Incident Score: Analysis & Impact (GTCZEN1785882465)
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 Guaranty Trust'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 Guaranty Trust 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 Guaranty Trust breach identified under incident ID GTCZEN1785882465.
The analysis begins with a detailed overview of Guaranty Trust's information like the linkedin page: https://www.linkedin.com/company/gtcoplc, the number of followers: 289192, the industry type: Financial Services and the number of employees: 10213 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 760 and after the incident was 692 with a difference of -68 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 Guaranty Trust and their customers.
Zenith Bank recently reported "Zenith Bank Cyberattack - Customer Data Exposed", a noteworthy cybersecurity incident.
Zenith Bank, one of Nigeria’s largest financial institutions, disclosed a cyberattack on its systems, resulting in the theft of limited customer information, including email addresses and phone numbers, as part of a broader global cyber offensive targeting organizations across...
The disruption is felt across the environment, and exposing Email addresses and phone numbers.
In response, teams activated the incident response plan, and stakeholders are being briefed through Email sent to customers.
The case underscores how Ongoing, and recommending next steps like Customers urged to remain cautious against phishing attempts, with advisories going out to stakeholders covering Email sent to customers warning about phishing attempts and confirming no sensitive data (passwords, PINs, OTPs) was exposed.
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 its systems, resulting in the theft of limited customer information and Phishing (T1566) with moderate to high confidence (70%), supported by evidence indicating customers urged to remain cautious against phishing attempts. Under the Credential Access tactic, the analysis identified Compromise Accounts (T1586) with moderate confidence (50%), supported by evidence indicating hackers accessed email addresses and phone numbers. Under the Collection tactic, the analysis identified Data from Local System (T1005) with moderate to high confidence (80%), supported by evidence indicating theft of limited customer information, including email addresses and phone numbers. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with moderate to high confidence (70%), supported by evidence indicating data exfiltration such as Yes in incident_details.data_breach and Exfiltration Over Alternative Protocol (T1048) with moderate confidence (60%), supported by evidence indicating broader global cyber offensive targeting organizations across multiple sectors. Under the Impact tactic, the analysis identified Data Destruction (T1485) with lower confidence (30%), supported by evidence indicating no details on malware’s origin or extent of breach and Data Manipulation: Stored Data Manipulation (T1565.001) with lower confidence (40%), supported by evidence indicating escalating cyber risks facing Nigeria’s financial sector. Under the Defense Evasion tactic, the analysis identified Valid Accounts (T1078) with moderate confidence (50%), supported by evidence indicating banking services and digital platforms remain secure and operational and Hide Artifacts: Hidden Files and Directories (T1564.001) with lower confidence (40%), supported by evidence indicating ongoing investigation into the incident. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.
Sources & References
- Guaranty Trust Rankiteo Cyber Incident Details: https://www.rankiteo.com/company/gtcoplc/incident/GTCZEN1785882465
- Guaranty Trust CyberSecurity Rating page: https://www.rankiteo.com/company/gtcoplc
- Guaranty Trust Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/gtczen1785882465-zenith-bank-guaranty-trust-bank-breach-august-2026/
- Guaranty Trust CyberSecurity Score History: https://www.rankiteo.com/company/gtcoplc/history
- Guaranty Trust CyberSecurity Incident Source: https://www.thecable.ng/hackers-hit-zenith-bank-steal-customers-information/
- 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