullan\u0131lan bir sald\u0131r\u0131 y\u00f6ntemidir. Bu y\u00f6ntemde ama\u00e7 ki\u015fisel verileri \u00e7almak i\u00e7in dinleme yapmakt\u0131r. Bunu da kablosuz a\u011f modemini hackleyerek yaparlar.&nbsp;<\/p>\n\n\n\n<p>\u00d6zellikle cafeler gibi genel kullan\u0131ma a\u00e7\u0131k kablosuz a\u011flar bu y\u00f6ntem i\u00e7in bi\u00e7ilmi\u015f kaftand\u0131r. Kullan\u0131lan \u00f6zel yaz\u0131l\u0131mlar ile yap\u0131lan bu sald\u0131r\u0131da modemle sizin aran\u0131za giren bu k\u00f6t\u00fc niyetli kullan\u0131c\u0131 \u00fczerinden internete ba\u011flan\u0131rs\u0131n\u0131z. T\u00fcm internet ak\u0131\u015f\u0131 o ki\u015fi \u00fczerinden ge\u00e7ti\u011fi i\u00e7in ziyaret etti\u011finiz web siteleri ve varsa \u015fifreleriniz o ki\u015finin eline ge\u00e7er. Modemle sizin aran\u0131za girdi\u011fi i\u00e7in ortadaki adam olarak isimlendirilmi\u015ftir.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Cryptojacking<\/h3>\n\n\n\n<p>DDoS sald\u0131r\u0131s\u0131nda bahsedildi\u011fi gibi botnet denilen bir bilgisayar a\u011f\u0131 vard\u0131r. Siz farketmemi\u015f olabilirsiniz ancak bu a\u011fa sizin bilgisayar\u0131n\u0131z da dahil olmu\u015f olabilir. Bilgisayar\u0131n\u0131za y\u00fcklenmi\u015f k\u00fc\u00e7\u00fck bir <strong>exploit (s\u00f6m\u00fcr\u00fc)<\/strong> yaz\u0131l\u0131m\u0131 sayesinde siz farketmeden bilgisayar\u0131n\u0131z o ki\u015finin kullan\u0131m\u0131na ge\u00e7er. Genelde bu tarz bilgisayar a\u011f\u0131 sayesinde kripto (Bitcoin) benzeri para madencili\u011fi yap\u0131l\u0131r. \u00c7ok say\u0131da bilgisayar \u00fczerinde k\u00fc\u00e7\u00fck k\u00fc\u00e7\u00fck yap\u0131lan kripto para madencili\u011fi bu ki\u015filerin b\u00fcy\u00fck gelirler elde etmesine yard\u0131mc\u0131 olur.&nbsp;<\/p>\n\n\n\n<p>Bilgisayar\u0131n\u0131z yava\u015f \u00e7al\u0131\u015f\u0131yorsa, \u00e7ok \u0131s\u0131n\u0131yorsa, siz i\u015flem yapmazken bile y\u00fcksek fan h\u0131z\u0131 varsa hackerlar b\u00f6yle bir program ile bilgisayar\u0131n\u0131z\u0131 s\u00f6m\u00fcr\u00fcyor olabilir.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">SQL Enjeksiyonu<\/h3>\n\n\n\n<p>\u0130nternet siteleri bir\u00e7ok bilginin kaydedildi\u011fi mecralard\u0131r. Bu alanlardaki bir\u00e7ok bilgi veritabanlar\u0131nda kaydedilir. Veritaban\u0131na (database) <strong>SQL<\/strong> (<strong>S<\/strong>tructured <strong>Q<\/strong>uery <strong>L<\/strong>anguage) komutlar\u0131 yard\u0131m\u0131 ile yap\u0131lan sorgular ve i\u015flemler sayesinde kullan\u0131c\u0131lar web sitelerinde hesap olu\u015fturur veya hesab\u0131na eri\u015fir.&nbsp;<\/p>\n\n\n\n<p>Bu i\u015flemler arka planda ger\u00e7ekle\u015fir ancak web sitesi iyi planlanmam\u0131\u015f ve bu SQL sorgular\u0131 iyi s\u00fcz\u00fclerek g\u00fcvenlik katmanlar\u0131 olu\u015fturulmam\u0131\u015f ise kullan\u0131c\u0131 ad\u0131 ve \u015fifre girilen formlara girilecek kodlar sayesinde veritaban\u0131na kolayca ula\u015f\u0131l\u0131r ve orada saklanan veriler \u00e7al\u0131nabilir.