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You Should Know:
Hardcoded default passwords remain a critical cybersecurity risk, often overlooked in modern systems. These backdoors, originally intended for maintenance, are now exploited by attackers. Below are key commands, tools, and steps to identify and mitigate such vulnerabilities.
1. Finding Hardcoded Credentials in Linux/Unix Systems
Use `grep` to search for common default passwords in configuration files:
grep -r "password|passwd|admin|root|default" /etc/
Check for hardcoded credentials in binaries using `strings`:
strings /usr/bin/suspicious_binary | grep -i "password"
- Scanning for Default Passwords in Network Devices
Use `nmap` to check devices with default credentials:
nmap --script=http-default-accounts -p 80,443,8080 <target_IP>
For routers and IoT devices, use `hydra` for brute-force testing:
hydra -l admin -P /usr/share/wordlists/rockyou.txt <target_IP> http-post-form "/login.php:user=^USER^&pass=^PASS^:Invalid"
3. Windows Hardcoded Password Checks
Search registry for default keys:
reg query HKLM /f "password" /t REG_SZ /s
Audit installed software for known vulnerabilities:
Get-WmiObject -Class Win32_Product | Select Name, Version
4. Mitigation Steps
- Change Default Credentials Immediately after device setup.
- Use Password Managers like KeePass or Bitwarden to avoid hardcoding.
- Regularly Audit Firmware/Software using tools like
Binwalk:binwalk -e firmware.bin
What Undercode Say:
Legacy vulnerabilities like hardcoded passwords persist because of backward compatibility and poor security practices. Modern systems must enforce credential rotation, automated scanning, and firmware signing. Below are additional commands to secure systems:
- Linux Password Policy Enforcement:
sudo chage -M 90 -m 7 -W 14 <username>
- Windows Local Security Policy:
secedit /export /cfg secpolicy.inf
- Check for Default SSH Keys:
find / -name "id_rsa" -o -name "id_dsa" -type f
Expected Output: A system free from default credentials, logged changes, and active monitoring for unauthorized access.
Relevant URLs:
References:
Reported By: Hendryadrian Techissues – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
