{"id":3927,"date":"2026-08-05T05:43:32","date_gmt":"2026-08-05T05:43:32","guid":{"rendered":"https:\/\/windowsreport.com\/se\/greatness-phishing-service-spoofar-ringcentral-for-att-stjala-microsoft-365-konton-2\/"},"modified":"2026-08-05T05:43:32","modified_gmt":"2026-08-05T05:43:32","slug":"greatness-phishing-service-spoofar-ringcentral-for-att-stjala-microsoft-365-konton-2","status":"publish","type":"post","link":"https:\/\/windowsreport.com\/se\/greatness-phishing-service-spoofar-ringcentral-for-att-stjala-microsoft-365-konton-2\/","title":{"rendered":"Greatness Phishing Service spoofar RingCentral f\u00f6r att stj\u00e4la Microsoft 365-konton"},"content":{"rendered":"\n

Greatness n\u00e4tfisketj\u00e4nst 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 som stal inloggningsuppgifter. Den har sedan dess utvecklats till en bredare plattform som kan f\u00e5nga autentiseringstoken och kringg\u00e5 vissa former av flerfaktorsautentisering.<\/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 ut\u00f6kats bortom Microsoft 365 f\u00f6r att st\u00f6dja attacker mot konton f\u00f6r iCloud, Yahoo och Google Workspace.<\/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 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\u00f6stmeddelanden eller varningar om medarbetares prestationsutv\u00e4rdering.<\/p>\n\n\n\n

Varje e-postmeddelande inneh\u00f6ll ett p\u00e5hittat meddelande som h\u00e4vdade att avs\u00e4ndaren hade godk\u00e4nts via organisationens lista \u00f6ver betrodda avs\u00e4ndare. Detta meddelande gjorde att e-postmeddelandena verkade 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\u00e4ppostf\u00f6rtroendeniv\u00e5 (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

Ett klick p\u00e5 den skadliga knappen omdirigerade offren till infrastruktur som kontrollerades av Greatness-operat\u00f6rer.<\/p>\n\n\n\n

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

Andra offer drogs in i en n\u00e4tfiskeprocess med enhetskod, som \u00f6vertalade dem att auktorisera en session som kontrollerades av angriparen 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 att de kunde logga in i komprometterade konton utan att genomf\u00f6ra ytterligare en standardinloggning.<\/p>\n\n\n\n

Angripare s\u00f6ker i 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 f\u00f6retagsinformation 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 en separat dataintr\u00e5ng som p\u00e5stods av hotgruppen ShinyHunters. F\u00f6retaget sade 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 en direkt koppling mellan incidenterna.<\/p>\n\n\n\n

Organisationer b\u00f6r granska e-postlistor med till\u00e5tna avs\u00e4ndare<\/h3>\n\n\n\n

S\u00e4kerhetsteam b\u00f6r granska listor \u00f6ver betrodda avs\u00e4ndare och e-postlistor med till\u00e5tna avs\u00e4ndare 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 inloggningar till Microsoft 365 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 uppdatera token. 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 malwarekampanj mot hotell-Wi-Fi<\/a> och begr\u00e4nsade livsl\u00e4ngden f\u00f6r NuGet API-nycklar till 30 dagar<\/a>.<\/p>\n\n\n\n

Skadlig kod har ocks\u00e5 hittat nya tekniker som kan stj\u00e4la Google-passnycklar<\/a>, vilket v\u00e4cker ytterligare farh\u00e5gor om s\u00e4kerheten i l\u00f6senordsfria autentiseringssystem.<\/p>\n\n\n\n

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

Greatness n\u00e4tfisketj\u00e4nst 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 som stal inloggningsuppgifter. Den har sedan dess utvecklats till en bredare plattform som kan f\u00e5nga autentiseringstoken och kringg\u00e5 vissa former av flerfaktorsautentisering. Kampanjerna har fr\u00e4mst riktat sig mot anv\u00e4ndare i […]<\/p>\n","protected":false},"author":49,"featured_media":3928,"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-3927","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-tokens 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-2\/\" \/>\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-tokens 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-2\/\" \/>\n<meta property=\"og:site_name\" content=\"WindowsReport SE (Swedish)\" \/>\n<meta property=\"article:published_time\" content=\"2026-08-05T05:43:32+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/windowsreport.com\/se\/wp-content\/uploads\/sites\/14\/2026\/08\/tycoon2fa-microsoft-365-2.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-2\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/windowsreport.com\\\/se\\\/greatness-phishing-service-spoofar-ringcentral-for-att-stjala-microsoft-365-konton-2\\\/\"},\"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\":\"2026-08-05T05:43:32+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/windowsreport.com\\\/se\\\/greatness-phishing-service-spoofar-ringcentral-for-att-stjala-microsoft-365-konton-2\\\/\"},\"wordCount\":644,\"commentCount\":0,\"image\":{\"@id\":\"https:\\\/\\\/windowsreport.com\\\/se\\\/greatness-phishing-service-spoofar-ringcentral-for-att-stjala-microsoft-365-konton-2\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/windowsreport.com\\\/se\\\/wp-content\\\/uploads\\\/sites\\\/14\\\/2026\\\/08\\\/tycoon2fa-microsoft-365-2.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-2\\\/#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-2\\\/\",\"url\":\"https:\\\/\\\/windowsreport.com\\\/se\\\/greatness-phishing-service-spoofar-ringcentral-for-att-stjala-microsoft-365-konton-2\\\/\",\"name\":\"Greatness Phishing Service spoofar RingCentral f\u00f6r att stj\u00e4la Microsoft 365-konton - 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