Incident Score: Analysis & Impact (CAS1788456710)
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Rankiteo Score Impact Analysis
Key Highlights From The Incident Analysis
- Timeline of Castle 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 Castle 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 Castle Group breach identified under incident ID CAS1788456710.
The analysis begins with a detailed overview of Castle Group's information like the linkedin page: https://www.linkedin.com/company/castle-group, the number of followers: 27111, the industry type: Real Estate and the number of employees: 1492 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 761 and after the incident was 611 with a difference of -150 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 Castle Group and their customers.
On 11 August 2026, Castle Group disclosed Data Breach issues under the banner "Castle Group Data Breach Exposes Sensitive Personal Information Across Multiple States".
Castle Management, the parent company of Castle Group, a property management firm serving residential communities in Florida, Texas, Colorado, Tennessee, and the Carolinas, has reported a data breach involving unauthorized access to its network.
The disruption is felt across the environment, and exposing Sensitive personal information including Social Security numbers, financial account details, driver’s license numbers, credit/debit card numbers, government ID numbers, health records, and names.
In response, and stakeholders are being briefed through Sample breach notice to affected individuals.
The case underscores how Ongoing, with advisories going out to stakeholders covering Sample breach notice to affected individuals.
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 Valid Accounts (T1078) with moderate to high confidence (70%), supported by evidence indicating unauthorized access to its network between September 2025 and February 2026 and Exploit Public-Facing Application (T1190) with moderate confidence (50%), supported by evidence indicating property management firm serving residential communities. Under the Credential Access tactic, the analysis identified Unsecured Credentials (T1552) with moderate confidence (60%), supported by evidence indicating social Security numbers, financial account details compromised and OS Credential Dumping (T1003) with moderate confidence (50%), supported by evidence indicating driver’s license numbers, government ID numbers exposed. Under the Collection tactic, the analysis identified Data from Local System (T1005) with moderate to high confidence (80%), supported by evidence indicating health records, names, and other sensitive data compromised and Data from Information Repositories (T1213) with moderate to high confidence (70%), supported by evidence indicating property management firm’s network accessed for sensitive data. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with moderate to high confidence (70%), supported by evidence indicating data breach involving unauthorized access to its network and Transfer Data to Cloud Account (T1537) with moderate confidence (50%), supported by evidence indicating sensitive data exposed; exfiltration method not specified. Under the Impact tactic, the analysis identified Data Destruction (T1485) with lower confidence (40%), supported by evidence indicating attack threatening the organizations existence and Data Manipulation: Transmitted Data Manipulation (T1565.002) with lower confidence (30%), supported by evidence indicating potential long-term consequences for affected individuals. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.
Sources & References
- Castle Group Rankiteo Cyber Incident Details: https://www.rankiteo.com/company/castle-group/incident/CAS1788456710
- Castle Group CyberSecurity Rating page: https://www.rankiteo.com/company/castle-group
- Castle Group Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/cas1788456710-castle-group-castle-management-breach-september-2025/
- Castle Group CyberSecurity Score History: https://www.rankiteo.com/company/castle-group/history
- Castle Group CyberSecurity Incident Source: https://www.classaction.org/data-breach-lawsuits/castle-group-august-2026
- 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