Incident Response & Digital Forensics (DFIR)
Cyberattacks are becoming more sophisticated, frequent, and damaging. When your business faces a breach, every second matters. DefenseNumerique provides end-to-end Incident Response (IR) and Digital Forensics (DFIR) services to contain threats, recover quickly, and prevent future attacks.
We act as your emergency response team—ready to identify, contain, investigate, and remediate security incidents with precision and speed.
A cyber incident can damage business operations, brand reputation, and customer trust—but with the right partner, you can recover quickly and come back stronger.
DefenseNumerique stands ready to support your organization with expert DFIR services, rapid response, and long-term resilience planning.
Fueled by Passion in
Incident Response & Digital Forensics
Our bring global best practices, enterprise-grade tools, and deep regional experience to deliver reliable, evidence-driven investigations and long-term security resilience. Whether responding to a breach, analyzing malware, or strengthening your defense posture, DefenseNumerique ensures your business remains protected, compliant, and ready for emerging cyber threats.
Our emergency incident response service provides immediate support the moment a cyberattack is detected. We quickly assess the situation, identify the source of compromise, and take rapid action to contain malicious activity before it spreads. Whether it is ransomware, malware, insider abuse, or unauthorized access, our specialists work around the clock to stabilize your environment and minimize business disruption.
Our forensic experts collect and analyze digital evidence from:
Laptops, desktops, servers
Cloud environments
Email systems
Mobile devices
Network logs, firewalls, proxies
SIEM, EDR, and security tools
Volatile memory (RAM)
Compromised user accounts
We follow strict forensic procedures to maintain chain of custody, ensuring evidence is legally defensible.
When ransomware strikes, DefenseNumerique moves quickly to identify the ransomware variant, determine whether data exfiltration occurred, and stop further encryption. We support negotiation guidance where required, assist in recovering systems securely, and help organizations rebuild a clean environment. Our priority is to restore business operations while ensuring complete removal of attacker footholds.
We investigate email account takeovers by analyzing login patterns, suspicious access locations, mailbox rules, OAuth tokens, and unauthorized email forwarding. Our team determines whether sensitive data was accessed or shared and provides step-by-step guidance to secure accounts, reset credentials, and implement better controls to prevent future BEC attacks.
Our compromise assessment service answers the critical question: “Is my environment already breached?” Using advanced threat-hunting techniques and forensic tools, we identify indicators of compromise, malicious scripts, persistence mechanisms, and signs of lateral movement. This service is ideal for organizations that suspect abnormal activity or want reassurance that their systems remain safe and uncompromised.
We analyze malicious files through both static and dynamic methods to understand their capabilities, execution behavior, persistence techniques, and command-and-control activity. This allows us to provide accurate indicators of compromise, targeted remediation strategies, and detailed insights into the nature and risk of the malware affecting your systems.
Our Incident Response Retainer Service ensures your organization has priority access to expert support whenever a cyber incident occurs. With predefined SLAs, dedicated response hours, proactive threat reviews, quarterly compromise assessments, and emergency engagement readiness, this service ensures your business is always prepared. Clients with an IR retainer benefit from faster response times, reduced costs, and enhanced visibility into emerging threats. This offering is ideal for organizations that require guaranteed availability of DFIR experts and a structured approach to incident readiness.
DefenseNumerique DFIR Methodology
DefenseNumerique DFIR methodology provides a structured, comprehensive, and globally aligned approach to managing cyber incidents. Our Incident Response and Digital Forensics framework follows leading standards such as NIST 800-61, SANS, and MITRE ATT&CK to ensure fast detection, accurate investigation, and effective recovery.
Preparation
In the preparation phase, DefenseNumerique helps organizations build a strong cybersecurity foundation long before an incident occurs. We implement robust logging, enable advanced monitoring, configure SIEM/EDR tools and establish communication channels. This ensures your environment has the visibility and readiness needed for rapid and effective incident response.
Identification
During identification, our DFIR specialists analyze alerts, system logs, endpoint activity, and network behavior to determine whether a security incident has occurred. We validate suspicious events, identify affected systems, confirm attacker techniques using the MITRE ATT&CK framework, and assess the severity of the compromise. This phase provides a clear understanding of what happened, when it happened, and how it impacts the business.
Containment
The containment phase focuses on stopping the attack and preventing further damage. DefenseNumerique isolates compromised endpoints, disables unauthorized accounts, blocks malicious IPs and domains, applies temporary network controls, and prevents the attacker from moving laterally. Our goal is to stabilize the environment quickly while maintaining essential business operations.
Eradication
Once the threat is contained, we move to eradicate the root cause. This includes removing malware, eliminating persistence mechanisms, deleting rogue accounts, patching vulnerabilities, and fixing misconfigurations that allowed the attack. DefenseNumerique ensures every trace of the attacker is removed so the environment is clean, secure, and ready for restoration.
Recovery
In the recovery phase, we help organizations safely restore their systems and resume normal business operations. This includes verifying system integrity, rebuilding compromised machines, restoring clean backups, and closely monitoring for signs of reinfection. DefenseNumerique ensures that all restored systems are hardened, patched, and protected before returning to production.
Post-Incident Reporting & Lessons Learned
After the incident, we deliver a comprehensive report that includes the full attack timeline, root cause, indicators of compromise, affected assets, forensic evidence, and remediation recommendations. We conduct a lessons-learned session with your team to strengthen processes, improve defenses, and prevent similar incidents in the future.
Collaborations with
Leading Vendors
We use industry-leading forensic and incident response tools to accurately analyze attacks, preserve evidence, and uncover the full scope of the compromise. Our team relies on advanced DFIR tools and enterprise-grade software to identify threats, trace attacker activity, and support fast, precise investigations.