Incident Score: Analysis & Impact (CHI1775493513)
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Rankiteo Score Impact Analysis
Key Highlights From The Incident Analysis
- Timeline of Chime'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 Chime 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 Chime breach identified under incident ID CHI1775493513.
The analysis begins with a detailed overview of Chime's information like the linkedin page: https://www.linkedin.com/company/chime-card, the number of followers: 178503, the industry type: Financial Services and the number of employees: 2417 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 768 and after the incident was 748 with a difference of -20 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 Chime and their customers.
On 03 April 2026, Chime disclosed Data Breach, Cyberattack, Service Disruption issues under the banner "Chime Class Action Lawsuit Over Alleged Data Breach and Cybersecurity Failures".
Two Chime customers filed a class action lawsuit against the fintech company alleging failure to protect customer data and account access during a cyberattack on April 1, 2026, that disrupted its platform.
The disruption is felt across the environment, affecting Chime's digital banking platform, and exposing Personally Identifiable Information (PII).
In response, and stakeholders are being briefed through Delayed customer notifications.
The case underscores how Pending, with advisories going out to stakeholders covering Delayed notifications to affected customers.
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 (60%), supported by evidence indicating cyberattack on April 1, 2026, that disrupted its platform and Valid Accounts (T1078) with moderate confidence (50%), supported by evidence indicating users experienced issues, with no alternative access to funds. Under the Credential Access tactic, the analysis identified Unsecured Credentials (T1552) with moderate to high confidence (70%), supported by evidence indicating alleged failure to protect unencrypted PII and Brute Force (T1110) with lower confidence (40%), supported by evidence indicating users locked out of accounts during outage. Under the Collection tactic, the analysis identified Data from Local System (T1005) with moderate to high confidence (80%), supported by evidence indicating stolen personally identifiable information (PII) may be published. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with moderate to high confidence (70%), supported by evidence indicating team 313 claimed responsibility for data theft and Exfiltration Over Web Service (T1567) with moderate confidence (60%), supported by evidence indicating pII potentially published on the dark web. Under the Impact tactic, the analysis identified Service Stop (T1489) with high confidence (90%), supported by evidence indicating users unable to access accounts, view balances, transfer funds and Defacement (T1491) with moderate confidence (50%), supported by evidence indicating black screen displaying outdated information. Under the Defense Evasion tactic, the analysis identified Disabling Security Tools (T1089) with moderate confidence (60%), supported by evidence indicating failed to meet industry cybersecurity standards and Impair Defenses: Disable or Modify Tools (T1562.001) with moderate confidence (50%), supported by evidence indicating alleged cybersecurity failures. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.
Sources & References
- Chime Rankiteo Cyber Incident Details: https://www.rankiteo.com/company/chime-card/incident/CHI1775493513
- Chime CyberSecurity Rating page: https://www.rankiteo.com/company/chime-card
- Chime Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/chi1775493513-chime-cyber-attack-april-2026/
- Chime CyberSecurity Score History: https://www.rankiteo.com/company/chime-card/history
- Chime CyberSecurity Incident Source: https://www.claimdepot.com/cases/chime-financial-lawsuit-claims-data-breach-left-users-locked-out-of-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