Russia-Linked ‘Midnight Blizzard’ Group Hijacks Hotel Wi-Fi With CaptiveCrunch

A Russia-linked group tracked as Midnight Blizzard has compromised hotel and conference Wi-Fi portals worldwide, redirecting guests to phishing pages and fake software updates that steal credentials, session tokens, and other sensitive data. Microsoft says the campaign, dubbed CaptiveCrunch, “targets traveling employees generally rather than a particular sector,” reports iTNews. From the report: Midnight Blizzard, tracked internally by Microsoft under its earlier codename NOBELIUM, is attributed by the US and UK governments to Russia’s SVR (Sluzhba Vneshney Razvedki) foreign intelligence service. Microsoft’s technical analysis said compromises occurred in “several countries” without naming them, and it did not give a total number of affected venues, organisations or individuals.

A related investigation published earlier in July by security firm ReliaQuest, and which Microsoft cited in its report, found compromised captive portal gateways across multiple United States cities as well as in India and Saudi Arabia, mostly at hotels. ReliaQuest said the traffic it observed came from organizations across financial services, professional services, legal, health care, energy and retail, suggesting the campaign targets traveling employees generally rather than a particular sector.

[…] Where attackers gained a foothold, Microsoft said they deployed two main tools: CornFlake, a Windows remote access trojan (RAT) written in Go capable of keylogging, screenshot and webcam capture, audio surveillance and credential and session token theft. They would also drop ChocoShell, an in-memory PowerShell infostealer targeting browser cookies, saved passwords, Microsoft 365 single sign-on (SSO) tokens and wi-fi credentials. Microsoft also said it has seen indications the attackers might be targeting Android devices with similar prompts urging victims to download and install an APK file.