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Sosyal M\u00fchendislik<\/h3>\n\n\n\n<p>Sosyal m\u00fchendislik hedef g\u00f6zetilen sald\u0131r\u0131lara verilen isimdir. Hackerlar bilgi veya paras\u0131n\u0131 \u00e7almak istedikleri ki\u015finin sosyal medya hesaplar\u0131n\u0131, kimlerle g\u00f6r\u00fc\u015f\u00fcp, kimlerle mail yaz\u0131\u015fmas\u0131 yapt\u0131\u011f\u0131n\u0131 ara\u015ft\u0131r\u0131r. Bu ara\u015ft\u0131rmay\u0131 yapabilmeyi sa\u011flayan \u201c<strong>Maltego<\/strong>\u201d gibi baz\u0131 \u00f6zel yaz\u0131l\u0131mlar vard\u0131r. Bu programlar sayesinde ki\u015finin sosyal medya hesaplar\u0131 ve mailleri tespit edilir, sonras\u0131nda \u015f\u00fcphelenmeyece\u011fi ki\u015filerden gelmi\u015f gibi g\u00f6r\u00fcnen sahte maillerdeki linklere t\u0131klamas\u0131 sa\u011flan\u0131r. Ki\u015fi kendisine gelen linke t\u0131klay\u0131nca bilgisayar\u0131na bir k\u00f6t\u00fcc\u00fcl yaz\u0131l\u0131m y\u00fcklenir ve bu sayede ki\u015finin bilgileri \u00e7al\u0131n\u0131r veya doland\u0131r\u0131c\u0131l\u0131k yap\u0131l\u0131r. Bu konuda yaz\u0131lm\u0131\u015f Kevin Mitnick adl\u0131 yazara ait \u201c<a href=\"https:\/\/www.dr.com.tr\/Kitap\/Aldatma-Sanati\/Egitim-Basvuru\/Bilgisayar\/urunno=0000000181325\">Aldatma Sanat\u0131<\/a>\u201d adl\u0131 kitab\u0131 okuman\u0131z\u0131 \u00f6neririz.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Password Attack<\/h3>\n\n\n\n<p>Kullan\u0131c\u0131lar\u0131n \u015fifrelerini tespit etmeye y\u00f6nelik yap\u0131lan sald\u0131r\u0131lard\u0131r. Bu i\u015flem bir program vas\u0131tas\u0131yla yap\u0131lan tahmin y\u00f6ntemi veya farkl\u0131 y\u00f6ntemler kullanarak ger\u00e7ekle\u015ftirirler. Wordlist denilen baz\u0131 \u015fifre geli\u015ftirme listeleri olu\u015fturulur ve sistemi dinleyen ki\u015fi \u015fifrenizin kabul edildi\u011fi (handshake) oldu\u011fu esnada girilen karakterleri bu listelerle kar\u015f\u0131la\u015ft\u0131rarak bulmaya \u00e7al\u0131\u015f\u0131rlar.&nbsp;<\/p>\n\n\n\n<p>Kullan\u0131c\u0131lar genelde unutmak istemedikleri i\u00e7in kendilerince kolay \u015fifreler olu\u015fturmaya \u00e7al\u0131\u015f\u0131rlar. K\u00f6t\u00fc niyetli ki\u015filerin ilk deneyece\u011fi \u015fifreler bu tarz \u015fifreler olacakt\u0131r. M\u00fcmk\u00fcn olan en zor kombinasyonu olu\u015fturman\u0131n yolu, b\u00fcy\u00fck, k\u00fc\u00e7\u00fck harf ile rakam ve \u00f6zel karakter kombinasyonlu \u015fifrelerdir. En \u00e7ok kullan\u0131lan \u015fifreler ise;<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>123456<\/li><li>123456789<\/li><li>qwerty<\/li><li>password<\/li><li>11111111<\/li><li>12345678<\/li><li>abc123<\/li><li>1234567<\/li><li>password1<\/li><li>00000000<\/li><li>123123<\/li><li>1q2w3e4r5t<\/li><\/ul>\n\n\n\n<p>\u015feklinde olmaktad\u0131r.