{"id":3929,"date":"2026-08-05T05:47:24","date_gmt":"2026-08-05T05:47:24","guid":{"rendered":"https:\/\/windowsreport.com\/se\/greatness-phishing-service-spoofar-ringcentral-for-att-stjala-microsoft-365-konton-3\/"},"modified":"2026-08-05T05:47:24","modified_gmt":"2026-08-05T05:47:24","slug":"greatness-phishing-service-spoofar-ringcentral-for-att-stjala-microsoft-365-konton-3","status":"publish","type":"post","link":"https:\/\/windowsreport.com\/se\/greatness-phishing-service-spoofar-ringcentral-for-att-stjala-microsoft-365-konton-3\/","title":{"rendered":"Greatness Phishing Service spoofar RingCentral f\u00f6r att stj\u00e4la Microsoft 365-konton"},"content":{"rendered":"\n

N\u00e4tfisketj\u00e4nsten Greatness utger sig nu f\u00f6r att vara RingCentral f\u00f6r att stj\u00e4la Microsoft 365-konton genom adversary-in-the-middle- och enhetskodsattacker.<\/p>\n\n\n\n

Greatness fungerade ursprungligen som en traditionell n\u00e4tfisketj\u00e4nst f\u00f6r st\u00f6ld av inloggningsuppgifter. Den har sedan dess utvecklats till en bredare plattform som kan f\u00e5nga upp autentiseringstoken och kringg\u00e5 vissa former av multifaktorautentisering.<\/p>\n\n\n\n

Kampanjerna har fr\u00e4mst riktats mot anv\u00e4ndare i USA, Kanada, Storbritannien, Australien och Sydafrika. Plattformen har ocks\u00e5 expanderat bortom Microsoft 365 f\u00f6r att st\u00f6dja attacker mot iCloud-, Yahoo- och Google Workspace-konton.<\/p>\n\n\n\n

Angripare utger sig f\u00f6r att vara RingCentral-aviseringar<\/h2>\n\n\n\n

ZeroBEC-forskare<\/a> observerade hur Greatness-operat\u00f6rer utnyttjade RingCentrals betrodda status f\u00f6r att kringg\u00e5 e-posts\u00e4kerhetsskydd.<\/p>\n\n\n\n

Angriparna f\u00f6rfalskade adressen service@ringcentral[.]com och skickade skadliga e-postmeddelanden till legitima RingCentral-kunder. Meddelandena s\u00e5g ut som r\u00f6stmeddelandeaviseringar eller varningar om medarbetarutv\u00e4rdering.<\/p>\n\n\n\n

Varje e-postmeddelande inneh\u00f6ll ett fabricerat meddelande om att avs\u00e4ndaren hade f\u00e5tt godk\u00e4nnande via organisationens lista \u00f6ver betrodda avs\u00e4ndare. Detta meddelande fick e-postmeddelandena att verka mer p\u00e5litliga och uppmuntrade mottagarna att klicka p\u00e5 en inb\u00e4ddad knapp.<\/p>\n\n\n\n

Enligt ZeroBEC tilldelade Microsoft Exchange meddelandena en Spam Confidence Level p\u00e5 -1. Den klassificeringen gjorde att e-postmeddelandena kunde undvika normal skr\u00e4ppostfiltrering.<\/p>\n\n\n\n

Greatness stj\u00e4l autentiseringstoken f\u00f6r Microsoft 365<\/h3>\n\n\n\n

Om man klickade p\u00e5 den skadliga knappen omdirigerades offren till infrastruktur som kontrolleras av Greatness-operat\u00f6rer.<\/p>\n\n\n\n

Vissa offer hamnade p\u00e5 en adversary-in-the-middle-n\u00e4tfiskesida fr\u00e5n Microsoft. Sidan f\u00e5ngade upp autentiseringstoken efter att anv\u00e4ndaren hade slutf\u00f6rt en MFA-beg\u00e4ran.<\/p>\n\n\n\n

Andra offer gick in i en enhetskods-n\u00e4tfiskeprocess, som \u00f6vertalade dem att auktorisera en angriparkontrollerad session via Microsofts legitima autentiseringssystem.<\/p>\n\n\n\n

