Royal Borough of Kensington and Chelsea Breach Incident Score: Analysis & Impact (ROY2003320112625)

In this Rankiteo incident briefing, we review the Royal Borough of Kensington and Chelsea breach identified under incident ID ROY2003320112625.

The analysis begins with a detailed overview of Royal Borough of Kensington and Chelsea's information like the linkedin page: https://www.linkedin.com/company/royal-borough-of-kensington-and-chelsea, the number of followers: 21962, the industry type: Government Administration and the number of employees: 1983 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 714 and after the incident was 673 with a difference of -41 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 Royal Borough of Kensington and Chelsea and their customers.

Royal Borough of Kensington and Chelsea (RBKC) recently reported "Cyber Attack on Multiple London Councils Potentially Compromising Residents' Data", a noteworthy cybersecurity incident.

Kensington and Chelsea, Hammersmith and Fulham, and Westminster City councils in London have been responding to a cyber security incident since Monday morning.

The disruption is felt across the environment, affecting Phone lines and Shared IT systems (unspecified), and exposing Potential compromise of residents' data (unconfirmed).

In response, teams activated the incident response plan, moved swiftly to contain the threat with measures like Mitigations put in place (unspecified), and began remediation that includes Restoring systems with NCSC and cyber specialists, while recovery efforts such as Ongoing efforts to restore all systems as quickly as possible continue, and stakeholders are being briefed through Public statements apologizing for inconvenience, Updates to residents as information becomes available and Notification to Information Commissioner’s Office (ICO).

The case underscores how Ongoing (too early to determine if data compromised or attribution), with advisories going out to stakeholders covering Apology to residents for inconvenience; updates to be provided as available.

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.

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 to high confidence (70%), supported by evidence indicating shared IT systems disrupted; no specific vector but public-facing services (e.g., phone lines) impacted and Valid Accounts (T1078) with moderate confidence (60%), supported by evidence indicating shared IT systems compromise *may* involve abused legitimate credentials (unspecified but implied). Under the Impact tactic, the analysis identified Endpoint Denial of Service: Application or System Exploitation (T1499.004) with moderate to high confidence (80%), supported by evidence indicating disrupted critical services, including phone lines and delays in public services. Under the Defense Evasion tactic, the analysis identified Impair Defenses: Disable or Modify Tools (T1562.001) with moderate confidence (50%), supported by evidence indicating mitigations put in place implies attacker may have disabled security tools (unspecified). Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with lower confidence (40%), supported by evidence indicating potential compromise of residents’ data (unconfirmed but ICO notified). Under the Credential Access tactic, the analysis identified Credentials from Password Stores (T1555) with moderate confidence (50%), supported by evidence indicating shared IT systems breach *may* involve credential theft (no direct evidence but common in multi-tenant attacks). These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.