Incident Score: Analysis & Impact (SUNHOS1780482743)
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Rankiteo Score Impact Analysis
Key Highlights From The Incident Analysis
- Timeline of Sunweb Group's Breach 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 Sunweb Group 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 Sunweb Group breach identified under incident ID SUNHOS1780482743.
The analysis begins with a detailed overview of Sunweb Group's information like the linkedin page: https://www.linkedin.com/company/sunweb-group, the number of followers: 24608, the industry type: Travel Arrangements and the number of employees: 677 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 705 and after the incident was 630 with a difference of -75 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 Sunweb Group and their customers.
Hospecs recently reported "Large-Scale Data Breach Hits Hundreds of Dutch Hotels, Exposing Guest Reservations", a noteworthy cybersecurity incident.
A major data breach has compromised the reservation systems of at least 100 Dutch hotels, exposing sensitive guest information and enabling targeted phishing attacks.
The disruption is felt across the environment, affecting Hotel reservation systems, and exposing Guest reservation details (contact information, arrival/departure dates), with nearly Thousands records at risk.
In response, and stakeholders are being briefed through LinkedIn alert by Hospecs Managing Director.
The case underscores how Ongoing, with advisories going out to stakeholders covering Guests warned about fraudulent payment requests.
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 Supply Chain Compromise (T1195) with high confidence (90%), supported by evidence indicating hospecs suspects a vulnerability in a shared software provider and Exploit Public-Facing Application (T1190) with moderate to high confidence (70%), supported by evidence indicating attack vector such as Vulnerability in shared software provider. Under the Credential Access tactic, the analysis identified Steal Application Access Token (T1528) with moderate confidence (60%), supported by evidence indicating hackers accessed booking details; shared software provider suspected. Under the Collection tactic, the analysis identified Data from Information Repositories (T1213) with high confidence (90%), supported by evidence indicating guest reservation details (contact info, arrival/departure dates) compromised. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with moderate to high confidence (80%), supported by evidence indicating data exfiltration such as Yes (used for phishing scams). Under the Impact tactic, the analysis identified Phishing: Spearphishing Link (T1566.002) with high confidence (90%), supported by evidence indicating attackers send convincing fake payment requests referencing real booking details and Defacement (T1491) with moderate confidence (50%), supported by evidence indicating hotels initially denied the breach despite evidence of fraud. Under the Defense Evasion tactic, the analysis identified Impair Defenses: Disable or Modify Tools (T1562.001) with moderate confidence (60%), supported by evidence indicating unclear if 72-hour breach reporting requirement was met. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.
Sources & References
- Sunweb Group Rankiteo Cyber Incident Details: https://www.rankiteo.com/company/sunweb-group/incident/SUNHOS1780482743
- Sunweb Group CyberSecurity Rating page: https://www.rankiteo.com/company/sunweb-group
- Sunweb Group Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/sunhos1780482743-sunweb-hospecs-breach-may-2026/
- Sunweb Group CyberSecurity Score History: https://www.rankiteo.com/company/sunweb-group/history
- Sunweb Group CyberSecurity Incident Source: https://www.techzine.eu/news/security/141806/dozens-of-dutch-hotels-affected-by-data-breach/
- 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