Efter att ha f\u00e5tt \u00e5tkomst \u00e5teranv\u00e4nde angriparna stulna Microsoft 365-token via virtuella privata servrar och kommersiella VPN-tj\u00e4nster. Detta gjorde det m\u00f6jligt f\u00f6r dem att logga in p\u00e5 komprometterade konton utan att slutf\u00f6ra en ny standardinloggning.<\/p>\n\n\n\n

Angripare s\u00f6ker igenom e-post, Teams-chattar och molnfiler<\/h3>\n\n\n\n

Angriparna s\u00f6kte igenom Outlook-brevl\u00e5dor och Microsoft Teams-konversationer efter att ha komprometterat ett konto.<\/p>\n\n\n\n

De fick ocks\u00e5 \u00e5tkomst till SharePoint-webbplatser, OneDrive-filer, kontakter, kalendrar och registrerade program. Mycket av informationen samlades in via Microsoft Graph.<\/p>\n\n\n\n

I vissa fall f\u00f6rblev den obeh\u00f6riga \u00e5tkomsten aktiv i mer \u00e4n tv\u00e5 veckor, vilket gav angriparna tid att s\u00f6ka efter k\u00e4nslig aff\u00e4rsinformation och identifiera ytterligare m\u00e5l.<\/p>\n\n\n\n

Forskare unders\u00f6ker m\u00f6jlig koppling till RingCentral-intr\u00e5ng<\/h3>\n\n\n\n

RingCentral bekr\u00e4ftade nyligen ett separat dataintr\u00e5ng som hotgruppen ShinyHunters p\u00e5st\u00e5s ligga bakom. F\u00f6retaget uppgav att incidenten p\u00e5verkade information som tillh\u00f6rde ett begr\u00e4nsat antal kunder och att man kontaktade dem direkt.<\/p>\n\n\n\n

ZeroBEC tror att Greatness-anv\u00e4ndare kan ha f\u00e5tt tag p\u00e5 en lista \u00f6ver giltiga RingCentral-kunder fr\u00e5n det intr\u00e5nget. Forskarna kunde dock inte bekr\u00e4fta n\u00e5gon direkt koppling mellan incidenterna.<\/p>\n\n\n\n

Organisationer b\u00f6r granska e-posttill\u00e5telselistor<\/h3>\n\n\n\n

S\u00e4kerhetsteam b\u00f6r granska listor \u00f6ver betrodda avs\u00e4ndare och e-posttill\u00e5telselistor f\u00f6r alltf\u00f6r breda undantag. Organisationer b\u00f6r ers\u00e4tta generella dom\u00e4nundantag med regler som ocks\u00e5 kr\u00e4ver giltig SPF-, DKIM- och DMARC-autentisering.<\/p>\n\n\n\n

Administrat\u00f6rer b\u00f6r ocks\u00e5 unders\u00f6ka ovanliga MFA-godk\u00e4nda Microsoft 365-inloggningar fr\u00e5n webbhotell, virtuella privata servrar eller kommersiella VPN-adresser.<\/p>\n\n\n\n

N\u00e4r administrat\u00f6rer misst\u00e4nker en kompromettering b\u00f6r de omedelbart \u00e5terkalla aktiv \u00e5tkomst och uppdatera token. De b\u00f6r ocks\u00e5 granska OAuth-beh\u00f6righeter, Microsoft Graph-aktivitet, registrerade appar och \u00e5tkomst \u00f6ver Microsoft 365-tj\u00e4nster.<\/p>\n\n\n\n

I andra s\u00e4kerhetsnyheter avsl\u00f6jade Microsoft en global malwarekampanj mot hotell-Wi-Fi<\/a> och begr\u00e4nsade giltighetstiden f\u00f6r NuGet API-nycklar till 30 dagar<\/a>.<\/p>\n\n\n\n

Skadlig kod har ocks\u00e5 uppt\u00e4ckt nya tekniker som kan stj\u00e4la Google-passkeys<\/a>, vilket v\u00e4cker ytterligare oro kring s\u00e4kerheten i l\u00f6senordsfria autentiseringssystem.<\/p>\n\n\n\n

