{"id":916,"date":"2026-08-05T05:55:01","date_gmt":"2026-08-05T05:55:01","guid":{"rendered":"https:\/\/windowsreport.com\/dk\/greatness-phishing-service-spoofer-ringcentral-for-at-stjaele-microsoft-365-konti-3\/"},"modified":"2026-08-05T05:55:01","modified_gmt":"2026-08-05T05:55:01","slug":"greatness-phishing-service-spoofer-ringcentral-for-at-stjaele-microsoft-365-konti-3","status":"publish","type":"post","link":"https:\/\/windowsreport.com\/dk\/greatness-phishing-service-spoofer-ringcentral-for-at-stjaele-microsoft-365-konti-3\/","title":{"rendered":"Greatness Phishing Service spoof&#8217;er RingCentral for at stj\u00e6le Microsoft 365-konti"},"content":{"rendered":"\n<p>Phishing-tjenesten Greatness udgiver sig nu for at v\u00e6re RingCentral for at stj\u00e6le Microsoft 365-konti gennem adversary-in-the-middle- og device-code-angreb.<\/p>\n\n\n\n<p>Greatness fungerede oprindeligt som en traditionel phishing-tjeneste til stj\u00e6ling af legitimationsoplysninger. Den har siden udviklet sig til en bredere platform, der kan opfange godkendelsestokens og omg\u00e5 visse former for multifaktorautentificering.<\/p>\n\n\n\n<p>Kampagner har prim\u00e6rt v\u00e6ret rettet mod brugere i USA, Canada, Storbritannien, Australien og Sydafrika. Platformen har ogs\u00e5 udvidet sig ud over Microsoft 365 til at underst\u00f8tte angreb mod iCloud-, Yahoo- og Google Workspace-konti.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-attackers-impersonate-ringcentral-notifications\">Angribere udgiver sig for at sende RingCentral-meddelelser<\/h2>\n\n\n\n<p><a href=\"https:\/\/zerobec.com\/blog\/greatness-phaas-aitm-and-device-code-phishing\" target=\"_blank\" rel=\"noopener noreferrer\">ZeroBEC-forskere<\/a> observerede, at Greatness-operat\u00f8rer udnyttede RingCentrals betroede status til at omg\u00e5 e-mail-sikkerhedsbeskyttelser.<\/p>\n\n\n\n<p>Angriberne forfalskede adressen service@ringcentral[.]com og sendte ondsindede e-mails til legitime RingCentral-kunder. Meddelelserne fremstod som voicemail-beskeder eller advarsler om medarbejderes pr\u00e6stationsvurderinger.<\/p>\n\n\n\n<p>Hver e-mail indeholdt en fabrikeret meddelelse, der h\u00e6vdede, at afsenderen havde modtaget godkendelse gennem organisationens liste over sikre afsendere. Denne meddelelse fik e-mailene til at virke mere trov\u00e6rdige og opfordrede modtagerne til at klikke p\u00e5 en indlejret knap.<\/p>\n\n\n\n<p>If\u00f8lge ZeroBEC tildelte Microsoft Exchange meddelelserne et Spam Confidence Level p\u00e5 -1. Denne klassificering gjorde, at e-mailene kunne undg\u00e5 normal spamfiltrering.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-greatness-steals-microsoft-365-authentication-tokens\">Greatness stj\u00e6ler Microsoft 365-godkendelsestokens<\/h3>\n\n\n\n<p>Et klik p\u00e5 den ondsindede knap omdirigerede ofrene til infrastruktur kontrolleret af Greatness-operat\u00f8rer.<\/p>\n\n\n\n<p>Nogle ofre endte p\u00e5 en Microsoft adversary-in-the-middle-phishing-side. Siden opfangede godkendelsestokens, efter at brugeren havde gennemf\u00f8rt en MFA-anmodning.<\/p>\n\n\n\n<p>Andre ofre gik ind i en device-code-phishing-proces, som overtalte dem til at godkende en angriberkontrolleret session gennem Microsofts legitime godkendelsessystem.<\/p>\n\n\n\n<p>Efter at have opn\u00e5et adgang genbrugte angriberne stj\u00e5lne Microsoft 365-tokens gennem virtuelle private servere og kommercielle VPN-tjenester. Dette gjorde det muligt for dem at f\u00e5 adgang til kompromitterede konti uden at gennemf\u00f8re endnu en standardlogon.