{"id":14703,"date":"2025-03-09T21:15:15","date_gmt":"2025-03-09T18:15:15","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/letsdefend-siem-uyarisi-iceriden-iceriye-oltalama-maili-algilandi-eventid-52\/"},"modified":"2025-03-09T21:15:15","modified_gmt":"2025-03-09T18:15:15","slug":"letsdefend-siem-uyarisi-iceriden-iceriye-oltalama-maili-algilandi-eventid-52","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/letsdefend-siem-uyarisi-iceriden-iceriye-oltalama-maili-algilandi-eventid-52\/","title":{"rendered":"LetsDefend SIEM Uyar\u0131s\u0131: \u0130\u00e7eriden \u0130\u00e7eriye Oltalama Maili Alg\u0131land\u0131 (EventID: 52)"},"content":{"rendered":"<p><body><\/p>\n<p>LetsDefend SIEM Uyar\u0131s\u0131: \u0130\u00e7eriden \u0130\u00e7eriye Oltalama Maili Alg\u0131land\u0131 (EventID: 52)<\/p>\n<p>LetsDefend SIEM sisteminizden gelen &#8220;Phishing Mail Detected &#8211; Internal to Internal &#8211; EventID: 52&#8221; uyar\u0131s\u0131, \u015firket a\u011f\u0131n\u0131z i\u00e7inde bir oltalama e-postas\u0131n\u0131n tespit edildi\u011fini g\u00f6sterir.  Bu durum, ciddi bir g\u00fcvenlik zafiyetini i\u015faret eder ve acil m\u00fcdahale gerektirir.  \u00c7\u00fcnk\u00fc bu, i\u00e7eriden bir tehdidin veya k\u00f6t\u00fc ama\u00e7l\u0131 yaz\u0131l\u0131m\u0131n varl\u0131\u011f\u0131n\u0131 g\u00f6sterebilir.<\/p>\n<p><strong>Bu uyar\u0131n\u0131n anlam\u0131 nedir?<\/strong>  EventID 52, LetsDefend&#8217;in oltalama e-postalar\u0131n\u0131 tespit etmek i\u00e7in kulland\u0131\u011f\u0131 belirli bir olay kimli\u011fidir.  &#8220;\u0130\u00e7eriden \u0130\u00e7eriye&#8221; ifadesi ise e-postan\u0131n \u015firket a\u011f\u0131ndaki bir kullan\u0131c\u0131dan ba\u015fka bir kullan\u0131c\u0131ya g\u00f6nderildi\u011fini g\u00f6sterir. Bu, bir \u00e7al\u0131\u015fan\u0131n hesab\u0131n\u0131n ele ge\u00e7irilmi\u015f olabilece\u011fi veya bir i\u00e7 tehdit unsurunun devrede olabilece\u011fi anlam\u0131na gelir.  Ba\u015fka bir deyi\u015fle, \u015firket a\u011f\u0131n\u0131z\u0131n g\u00fcvenli\u011fi ihlal edilmi\u015f olabilir.<\/p>\n<p><strong>Olas\u0131 Nedenler Nelerdir?<\/strong> Birka\u00e7 farkl\u0131 sebep bu uyar\u0131n\u0131n tetiklenmesine yol a\u00e7abilir. \u00d6rne\u011fin, bir \u00e7al\u0131\u015fan\u0131n hesab\u0131n\u0131n ele ge\u00e7irilmesi ve bu hesab\u0131n k\u00f6t\u00fc ama\u00e7l\u0131 e-postalar g\u00f6ndermek i\u00e7in kullan\u0131lmas\u0131 en yayg\u0131n senaryolardan biridir.  Bunun yan\u0131 s\u0131ra, bir \u00e7al\u0131\u015fan yanl\u0131\u015fl\u0131kla k\u00f6t\u00fc ama\u00e7l\u0131 bir ek dosya i\u00e7eren bir e-postay\u0131 a\u00e7abilir ve bu durumun, \u015firket a\u011f\u0131nda yay\u0131lan bir zararl\u0131 yaz\u0131l\u0131m enfeksiyonuna sebep olabilir.  Ayr\u0131ca, \u00e7al\u0131\u015fanlar\u0131n g\u00fcvenlik e\u011fitimlerinin eksik olmas\u0131 veya g\u00fcvenlik protokollerine uyulmamas\u0131 da bu t\u00fcr olaylara zemin haz\u0131rlar.  Elbette, \u015firket a\u011f\u0131n\u0131zda bulunan g\u00fcvenlik a\u00e7\u0131klar\u0131ndan da faydalan\u0131larak bu sald\u0131r\u0131lar ger\u00e7ekle\u015ftirilebilir.<\/p>\n<p><strong>Ne Yapmal\u0131y\u0131m?<\/strong>  Bu uyar\u0131y\u0131 ald\u0131ktan sonra, \u00f6ncelikle panik yapmadan sistematik bir yakla\u015f\u0131m izlenmelidir. \u0130lk ad\u0131m, oltalama e-postas\u0131n\u0131n i\u00e7eri\u011fini ve g\u00f6ndericisini incelemektir.  Ard\u0131ndan, ilgili \u00e7al\u0131\u015fan\u0131n hesab\u0131n\u0131 derhal incelemeli ve gerekli g\u00fcvenlik \u00f6nlemlerini almal\u0131s\u0131n\u0131z.  \u015e\u00fcpheli aktivite tespit edilirse, hesab\u0131n \u015fifresi de\u011fi\u015ftirilmeli ve hesap ge\u00e7ici olarak ask\u0131ya al\u0131nmal\u0131d\u0131r.  Bu a\u015famada,  bilgi g\u00fcvenli\u011fi uzmanlar\u0131ndan yard\u0131m almak son derece \u00f6nemlidir.  Sistemlerinizde antivir\u00fcs taramalar\u0131 yapmal\u0131, a\u011f trafi\u011fini analiz etmeli ve olas\u0131 g\u00fcvenlik a\u00e7\u0131klar\u0131n\u0131 gidermelisiniz.  Ayr\u0131ca, \u00e7al\u0131\u015fanlar\u0131n\u0131z i\u00e7in d\u00fczenli g\u00fcvenlik fark\u0131ndal\u0131k e\u011fitimleri d\u00fczenlemek de b\u00fcy\u00fck \u00f6nem ta\u015f\u0131r.<\/p>\n<p><strong>\u00d6nleyici Tedbirler:<\/strong>  Gelecekte benzer olaylar\u0131n ya\u015fanmas\u0131n\u0131 \u00f6nlemek i\u00e7in \u00e7e\u015fitli \u00f6nlemler alabilirsiniz. G\u00fc\u00e7l\u00fc ve benzersiz \u015fifrelerin kullan\u0131m\u0131, \u00e7ok fakt\u00f6rl\u00fc kimlik do\u011frulama (MFA) gibi g\u00fcvenlik \u00f6nlemlerinin uygulanmas\u0131, d\u00fczenli g\u00fcvenlik e\u011fitimleri ve g\u00fcncel g\u00fcvenlik yaz\u0131l\u0131mlar\u0131n\u0131n kullan\u0131m\u0131 bunlardan sadece birka\u00e7\u0131d\u0131r.  Ayr\u0131ca, a\u011f\u0131n\u0131z\u0131n d\u00fczenli olarak g\u00fcvenlik denetimlerinden ge\u00e7irilmesi ve olas\u0131 g\u00fcvenlik a\u00e7\u0131klar\u0131n\u0131n kapat\u0131lmas\u0131 da son derece \u00f6nemlidir.  \u015eirket i\u00e7i bir g\u00fcvenlik politikas\u0131n\u0131n olu\u015fturulmas\u0131 ve \u00e7al\u0131\u015fanlara bu politikan\u0131n anlat\u0131lmas\u0131 olduk\u00e7a gereklidir.<\/p>\n<p>Bu uyar\u0131, \u015firketinizin siber g\u00fcvenli\u011fi i\u00e7in ciddi bir risk olu\u015fturmaktad\u0131r.  H\u0131zl\u0131 ve etkili bir \u015fekilde m\u00fcdahale etmek, olas\u0131 zarar\u0131 en aza indirmenize yard\u0131mc\u0131 olacakt\u0131r.  Daha fazla bilgi i\u00e7in <a href=\"https:\/\/fatihsoysal.com\">fatihsoysal.com<\/a> sitesini ziyaret edebilirsiniz.  Ayr\u0131ca, g\u00fcvenlik uzmanlar\u0131ndan destek almay\u0131 unutmay\u0131n.<\/p>\n<p>Daha detayl\u0131 bilgi i\u00e7in  <a href=\"https:\/\/dev.to\/binarybastion\/letsdefend-siem-alert-phishing-mail-detected-internal-to-internal-eventid-52-567e\">bu \u0130ngilizce makaleye<\/a> g\u00f6z atabilirsiniz.<\/p>\n<p><\/body><br \/>\n<\/html><\/p>\n<p>#Etiketler: LetsDefend, SIEM, Oltalama Maili, Phishing, \u0130\u00e7 G\u00fcvenlik, Siber G\u00fcvenlik, EventID 52, G\u00fcvenlik Uyar\u0131s\u0131, \u0130\u00e7 Tehdit, G\u00fcvenlik A\u00e7\u0131\u011f\u0131, K\u00f6t\u00fc Ama\u00e7l\u0131 Yaz\u0131l\u0131m, \u00c7ok Fakt\u00f6rl\u00fc Kimlik Do\u011frulama, MFA, G\u00fcvenlik E\u011fitimi, Bilgi G\u00fcvenli\u011fi<\/p>\n","protected":false},"excerpt":{"rendered":"LetsDefend SIEM Uyar\u0131s\u0131: \u0130\u00e7eriden \u0130\u00e7eriye Oltalama Maili Alg\u0131land\u0131 (EventID: 52) LetsDefend SIEM sisteminizden gelen &#8220;Phishing Mail Detected &#8211;&hellip;","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-14703","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-genel","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.5 (Yoast SEO v25.3.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>LetsDefend SIEM Uyar\u0131s\u0131: \u0130\u00e7eriden \u0130\u00e7eriye Oltalama Maili Alg\u0131land\u0131 (EventID: 52)<\/title>\n<meta name=\"description\" content=\"LetsDefend SIEM sisteminizden gelen &quot;Phishing Mail Detected - Internal to Internal - EventID: 52&quot; uyar\u0131s\u0131, \u015firket a\u011f\u0131n\u0131z i\u00e7inde bir oltalama e-postas\u0131n\u0131n tespit edildi\u011fini g\u00f6sterir. Bu durum, ciddi bir g\u00fcvenlik zafiyetini i\u015faret eder ve acil m\u00fcdahale gerektirir. \u00c7\u00fcnk\u00fc bu, i\u00e7eriden bir tehdidin veya k\u00f6t\u00fc ama\u00e7l\u0131 yaz\u0131l\u0131m\u0131n varl\u0131\u011f\u0131n\u0131 g\u00f6sterebilir.