bleeping-computer Aug 4, 2026 · Crawled Aug 4, 2026

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

3 IoCs 2 Actors

AI Summary

Microsoft has identified a global campaign dubbed CaptiveCrunch, attributed to the Russian threat actor Midnight Blizzard (also known as APT29 or Storm-2945), targeting hotel and conference center Wi-Fi networks. The attackers manipulate DNS settings on captive portal equipment to redirect users to phishing pages impersonating Microsoft 365 login portals or abusing Microsoft Entra ID device code authentication flows. They also deploy custom malware, including the Go-based RAT CornFlake and the PowerShell-based ChocoShell, to steal credentials, session tokens, and conduct surveillance. A previously undisclosed tactic involves fake OS and browser update prompts (ClickFix) delivering malware to Windows and Android devices.

AI-extracted · verify before operational use

Extracted Entities 2 found

Threat Actor UNC2452 → Threat Actor APT29 →

Indicators of Compromise 3 extracted

Type	Value	Detail
Domain	ClickFix	Details →
Filename	Cloud Sync Service	Details →
Filename	FruitStone	Details →

MITRE ATT&CK TTPs 32 techniques

T1003 OS Credential Dumping · Credential Access T1021.001 Remote Desktop Protocol · Lateral Movement T1027 Obfuscated Files or Information · Defense Evasion T1036 Masquerading · Defense Evasion T1036.005 Match Legitimate Name or Location · Defense Evasion T1053.005 Scheduled Task · Execution T1055 Process Injection · Defense Evasion T1055.001 Dynamic-link Library Injection · Defense Evasion T1056.001 Keylogging · Collection T1059.001 PowerShell · Execution T1059.003 Windows Command Shell · Execution T1070.004 File Deletion · Defense Evasion T1071.001 Web Protocols · Command And Control T1078 Valid Accounts · Defense Evasion T1082 System Information Discovery · Discovery T1083 File and Directory Discovery · Discovery T1090 Proxy · Command And Control T1098 Account Manipulation · Persistence T1105 Ingress Tool Transfer · Command And Control T1110 Brute Force · Credential Access T1114 Email Collection · Collection T1133 External Remote Services · Persistence T1136.001 Local Account · Persistence T1185 Browser Session Hijacking · Collection T1204.002 Malicious File · Execution T1555 Credentials from Password Stores · Credential Access T1558 Steal or Forge Kerberos Tickets · Credential Access T1566 Phishing · Initial Access T1566.001 Spearphishing Attachment · Initial Access T1570 Lateral Tool Transfer · Lateral Movement T1586 Compromise Accounts · Resource Development T1588 Obtain Capabilities · Resource Development