Incident Score: Analysis & Impact (THI1784903911)
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Rankiteo Score Impact Analysis
Key Highlights From The Incident Analysis
- Timeline of Thialf BV'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 Thialf BV 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 Thialf BV breach identified under incident ID THI1784903911.
The analysis begins with a detailed overview of Thialf BV's information like the linkedin page: https://www.linkedin.com/company/thialf-bv, the number of followers: 3568, the industry type: Spectator Sports and the number of employees: 37 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 758 and after the incident was 648 with a difference of -110 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 Thialf BV and their customers.
Thialf recently reported "Ransomware Attack on Thialf Ice Skating Stadium", a noteworthy cybersecurity incident.
The Thialf ice skating stadium in Heerenveen, Netherlands, has been hit by a ransomware attack, with cybercriminals demanding payment in exchange for restoring access to its systems and preventing the release of stolen data.
The disruption is felt across the environment, and exposing Internal documents, employee information, financial contracts, and other sensitive data.
In response, and stakeholders are being briefed through Declined to provide further details citing ongoing discussions with attackers.
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 highly skilled cybercriminal group proficient in network infiltration and Valid Accounts (T1078) with moderate confidence (60%), supported by evidence indicating the Gentlemen groups proficiency in system lockdowns. Under the Execution tactic, the analysis identified User Execution: Malicious File (T1204.002) with moderate to high confidence (70%), supported by evidence indicating ransomware attack threatening organizations existence. Under the Persistence tactic, the analysis identified Valid Accounts (T1078) with moderate confidence (60%), supported by evidence indicating system lockdowns by The Gentlemen group. Under the Privilege Escalation tactic, the analysis identified Valid Accounts (T1078) with moderate confidence (60%), supported by evidence indicating proficiency in network infiltration and system lockdowns. Under the Defense Evasion tactic, the analysis identified Execution Guardrails (T1480) with moderate confidence (50%), supported by evidence indicating highly skilled group with advanced infiltration techniques and Indicator Removal (T1070) with moderate confidence (50%), supported by evidence indicating ongoing discussions with attackers, limited details disclosed. Under the Credential Access tactic, the analysis identified OS Credential Dumping (T1003) with moderate confidence (60%), supported by evidence indicating employee information and internal documents exfiltrated. Under the Discovery tactic, the analysis identified File and Directory Discovery (T1083) with moderate to high confidence (70%), supported by evidence indicating internal documents, financial contracts, and sensitive data exfiltrated. Under the Collection tactic, the analysis identified Data from Local System (T1005) with moderate to high confidence (80%), supported by evidence indicating internal documents, employee information, financial contracts compromised. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with high confidence (90%), supported by evidence indicating hackers claim to have exfiltrated internal documents and sensitive data. Under the Impact tactic, the analysis identified Data Encrypted for Impact (T1486) with high confidence (90%), supported by evidence indicating ransomware attack with data encryption and exfiltration and Service Stop (T1489) with moderate to high confidence (70%), supported by evidence indicating system lockdowns and ransomware demanding payment for access. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.
Sources & References
- Thialf BV Rankiteo Cyber Incident Details: https://www.rankiteo.com/company/thialf-bv/incident/THI1784903911
- Thialf BV CyberSecurity Rating page: https://www.rankiteo.com/company/thialf-bv
- Thialf BV Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/thi1784903911-thialf-ransomware-june-2026/
- Thialf BV CyberSecurity Score History: https://www.rankiteo.com/company/thialf-bv/history
- Thialf BV CyberSecurity Incident Source: https://nltimes.nl/2026/07/24/thialf-ice-skating-stadium-hit-ransomware-attack
- 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