Incident Score: Analysis & Impact (HYA1768842036)
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Rankiteo Score Impact Analysis
Key Highlights From The Incident Analysis
- Timeline of Hyatt's Ransomware and lateral movement inside company's environment.
- Overview of affected data sets, including SSNs and PHI, and why they materially increase incident severity.
- How Rankiteo’s incident engine converts technical details into a normalized incident score.
- How this cyber incident impacts Hyatt Rankiteo cyber scoring and cyber rating.
- Rankiteo’s MITRE ATT&CK correlation analysis for this incident, with associated confidence level.
Full Incident Analysis Transcript
In this Rankiteo incident briefing, we review the Hyatt breach identified under incident ID HYA1768842036.
The analysis begins with a detailed overview of Hyatt's information like the linkedin page: https://www.linkedin.com/company/hyatt, the number of followers: 1560442, the industry type: Hospitality and the number of employees: 89774 employees
After the initial compromise, the video explains how Rankiteo's incident engine converts technical details into a normalized incident score. The incident score before the incident was 725 and after the incident was 619 with a difference of -106 which is could be a good indicator of the severity and impact of the incident.
In the next step of the video, we will analyze in more details the incident and the impact it had on Hyatt and their customers.
On 19 January 2025, Hyatt Hotels Corporation disclosed Ransomware issues under the banner "Hyatt Hotels Hit by NightSpire Ransomware Attack: 48.5GB of Data Allegedly Stolen".
A newly emerged ransomware group, NightSpire, has claimed responsibility for a cyberattack on Hyatt Hotels Corporation, posting stolen data on the dark web after failed negotiations.
The disruption is felt across the environment, affecting Hyatt Place Chelsea in New York (potential lateral movement within Hyatt’s network), and exposing 48.5GB of sensitive information.
Formal response steps have not been shared publicly yet.
The case underscores how Ongoing.
Finally, we try to match the incident with the MITRE ATT&CK framework to see if there is any correlation between the incident and the MITRE ATT&CK framework.
The MITRE ATT&CK framework is a knowledge base of techniques and sub-techniques that are used to describe the tactics and procedures of cyber adversaries. It is a powerful tool for understanding the threat landscape and for developing effective defense strategies.
MITRE ATT&CK® Correlation Analysis
Rankiteo's analysis has identified several MITRE ATT&CK tactics and techniques associated with this incident, each with varying levels of confidence based on available evidence. Under the Initial Access tactic, the analysis identified Exploit Public-Facing Application (T1190) with moderate confidence (50%), supported by evidence indicating potential lateral movement within Hyatt’s network and Valid Accounts (T1078) with moderate to high confidence (70%), with evidence including employee credentials...exposed, and access to Hyatt’s internal CMS. Under the Execution tactic, the analysis identified User Execution: Malicious File (T1204.002) with moderate confidence (60%), supported by evidence indicating nightSpire ransomware group...encrypting victims’ data. Under the Credential Access tactic, the analysis identified OS Credential Dumping (T1003) with moderate to high confidence (80%), with evidence including employee credentials...exposed, and 48.5GB of sensitive information and Unsecured Credentials: Credentials In Files (T1552.001) with moderate to high confidence (70%), supported by evidence indicating internal documents, employee credentials...leaked. Under the Discovery tactic, the analysis identified Account Discovery (T1087) with moderate confidence (60%), supported by evidence indicating employee names, credentials...exposed and File and Directory Discovery (T1083) with moderate to high confidence (70%), supported by evidence indicating screenshots of expense reports, internal documents. Under the Collection tactic, the analysis identified Data from Local System (T1005) with high confidence (90%), supported by evidence indicating 48.5GB of sensitive information allegedly exfiltrated and Data from Network Shared Drive (T1039) with moderate to high confidence (70%), supported by evidence indicating internal documents, financial records...leaked. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with high confidence (90%), with evidence including 48.5GB of data allegedly stolen, and posted stolen data on the dark web and Exfiltration Over Web Service (T1567) with moderate to high confidence (70%), supported by evidence indicating public download link...used to pressure victims. Under the Impact tactic, the analysis identified Data Encrypted for Impact (T1486) with high confidence (90%), supported by evidence indicating nightSpire employs double-extortion tactic, encrypting victims’ data and Defacement (T1491) with moderate confidence (60%), supported by evidence indicating posted stolen data on the dark web after failed negotiations. Under the Defense Evasion tactic, the analysis identified Obfuscated Files or Information (T1027) with moderate confidence (60%), supported by evidence indicating nightSpire ransomware group...encrypting victims’ data and Hide Artifacts: Hidden Files and Directories (T1564.001) with moderate confidence (50%), supported by evidence indicating lateral movement within Hyatt’s network. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.
Sources & References
- Hyatt Rankiteo Cyber Incident Details: https://www.rankiteo.com/company/hyatt/incident/HYA1768842036
- Hyatt CyberSecurity Rating page: https://www.rankiteo.com/company/hyatt
- Hyatt Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/hya1768842036-hyatt-hotels-corporation-ransomware-january-2025/
- Hyatt CyberSecurity Score History: https://www.rankiteo.com/company/hyatt/history
- Hyatt CyberSecurity Incident Source: https://cybernews.com/security/hyatt-ransomware-nightspire-darkweb-leak/
- Rankiteo A.I CyberSecurity Rating methodology: https://www.rankiteo.com/Images/rankiteo_algo.pdf
- Rankiteo TPRM Scoring methodology: https://static.rankiteo.com/model/rankiteo_tprm_methodology.pdf