{"id":269,"date":"2025-11-24T17:10:53","date_gmt":"2025-11-24T17:10:53","guid":{"rendered":"https:\/\/www.aliburaksan.com\/blog\/?p=269"},"modified":"2025-11-24T17:10:55","modified_gmt":"2025-11-24T17:10:55","slug":"quishing-qr-kod-tuzagina-dikkat","status":"publish","type":"post","link":"https:\/\/www.aliburaksan.com\/blog\/quishing-qr-kod-tuzagina-dikkat\/","title":{"rendered":"Quishing: QR Kod Tuza\u011f\u0131na Dikkat!"},"content":{"rendered":"<style>\n        body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6; color: #333; margin: 0 auto; max-width: 800px; padding: 20px; background-color: #f9f9f9; }<br \/>\n        h1, h2, h3 { color: #0056b3; }<br \/>\n        h2 { border-bottom: 2px solid #eee; padding-bottom: 10px; margin-top: 30px; }<br \/>\n        h3 { color: #007bff; margin-top: 25px; }<br \/>\n        p { margin-bottom: 1em; }<br \/>\n        ul { list-style-type: disc; margin-left: 20px; margin-bottom: 1em; }<br \/>\n        li { margin-bottom: 0.5em; }<br \/>\n        pre { background-color: #e9e9e9; padding: 15px; border-left: 5px solid #007bff; overflow-x: auto; margin-bottom: 1em; }<br \/>\n        code { font-family: 'Consolas', 'Monaco', monospace; font-size: 0.9em; }<br \/>\n        strong { color: #d9534f; }<br \/>\n        em { font-style: italic; color: #5cb85c; }<br \/>\n    <\/style>\n<p>Merhaba arkada\u015flar,<\/p>\n<p>\u00d6zellikle son zamanlarda dijitalle\u015fmenin getirdi\u011fi kolayl\u0131klar\u0131n yan\u0131 s\u0131ra, beraberinde getirdi\u011fi yeni tehditleri de bizzat g\u00f6zlemliyorum. \u0130\u015fte bu tehditlerden biri de hepimizin hayat\u0131na h\u0131zla giren <strong>QR kodlar\u0131<\/strong> \u00fczerinden yap\u0131lan doland\u0131r\u0131c\u0131l\u0131klar: Nam-\u0131 di\u011fer <strong>Quishing<\/strong>!<\/p>\n<p>QR kodlar\u0131, g\u00fcnl\u00fck hayat\u0131m\u0131zda o kadar yayg\u0131nla\u015ft\u0131 ki, restoran men\u00fclerinden banka i\u015flemlerine, otopark \u00f6demelerinden e-ticaret sitelerine kadar her yerde kar\u015f\u0131m\u0131za \u00e7\u0131k\u0131yor. H\u0131zl\u0131, pratik ve temass\u0131z olmas\u0131 sebebiyle pandemi d\u00f6neminde kullan\u0131m\u0131 adeta patlad\u0131. Ama i\u015fte tam da bu kolayl\u0131k ve yayg\u0131nl\u0131k, k\u00f6t\u00fc niyetli ki\u015filerin i\u015ftah\u0131n\u0131 kabart\u0131yor. Hadi gelin, bu konuda neymi\u015f, nas\u0131l korunuruz, ara\u015ft\u0131rmalar\u0131mdan yola \u00e7\u0131karak biraz detayl\u0131 konu\u015fal\u0131m.