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Analyze » HiddenLayer » HID1766995749

Incident Score: Analysis & Impact (HID1766995749)

The details regarding individual company incidents & reports gives you full view from every side.

Rankiteo Score Impact Analysis

Rankiteo Incident Impact-2
Company Score Before Incident752 / 1000
Company Score After Incident750 / 1000
INCIDENT NUMBERHID1766995749
Type of Cyber IncidentVulnerability
ATTACK VECTORPrompt Manipulation (Tokenization Bypass)
DATA EXPOSEDNA
INCIDENT DATE12/06/2025
STATUSResearch/Public Disclosure

Key Highlights From The Incident Analysis

  • Timeline of HiddenLayer'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 HiddenLayer 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 HiddenLayer breach identified under incident ID HID1766995749.

The analysis begins with a detailed overview of HiddenLayer's information like the linkedin page: https://www.linkedin.com/company/hiddenlayersec, the number of followers: 15864, the industry type: Computer and Network Security and the number of employees: 165 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 752 and after the incident was 750 with a difference of -2 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 HiddenLayer and their customers.

AI-powered spam filter providers recently reported "TokenBreaker: Bypassing LLM Protections via Tokenization Manipulation", a noteworthy cybersecurity incident.

Researchers from HiddenLayer devised a new LLM attack called TokenBreaker that bypasses protection mechanisms by adding or changing a single character in prompts.

The disruption is felt across the environment, affecting AI-powered spam filters, LLMs with vulnerable tokenization methods.

In response, and began remediation that includes Use models with Unigram tokenizers or more robust tokenization methods.

The case underscores how Research/Public Disclosure, teams are taking away lessons such as LLMs using BPE or WordPiece tokenization are vulnerable to prompt manipulation attacks. Unigram tokenizers are more resistant to such attacks, and recommending next steps like Adopt LLMs with robust tokenization methods like Unigram. Implement additional layers of security for AI-powered defenses.

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 Defense Evasion tactic, the analysis identified Impair Defenses: Disable or Modify Tools (T1562.001) with high confidence (90%), with evidence including bypass protective filters while still conveying malicious intent to the underlying LLM, and evading AI-powered spam filters and Indirect Command Execution (T1202) with moderate to high confidence (80%), with evidence including altering or adding a single character to key words to bypass protections, and core LLM interprets the original intent despite manipulation. Under the Initial Access tactic, the analysis identified Phishing: Spearphishing Attachment (T1566.001) with moderate to high confidence (70%), supported by evidence indicating allowing phishing emails or malware-laden messages to reach users undetected and Phishing: Spearphishing Link (T1566.002) with moderate to high confidence (70%), supported by evidence indicating exposing recipients to malicious links or malware. Under the Execution tactic, the analysis identified Command and Scripting Interpreter: JavaScript (T1059.007) with moderate confidence (60%), supported by evidence indicating lLMs interpret manipulated prompts to deliver harmful prompts. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.

Defense Evasion
Impair Defenses: Disable or Modify Tools (90%)
Indirect Command Execution (80%)
Initial Access
Phishing: Spearphishing Attachment (70%)
Phishing: Spearphishing Link (70%)
Execution
Command and Scripting Interpreter: JavaScript (60%)

Sources & References