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Hotel Wi-Fi attacks use custom malware to breach Microsoft 365 accounts

August 4, 2026 · BleepingComputer · Severity: HIGH

Microsoft attributed a global campaign targeting hospitality Wi-Fi networks to the Russian threat actor Midnight Blizzard, also known as APT29. The attacks employ custom malware to compromise Microsoft 365 accounts.

Key Takeaways

  • Microsoft identified Midnight Blizzard behind global hotel Wi-Fi attacks.
  • Campaign uses custom malware to breach Microsoft 365 accounts.
  • Hospitality networks targeted in a sophisticated espionage campaign.
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