<\/p>\n<h2>Quishing Nedir? Basit Bir Tan\u0131m<\/h2>\n<p>Ad\u0131ndan da anla\u015f\u0131laca\u011f\u0131 \u00fczere, &#8220;Quishing&#8221; kelimesi <strong>QR<\/strong> (Quick Response) ve <strong>Phishing<\/strong> (Oltalama) kelimelerinin birle\u015fiminden olu\u015fuyor. Temel mant\u0131\u011f\u0131, klasik e-posta veya SMS tabanl\u0131 phishing sald\u0131r\u0131lar\u0131n\u0131n QR kodlar\u0131 arac\u0131l\u0131\u011f\u0131yla ger\u00e7ekle\u015ftirilmesi. Yani, size sahte bir QR kodu sunularak, bu kodu tarad\u0131\u011f\u0131n\u0131zda asl\u0131nda g\u00fcvenli olmayan, k\u00f6t\u00fc niyetli bir web sitesine veya uygulamaya y\u00f6nlendirilmeniz ama\u00e7lan\u0131yor.<\/p>\n<p>Bir\u00e7o\u011fumuz e-postalardaki \u015f\u00fcpheli linkleri tan\u0131may\u0131, SMS&#8217;teki k\u0131salt\u0131lm\u0131\u015f URL&#8217;lere dikkat etmeyi \u00f6\u011frendik. Ama QR kodlar i\u015fi biraz daha farkl\u0131 bir boyuta ta\u015f\u0131yor. \u00c7\u00fcnk\u00fc kodu tarayana kadar arkas\u0131nda ne oldu\u011funu tam olarak g\u00f6remiyorsunuz. Bu da onu, \u00f6zellikle son kullan\u0131c\u0131 i\u00e7in \u00e7ok sinsi bir tehdit haline getiriyor.<\/p>\n<h3>Quishing Sald\u0131r\u0131lar\u0131 Nas\u0131l Ger\u00e7ekle\u015fiyor? Benim G\u00f6zlemledi\u011fim Senaryolar<\/h3>\n<p>IT uzman\u0131 olarak, bu t\u00fcr sald\u0131r\u0131lar\u0131n farkl\u0131 \u015fekillerde kar\u015f\u0131m\u0131za \u00e7\u0131kt\u0131\u011f\u0131n\u0131 g\u00f6r\u00fcyorum. \u0130\u015fte en yayg\u0131n olanlar\u0131:<\/p>\n<ul>\n<li><strong>Sahte E-postalar ve SMS&#8217;ler:<\/strong> Bu, klasik phishing&#8217;in QR kodlu versiyonu. Size bankan\u0131zdan, kargo \u015firketinizden, devlet kurumundan veya pop\u00fcler bir servisten gelmi\u015f gibi g\u00f6r\u00fcnen bir e-posta ya da SMS g\u00f6nderilir. Mesajda &#8220;Hesab\u0131n\u0131z ask\u0131ya al\u0131nd\u0131, do\u011frulamak i\u00e7in QR kodu taray\u0131n&#8221; veya &#8220;Kargonuzu takip etmek i\u00e7in QR kodu okutun&#8221; gibi aciliyet i\u00e7eren ifadeler bulunur. Kodu tarad\u0131\u011f\u0131n\u0131zda, o kurumun sahte giri\u015f sayfas\u0131na y\u00f6nlendirilirsiniz.<\/li>\n<li><strong>Fiziksel QR Kod Manip\u00fclasyonlar\u0131:<\/strong> Bu ger\u00e7ekten sinsi bir y\u00f6ntem. Kamuya a\u00e7\u0131k yerlerde, otob\u00fcs duraklar\u0131nda, kafe ve restoranlarda, hatta ATM&#8217;lerin \u00fczerinde bile g\u00f6rebilece\u011finiz me\u015fru QR kodlar\u0131n\u0131n \u00fczerine, k\u00f6t\u00fc niyetli ki\u015filer kendi sahte QR kodlar\u0131n\u0131 yap\u0131\u015ft\u0131rabilir. Benim kendi tecr\u00fcbelerimden, bir keresinde bir otopark\u0131n \u00f6deme noktas\u0131nda, resmi QR kodunun \u00fczerine yap\u0131\u015ft\u0131r\u0131lm\u0131\u015f, neredeyse birebir ayn\u0131 g\u00f6r\u00fcnen bir etiket tespit etmi\u015ftim. \u015eans eseri dikkatli davrand\u0131m ve fiziki olarak etiket olup olmad\u0131\u011f\u0131n\u0131 kontrol ettim.