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-attackers-search-emails-teams-chats-and-cloud-files\">Angribere s\u00f8ger i e-mails, Teams-chats og cloud-filer<\/h3>\n\n\n\n<p>Angriberne s\u00f8gte i Outlook-postkasser og Microsoft Teams-samtaler efter at have kompromitteret en konto.<\/p>\n\n\n\n<p>De fik ogs\u00e5 adgang til SharePoint-websteder, OneDrive-filer, kontakter, kalendere og registrerede applikationer. Meget af informationen blev indsamlet gennem Microsoft Graph.<\/p>\n\n\n\n<p>I nogle tilf\u00e6lde forblev den uautoriserede adgang aktiv i mere end to uger, hvilket gav angriberne tid til at s\u00f8ge efter f\u00f8lsomme forretningsoplysninger og identificere yderligere m\u00e5l.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-researchers-examine-possible-ringcentral-breach-connection\">Forskere unders\u00f8ger mulig forbindelse til RingCentral-brud<\/h3>\n\n\n\n<p>RingCentral bekr\u00e6ftede for nylig et separat databrud, som trusselsgruppen ShinyHunters h\u00e6vdede at st\u00e5 bag. Virksomheden oplyste, at h\u00e6ndelsen p\u00e5virkede oplysninger tilh\u00f8rende et begr\u00e6nset antal kunder, og at de kontaktede dem direkte.<\/p>\n\n\n\n<p>ZeroBEC mener, at Greatness-brugere kan have f\u00e5et fat i en liste over gyldige RingCentral-kunder fra dette brud. Forskerne kunne dog ikke bekr\u00e6fte en direkte forbindelse mellem h\u00e6ndelserne.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-organizations-should-review-email-allowlists\">Organisationer b\u00f8r gennemg\u00e5 e-mail-allowlister<\/h3>\n\n\n\n<p>Sikkerhedsteams b\u00f8r gennemg\u00e5 lister over sikre afsendere og e-mail-allowlister for alt for brede undtagelser. Organisationer b\u00f8r erstatte generelle dom\u00e6neekskluderinger med regler, der ogs\u00e5 kr\u00e6ver gyldig SPF-, DKIM- og DMARC-autentificering.<\/p>\n\n\n\n<p>Administratorer b\u00f8r ogs\u00e5 unders\u00f8ge us\u00e6dvanlige MFA-godkendte Microsoft 365-login fra hostingudbydere, virtuelle private servere eller kommercielle VPN-adresser.<\/p>\n\n\n\n<p>N\u00e5r administratorer har mistanke om en kompromittering, b\u00f8r de straks tilbagekalde aktiv adgang og opdatere tokens. De b\u00f8r ogs\u00e5 gennemg\u00e5 OAuth-rettigheder, Microsoft Graph-aktivitet, registrerede applikationer og adgang p\u00e5 tv\u00e6rs af Microsoft 365-tjenester.<\/p>\n\n\n\n<p>I andre sikkerhedsnyheder afsl\u00f8rede Microsoft en <a href=\"https:\/\/windowsreport.com\/dk\/microsoft-afslorer-global-hotel-wi-fi-malwarekampagne-4\/\" target=\"_blank\" rel=\"noopener noreferrer\">global hotel Wi-Fi-malwarekampagne<\/a> og begr\u00e6nsede <a href=\"https:\/\/windowsreport.com\/dk\/microsoft-forkorter-nuget-api-noglers-gyldighedsperioder-til-30-dage\/\" target=\"_blank\" rel=\"noopener noreferrer\">NuGet API-n\u00f8glers levetid til 30 dage<\/a>.<\/p>\n\n\n\n<p>Malware har ogs\u00e5 opdaget nye teknikker, der kan stj\u00e6le Google-passkeys, hvilket rejser yderligere bekymringer om sikkerheden ved adgangskodel\u00f8se autentificeringssystemer.<\/p>\n\n\n\n<p>Via <a href=\"https:\/\/www.bleepingcomputer.com\/news\/security\/phishing-service-spoofs-ringcentral-to-steal-microsoft-365-accounts\/\" target=\"_blank\" rel=\"noopener noreferrer\">BleepingComputer<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Phishing-tjenesten Greatness udgiver sig nu for at v\u00e6re RingCentral for at stj\u00e6le Microsoft 365-konti gennem adversary-in-the-middle- og device-code-angreb. Greatness fungerede oprindeligt som en traditionel phishing-tjeneste til stj\u00e6ling af legitimationsoplysninger. Den har siden udviklet sig til en bredere platform, der kan opfange godkendelsestokens og omg\u00e5 visse former for multifaktorautentificering. Kampagner har prim\u00e6rt v\u00e6ret rettet mod brugere [&hellip;]<\/p>\n","protected":false},"author":49,"featured_media":917,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_enabled_clarity":"","footnotes":""},"categories":[1],"tags":[],"work":[],"class_list":["post-916","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.1 (Yoast SEO v28.