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Birthday Attack<\/h3>\n\n\n\n<p>Bu sald\u0131r\u0131, olas\u0131l\u0131k hesaplar\u0131n\u0131n irdelendi\u011fi Do\u011fum g\u00fcn\u00fc problemi denilen bir matematiksel kuram \u00fczerinden ger\u00e7ekle\u015ftirilir. \u015eifreler dijital ortamda MD5, SHA256, SHA512 gibi algoritmalarla \u00e7ok farkl\u0131 karakterlere \u00e7evrilerek saklan\u0131r. Bu sald\u0131r\u0131 metodu olas\u0131l\u0131k teorileri ile olu\u015fturulan bir dizi matematiksel hesaplamalarla \u00f6zellikle dijital imzalar\u0131n \u00e7al\u0131nmas\u0131nda kullan\u0131l\u0131r. Dijital imzalar\u0131 hedef alan bu sald\u0131r\u0131 tipinde g\u00fcvende olmak istiyorsan\u0131z size verilen metinlerde ufak de\u011fi\u015fiklikler yaparak sisteme giri\u015f yap\u0131n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Siber Sald\u0131r\u0131 Ama\u00e7lar\u0131<\/h2>\n\n\n\n<p>Siber sald\u0131r\u0131y\u0131 ger\u00e7ekle\u015ftiren ki\u015filer \u00e7e\u015fitli ama\u00e7lara istinaden bu eylemi ger\u00e7ekle\u015ftirir. \u00c7o\u011fu zaman k\u00f6t\u00fc ama\u00e7larla ger\u00e7ekle\u015ftirilen bu eylemler \u00e7o\u011funlukla maddi \u00e7\u0131kar elde etmek i\u00e7in kullan\u0131lmaktad\u0131r.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Fidye Elde Etmek<\/h3>\n\n\n\n<p>Verilerinizi \u015fifreleyen ki\u015filer, verilerin \u00f6nemine g\u00f6re de\u011fi\u015fik miktarlarda kripto para (bitcoin) isterler. E\u011fer bu paray\u0131 \u00f6demezseniz, \u015fifrelemeyi kald\u0131rmazlar ve bilgilerinizi kaybedersiniz.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Hizmet Engellemek<\/h3>\n\n\n\n<p>DDoS sald\u0131r\u0131lar\u0131 genelde bu kapsamdad\u0131r ve web sitelerinin hizmet vermesini engelleyerek ki\u015filerin zarara u\u011framas\u0131n\u0131 sa\u011flamaya \u00e7al\u0131\u015f\u0131r. \u00d6rne\u011fin al\u0131m sat\u0131m yap\u0131lan bir e-ticaret sitesinin 1 saat kapanmas\u0131 her bir dakikada yap\u0131lan sat\u0131\u015f i\u015flemi kadar ciro kayb\u0131na yol a\u00e7ar. Bu kay\u0131p o e-ticaret sitesinin prestij kaybetmesine de yol a\u00e7abilir.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Bilgi Elde Etmek&nbsp;Verilerin \u00c7al\u0131nmas\u0131 ve Doland\u0131r\u0131c\u0131l\u0131k<\/h3>\n\n\n\n<p>Ki\u015fisel veriler bir\u00e7ok ama\u00e7la kullan\u0131labilir. Kredi kart\u0131 verileri, sosyal medya hesaplar\u0131, \u015fahsi bilgiler, ticari bilgiler veya bir web sitesinde kay\u0131tl\u0131 kullan\u0131c\u0131 bilgileri \u00e7\u0131kar elde etmek i\u00e7in \u00e7al\u0131nabilir. En iyi ihtimalle reklam \u015firketlerine sat\u0131lan bu bilgiler sayesinde hi\u00e7 bilmedi\u011finiz firmalardan reklam mesajlar\u0131 veya mailleri al\u0131rs\u0131n\u0131z.