Incident Score: Analysis & Impact (RIN1785882225)
The details regarding individual company incidents & reports gives you full view from every side.
Rankiteo Score Impact Analysis
Key Highlights From The Incident Analysis
- Timeline of RingCentral's Cyber Attack 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 RingCentral 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 RingCentral breach identified under incident ID RIN1785882225.
The analysis begins with a detailed overview of RingCentral's information like the linkedin page: https://www.linkedin.com/company/ringcentral, the number of followers: 318188, the industry type: Software Development and the number of employees: 6706 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 771 and after the incident was 755 with a difference of -16 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 RingCentral and their customers.
RingCentral recently reported "Greatness Phishing-as-a-Service Platform Expands to AiTM and Device-Code Attacks", a noteworthy cybersecurity incident.
The Greatness phishing-as-a-service (PhaaS) platform, active since mid-2022, has evolved from credential phishing to more sophisticated adversary-in-the-middle (AiTM) and device-code phishing attacks targeting Microsoft 365 accounts.
The disruption is felt across the environment, affecting Microsoft 365 (Outlook, Teams, SharePoint, OneDrive), iCloud, Yahoo, Google Workspace, and exposing Outlook mailboxes, Teams chats, SharePoint, OneDrive files, Microsoft 365 data.
Formal response steps have not been shared publicly yet.
The case underscores how teams are taking away lessons such as Risks of overbroad safe-sender lists, need for stricter email authentication controls, importance of monitoring for suspicious MFA-approved logins from hosting or VPN sources, and recommending next steps like Audit whitelisted domains, monitor for Greatness infrastructure, investigate suspicious MFA-approved logins, enforce strict email authentication (SPF, DMARC, DKIM).
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 Phishing: Spearphishing Link (T1566.002) with high confidence (90%), supported by evidence indicating victims who clicked embedded links were redirected to Greatness infrastructure and Phishing (T1566) with high confidence (95%), supported by evidence indicating greatness phishing-as-a-service (PhaaS) platform...sending fake voicemail and performance-review notifications. Under the Credential Access tactic, the analysis identified Adversary-in-the-Middle (T1557) with high confidence (90%), supported by evidence indicating aiTM phishing flow capturing MFA-approved authentication tokens, Steal Application Access Token (T1528) with high confidence (90%), supported by evidence indicating device-code phishing attack...MFA-approved authentication tokens, and Brute Force: Password Guessing (T1110.001) with moderate to high confidence (70%), supported by evidence indicating greatness platform targets Microsoft 365 accounts (implied credential harvesting). Under the Defense Evasion tactic, the analysis identified Modify Authentication Process: Multi-Factor Authentication (T1556.006) with moderate to high confidence (80%), supported by evidence indicating mFA bypass via token replay...persistence lasting over two weeks, Impair Defenses: Disable or Modify Tools (T1562.001) with moderate to high confidence (70%), supported by evidence indicating emails evaded detection because RingCentral was whitelisted, and Subvert Trust Controls: Code Signing (T1553.002) with moderate confidence (60%), supported by evidence indicating fraudulent verified sender banner further reduced suspicion. Under the Persistence tactic, the analysis identified Valid Accounts: Cloud Accounts (T1078.004) with high confidence (90%), supported by evidence indicating persistence in Microsoft 365 accounts lasting over two weeks and Create Account: Cloud Account (T1136.003) with moderate confidence (50%), supported by evidence indicating attackers accessed Outlook mailboxes, Teams chats (implied account misuse). Under the Collection tactic, the analysis identified Email Collection: Remote Email Collection (T1114.002) with high confidence (90%), supported by evidence indicating attackers accessed Outlook mailboxes, Teams chats, Data from Information Repositories: SharePoint (T1213.002) with high confidence (90%), supported by evidence indicating accessed...SharePoint, OneDrive files, and Data from Local System (T1005) with moderate to high confidence (80%), supported by evidence indicating microsoft 365 data compromised via token replay. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with moderate to high confidence (80%), supported by evidence indicating data exfiltration...attackers persisted in systems for over two weeks and Transfer Data to Cloud Account (T1537) with moderate to high confidence (70%), supported by evidence indicating attackers replayed stolen tokens from VPS and commercial VPNs. Under the Command and Control tactic, the analysis identified Application Layer Protocol: Web Protocols (T1071.001) with moderate to high confidence (80%), supported by evidence indicating greatness infrastructure...redirecting victims to phishing flows and Ingress Tool Transfer (T1105) with moderate confidence (60%), supported by evidence indicating token replay from VPS and commercial VPNs. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.
Sources & References
- RingCentral Rankiteo Cyber Incident Details: https://www.rankiteo.com/company/ringcentral/incident/RIN1785882225
- RingCentral CyberSecurity Rating page: https://www.rankiteo.com/company/ringcentral
- RingCentral Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/rin1785882225-ringcentral-cyber-attack-july-2026/
- RingCentral CyberSecurity Score History: https://www.rankiteo.com/company/ringcentral/history
- RingCentral CyberSecurity Incident Source: https://www.bleepingcomputer.com/news/security/phishing-service-spoofs-ringcentral-to-steal-microsoft-365-accounts/
- 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