Investigating Multi-Vector Cyber Attacks with Cloudflare Log Explorer

Modern cyber threats involve multiple attack vectors, requiring complete visibility for effective defense. Cloudflare Log Explorer provides a unified interface for security forensics, integrating diverse datasets from application services and Cloudflare One. This platform enables security analysts to correlate telemetry, significantly reducing detection times and uncovering complex, multi-layered attack strategies across an organization's digital infrastructure.

Understanding Multi-Vector Cyber Attacks

Contemporary adversaries employ sophisticated tactics that span various entry points, including probing application programming interfaces, generating network noise for distraction, and exploiting stolen credentials across applications and servers. A single security alert often represents only a fraction of a larger, coordinated intrusion. To counter these advanced threats, security teams require a comprehensive view of all events, extending beyond isolated data points to encompass the entire attack surface and reveal the full scope of malicious activity.

Centralized Visibility with Cloudflare Log Explorer

Cloudflare Log Explorer functions as a central repository for security telemetry, consolidating raw logs that act as a detailed record of application interactions, attack attempts, and performance issues. Positioned at the network edge, Cloudflare captures these events before they impact an organization's internal infrastructure. This centralization allows security teams to conduct rapid investigations by providing 360-degree visibility through the integration of numerous datasets, covering Cloudflare's Application Services and Cloudflare One product portfolios in one unified interface.

Application Layer Security Forensics

Granular visibility into public-facing properties is essential for identifying application-layer threats. Cloudflare Log Explorer offers detailed logs such as HTTP Requests, which record all application-layer traffic for reconstructing session activity, exploit attempts, and bot patterns. Firewall Events provide critical evidence of blocked or challenged threats, identifying specific WAF rules or custom filters. Additionally, DNS logs track every query resolved at the authoritative edge, helping to detect cache poisoning, domain hijacking, and infrastructure reconnaissance attempts.

Internal Security and Zero Trust Data

For internal security and Zero Trust environments, Log Explorer monitors critical activities within an organization's protected perimeter. Access Requests track identity-based authentication, detailing user access to internal applications. Gateway logs provide visibility into filtered DNS queries and web traffic, identifying malicious domains or hidden payloads. Audit logs document configuration changes within the Cloudflare dashboard, helping to detect unauthorized administrative actions. These datasets collectively support a robust internal security posture and compliance auditing.

Network Layer Threat Detection

Detecting threats at the network layer requires specialized monitoring capabilities. Magic IDS (Intrusion Detection System) logs surface matches against intrusion detection signatures, alerting investigators to known exploit patterns or malware behavior traversing the network. Network Analytics logs offer high-level visibility into packet-level data, aiding in the identification of volumetric DDoS attacks or unusual traffic spikes. These logs also track L3/L4 network traffic, helping to spot unauthorized port usage, protocol anomalies, and lateral movement within the private network.

Identifying Malicious Scanning Activities

Attackers frequently use automated tools to scan for potential entry points, hidden directories, or software vulnerabilities on public-facing assets. Cloudflare Log Explorer enables security analysts to identify such activities by querying http_requests for specific EdgeResponseStatus codes like 401, 403, or 404 originating from a single IP address, or requests targeting sensitive paths such as /.env or /wp-admin. Furthermore, magic_ids_detections logs provide packet-level visibility into network-layer scanning, allowing for the discovery of a single source IP triggering multiple unique detections across various destination ports.

Maintaining Device and Session Integrity

Ensuring the integrity of user devices and authenticated sessions is a critical component of a strong security framework. Cloudflare Log Explorer captures events related to WARP client settings, logging modifications to security agents on end-user devices to confirm they have not been tampered with or disabled. It also specifically records when users enable or disable their secure connectivity, highlighting periods of potential vulnerability. Additionally, the platform logs the duration and status of authenticated user sessions, providing a complete lifecycle map of user access within the protected environment.