SSH password cracking tool with multi-threading support and fail2ban protection.

• 🔄 Multi-threaded SSH password cracking
• ⏱️ Configurable connection timeout
• 🛡️ Delay between attempts to avoid detection
• 📝 Verbose mode for detailed logging
• 🛑 Graceful shutdown with signal handling
• 🚦 Connection limiting to prevent overwhelming the server
• 🚨 fail2ban detection and automatic delay adjustment

go build -o passwd-crasher main.go

./passwd-crasher -p password.txt -u root -t 192.168.1.1

• -p : Password file path (one password per line) [required]
• -u : SSH username [required]
• -t : Target server address (host:port or host) [required]
• -n : Number of concurrent threads (default: 1, recommended for SSH)
• -timeout : SSH connection timeout (default: 5s)
• -d : Delay between connection attempts (default: 5ms, use 5s for fail2ban protection)
• -v : Verbose mode (show all attempts)

Basic usage:

./passwd-crasher -p passwords.txt -u root -t 192.168.1.1

With fail2ban protection (5s delay):

./passwd-crasher -p passwords.txt -u root -t 192.168.1.1 -d 5s

Custom delay and timeout:

./passwd-crasher -p passwords.txt -u root -t 192.168.1.1 -d 2s -timeout 10s

Verbose mode with multiple threads:

./passwd-crasher -p passwords.txt -u root -t 192.168.1.1 -n 2 -v

With custom port:

./passwd-crasher -p passwords.txt -u root -t 192.168.1.1:2222

Create a text file with one password per line:

password1
password2
password3
admin123

FOR TESTING PURPOSES ONLY

This tool is designed for authorized security testing and educational purposes only. Unauthorized access to computer systems is illegal. Ensure you have proper authorization before using this tool.

MIT