This tutorial outlines specific methods attackers use to bypass network security controls, map infrastructure, and exfiltrate data without triggering intrusion detection systems.
Key Points:
- Firewalking and banner grabbing allow attackers to map firewall rules and identify vulnerable service versions without direct connection.
- IP spoofing, source routing, and tiny fragmentation techniques manipulate packet headers to bypass access controls and evade packet inspection.
- Tunneling protocols such as ICMP, SSH, DNS, and HTTP encapsulate forbidden traffic within allowed protocols to bypass firewalls.
- Proxy servers and external trusted partners provide pivot points to hide origin and bypass perimeter defenses.
- Client-side attacks like XSS and HTML smuggling execute malicious code or deliver payloads by bypassing network-level file scanning.
The article details how attackers move through networks undetected by exploiting the gap between network design assumptions and actual security configurations. Techniques like firewalking and banner grabbing focus on reconnaissance, using normal diagnostic behaviors like traceroute or service handshakes to gather intelligence on open ports and software versions. By incrementing Time-To-Live values or capturing initial response headers, attackers can map firewall rules and identify patch levels without triggering alerts associated with aggressive port scanning.
Learn More: Dark Marc
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Source: r/pwnhub · by /u/_cybersecurity_