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Erwan Chevalier

PROFILE

Erwan Chevalier

Over a three-month period, contributed to SEKOIA-IO’s automation-library and intake-formats repositories by building and refining security automation features. Developed a Suricata rule enhancement to improve RDP traffic visibility, enabling faster incident response through better network logging. Enhanced the Triage module with conditional binary exclusion and robust signature checking, reducing false positives and improving malware analysis accuracy. Addressed manifest synchronization and improved error handling, ensuring consistent deployment and operational safety. Added support for URL submissions and strengthened logging for troubleshooting. The work leveraged Python, YAML, and Markdown, with a focus on backend development, data validation, and integration of security analysis workflows.

Overall Statistics

Feature vs Bugs

67%Features

Repository Contributions

11Total
Bugs
2
Commits
11
Features
4
Lines of code
7,479
Activity Months3

Work History

July 2025

5 Commits • 2 Features

Jul 1, 2025

July 2025 monthly summary for SEKOIA-IO/automation-library. Delivered robust Triage improvements and URL submission support, with targeted bug fixes that increase signature-check accuracy, reduce false positives, and improve reliability for both file-based and URL-based submissions. Release readiness was enhanced through versioning and changelog updates, enabling clearer downstream communications and faster adoption.

January 2025

5 Commits • 1 Features

Jan 1, 2025

January 2025 performance summary for SEKOIA-IO/automation-library focused on Triage module reliability and triage efficiency. Delivered a feature to exclude binaries with suspicious analysis results based on criteria like insufficient dynamic analysis or large score gaps, improving incident triage quality and reducing false positives. Strengthened robustness of analysis tagging through explicit typing and safe access patterns, guarding against missing keys and dict edge cases to prevent evaluation errors. Resolved manifest version synchronization issues to ensure consistent deployment and behavior across triage components. These changes collectively enhance triage accuracy, maintainability, and operational safety, accelerating response times and reducing risk in automated analyses.

November 2024

1 Commits • 1 Features

Nov 1, 2024

November 2024: Focused on strengthening network visibility and security monitoring by delivering a targeted Suricata rule enhancement for RDP traffic in the intake-formats repository, enabling better logging and quicker incident response.

Activity

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Quality Metrics

Correctness83.6%
Maintainability83.6%
Architecture72.8%
Performance67.2%
AI Usage20.0%

Skills & Technologies

Programming Languages

MarkdownPythonYAML

Technical Skills

API IntegrationAutomationBackend DevelopmentBug FixCI/CDData AnalysisData ValidationDocumentationError HandlingIntrusion Detection SystemsMalware AnalysisNetwork SecurityPythonPython DevelopmentSecurity Analysis

Repositories Contributed To

2 repos

Overview of all repositories you've contributed to across your timeline

SEKOIA-IO/automation-library

Jan 2025 Jul 2025
2 Months active

Languages Used

PythonMarkdown

Technical Skills

AutomationBackend DevelopmentBug FixData ValidationError HandlingMalware Analysis

SEKOIA-IO/intake-formats

Nov 2024 Nov 2024
1 Month active

Languages Used

YAML

Technical Skills

Intrusion Detection SystemsNetwork SecuritySuricata