<\/p>\n\n\n\n<p>Ayr\u0131ca hesap a\u00e7mak i\u00e7in kulland\u0131\u011f\u0131n\u0131z mail adresi ve \u015fifreleriniz bankac\u0131l\u0131k sistemlerinde denenerek banka hesaplar\u0131n\u0131za ula\u015fmaya \u00e7al\u0131\u015f\u0131l\u0131r. Yine \u00fclkeler aras\u0131nda casusluk ama\u00e7l\u0131 veri \u00e7almak i\u00e7in siber sald\u0131r\u0131 y\u00f6ntemleri yap\u0131l\u0131r.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Pentest (Penentrasyon Testi) ve E\u011fitim<\/h3>\n\n\n\n<p>K\u00f6t\u00fc niyetli ki\u015filer sadece yapabiliyor oldu\u011fu i\u00e7in sebepsiz yere bir kurban se\u00e7ip ona zarar verecek eylemlerde bulunmaya \u00e7al\u0131\u015fabilir. Bu ki\u015filer bazen e\u011fitim veya kendini geli\u015ftirmek i\u00e7in de bu i\u015fe soyunabilir.&nbsp;<\/p>\n\n\n\n<p>Ayr\u0131ca siber su\u00e7lular\u0131n nas\u0131l \u00e7al\u0131\u015ft\u0131\u011f\u0131n\u0131 anlayabilmek ve denemeler yapmak i\u00e7in sanal makinelerde olu\u015fturulmu\u015f i\u015fletim sistemlerine sald\u0131r\u0131lar ger\u00e7ekle\u015ftirilir.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">En B\u00fcy\u00fck ve En Pop\u00fcler Siber Sald\u0131r\u0131lar<\/h2>\n\n\n\n<p>Baz\u0131 siber sald\u0131r\u0131lar hem boyutu hemde ortaya \u00e7\u0131kard\u0131\u011f\u0131 maddi zararlar nedeniyle d\u00fcnya genelinde kaosa neden olmu\u015ftur.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Wannacry<\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"814\" height=\"616\" src=\"https:\/\/www.niobehosting.com\/blog\/wp-content\/uploads\/wannacry.jpg\" alt=\"\" class=\"wp-image-5427\" srcset=\"https:\/\/www.niobehosting.com\/blog\/wp-content\/uploads\/wannacry.jpg 814w, https:\/\/www.niobehosting.com\/blog\/wp-content\/uploads\/wannacry-300x227.jpg 300w, https:\/\/www.niobehosting.com\/blog\/wp-content\/uploads\/wannacry-768x581.jpg 768w, https:\/\/www.niobehosting.com\/blog\/wp-content\/uploads\/wannacry-100x76.jpg 100w, https:\/\/www.niobehosting.com\/blog\/wp-content\/uploads\/wannacry-595x450.jpg 595w\" sizes=\"auto, (max-width: 814px) 100vw, 814px\" \/><figcaption>Wannacry bula\u015fan bir bilgisayar ekran\u0131<\/figcaption><\/figure>\n\n\n\n<p><strong>Wannacry sald\u0131r\u0131s\u0131 <\/strong>bug\u00fcn ya\u015fad\u0131\u011f\u0131m\u0131z Covid-19 pandemisi gibi dijital d\u00fcnyada b\u00fcy\u00fck kitleleri etkilemi\u015ftir. 4 g\u00fcn i\u00e7inde 200 binden fazla bilgisayara bula\u015fan bu zararl\u0131 yaz\u0131l\u0131m baz\u0131 hastanelerin ve kritik \u00f6nemi olan malzemeler \u00fcreten b\u00fcy\u00fck fabrikalar\u0131n \u00e7al\u0131\u015fmas\u0131n\u0131 durdurmu\u015f ve bir\u00e7ok bilgisayardaki veriyi \u015fifreleyerek kullan\u0131lamaz hale getirmi\u015ftir.Wannacry iki kademede i\u015flev g\u00f6ren bir zararl\u0131 yaz\u0131l\u0131md\u0131. Bu zararl\u0131 yaz\u0131l\u0131m ilk a\u015fama da \u00e7ok say\u0131da bilgisayara bula\u015f\u0131r,&nbsp; ikinci a\u015fama da ise bula\u015f olan bilgisayardaki verileri \u015fifreleyerek kullan\u0131lmaz hale getirir. Bula\u015ft\u0131\u011f\u0131 bilgisayar\u0131n verilerini \u015fifreleyen yaz\u0131l\u0131m daha sonra fidye talebi i\u00e7in kullan\u0131ld\u0131. Ad\u0131 \u00fczerinde a\u011flamak istiyorum yani <strong>wannacry<\/strong> d\u00fcnyada bir\u00e7ok ki\u015finin can\u0131n\u0131 yakm\u0131\u015ft\u0131r.