<\/li>\n<li><strong>Sahte Reklamlar ve Bildirimler:<\/strong> Sosyal medyada, web sitelerinde veya hatta fiziksel bro\u015f\u00fcrlerde \u00e7ekici bir kampanya, indirim veya \u00fccretsiz bir hediye vaat eden sahte reklamlarla kar\u015f\u0131la\u015fabilirsiniz. Bu reklamlar sizi bir QR kodu taramaya te\u015fvik eder ve sonu\u00e7 yine doland\u0131r\u0131c\u0131l\u0131k veya k\u00f6t\u00fc ama\u00e7l\u0131 yaz\u0131l\u0131m bula\u015fmas\u0131 olabilir.<\/li>\n<li><strong>Tedarik Zinciri Sald\u0131r\u0131lar\u0131 (Daha Nadir Ama Etkili):<\/strong> Nadir de olsa, baz\u0131 k\u00f6t\u00fc niyetli ki\u015filer, \u00fcr\u00fcn ambalajlar\u0131na veya kullan\u0131m k\u0131lavuzlar\u0131na sahte QR kodlar\u0131 entegre etmeye \u00e7al\u0131\u015fabilir. Bu, genellikle bir \u00fcr\u00fcne ait uygulama indirmek veya garanti bilgilerine ula\u015fmak i\u00e7in kullan\u0131lmas\u0131 beklenen QR kodlar\u0131n\u0131n k\u00f6t\u00fcye kullan\u0131lmas\u0131d\u0131r.<\/li>\n<\/ul>\n<h3>Peki Neden Bu Kadar Tehlikeli? Bir IT&#8217;ci G\u00f6z\u00fcyle<\/h3>\n<p>Bir IT uzman\u0131 olarak bu t\u00fcr sald\u0131r\u0131lar\u0131 neden ciddiye ald\u0131\u011f\u0131m\u0131 anlatay\u0131m:<\/p>\n<ul>\n<li><strong>URL \u00d6nizlemesi Zorlu\u011fu:<\/strong> E-postada veya mesajda bir link oldu\u011funda, mouse&#8217;u \u00fczerine getirerek URL&#8217;yi \u00f6nizleyebiliriz. QR kodlar\u0131nda bu m\u00fcmk\u00fcn de\u011fil. Tarayana kadar nereye gidece\u011finizi tam olarak bilemezsiniz. Baz\u0131 iyi QR taray\u0131c\u0131 uygulamalar\u0131 bir \u00f6nizleme sunsa da, \u00e7o\u011fu insan h\u0131zla taray\u0131p ge\u00e7iyor.<\/li>\n<li><strong>G\u00fcven Alg\u0131s\u0131:<\/strong> QR kodlar\u0131 genellikle resmi, me\u015fru kaynaklar taraf\u0131ndan kullan\u0131ld\u0131\u011f\u0131 i\u00e7in, insanlar onlara kar\u015f\u0131 do\u011fal bir g\u00fcven duyuyor. &#8220;Kodu tarad\u0131m, kesin do\u011frudur&#8221; alg\u0131s\u0131 \u00e7ok yayg\u0131n.<\/li>\n<li><strong>E-posta Filtrelerini A\u015fma:<\/strong> Antivir\u00fcs yaz\u0131l\u0131mlar\u0131 ve e-posta g\u00fcvenlik filtreleri, bilinen k\u00f6t\u00fc ama\u00e7l\u0131 linkleri tespit edip engelleyebilir. Ancak QR kodlar\u0131, bir g\u00f6rsel i\u00e7inde g\u00f6m\u00fcl\u00fc oldu\u011fu i\u00e7in bu filtrelerin \u00e7o\u011fu zaman dikkatinden ka\u00e7abilir. Yani zararl\u0131 bir URL, bir g\u00f6rselin i\u00e7inde rahatl\u0131kla e-postan\u0131za ula\u015fabilir.