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Exfiltration Techniques

Methods used by attackers to steal sensitive data from compromised systems.

Understanding Exfiltration Techniques


Data exfiltration can occur through various channels, including malicious insiders, malware infections, and external cyberattacks. Attackers often disguise exfiltrated data to bypass network security tools like Data Loss Prevention (DLP) and Intrusion Detection Systems (IDS).

Key Features of Data Exfiltration


  1. Covert Data Transfer – Attackers use encryption, steganography, and tunneling to hide stolen data.

  2. Multiple Exfiltration Channels – Includes network traffic, email, cloud storage, and USB devices.

  3. Evasion Techniques – Using protocol obfuscation, data chunking, and DNS tunneling to avoid detection.

Best Practices for Preventing Data Exfiltration


1. Implement Network Segmentation & Access Controls

  • Restrict sensitive data access based on user roles and privileges.

2. Deploy Data Loss Prevention (DLP) Solutions

  • Monitor outbound traffic and block unauthorized data transfers.

3. Monitor Anomalous User & Network Activity

  • Detect large data transfers, unauthorized access, and unusual login locations.

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