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">NotPetya\/ExPetr<\/h3>\n\n\n\n<p><strong>NotPetya\/ExPetr<\/strong> fidye yaz\u0131l\u0131m\u0131 da ayn\u0131 wannacry mant\u0131\u011f\u0131nda \u00e7al\u0131\u015f\u0131yor ancak maliyet olarak d\u00fcnyada \u015fimdiye kadar en b\u00fcy\u00fck maddi zarar yol a\u00e7an zararl\u0131 yaz\u0131l\u0131m olmu\u015ftur. <strong>10 Milyar USD (Amerikan Dolar\u0131<\/strong>) b\u00fcy\u00fckl\u00fc\u011f\u00fcnde zarara yol a\u00e7an bu ransomware \u015fifreledi\u011fi veriler nedeniyle b\u00fcy\u00fck kay\u0131plara yol a\u00e7m\u0131\u015f di\u011fer bir siber sald\u0131r\u0131d\u0131r.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Stuxnet<\/h3>\n\n\n\n<p><strong>Stuxnet,<\/strong> \u00e7ok y\u00f6nl\u00fc bir zararl\u0131 yaz\u0131l\u0131md\u0131 ve bula\u015fmak i\u00e7in internet ba\u011flant\u0131s\u0131na ihtiya\u00e7 duymayan bu vir\u00fcs USB bellekler yard\u0131m\u0131yla da yay\u0131labiliyordu. \u0130ran\u2019\u0131n Uranyum zenginle\u015ftirme sistemini engelleyen <strong>Stuxnet<\/strong>,&nbsp; \u0130ran n\u00fckleer program\u0131n\u0131 bir ka\u00e7 y\u0131l geriye g\u00f6t\u00fcrecek \u00f6l\u00e7\u00fcde zarar yol a\u00e7t\u0131.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Mirai<\/h3>\n\n\n\n<p><strong>Mirai<\/strong> adl\u0131 bir Botnet olu\u015fturma yaz\u0131l\u0131m\u0131 o kadar b\u00fcy\u00fck bir a\u011f olu\u015fturmu\u015f ki bu sayede yap\u0131lan DDoS sald\u0131r\u0131s\u0131nda, DNS sisteminin \u00e7\u00f6kmesine neden olmu\u015ftur bu nedenle Twitter, Netflix, Spotify ve PayPal gibi platformlar\u0131n \u00e7al\u0131\u015fmas\u0131n\u0131 da durdurmu\u015ftur.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Siber Sald\u0131r\u0131 Korunma Y\u00f6ntemleri<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Antivirus Yaz\u0131l\u0131mlar\u0131<\/h3>\n\n\n\n<p>Her ne kadar vir\u00fcs, malware, trojan gibi programlar\u0131 g\u00fcncel antivir\u00fcs uygulamalar\u0131 vas\u0131tas\u0131yla&nbsp; engellemek m\u00fcmk\u00fcnse de programlarda, web sitelerinde veya sunucularda bulunan baz\u0131 a\u00e7\u0131klar etkili exploit ara\u00e7lar\u0131yla bu programlara fark ettirmeden manip\u00fcle edilebilmektedir. Ayr\u0131ca antivirus programlar\u0131n\u0131n tan\u0131mad\u0131\u011f\u0131 yeni geli\u015ftirilmi\u015f vir\u00fcsler ciddi tehdit olu\u015fturmaktad\u0131r. Bilgisayarda antivir\u00fcs yaz\u0131l\u0131m\u0131 var diyerek dikkatsiz ad\u0131mlar atmak sizi zarara u\u011fratabilir.