<\/li>\n<li><strong>H\u0131z ve Kolayl\u0131k:<\/strong> Kodu taramak sadece saniyeler s\u00fcrer. Bu h\u0131z, kullan\u0131c\u0131lar\u0131n ele\u015ftirel d\u00fc\u015f\u00fcnme ve \u015f\u00fcphecilik mekanizmalar\u0131n\u0131 devre d\u0131\u015f\u0131 b\u0131rakabiliyor.<\/li>\n<\/ul>\n<h2>Peki Nas\u0131l Korunaca\u011f\u0131z? \u0130\u015fte Y\u00f6ntemler!<\/h2>\n<p>Korkmayal\u0131m ama uyan\u0131k olal\u0131m! \u0130\u015fte bu alandaki k\u0131sa ama yo\u011fun deneyimimde edindi\u011fim ve size de \u015fiddetle tavsiye etti\u011fim baz\u0131 \u00f6nlemler:<\/p>\n<ul>\n<li><strong>Her Zaman Kayna\u011f\u0131 Do\u011frula:<\/strong> QR kodunu nereden tarad\u0131\u011f\u0131n\u0131z\u0131 d\u00fc\u015f\u00fcn\u00fcn. Bir e-posta veya SMS ile mi geldi? G\u00f6nderici ger\u00e7ekten kim? G\u00fcvenilir bir kaynaktan m\u0131 geliyor ve b\u00f6yle bir QR kodu g\u00f6ndermesini bekliyor muydunuz? \u015e\u00fcpheliyseniz, direkt olarak ilgili kurumun resmi web sitesine gidin veya telefonla ileti\u015fime ge\u00e7in, asla QR kodu tarayarak ilerlemeyin.<\/li>\n<li><strong>Fiziksel Kodlara Dikkat Et:<\/strong> Kamuya a\u00e7\u0131k alanlarda g\u00f6rd\u00fc\u011f\u00fcn\u00fcz QR kodlar\u0131n\u0131n fiziksel durumunu kontrol edin. \u00dczerine yap\u0131\u015ft\u0131r\u0131lm\u0131\u015f bir etiket mi var? Kenarlar\u0131 kalk\u0131yor mu? Renk veya kalite fark\u0131 var m\u0131? E\u011fer \u015f\u00fcpheli g\u00f6r\u00fcn\u00fcyorsa, taramay\u0131n. Hatta ben olsam, bir restoranda bile men\u00fc i\u00e7in verilen QR kodunu taramadan \u00f6nce bir g\u00f6z atar\u0131m, \u00fcst\u00fcne bir etiket yap\u0131\u015ft\u0131r\u0131lm\u0131\u015f m\u0131 diye.<\/li>\n<li><strong>G\u00fcvenilir Bir QR Kod Taray\u0131c\u0131 Kullan:<\/strong> Baz\u0131 kaliteli QR kod taray\u0131c\u0131 uygulamalar\u0131 (\u00f6zellikle telefonunuzun dahili kamera uygulamas\u0131), kodu taramadan \u00f6nce sizi y\u00f6nlendirece\u011fi URL&#8217;yi \u00f6nizler. Bu, size nereye gitti\u011finizi kontrol etme f\u0131rsat\u0131 verir. Bu \u00f6zelli\u011fi sunan uygulamalar\u0131 tercih edin.<\/li>\n<li><strong>URL&#8217;yi Kontrol Etmeyi Al\u0131\u015fkanl\u0131k Haline Getir:<\/strong> Taray\u0131c\u0131 size linki g\u00f6sterdi\u011finde, t\u0131klamadan \u00f6nce adresi dikkatlice inceleyin. Bankan\u0131z\u0131n web sitesi mi? Yoksa &#8220;bankaniz.com.tr&#8221; yerine &#8220;bankaniz-guvenlik.xyz&#8221; gibi farkl\u0131 bir alan ad\u0131 m\u0131? K\u00fc\u00e7\u00fck harf veya say\u0131 farkl\u0131l\u0131klar\u0131na dikkat edin.