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Cybersecurity Network Attacks
Network Attacks Overview
- Attacks exploit vulnerabilities in services, often using bugs or misconfigurations.
- Tools like EyeWitness help identify exposed assets via port scanning and screenshotting.
Buffer Overflows
- Occur due to poor memory handling, typically in C/C++ programs.
- When more data is written than a buffer can handle, the return pointer can be overwritten.
- This allows Remote Code Execution (RCE) where attackers run arbitrary code.
Vulnerability Scanners
- Used to detect known vulnerabilities (not zero-days).
- Support authenticated scanning for deeper insights.
- Examples: Nessus, OpenVAS, Qualys.
Code Execution & Shells
Payloads delivered post-exploitation include:
- Reverse Shell: Victim connects back to attacker.
- Bind Shell: Victim listens on a port, attacker connects to it.
Firewalls can block inbound connections, making egress traffic (reverse shells) a common tactic.
Network Monitoring & C2 Detection
- Attackers control compromised hosts via Command & Control (C2) channels.
- Detection techniques include:
- Identifying long or abnormal HTTP/S connections.
- Monitoring beaconing behavior.
- Detecting large or unexpected data transfers (strobes).
- Contextual analysis is key — not all alerts are equal; IP origin and behavior help prioritize.
Peer-to-Peer Traffic
- Attackers exploit lateral movement using protocols like SMB (port 445).
- Peer-to-peer communication bypasses traditional client-server monitoring and can abuse weak endpoints.
Prefer Learning by Watching?
Watch these YouTube tutorials to understand CYBERSECURITY Tutorial visually:
What You'll Learn:
- 📌 Network Attacks - Everything You Need to Know in 20 Minutes
- 📌 Common Types of Network Attacks