Incident Score: Analysis & Impact (SEKLET1769769766)
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 Let's Encrypt'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 Let's Encrypt 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 Let's Encrypt breach identified under incident ID SEKLET1769769766.
The analysis begins with a detailed overview of Let's Encrypt's information like the linkedin page: https://www.linkedin.com/company/lets-encrypt, the number of followers: 3672, the industry type: Technology, Information and Internet and the number of employees: 6 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 755 and after the incident was 724 with a difference of -31 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 Let's Encrypt and their customers.
A newly reported cybersecurity incident, "TOXICSNAKE Malware Campaign Exploiting Fake Education Domains", has drawn attention.
Security researchers have exposed an advanced traffic distribution network (TDS) leveraging deceptive education-themed domains to distribute malware and phishing attacks.
Impact assessments are still underway, so the full scope is not yet clear.
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 Phishing: Spearphishing Link (T1566.002) with high confidence (90%), supported by evidence indicating deceptive education-themed domains to distribute malware and phishing attacks and Phishing (T1566) with high confidence (90%), supported by evidence indicating mimics legitimate university and educational institution branding to exploit user trust. Under the Execution tactic, the analysis identified JavaScript (T1059.007) with moderate to high confidence (80%), with evidence including obfuscated JavaScript upon user visits, and first-stage loader decodes a remote URL and User Execution: Malicious Link (T1204.001) with moderate to high confidence (80%), supported by evidence indicating fake educational portals that execute obfuscated JavaScript upon user visits. Under the Defense Evasion tactic, the analysis identified Obfuscated Files or Information (T1027) with high confidence (90%), with evidence including obfuscated JavaScript loader, and tokenization to generate unique session IDs, Dynamic Resolution: Domain Generation Algorithms (T1568.002) with moderate to high confidence (70%), supported by evidence indicating rapid domain rotation using Let’s Encrypt TLS certificates, DLL Side-Loading (T1073) with moderate confidence (50%), supported by evidence indicating multi-stage delivery mechanism with remote URL decoding, and Subvert Trust Controls: Install Root Certificate (T1553.004) with moderate confidence (60%), supported by evidence indicating let’s Encrypt TLS certificates for domains. 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 tDS node routes victims to different payloads based on location, device, and browser data, Dynamic Resolution (T1568) with moderate to high confidence (70%), supported by evidence indicating domains resolve to IPs within the 185.33.84.0/23 netblock, and Proxy: External Proxy (T1090.002) with moderate confidence (60%), supported by evidence indicating bulletproof hosting from HZ Hosting Ltd (ASN AS202015). Under the Resource Development tactic, the analysis identified Acquire Infrastructure: Domains (T1583.001) with high confidence (90%), supported by evidence indicating fake education-themed domains (e.g., toxicsnake-wifes.com), Compromise Infrastructure: Server (T1584.004) with moderate to high confidence (80%), supported by evidence indicating bulletproof hosting from HZ Hosting Ltd (ASN AS202015), and Obtain Capabilities: Digital Certificates (T1588.004) with moderate to high confidence (80%), supported by evidence indicating let’s Encrypt TLS certificates for rapid domain rotation. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.
Sources & References
- Let's Encrypt Rankiteo Cyber Incident Details: https://www.rankiteo.com/company/lets-encrypt/incident/SEKLET1769769766
- Let's Encrypt CyberSecurity Rating page: https://www.rankiteo.com/company/lets-encrypt
- Let's Encrypt Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/seklet1769769766-lets-encrypt-regway-cyber-attack-january-2026/
- Let's Encrypt CyberSecurity Score History: https://www.rankiteo.com/company/lets-encrypt/history
- Let's Encrypt CyberSecurity Incident Source: https://cybersecuritynews.com/education-themed-malicious-domains-linked/
- 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