{"id":3937,"date":"2026-08-05T05:59:58","date_gmt":"2026-08-05T05:59:58","guid":{"rendered":"https:\/\/windowsreport.com\/se\/greatness-phishing-service-spoofar-ringcentral-for-att-stjala-microsoft-365-konton-7\/"},"modified":"2026-08-05T05:59:58","modified_gmt":"2026-08-05T05:59:58","slug":"greatness-phishing-service-spoofar-ringcentral-for-att-stjala-microsoft-365-konton-7","status":"publish","type":"post","link":"https:\/\/windowsreport.com\/se\/greatness-phishing-service-spoofar-ringcentral-for-att-stjala-microsoft-365-konton-7\/","title":{"rendered":"Greatness Phishing Service spoofar RingCentral f\u00f6r att stj\u00e4la Microsoft 365-konton"},"content":{"rendered":"\n

Phishingtj\u00e4nsten Greatness utger sig nu f\u00f6r att vara RingCentral f\u00f6r att stj\u00e4la Microsoft 365-konton genom adversary-in-the-middle- och enhetskodattacker.<\/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 autentiseringstoken och kringg\u00e5 vissa former av multifaktorautentisering.<\/p>\n\n\n\n

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

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

Forskare fr\u00e5n ZeroBEC<\/a> observerade att Greatness-operat\u00f6rer utnyttjar 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 framstod som r\u00f6stbrevl\u00e5deaviseringar eller varningar om medarbetares prestationsgranskningar.<\/p>\n\n\n\n

Varje e-postmeddelande inneh\u00f6ll ett fabricerat meddelande om att avs\u00e4ndaren hade f\u00e5tt godk\u00e4nnande genom organisationens lista \u00f6ver betrodda avs\u00e4ndare. Detta meddelande gjorde att e-postmeddelandena framstod som 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 skr\u00e4ppostkonfidensniv\u00e5 p\u00e5 -1. Den klassificeringen gjorde att e-postmeddelandena kunde undg\u00e5 normal filtrering av skr\u00e4ppost.<\/p>\n\n\n\n

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

Att klicka p\u00e5 den skadliga knappen omdirigerade offren till infrastruktur som kontrolleras av Greatness-operat\u00f6rer.<\/p>\n\n\n\n

Vissa offer n\u00e5dde en Microsoft adversary-in-the-middle-n\u00e4tfiskesida. Sidan f\u00e5ngade autentiseringstoken efter att anv\u00e4ndaren hade slutf\u00f6rt en MFA-beg\u00e4ran.<\/p>\n\n\n\n

Andra offer genomgick en n\u00e4tfiskeprocess med enhetskod, 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 komma \u00e5t komprometterade konton utan att genomf\u00f6ra en ny standardinloggning.<\/p>\n\n\n\n

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

Angriparna s\u00f6kte i Outlook-postl\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 p\u00e5st\u00e5s ha utf\u00f6rts av hotgruppen ShinyHunters. F\u00f6retaget uppgav att incidenten p\u00e5verkade information som tillh\u00f6rde ett begr\u00e4nsat antal kunder och att de kontaktade dem direkt.<\/p>\n\n\n\n

ZeroBEC tror att Greatness-anv\u00e4ndare kan ha f\u00e5tt 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-postgodk\u00e4nnandelistor<\/h3>\n\n\n\n

S\u00e4kerhetsteam b\u00f6r granska listor \u00f6ver betrodda avs\u00e4ndare och e-postgodk\u00e4nnandelistor f\u00f6r alltf\u00f6r breda undantag. Organisationer b\u00f6r ers\u00e4tta generella dom\u00e4nundantag med regler som \u00e4ven 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 v\u00e4rdleverant\u00f6rer, 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 program och \u00e5tkomst till Microsoft 365-tj\u00e4nster.<\/p>\n\n\n\n

I andra s\u00e4kerhetsnyheter har Microsoft avsl\u00f6jat en global skadlig kod-kampanj mot hotell-Wi-Fi<\/a> och begr\u00e4nsat 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-l\u00f6senord<\/a>, vilket v\u00e4cker ytterligare fr\u00e5gor om s\u00e4kerheten f\u00f6r l\u00f6senordsfria autentiseringssystem.<\/p>\n\n\n\n

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

Phishingtj\u00e4nsten Greatness utger sig nu f\u00f6r att vara RingCentral f\u00f6r att stj\u00e4la Microsoft 365-konton genom adversary-in-the-middle- och enhetskodattacker. 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 autentiseringstoken och kringg\u00e5 vissa former av multifaktorautentisering. Kampanjerna har fr\u00e4mst riktat sig mot anv\u00e4ndare […]<\/p>\n","protected":false},"author":49,"featured_media":3938,"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-3937","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-aviseringar f\u00f6r att stj\u00e4la Microsoft 365-token genom AiTM- och enhetskods-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-7\/\" \/>\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-aviseringar f\u00f6r att stj\u00e4la Microsoft 365-token genom AiTM- och enhetskods-phishingattacker\" \/>\n<meta property=\"og:url\" content=\"https:\/\/windowsreport.com\/se\/greatness-phishing-service-spoofar-ringcentral-for-att-stjala-microsoft-365-konton-7\/\" \/>\n<meta property=\"og:site_name\" content=\"WindowsReport SE (Swedish)\" \/>\n<meta property=\"article:published_time\" content=\"2026-08-05T05:59:58+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/windowsreport.com\/se\/wp-content\/uploads\/sites\/14\/2026\/08\/tycoon2fa-microsoft-365-7.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-7\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/windowsreport.com\\\/se\\\/greatness-phishing-service-spoofar-ringcentral-for-att-stjala-microsoft-365-konton-7\\\/\"},\"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\":\"2026-08-05T05:59:58+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/windowsreport.com\\\/se\\\/greatness-phishing-service-spoofar-ringcentral-for-att-stjala-microsoft-365-konton-7\\\/\"},\"wordCount\":629,\"commentCount\":0,\"image\":{\"@id\":\"https:\\\/\\\/windowsreport.com\\\/se\\\/greatness-phishing-service-spoofar-ringcentral-for-att-stjala-microsoft-365-konton-7\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/windowsreport.com\\\/se\\\/wp-content\\\/uploads\\\/sites\\\/14\\\/2026\\\/08\\\/tycoon2fa-microsoft-365-7.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-7\\\/#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-7\\\/\",\"url\":\"https:\\\/\\\/windowsreport.com\\\/se\\\/greatness-phishing-service-spoofar-ringcentral-for-att-stjala-microsoft-365-konton-7\\\/\",\"name\":\"Greatness Phishing Service spoofar RingCentral f\u00f6r att stj\u00e4la Microsoft 365-konton - 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