\n<pre><code>\nGer\u00e7ek: https:\/\/www.bankaadi.com\/giris\nSahte: https:\/\/bankaadi-guvenlik.xyz\/giris\nSahte: https:\/\/www.bankaadl.com\/giris (burada 'i' yerine 'l' harfi kullan\u0131lm\u0131\u015f)\n            <\/code><\/pre>\n<p>K\u00fc\u00e7\u00fck farkl\u0131l\u0131klar b\u00fcy\u00fck tehlikeler yaratabilir.<\/li>\n<li><strong>\u015e\u00fcpheci Ol:<\/strong> &#8220;\u00c7ok iyi olamayacak kadar ger\u00e7ek&#8221; g\u00f6r\u00fcnen tekliflere, \u00fccretsiz hediyelere veya acil durum bildirimlerine kar\u015f\u0131 her zaman \u015f\u00fcpheci olun. Doland\u0131r\u0131c\u0131lar genellikle bu t\u00fcr cazip veya korkutucu senaryolar\u0131 kullan\u0131r.<\/li>\n<li><strong>G\u00fc\u00e7l\u00fc \u015eifreler ve \u0130ki Fakt\u00f6rl\u00fc Kimlik Do\u011frulama (MFA) Kullan:<\/strong> En iyi savunma, her zaman g\u00fc\u00e7l\u00fc bir savunmad\u0131r. E\u011fer bir \u015fekilde tuza\u011fa d\u00fc\u015fseniz bile, g\u00fc\u00e7l\u00fc ve farkl\u0131 \u015fifreler kullanmak, ayr\u0131ca m\u00fcmk\u00fcn olan her yerde MFA (SMS kodu, biyometrik do\u011frulama vb.) etkinle\u015ftirmek, hesaplar\u0131n\u0131z\u0131 koruman\u0131za yard\u0131mc\u0131 olur.<\/li>\n<li><strong>Yaz\u0131l\u0131mlar\u0131n\u0131z\u0131 G\u00fcncel Tutun:<\/strong> \u0130\u015fletim sisteminizi, taray\u0131c\u0131n\u0131z\u0131 ve t\u00fcm uygulamalar\u0131n\u0131z\u0131 d\u00fczenli olarak g\u00fcncelleyin. Bu g\u00fcncellemeler, bilinen g\u00fcvenlik a\u00e7\u0131klar\u0131n\u0131 kapat\u0131r ve sizi yeni tehditlere kar\u015f\u0131 korur.<\/li>\n<li><strong>Fark\u0131ndal\u0131\u011f\u0131 Art\u0131r:<\/strong> Bu bilgileri sadece kendiniz i\u00e7in de\u011fil, aileniz, arkada\u015flar\u0131n\u0131z ve i\u015f arkada\u015flar\u0131n\u0131zla da payla\u015f\u0131n. Dijital g\u00fcvenlik bir ekip i\u015fidir.<\/li>\n<\/ul>\n<h3>Ya K\u00f6t\u00fc Bir \u015eeyi Tarad\u0131ysam? Panik Yok!<\/h3>\n<p>Hepimiz insan\u0131z ve hata yapabiliriz. E\u011fer \u015f\u00fcpheli bir QR kodunu taray\u0131p bir siteye y\u00f6nlendirildiyseniz:<\/p>\n<ul>\n<li><strong>Kesinlikle Hi\u00e7bir Bilgi Girmeyin:<\/strong> Kullan\u0131c\u0131 ad\u0131, \u015fifre, kredi kart\u0131 bilgisi gibi hassas verileri asla girmeyin.<\/li>\n<li><strong>Hemen Sayfay\u0131 Kapat\u0131n:<\/strong> Taray\u0131c\u0131y\u0131 veya uygulamay\u0131 derhal kapat\u0131n.<\/li>\n<li><strong>\u0130lgili Hesaplar\u0131n\u0131z\u0131n \u015eifrelerini De\u011fi\u015ftirin:<\/strong> E\u011fer o siteye girmeniz gereken bir kullan\u0131c\u0131 ad\u0131\/\u015fifre \u00e7iftini daha \u00f6nce ba\u015fka yerlerde de kulland\u0131ysan\u0131z, t\u00fcm bu hesaplar\u0131n \u015fifrelerini acilen de\u011fi\u015ftirin.