Incident Score: Analysis & Impact (MERCHESAMCOMFOXATTFORTOY1781713752)
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 AT&T's Vulnerability 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 AT&T 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 AT&T breach identified under incident ID MERCHESAMCOMFOXATTFORTOY1781713752.
The analysis begins with a detailed overview of AT&T's information like the linkedin page: https://www.linkedin.com/company/att, the number of followers: 1695354, the industry type: Telecommunications and the number of employees: 194164 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 120 and after the incident was 117 with a difference of -3 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 AT&T and their customers.
Chevron recently reported "FortiBleed: Massive Fortinet VPN Credential Leak Exposes 74,000 Firewalls Worldwide", a noteworthy cybersecurity incident.
A newly uncovered data leak, dubbed *FortiBleed*, has exposed credentials for 73,932 Fortinet and FortiGate VPN firewalls across organizations globally.
The disruption is felt across the environment, affecting 73,932 Fortinet and FortiGate VPN firewalls, Active Directory environments, and exposing Usernames, email addresses, plaintext passwords, attack logs, scripts, tooling, organizational profiles (revenue, employee counts, industry classifications), classified documents (in some cases), with nearly 73,932 Fortinet devices, 21,632 unique domains records at risk.
Formal response steps have not been shared publicly yet.
The case underscores how Ongoing.
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 External Remote Services (T1133) with high confidence (90%), supported by evidence indicating exposed credentials for 73,932 Fortinet and FortiGate VPN firewalls, Exploit Public-Facing Application (T1190) with moderate to high confidence (70%), supported by evidence indicating potentially misconfigurations or zero-day flaws in Fortinet VPNs, and Valid Accounts (T1078) with high confidence (95%), supported by evidence indicating usernames, email addresses, and plaintext passwords for high-profile targets. Under the Credential Access tactic, the analysis identified Brute Force: Password Spraying (T1110.003) with moderate to high confidence (80%), supported by evidence indicating 1.16 billion credential-stuffing attempts against FortiGate targets, Brute Force: Password Cracking (T1110.002) with high confidence (90%), supported by evidence indicating 45-GPU cluster running Hashtopolis to crack SSL VPN authentication hashes, and Unsecured Credentials: Credentials In Files (T1552.001) with moderate to high confidence (85%), supported by evidence indicating data extracted from Fortinet configuration files (email addresses, passwords). Under the Lateral Movement tactic, the analysis identified Remote Services: Remote Desktop Protocol (T1021.001) with moderate to high confidence (70%), supported by evidence indicating leveraged stolen credentials to infiltrate Active Directory environments and Valid Accounts (T1078) with high confidence (90%), supported by evidence indicating used compromised credentials to access internal systems. Under the Collection tactic, the analysis identified Data from Local System (T1005) with moderate to high confidence (80%), supported by evidence indicating attack logs, scripts, tooling, and organizational profiles collected and Data from Information Repositories (T1213) with moderate to high confidence (70%), supported by evidence indicating classified documents allegedly exfiltrated from Turkish NATO contractor. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with moderate to high confidence (80%), supported by evidence indicating classified documents exfiltrated from compromised entities and Transfer Data to Cloud Account (T1537) with moderate confidence (60%), supported by evidence indicating dataset analyzed by Hudson Rock and Kevin Beaumont. Under the Defense Evasion tactic, the analysis identified Valid Accounts: Cloud Accounts (T1078.004) with moderate to high confidence (70%), supported by evidence indicating used legitimate credentials to bypass authentication controls and Impair Defenses: Disable or Modify System Firewall (T1562.004) with moderate confidence (60%), supported by evidence indicating many devices exposing management interfaces directly to the web. Under the Reconnaissance tactic, the analysis identified Active Scanning: Vulnerability Scanning (T1595.002) with moderate to high confidence (80%), supported by evidence indicating shodan network scans revealed nearly half of exposed Fortinet firewalls and Gather Victim Network Information: Domain Properties (T1590.001) with moderate to high confidence (70%), supported by evidence indicating 21,632 unique domains spanning 194 countries identified. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.
Sources & References
- AT&T Rankiteo Cyber Incident Details: https://www.rankiteo.com/company/att/incident/MERCHESAMCOMFOXATTFORTOY1781713752
- AT&T CyberSecurity Rating page: https://www.rankiteo.com/company/att
- AT&T Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/merchesamcomfoxattfortoy1781713752-fortinet-foxconn-comcast-chevron-samsung-att-mercedes-benz-toyota-vulnerability-may-2026/
- AT&T CyberSecurity Score History: https://www.rankiteo.com/company/att/history
- AT&T CyberSecurity Incident Source: https://www.bleepingcomputer.com/news/security/fortibleed-leak-exposes-fortinet-vpn-credentials-for-73-000-devices/
- 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