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Greatness Phishing Service spoof&#039;er RingCentral for at stj\u00e6le Microsoft 365-konti - WindowsReport DK (Danish)<\/title>\n<meta name=\"description\" content=\"Greatness-angribere forfalsker RingCentral-advarsler for at stj\u00e6le Microsoft 365-tokens gennem AiTM- og device-code phishing-angreb.\" \/>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Greatness Phishing Service spoof&#039;er RingCentral for at stj\u00e6le Microsoft 365-konti\" \/>\n<meta property=\"og:description\" content=\"Greatness-angribere forfalsker RingCentral-advarsler for at stj\u00e6le Microsoft 365-tokens gennem AiTM- og device-code phishing-angreb.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/windowsreport.com\/dk\/greatness-phishing-service-spoofer-ringcentral-for-at-stjaele-microsoft-365-konti-3\/\" \/>\n<meta property=\"og:site_name\" content=\"WindowsReport DK (Danish)\" \/>\n<meta property=\"article:published_time\" content=\"2026-08-05T05:55:01+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/windowsreport.com\/dk\/wp-content\/uploads\/sites\/12\/2026\/08\/tycoon2fa-microsoft-365-4.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1280\" \/>\n\t<meta property=\"og:image:height\" content=\"801\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Milan Stanojevic\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@MilanStanojev17\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Milan Stanojevic\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/windowsreport.com\\\/dk\\\/greatness-phishing-service-spoofer-ringcentral-for-at-stjaele-microsoft-365-konti-3\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/windowsreport.com\\\/dk\\\/greatness-phishing-service-spoofer-ringcentral-for-at-stjaele-microsoft-365-konti-3\\\/\"},\"author\":{\"name\":\"Milan Stanojevic\",\"@id\":\"https:\\\/\\\/windowsreport.com\\\/dk\\\/#\\\/schema\\\/person\\\/e3910b02e4592db47a0eb303765a3a25\"},\"headline\":\"Greatness Phishing Service spoof&#8217;er RingCentral for at stj\u00e6le Microsoft 365-konti\",\"datePublished\":\"2026-08-05T05:55:01+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/windowsreport.com\\\/dk\\\/greatness-phishing-service-spoofer-ringcentral-for-at-stjaele-microsoft-365-konti-3\\\/\"},\"wordCount\":580,\"commentCount\":0,\"image\":{\"@id\":\"https:\\\/\\\/windowsreport.com\\\/dk\\\/greatness-phishing-service-spoofer-ringcentral-for-at-stjaele-microsoft-365-konti-3\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/windowsreport.com\\\/dk\\\/wp-content\\\/uploads\\\/sites\\\/12\\\/2026\\\/08\\\/tycoon2fa-microsoft-365-4.jpg\",\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/windowsreport.com\\\/dk\\\/greatness-phishing-service-spoofer-ringcentral-for-at-stjaele-microsoft-365-konti-3\\\/#respond\"]}],\"copyrightYear\":\"2026\",\"copyrightHolder\":{\"@id\":\"https:\\\/\\\/windowsreport.com\\\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/windowsreport.com\\\/dk\\\/greatness-phishing-service-spoofer-ringcentral-for-at-stjaele-microsoft-365-konti-3\\\/\",\"url\":\"https:\\\/\\\/windowsreport.com\\\/dk\\\/greatness-phishing-service-spoofer-ringcentral-for-at-stjaele-microsoft-365-konti-3\\\/\",\"name\":\"Greatness Phishing Service spoof'er RingCentral for at stj\u00e6le Microsoft 365-konti - 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