Temporal Graph Threat Analysis for Insider Risk Scoring
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Solution Overview
Problem
Existing cybersecurity systems struggle to efficiently detect advanced persistent threats (APT) due to high false positive rates, static nature, lack of contextual analysis, and inadequate feedback mechanisms, making it difficult to identify insider threats that span long periods.
Innovation Solution
A hybrid temporal graph neural network (GNN) is used to analyze network activity, generating user risk scores by combining entity feature embeddings, user behavior embeddings, and peer group metrics, with feedback from static rule-based models to improve detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If static rule-based detectors are used to provide security alerts, then the system is simple to implement, but the false positive rate is high and the system cannot detect long-term threats
Solution Approach 1:
The patent transitions from static rule-based detectors to dynamic machine learning models that continuously learn and adapt to new threat patterns. The system uses temporal graph neural networks that evolve their detection capabilities over time, allowing it to maintain high reliability while detecting long-term sophisticated threats.
Solution Approach 2:
The system implements feedback mechanisms where detection results and threat intelligence are continuously fed back into the machine learning models to improve future detections. This closed-loop approach reduces false positives by learning from past mistakes and enhances detection accuracy through continuous refinement of detection algorithms.
2Device complexity
If individual static detectors are used, then the system complexity is low, but the system cannot provide contextual analysis or peer grouping
Solution Approach 1:
The patent merges multiple individual detectors into a unified machine learning framework that processes user behavior, network activity, and threat intelligence together. This consolidation enables contextual analysis by examining multiple data sources simultaneously and performing peer grouping to identify coordinated threats, thereby reducing information loss while maintaining manageable system complexity through integrated architecture.
Solution Approach 2:
The system creates a universal detection platform that performs multiple functions including anomaly detection, peer grouping, contextual analysis, and threat scoring within a single framework. This multi-functional approach eliminates the need for separate specialized detectors, reducing overall system complexity while preserving and enhancing contextual information through unified processing.
3Measurement precision
If machine learning models with multiple data sources are used, then detection accuracy is improved, but computational complexity and resource requirements increase
Solution Approach 1:
The patent segments the computational workload into distinct processing stages: data collection from multiple sources, feature extraction and embedding, temporal graph construction, and risk score calculation. This segmentation allows each component to be optimized independently, managing computational complexity while maintaining high detection precision through specialized processing at each stage.
Solution Approach 2:
The system performs preliminary actions by pre-processing and embedding user behavior data into compact representations before main detection operations. Temporal graphs are constructed in advance with pre-computed features, reducing the computational burden during real-time threat detection and allowing the system to maintain high precision without excessive resource requirements during critical detection phases.
Data Source
AI summary
Methods, systems, and computer program products are provided for an analysis framework for cybersecurity threats in a network. A method may include receiving data associated with network activity of each user of a plurality of users during a time interval, generating one or more entity feature embeddings for each user based on the data associated with network activity of that user, generating a plurality of user behavior embeddings for the plurality of users based on one or more outputs of a temporal graph neural network (GNN) machine learning model, and calculating a user risk score for a first user based on the plurality of user behavior embeddings, wherein the user risk score represents a measurement of a risk associated with behavior of the first user to cause damage to a network.


