Incident Score: Analysis & Impact (TES1779834324)
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Rankiteo Score Impact Analysis
Key Highlights From The Incident Analysis
- Timeline of Tessco LLC's Ransomware 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 Tessco LLC 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 Tessco LLC breach identified under incident ID TES1779834324.
The analysis begins with a detailed overview of Tessco LLC's information like the linkedin page: https://www.linkedin.com/company/tessco-technologies, the number of followers: 16366, the industry type: Telecommunications and the number of employees: 743 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 757 and after the incident was 593 with a difference of -164 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 Tessco LLC and their customers.
On 14 May 2026, Tessco disclosed Data Breach, Ransomware issues under the banner "Tessco Data Breach: Cybercriminals Claim Theft of 615GB of Sensitive Data".
Wireless connectivity product distributor Tessco reportedly fell victim to a cyberattack, with the ransomware group PayoutsKing later claiming responsibility.
The disruption is felt across the environment, and exposing 615GB, with nearly 600,000+ records at risk.
In response, and stakeholders are being briefed through No official confirmation as of May 14, 2026.
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 Exploit Public-Facing Application (T1190) with moderate confidence (50%), supported by evidence indicating wireless connectivity product distributor Tessco reportedly fell victim and Valid Accounts (T1078) with moderate confidence (60%), supported by evidence indicating salesforce records for more than 500,000 customers compromised. Under the Execution tactic, the analysis identified User Execution: Malicious File (T1204.002) with lower confidence (40%), supported by evidence indicating ransomware group PayoutsKing later claiming responsibility. Under the Credential Access tactic, the analysis identified Credentials from Password Stores (T1555) with moderate to high confidence (70%), supported by evidence indicating salesforce records and personal details compromised and OS Credential Dumping (T1003) with moderate confidence (60%), supported by evidence indicating 615GB of data exfiltrated, including SSNs and birthdates. Under the Collection tactic, the analysis identified Data from Local System (T1005) with moderate to high confidence (80%), supported by evidence indicating 615GB of data exfiltrated, including corporate and personal data and Data from Information Repositories (T1213) with high confidence (90%), supported by evidence indicating salesforce records for more than 500,000 customers compromised. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with high confidence (90%), supported by evidence indicating 615GB of data exfiltrated by ransomware group PayoutsKing and Exfiltration Over Web Service (T1567) with moderate to high confidence (70%), supported by evidence indicating data breach posted on dark web monitoring site Ransomware.Live. Under the Impact tactic, the analysis identified Data Encrypted for Impact (T1486) with high confidence (90%), supported by evidence indicating data encryption confirmed by ransomware group PayoutsKing and Inhibit System Recovery (T1490) with moderate confidence (60%), supported by evidence indicating ransomware attack with no official confirmation of recovery. Under the Defense Evasion tactic, the analysis identified Obfuscated Files or Information (T1027) with moderate to high confidence (70%), supported by evidence indicating ransomware group PayoutsKing involved in data encryption and Impair Defenses: Disable or Modify Tools (T1562.001) with moderate confidence (50%), supported by evidence indicating no official confirmation of breach or containment measures. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.
Sources & References
- Tessco LLC Rankiteo Cyber Incident Details: https://www.rankiteo.com/company/tessco-technologies/incident/TES1779834324
- Tessco LLC CyberSecurity Rating page: https://www.rankiteo.com/company/tessco-technologies
- Tessco LLC Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/tes1779834324-tessco-ransomware-april-2026/
- Tessco LLC CyberSecurity Score History: https://www.rankiteo.com/company/tessco-technologies/history
- Tessco LLC CyberSecurity Incident Source: https://www.classaction.org/data-breach-lawsuits/tessco-april-2026
- 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