{"id":817,"date":"2026-08-04T11:08:59","date_gmt":"2026-08-04T11:08:59","guid":{"rendered":"https:\/\/windowsreport.com\/dk\/microsoft-afslorer-global-hotel-wi-fi-malwarekampagne-5\/"},"modified":"2026-08-04T11:08:59","modified_gmt":"2026-08-04T11:08:59","slug":"microsoft-afslorer-global-hotel-wi-fi-malwarekampagne-5","status":"publish","type":"post","link":"https:\/\/windowsreport.com\/dk\/microsoft-afslorer-global-hotel-wi-fi-malwarekampagne-5\/","title":{"rendered":"Microsoft afsl\u00f8rer global hotel-Wi-Fi-malwarekampagne"},"content":{"rendered":"\n

Microsoft oplyser, at Midnight Blizzard m\u00e5lretter hotel- og konference-Wi-Fi-netv\u00e6rk verden over for at stj\u00e6le legitimationsoplysninger og levere malware til rejsende.<\/p>\n\n\n\n

Den russiske statssponsorerede hackergruppe, ogs\u00e5 kendt som APT29, driver angiveligt kampagnen gennem Storm-2945, en af dens tilknyttede undergrupper.<\/p>\n\n\n\n

Microsoft sporer aktiviteten som CaptiveCrunch<\/a> og vurderer, at kampagnen har v\u00e6ret i gang siden mindst maj 2026.<\/p>\n\n\n\n

Angribere kompromitterer captive portal-trafik<\/h2>\n\n\n\n

Angriberne m\u00e5lretter netv\u00e6rk i hotel- og konferencebranchen, der bruger captive portaler, som normalt beder g\u00e6ster om at logge ind eller acceptere vilk\u00e5r, f\u00f8r de f\u00e5r adgang til internettet.<\/p>\n\n\n\n

Midnight Blizzard manipulerer DNS- og HTTP-trafik for at omdirigere tilsluttede enheder til ondsindede websteder. Microsoft fandt tegn p\u00e5, at angriberne muligvis har kompromitteret delt netv\u00e6rksinfrastruktur frem for individuelle routere eller adgangspunkter.<\/p>\n\n\n\n

Virksomheden har ikke fastsl\u00e5et, hvordan angriberne oprindeligt fik adgang til de ber\u00f8rte netv\u00e6rk.<\/p>\n\n\n\n

Hotelnetv\u00e6rk har tidligere v\u00e6ret udsat for lignende trusler. Angribere har f\u00f8r kapret hotel-Wi-Fi for at stj\u00e6le Microsoft 365-konti, og Microsoft advarede for nylig om phishing-angreb rettet mod hoteller i Japan.<\/p>\n\n\n\n

Falske Microsoft 365-sider stj\u00e6ler legitimationsoplysninger<\/h3>\n\n\n\n

Ofre, der opretter forbindelse til kompromitteret Wi-Fi, kan havne p\u00e5 falske Microsoft 365-loginsider, der indsamler brugernavne og adgangskoder.<\/p>\n\n\n\n

Angriberne bruger ogs\u00e5 enhedskode-phishing til at misbruge Microsoft Entra ID-godkendelse. Denne metode overtaler brugere til at indtaste en legitimt udseende enhedskode, der giver angriberne adgang til deres konti.<\/p>\n\n\n\n

Microsoft observerede, at angriberne aktivt brugte disse omdirigeringsmetoder fra juli og frem.<\/p>\n\n\n\n

Falske opdateringer installerer CornFlake-malware<\/h3>\n\n\n\n

Nogle ofre ser falske browser- eller Windows Update-sider i stedet for almindelige phishing-formularer.<\/p>\n\n\n\n

Disse sider bruger ClickFix-lignende instruktioner, der overtaler brugere til at kopiere kommandoer, starte installationsprogrammer eller k\u00f8re ondsindede filer. Microsoft fandt ogs\u00e5 tegn p\u00e5, at angriberne m\u00e5lrettede Android-enheder med ondsindede APK-pakker.<\/p>\n\n\n\n

En af de prim\u00e6re nyttelaster er CornFlake, en Go-baseret fjernadgangs-trojaner designet til at opretholde langsigtet adgang til Windows-computere.<\/p>\n\n\n\n