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/fatihsoysal.com\/blog\/letsdefend-siem-uyarisi-iceriden-iceriye-oltalama-maili-algilandi-eventid-52\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"LetsDefend SIEM Uyar\u0131s\u0131: \u0130\u00e7eriden \u0130\u00e7eriye Oltalama Maili Alg\u0131land\u0131 (EventID: 52)\" \/>\n<meta property=\"og:description\" content=\"LetsDefend SIEM sisteminizden gelen &quot;Phishing Mail Detected - Internal to Internal - EventID: 52&quot; uyar\u0131s\u0131, \u015firket a\u011f\u0131n\u0131z i\u00e7inde bir oltalama e-postas\u0131n\u0131n tespit edildi\u011fini g\u00f6sterir. Bu durum, ciddi bir g\u00fcvenlik zafiyetini i\u015faret eder ve acil m\u00fcdahale gerektirir. \u00c7\u00fcnk\u00fc bu, i\u00e7eriden bir tehdidin veya k\u00f6t\u00fc ama\u00e7l\u0131 yaz\u0131l\u0131m\u0131n varl\u0131\u011f\u0131n\u0131 g\u00f6sterebilir.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fatihsoysal.com\/blog\/letsdefend-siem-uyarisi-iceriden-iceriye-oltalama-maili-algilandi-eventid-52\/\" \/>\n<meta property=\"og:site_name\" content=\"Kodlar\u0131n Gizemli D\u00fcnyas\u0131\" \/>\n<meta property=\"article:published_time\" content=\"2025-03-09T18:15:15+00:00\" \/>\n<meta name=\"author\" content=\"Fatih Soysal\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Yazan:\" \/>\n\t<meta name=\"twitter:data1\" content=\"Fatih Soysal\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tahmini okuma s\u00fcresi\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 dakika\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/letsdefend-siem-uyarisi-iceriden-iceriye-oltalama-maili-algilandi-eventid-52\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/letsdefend-siem-uyarisi-iceriden-iceriye-oltalama-maili-algilandi-eventid-52\/\"},\"author\":{\"name\":\"Fatih Soysal\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"headline\":\"LetsDefend SIEM Uyar\u0131s\u0131: \u0130\u00e7eriden \u0130\u00e7eriye Oltalama Maili Alg\u0131land\u0131 (EventID: 52)\",\"datePublished\":\"2025-03-09T18:15:15+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/letsdefend-siem-uyarisi-iceriden-iceriye-oltalama-maili-algilandi-eventid-52\/\"},\"wordCount\":648,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/fatihsoysal.com\/blog\/letsdefend-siem-uyarisi-iceriden-iceriye-oltalama-maili-algilandi-eventid-52\/#respond\"]}],\"copyrightYear\":\"2025\",\"copyrightHolder\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/letsdefend-siem-uyarisi-iceriden-iceriye-oltalama-maili-algilandi-eventid-52\/\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/letsdefend-siem-uyarisi-iceriden-iceriye-oltalama-maili-algilandi-eventid-52\/\",\"name\":\"LetsDefend SIEM Uyar\u0131s\u0131: \u0130\u00e7eriden \u0130\u00e7eriye Oltalama Maili Alg\u0131land\u0131 (EventID: 52)\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#website\"},\"datePublished\":\"2025-03-09T18:15:15+00:00\",\"description\":\"LetsDefend SIEM sisteminizden gelen \\\"Phishing Mail Detected - Internal to Internal - EventID: 52\\\" uyar\u0131s\u0131, \u015firket a\u011f\u0131n\u0131z i\u00e7inde bir oltalama e-postas\u0131n\u0131n tespit edildi\u011fini g\u00f6sterir. 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