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Firewall<\/h3>\n\n\n\n<p><a href=\"https:\/\/www.niobehosting.com\/blog\/firewall\/\">Firewall <\/a>(Ate\u015f Duvar\u0131) veya g\u00fcvenlik duvar\u0131 denilen bu yaz\u0131l\u0131mlar veya server sistemlerinde kullan\u0131lan donan\u0131mlar (firewall cihazlar\u0131), zararl\u0131 olabilecek program veya kodlar\u0131n sisteminize enjeksiyon yapmas\u0131n\u0131 engellemek \u00fczerine kurulmu\u015ftur. Ancak bu uygulamalar yap\u0131s\u0131 gere\u011fi \u00f6zg\u00fcrce s\u00f6rf yapman\u0131z\u0131 da engelleyecektir. <\/p>\n\n\n\n<p>Firewall kullanan sistemler \u00f6zg\u00fcr bir \u015fekilde internet ba\u011flant\u0131s\u0131 ger\u00e7ekle\u015ftirmeleri zordur. \u0130yi bir g\u00fcvenlik \u00f6nlemi olan firewall programlar\u0131 baz\u0131 antivir\u00fcs uygulamalar\u0131nda \u00fccretsiz olarak sunuluyor.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Proxy veya VPN Kullanmak<\/h3>\n\n\n\n<p>Proxy gibi g\u00fcvenli ve \u00f6zel sunucular \u00fczerinden ba\u011flant\u0131 yapmak ba\u011flant\u0131n\u0131z\u0131n gizlili\u011fi a\u00e7\u0131s\u0131ndan yard\u0131mc\u0131 olabilir. Hedef olman\u0131z durumunda IP adresinizin tespitini zorla\u015ft\u0131r\u0131r ve g\u00fcvenlik sa\u011flar.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Cloudflare<\/h3>\n\n\n\n<p><a href=\"https:\/\/www.niobehosting.com\/blog\/cloudflare-nedir\/\">Cloudflare <\/a>gibi bulut sunucu (server) sistemleri, web sitelerin ve mail sunucular\u0131n\u0131n v.b. <a href=\"https:\/\/www.niobehosting.com\/blog\/ddos\/\">DDoS<\/a> (Distributed Denial of Service) Da\u011f\u0131t\u0131k Hizmet Reddi sald\u0131r\u0131lar\u0131na kar\u015f\u0131 korunmas\u0131n\u0131 sa\u011flayan sanal sunucu sistemleridir. Kullan\u0131c\u0131lar taraf\u0131ndan talep edilen ba\u011flant\u0131 istekleri bulut sistemde olu\u015fturulmu\u015f sunucu (server) yap\u0131lar\u0131 taraf\u0131ndan s\u00fcz\u00fclerek g\u00fcveni taleplerin ger\u00e7ek sunucular\u0131n\u0131za ula\u015fmas\u0131n\u0131 sa\u011flamak, ciddi bir g\u00fcvenlik \u00f6nlemi olarak kar\u015f\u0131m\u0131za \u00e7\u0131k\u0131yor.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Proaktif Uygulamalar<\/h3>\n\n\n\n<p>Bilin\u00e7li internet kullan\u0131c\u0131s\u0131, internetteki risklerin fark\u0131nda olmal\u0131d\u0131r. Bir tehdit daha olu\u015fmadan \u00f6nlem alacak ve engelleyecek ad\u0131mlar\u0131 atmak bunun en \u00f6nemli ve ba\u015far\u0131l\u0131 y\u00f6ntemdir. Yani bir tehdit olu\u015fturacak ad\u0131mlar\u0131 (bilinmeyen kaynaklardan yaz\u0131l\u0131m indirmek, linklere t\u0131klamak, mailleri a\u00e7mak, g\u00fcvensiz sitelerde gezmek v.b) atmayan bir ki\u015finin k\u00f6t\u00fcc\u00fcl ki\u015filer taraf\u0131ndan zarara u\u011frat\u0131lmas\u0131 zordur.