{"id":3923,"date":"2026-08-05T05:39:53","date_gmt":"2026-08-05T05:39:53","guid":{"rendered":"https:\/\/windowsreport.com\/se\/greatness-natfisketjanst-spoofar-ringcentral-for-att-stjala-microsoft-365-konton\/"},"modified":"2026-08-05T05:39:53","modified_gmt":"2026-08-05T05:39:53","slug":"greatness-natfisketjanst-spoofar-ringcentral-for-att-stjala-microsoft-365-konton","status":"publish","type":"post","link":"https:\/\/windowsreport.com\/se\/greatness-natfisketjanst-spoofar-ringcentral-for-att-stjala-microsoft-365-konton\/","title":{"rendered":"Greatness n\u00e4tfisketj\u00e4nst 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 via adversary-in-the-middle- och device-code-attacker.<\/p>\n\n\n\n

Greatness fungerade till en b\u00f6rjan 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 riktats 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 att vara RingCentral-aviseringar<\/h2>\n\n\n\n

ZeroBEC-forskare<\/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 s\u00e5g ut som r\u00f6stmeddelandeaviseringar eller varningar om medarbetarsamtal.<\/p>\n\n\n\n

Varje e-postmeddelande inneh\u00f6ll ett p\u00e5hittat meddelande som h\u00e4vdade att avs\u00e4ndaren hade f\u00e5tt godk\u00e4nnande via organisationens lista \u00f6ver s\u00e4kra 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 skr\u00e4ppostkonfidensniv\u00e5 (SCL) p\u00e5 -1. Den klassificeringen gjorde att e-postmeddelandena kunde undvika normal skr\u00e4ppostfiltrering.<\/p>\n\n\n\n

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

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

Andra offer gick igenom en device-code-n\u00e4tfiskeprocess, som \u00f6vertalade dem att godk\u00e4nna 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 g\u00e5 in i 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-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 sade att incidenten p\u00e5verkade information som tillh\u00f6rde ett begr\u00e4nsat antal kunder och att de kontaktades 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 ett direkt samband 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 s\u00e4kra 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 ett intr\u00e5ng b\u00f6r de omedelbart \u00e5terkalla aktiv \u00e5tkomst och uppdateringstoken. De b\u00f6r ocks\u00e5 granska OAuth-beh\u00f6righeter, Microsoft Graph-aktivitet, registrerade program och \u00e5tkomst \u00f6ver Microsoft 365-tj\u00e4nster.<\/p>\n\n\n\n

I andra s\u00e4kerhetsnyheter avsl\u00f6jade Microsoft en global skadeprogramskampanj 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-passnycklar<\/a>, vilket v\u00e4cker ytterligare oro kring s\u00e4kerheten i l\u00f6senordsl\u00f6sa 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 via adversary-in-the-middle- och device-code-attacker. Greatness fungerade till en b\u00f6rjan 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 riktats mot […]<\/p>\n","protected":false},"author":49,"featured_media":3924,"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-3923","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"acf":[],"yoast_head":"\nGreatness n\u00e4tfisketj\u00e4nst spoofar RingCentral f\u00f6r att stj\u00e4la Microsoft 365-konton - WindowsReport SE (Swedish)<\/title>\n<meta name=\"description\" content=\"Greatness-attack\u00f6rerna spoofar RingCentral-aviseringar f\u00f6r att stj\u00e4la Microsoft 365-token via AiTM- och device-code phishing-attacker.\" \/>\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-natfisketjanst-spoofar-ringcentral-for-att-stjala-microsoft-365-konton\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Greatness n\u00e4tfisketj\u00e4nst spoofar RingCentral f\u00f6r att stj\u00e4la Microsoft 365-konton\" \/>\n<meta property=\"og:description\" content=\"Greatness-attack\u00f6rerna spoofar RingCentral-aviseringar f\u00f6r att stj\u00e4la Microsoft 365-token via AiTM- och device-code phishing-attacker.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/windowsreport.com\/se\/greatness-natfisketjanst-spoofar-ringcentral-for-att-stjala-microsoft-365-konton\/\" \/>\n<meta property=\"og:site_name\" content=\"WindowsReport SE (Swedish)\" \/>\n<meta property=\"article:published_time\" content=\"2026-08-05T05:39:53+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/windowsreport.com\/se\/wp-content\/uploads\/sites\/14\/2026\/08\/tycoon2fa-microsoft-365.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-natfisketjanst-spoofar-ringcentral-for-att-stjala-microsoft-365-konton\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/windowsreport.com\\\/se\\\/greatness-natfisketjanst-spoofar-ringcentral-for-att-stjala-microsoft-365-konton\\\/\"},\"author\":{\"name\":\"Milan Stanojevic\",\"@id\":\"https:\\\/\\\/windowsreport.com\\\/se\\\/#\\\/schema\\\/person\\\/e3910b02e4592db47a0eb303765a3a25\"},\"headline\":\"Greatness n\u00e4tfisketj\u00e4nst spoofar RingCentral f\u00f6r att stj\u00e4la Microsoft 365-konton\",\"datePublished\":\"2026-08-05T05:39:53+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/windowsreport.com\\\/se\\\/greatness-natfisketjanst-spoofar-ringcentral-for-att-stjala-microsoft-365-konton\\\/\"},\"wordCount\":630,\"commentCount\":0,\"image\":{\"@id\":\"https:\\\/\\\/windowsreport.com\\\/se\\\/greatness-natfisketjanst-spoofar-ringcentral-for-att-stjala-microsoft-365-konton\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/windowsreport.com\\\/se\\\/wp-content\\\/uploads\\\/sites\\\/14\\\/2026\\\/08\\\/tycoon2fa-microsoft-365.jpg\",\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/windowsreport.com\\\/se\\\/greatness-natfisketjanst-spoofar-ringcentral-for-att-stjala-microsoft-365-konton\\\/#respond\"]}],\"copyrightYear\":\"2026\",\"copyrightHolder\":{\"@id\":\"https:\\\/\\\/windowsreport.com\\\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/windowsreport.com\\\/se\\\/greatness-natfisketjanst-spoofar-ringcentral-for-att-stjala-microsoft-365-konton\\\/\",\"url\":\"https:\\\/\\\/windowsreport.com\\\/se\\\/greatness-natfisketjanst-spoofar-ringcentral-for-att-stjala-microsoft-365-konton\\\/\",\"name\":\"Greatness n\u00e4tfisketj\u00e4nst spoofar RingCentral f\u00f6r att stj\u00e4la Microsoft 365-konton - 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