<\/li>\n<li><strong>Bankan\u0131z\u0131 veya \u0130lgili Kurumu Bilgilendirin:<\/strong> E\u011fer banka bilgileriyle ilgili bir durum oldu\u011funu d\u00fc\u015f\u00fcn\u00fcyorsan\u0131z, hemen bankan\u0131zla ileti\u015fime ge\u00e7in.<\/li>\n<li><strong>Cihaz\u0131n\u0131z\u0131 Kontrol Edin:<\/strong> K\u00f6t\u00fc ama\u00e7l\u0131 yaz\u0131l\u0131m bula\u015fma ihtimaline kar\u015f\u0131 cihaz\u0131n\u0131zda g\u00fcvenilir bir antivir\u00fcs yaz\u0131l\u0131m\u0131 ile tam bir tarama yap\u0131n.<\/li>\n<li><strong>Raporlay\u0131n:<\/strong> E\u011fer bir phishing e-postas\u0131 veya SMS ald\u0131ysan\u0131z, bunu ilgili kuruma (banka, kargo \u015firketi vb.) ve e\u011fer varsa siber g\u00fcvenlik yetkililerine bildirin.<\/li>\n<\/ul>\n<h2>Sonu\u00e7: Uyan\u0131k Ol, G\u00fcvende Kal!<\/h2>\n<p>Dijital d\u00fcnya h\u0131zla de\u011fi\u015fiyor ve biz IT uzmanlar\u0131 olarak bu de\u011fi\u015fimleri takip etmek zorunday\u0131z. Ama en \u00f6nemlisi, kullan\u0131c\u0131lar\u0131 bilin\u00e7lendirmek. Quishing, yeni nesil bir doland\u0131r\u0131c\u0131l\u0131k t\u00fcr\u00fc olsa da, temelinde phishing&#8217;in insani zaaflar\u0131 hedeflemesi yat\u0131yor. Biz IT uzmanlar\u0131n\u0131n bile her an tetikte olmas\u0131 gereken bir konu bu. Unutmay\u0131n, en iyi g\u00fcvenlik \u00f6nlemi, <strong>bilin\u00e7li ve dikkatli bir kullan\u0131c\u0131 olmakt\u0131r.<\/strong><\/p>\n<p>Hepinize g\u00fcvenli s\u00f6rfler dilerim!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Quishing nedir? QR kod doland\u0131r\u0131c\u0131l\u0131\u011f\u0131na dikkat! Siber sald\u0131rganlar\u0131n yeni takti\u011fiyle nas\u0131l korunaca\u011f\u0131n\u0131z\u0131 \u00f6\u011frenin. G\u00fcvenli\u011finiz i\u00e7in ipu\u00e7lar\u0131.<\/p>\n","protected":false},"author":1,"featured_media":268,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[36],"tags":[18,60,61,62,59,17],"class_list":["post-269","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-siber-guvenlik-istihbarat","tag-cyber-security","tag-phising","tag-qr","tag-qr-kod","tag-quishing","tag-siber-guvenlik"],"blocksy_meta":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Quishing: QR Kod Tuza\u011f\u0131na Dikkat! - Ali Burak \u015ean<\/title>\n<meta name=\"description\" content=\"Quishing nedir? QR kod doland\u0131r\u0131c\u0131l\u0131\u011f\u0131na dikkat! Siber sald\u0131rganlar\u0131n yeni takti\u011fiyle nas\u0131l korunaca\u011f\u0131n\u0131z\u0131 \u00f6\u011frenin. 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