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Siber Sald\u0131r\u0131 Su\u00e7 mudur?<\/h2>\n\n\n\n<p><strong>Siber sald\u0131r\u0131<\/strong> ger\u00e7ekle\u015ftirmek ve veri \u00e7almak ciddi bir su\u00e7tur sadece e\u011flence i\u00e7in yap\u0131ld\u0131\u011f\u0131 s\u00f6ylenen eylemler nedeniyle ciddi cezalar alabilirsiniz. Devletler aras\u0131nda \u00f6zellikle casusluk riski ta\u015f\u0131d\u0131\u011f\u0131 i\u00e7in veri \u00e7alma i\u015flemleri \u00e7ok ciddiye al\u0131n\u0131r ve su\u00e7lular\u0131n iadesi anla\u015fmas\u0131 yap\u0131lm\u0131\u015f \u00fclkeler nezdinde yarg\u0131lanabilir ve o \u00fclkede hapse girebilirsiniz.<\/p>\n\n\n\n<p>\u00dclkemizde de Emniyet Genel M\u00fcd\u00fcrl\u00fc\u011f\u00fc\u2019n\u00fcn bu kapsamda olu\u015fturdu\u011fu nitelikli birimleri vard\u0131r. Siber su\u00e7larla m\u00fccadele etmek \u00fczere kurulmu\u015f bu birimler k\u0131sa s\u00fcrede su\u00e7lulara ula\u015f\u0131p ceza verilmesini sa\u011flayabiliyor.&nbsp;<\/p>\n\n\n\n<p><a href=\"https:\/\/www.egm.gov.tr\/siber\/sibersucnedir\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Buradan<\/a> hangi su\u00e7un hangi kapsamda de\u011ferlendirildi\u011fine ula\u015fabilir ve e\u011fer ma\u011fdursan\u0131z <a href=\"https:\/\/www.egm.gov.tr\/online-ihbar\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">buradan<\/a> ihbarda bulunabilirsiniz.<\/p>\n\n\n\n<p>Unutmay\u0131n sald\u0131r\u0131larganlar dikkatsizli\u011finizi kullan\u0131rlar, g\u00fcvenli olmayan sitelerde i\u015flem yapmay\u0131n, bilmedi\u011finiz sitelerden uygulama indirmeyin ve tan\u0131mad\u0131\u011f\u0131n\u0131z ki\u015filerden gelen linklere t\u0131klamay\u0131n.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0130nsanlar internette sanal, siber (Cyber) olarak olu\u015fturulmu\u015f bir ortamda birbirleriyle etkile\u015fiyor veya kolayl\u0131k sa\u011flayan baz\u0131 ki\u015fisel i\u015flemleri ger\u00e7ekle\u015ftiriyor. G\u00fcn\u00fcm\u00fczde resmi veya gayri resmi bir\u00e7ok ki\u015fisel&#8230;<\/p>\n","protected":false},"author":16,"featured_media":5426,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[49],"tags":[],"class_list":["post-5424","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-guvenlik"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Siber Sald\u0131r\u0131 Nedir? - Niobe Hosting<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.niobehosting.com\/blog\/siber-saldiri-nedir\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Siber Sald\u0131r\u0131 Nedir? - Niobe Hosting\" \/>\n<meta property=\"og:description\" content=\"\u0130nsanlar internette sanal, siber (Cyber) olarak olu\u015fturulmu\u015f bir ortamda birbirleriyle etkile\u015fiyor veya kolayl\u0131k sa\u011flayan baz\u0131 ki\u015fisel i\u015flemleri ger\u00e7ekle\u015ftiriyor. 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