CornFlake kan udf\u00f8re fjernkommandoer, optage tastetryk, overv\u00e5ge udklipsholderaktivitet, tage sk\u00e6rmbilleder, stj\u00e6le filer, aktivere mikrofonen og webkameraet, udtr\u00e6kke browseradgangskoder og cookies, stj\u00e6le Microsoft 365-sessions-tokens, overv\u00e5ge tilsluttede USB-enheder og indsamle detaljerede systemoplysninger.<\/p>\n\n\n\n

Under installationen viser CornFlake et falsk statusvindue, mens den kopierer sig selv til %AppData%-mappen. Den udgiver sig for at v\u00e6re en legitim Windows-komponent kaldet Cloud Sync Service.<\/p>\n\n\n\n

CornFlake bruger flere vedholdenhedsmetoder<\/h3>\n\n\n\n

CornFlake kan registrere sig selv som en Windows-tjeneste for at k\u00f8re automatisk.<\/p>\n\n\n\n

Den kan ogs\u00e5 oprette startposter i registreringsdatabasen, planlagte opgaver og en overv\u00e5gningsproces. Overv\u00e5gningsprocessen gendanner andre vedholdenhedsmekanismer, n\u00e5r sikkerhedsteams fjerner en af dem.<\/p>\n\n\n\n

Denne tilgang g\u00f8r malwaren sv\u00e6rere at fjerne fuldst\u00e6ndigt fra en inficeret enhed.<\/p>\n\n\n\n

ChocoShell stj\u00e6ler browser- og Microsoft-legitimationsoplysninger<\/h3>\n\n\n\n

Microsoft identificerede ogs\u00e5 ChocoShell, en hukommelsesbaseret PowerShell-legitimationsstj\u00e6ler, der blev brugt under kampagnen.<\/p>\n\n\n\n

ChocoShell m\u00e5lretter browsercookies, gemte browseradgangskoder, Microsoft 365-tokens, Azure AD-tokens og gemte Wi-Fi-legitimationsoplysninger.<\/p>\n\n\n\n

Fordi ChocoShell prim\u00e6rt k\u00f8rer i hukommelsen, efterlader den muligvis f\u00e6rre filer, som traditionelle sikkerhedsv\u00e6rkt\u00f8jer kan opdage.<\/p>\n\n\n\n

Angribere administrerer ofre gennem FruitStone<\/h3>\n\n\n\n

Microsoft opdagede et eksponeret angriberkontrolpanel kaldet FruitStone.<\/p>\n\n\n\n

Panelet gjorde det muligt for operat\u00f8rer at administrere inficerede systemer, gennemse filer, k\u00f8re PowerShell-kommandoer, indsamle sk\u00e6rmbilleder og gennemg\u00e5 optagede tastetryk.<\/p>\n\n\n\n

Microsoft fandt ogs\u00e5 omfattende kommentarer i malwarekoden. Kommentarerne tyder p\u00e5, at udviklerne muligvis har brugt AI-v\u00e6rkt\u00f8jer under oprettelsen eller \u00e6ndringen af dele af malwaren.<\/p>\n\n\n\n

S\u00e5dan kan rejsende beskytte deres enheder<\/h3>\n\n\n\n

Rejsende og organisationer b\u00f8r behandle hotel- og konference-Wi-Fi som up\u00e5lideligt, selv n\u00e5r netv\u00e6rket ser legitimt ud.<\/p>\n\n\n\n

Microsoft anbefaler f\u00f8lgende forholdsregler:<\/p>\n\n\n\n

    \n
  • Brug mobildata, et personligt hotspot eller en administreret virksomhedsforbindelse, n\u00e5r det er muligt.<\/li>\n\n\n\n
  • Undg\u00e5 at installere browseropdateringer, Windows-opdateringer eller sikkerhedsv\u00e6rkt\u00f8jer, der tilbydes via captive portal-sider.<\/li>\n\n\n\n
  • Brug adgangsn\u00f8gler eller andre phishing-resistente godkendelsesmetoder.<\/li>\n\n\n\n
  • Aktiv\u00e9r st\u00e6rk multifaktor-godkendelse til vigtige konti.<\/li>\n\n\n\n
  • Deaktiv\u00e9r Microsoft Entra-enhedskodegodkendelse, n\u00e5r organisationen ikke har brug for det.<\/li>\n\n\n\n
  • Undg\u00e5 at indtaste virksomhedslegitimationsoplysninger ved registrering til g\u00e6ste-Wi-Fi.<\/li>\n\n\n\n
  • Kontakt en administrator, n\u00e5r en captive portal beder brugere om at k\u00f8re kommandoer eller downloade software.<\/li>\n<\/ul>\n\n\n\n

