Crook hawks millions of records allegedly plundered from corporate Azure tenants

A cybercrook claims to have siphoned millions of employee records from the Microsoft Azure environments of major companies including McDonald's, Vodafone, Kyndryl, and Tata Consultancy Services. The alleged haul spans nine organizations and is being advertised for sale by a threat actor using the name "TheHatman," according to research published by Hudson Rock. McDonald's accounts for the largest alleged dataset on TheHatman's shopping list, with 1.7 million records purportedly up for grabs. Another 800,000 records supposedly come from Tata Consultancy Services, 425,000 from Vodafone, and 250,000 from HCL Technologies, with IHG Hotels & Resorts, Kyndryl, Gap, Hexaware Technologies, and Wyndham Hotels & Resorts rounding out the haul. Hudson Rock assessed the data as "highly likely authentic," citing corporate email addresses and structures consistent with exports from Microsoft Azure directory services. The records allegedly contain considerably more than names and work email addresses. Samples reviewed by the security shop reportedly include phone numbers, physical addresses, employee IDs, job titles, departments, office locations, reporting structures, group memberships, and service account details. Some records also reportedly identify accounts with Global Administrator privileges, potentially handing attackers a useful map of whom to target next. Even if the passwords aren't included, knowing who holds the keys to the kingdom makes for a handy phishing shortlist. How TheHatman allegedly obtained the information remains unclear. The attacker claims to have used compromised credentials, but Hudson Rock could not independently establish the initial access vector. It floated several possibilities, including credentials or session cookies stolen by infostealer malware, phishing, weak or absent multifactor authentication, and overly permissive third-party applications. Hudson Rock said its infostealer database contained compromised Microsoft cloud credentials associated with most of the named companies, although it could not link those credentials to TheHatman's alleged access. "Judging by the massive size of the organizations impacted, it appears highly likely that this campaign originates from targeted exploitation of Infostealer infections rather than a systemic zero-day vulnerability in Azure," said Hudson Rock. "If this were a widespread vulnerability, we would likely see a much broader spectrum of organizations impacted, including smaller businesses, rather than just these massive Fortune 500-level enterprises." The Register contacted all the organizations named by Hudson Rock to ask whether they were breached, whether the advertised data is authentic, and how any unauthorized access occurred. We've also asked Microsoft whether it is aware of a wider campaign targeting Azure or Entra customers. Tata Services sent The Register the statement it made to India's stock exchange [PDF] saying that the Company has received threat-intelligence alerts alleging possible exposure of certain employee information." It added: The Company has investigated the matter and has not found any credible evidence of a breach of TCS systems or customer environments. The information referenced appears to be more than four years old and limited to basic employee information. There is no indication that customer data, customer systems, or TCS operational systems have been impacted. The attacker claims to have used password spray and Multi-Factor Authentication (MFA) fatigue as the attack vector. The Company has had strong safeguards in place against such techniques for more than two years. Based on the current review, these controls remain effective, and the Company continues to monitor the environment closely." It said: The Company will continue to assess any new information that becomes available and take appropriate action, if required. The Company remains committed to maintaining the security and resilience of its systems and to protecting the information entrusted to us." TheHatman claims to have the data. How it might have walked out of nine corporate directories is the part nobody has explained yet. (R)