The Fundamentals of Cyberthreat Monitoring
Cyberthreat monitoring refers to all practices, tools and methods aimed at detecting computer threats likely to target an information system in real time. This includes the continuous monitoring of networks, systems, applications, but also external sources (dark web, hacker forums, vulnerability databases, etc.).
Why Is This Monitoring Crucial?
Detection Time Reduction: Quickly detect anomalous activity and react before the attack causes major damage.Attack Anticipation: Identify weak signals and exploited vulnerabilities before they become a real incident.Compliance: Many regulatory frameworks (GDPR, NIS2, etc.) require continuous monitoring and rapid response.What Exactly Are We Monitoring?
The scope of monitoring continues to expand with the sophistication of attacks:
Internal network: monitoring traffic, detecting unusual connections and unauthorized access attempts.Endpoints: in-depth analysis of servers, workstations and connected objects to identify any suspicious behavior.Applications: log monitoring, detection of injection attempts, identification of abnormal behavior.The Crucial Importance of External Sources
Today, the real added value lies more and more in the monitoring of external sources:
Credential and data leaks: Stolen databases are constantly circulating on the dark web, exposing critical access before the company even realizes it.Cybercriminal Monitoring: Underground forums and channels where vulnerabilities, exploits, and information about potential targets are exchanged.Dark web monitoring: Proactive detection of threats targeting the organization (preparation of phishing, identity theft, resale of trade secrets, etc.).Concrete example: If an employee's credentials are put up for sale on a clandestine forum, the threat is often detected first outside the IS: it is the monitoring of these external spaces that makes it possible to anticipate the attack, to alert, to reset access before it is too late.
Cyberthreat Monitoring Tools and Methods
Modern monitoring has historically relied on advanced solutions such as:
SIEM: (Security Information and Event Management): centralizes and analyzes security logs to detect incidents.EDR: (Endpoint Detection & Response): Monitors in-depth behavior on workstations and servers.Threat Intelligence: collection of data on emerging threats and their modus operandi.SOC: (Security Operation Center): a team (internal or outsourced) that drives detection and response.Why Are Traditional Methods No Longer Enough?
Threats evolve faster than traditional methods:
SIEMs, EDRs, and traditional tools rely on already known rules, signatures, or behaviors."Living off the Land" attacks exploit native tools to evade detection.Spear-phishing: targeted campaigns that are undetectable by the usual filters.Fileless malware: runs in memory, not very visible to conventional antiviruses.Cloud attacks: exploitation of stolen credentials or vulnerabilities outside the traditional perimeter.The GSNA Solutions Approach: The Outside-Inside
Our approach is based on outside-inside monitoring:
Outside: monitor the company's external ecosystem (dark web, hacker forums, data leaks, social networks, etc.) to identify threats that emerge externally, before they affect the internal one.Inside: cross-reference this information with the monitoring of internal flows, endpoints and applications.This approach makes it possible to anticipate attacks, react earlier, and provide teams with enriched visibility that is impossible to obtain with traditional methods.
Conclusion
In an era where threats are increasingly sophisticated and fast, proactive surveillance, connected from the outside and inside, is becoming the heart of effective cybersecurity.