    Inden for andre sikkerhedsnyheder n\u00e5ede Microsofts bug bounty-udbetalinger rekordh\u00f8je 20 millioner dollars.<\/p>\n","protected":false},"excerpt":{"rendered":"

    Microsoft oplyser, at Midnight Blizzard m\u00e5lretter hotel- og konference-Wi-Fi-netv\u00e6rk verden over for at stj\u00e6le legitimationsoplysninger og levere malware til rejsende. Den russiske statssponsorerede hackergruppe, ogs\u00e5 kendt som APT29, driver angiveligt kampagnen gennem Storm-2945, en af dens tilknyttede undergrupper. Microsoft sporer aktiviteten som CaptiveCrunch og vurderer, at kampagnen har v\u00e6ret i gang siden mindst maj 2026. […]<\/p>\n","protected":false},"author":49,"featured_media":818,"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-817","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"acf":[],"yoast_head":"\nMicrosoft afsl\u00f8rer global hotel-Wi-Fi-malwarekampagne - WindowsReport DK (Danish)<\/title>\n<meta name=\"description\" content=\"Microsoft siger, at Midnight Blizzard kaprer hotel-Wi-Fi for at stj\u00e6le Microsoft 365-legitimationsoplysninger og installere CornFlake-malware.\" \/>\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=\"Microsoft afsl\u00f8rer global hotel-Wi-Fi-malwarekampagne\" \/>\n<meta property=\"og:description\" content=\"Microsoft siger, at Midnight Blizzard kaprer hotel-Wi-Fi for at stj\u00e6le Microsoft 365-legitimationsoplysninger og installere CornFlake-malware.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/windowsreport.com\/dk\/microsoft-afslorer-global-hotel-wi-fi-malwarekampagne-5\/\" \/>\n<meta property=\"og:site_name\" content=\"WindowsReport DK (Danish)\" \/>\n<meta property=\"article:published_time\" content=\"2026-08-04T11:08:59+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/windowsreport.com\/dk\/wp-content\/uploads\/sites\/12\/2026\/08\/phishing-hotel-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\\\/microsoft-afslorer-global-hotel-wi-fi-malwarekampagne-5\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/windowsreport.com\\\/dk\\\/microsoft-afslorer-global-hotel-wi-fi-malwarekampagne-5\\\/\"},\"author\":{\"name\":\"Milan Stanojevic\",\"@id\":\"https:\\\/\\\/windowsreport.com\\\/dk\\\/#\\\/schema\\\/person\\\/e3910b02e4592db47a0eb303765a3a25\"},\"headline\":\"Microsoft afsl\u00f8rer global hotel-Wi-Fi-malwarekampagne\",\"datePublished\":\"2026-08-04T11:08:59+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/windowsreport.com\\\/dk\\\/microsoft-afslorer-global-hotel-wi-fi-malwarekampagne-5\\\/\"},\"wordCount\":679,\"commentCount\":0,\"image\":{\"@id\":\"https:\\\/\\\/windowsreport.com\\\/dk\\\/microsoft-afslorer-global-hotel-wi-fi-malwarekampagne-5\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/windowsreport.com\\\/dk\\\/wp-content\\\/uploads\\\/sites\\\/12\\\/2026\\\/08\\\/phishing-hotel-microsoft-365-4.jpg\",\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/windowsreport.com\\\/dk\\\/microsoft-afslorer-global-hotel-wi-fi-malwarekampagne-5\\\/#respond\"]}],\"copyrightYear\":\"2026\",\"copyrightHolder\":{\"@id\":\"https:\\\/\\\/windowsreport.com\\\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/windowsreport.com\\\/dk\\\/microsoft-afslorer-global-hotel-wi-fi-malwarekampagne-5\\\/\",\"url\":\"https:\\\/\\\/windowsreport.com\\\/dk\\\/microsoft-afslorer-global-hotel-wi-fi-malwarekampagne-5\\\/\",\"name\":\"Microsoft afsl\u00f8rer global hotel-Wi-Fi-malwarekampagne - 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