Via BleepingComputer<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

N\u00e4tfisketj\u00e4nsten Greatness utger sig nu f\u00f6r att vara RingCentral f\u00f6r att stj\u00e4la Microsoft 365-konton genom adversary-in-the-middle- och enhetskodsattacker. Greatness fungerade ursprungligen som en traditionell n\u00e4tfisketj\u00e4nst f\u00f6r st\u00f6ld av inloggningsuppgifter. Den har sedan dess utvecklats till en bredare plattform som kan f\u00e5nga upp autentiseringstoken och kringg\u00e5 vissa former av multifaktorautentisering. Kampanjerna har fr\u00e4mst riktats mot anv\u00e4ndare […]<\/p>\n","protected":false},"author":49,"featured_media":3930,"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-3929","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"acf":[],"yoast_head":"\nGreatness Phishing Service spoofar RingCentral f\u00f6r att stj\u00e4la Microsoft 365-konton - WindowsReport SE (Swedish)<\/title>\n<meta name=\"description\" content=\"Greatness-angripare spoofar RingCentral-varningar f\u00f6r att stj\u00e4la Microsoft 365-token genom AiTM- och enhetskod-phishingattacker.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/windowsreport.com\/se\/greatness-phishing-service-spoofar-ringcentral-for-att-stjala-microsoft-365-konton-3\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Greatness Phishing Service spoofar RingCentral f\u00f6r att stj\u00e4la Microsoft 365-konton\" \/>\n<meta property=\"og:description\" content=\"Greatness-angripare spoofar RingCentral-varningar f\u00f6r att stj\u00e4la Microsoft 365-token genom AiTM- och enhetskod-phishingattacker.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/windowsreport.com\/se\/greatness-phishing-service-spoofar-ringcentral-for-att-stjala-microsoft-365-konton-3\/\" \/>\n<meta property=\"og:site_name\" content=\"WindowsReport SE (Swedish)\" \/>\n<meta property=\"article:published_time\" content=\"2026-08-05T05:47:24+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/windowsreport.com\/se\/wp-content\/uploads\/sites\/14\/2026\/08\/tycoon2fa-microsoft-365-3.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\\\/se\\\/greatness-phishing-service-spoofar-ringcentral-for-att-stjala-microsoft-365-konton-3\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/windowsreport.com\\\/se\\\/greatness-phishing-service-spoofar-ringcentral-for-att-stjala-microsoft-365-konton-3\\\/\"},\"author\":{\"name\":\"Milan Stanojevic\",\"@id\":\"https:\\\/\\\/windowsreport.com\\\/se\\\/#\\\/schema\\\/person\\\/e3910b02e4592db47a0eb303765a3a25\"},\"headline\":\"Greatness Phishing Service spoofar RingCentral f\u00f6r att stj\u00e4la Microsoft 365-konton\",\"datePublished\":\"2026-08-05T05:47:24+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/windowsreport.com\\\/se\\\/greatness-phishing-service-spoofar-ringcentral-for-att-stjala-microsoft-365-konton-3\\\/\"},\"wordCount\":630,\"commentCount\":0,\"image\":{\"@id\":\"https:\\\/\\\/windowsreport.com\\\/se\\\/greatness-phishing-service-spoofar-ringcentral-for-att-stjala-microsoft-365-konton-3\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/windowsreport.com\\\/se\\\/wp-content\\\/uploads\\\/sites\\\/14\\\/2026\\\/08\\\/tycoon2fa-microsoft-365-3.jpg\",\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/windowsreport.com\\\/se\\\/greatness-phishing-service-spoofar-ringcentral-for-att-stjala-microsoft-365-konton-3\\\/#respond\"]}],\"copyrightYear\":\"2026\",\"copyrightHolder\":{\"@id\":\"https:\\\/\\\/windowsreport.com\\\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/windowsreport.com\\\/se\\\/greatness-phishing-service-spoofar-ringcentral-for-att-stjala-microsoft-365-konton-3\\\/\",\"url\":\"https:\\\/\\\/windowsreport.com\\\/se\\\/greatness-phishing-service-spoofar-ringcentral-for-att-stjala-microsoft-365-konton-3\\\/\",\"name\":\"Greatness Phishing Service spoofar RingCentral f\u00f6r att stj\u00e4la Microsoft 365-konton - 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