CoM-c2itall/tasks/security_hardening.yml

---
# Security hardening tasks for C2 server

- name: Check if system is updated
  apt:
    update_cache: yes
  register: apt_update_result
  until: apt_update_result is success
  retries: 5
  delay: 5

- name: Install security packages (non-UFW)
  apt:
    name:
      - fail2ban
      - unattended-upgrades
      - debsums
      - aide
      - rkhunter
      - logrotate
    state: present
  register: package_install
  until: package_install is success
  retries: 3
  delay: 5

# Skip UFW for AWS, use it for other providers
- name: Determine if using AWS provider
  set_fact:
    is_aws_provider: "{{ provider | default('unknown') == 'aws' }}"

# Only install and configure UFW for non-AWS providers
- name: Check if UFW is installed
  command: which ufw
  register: ufw_check
  failed_when: false
  changed_when: false
  when: not is_aws_provider

- name: Install UFW if not present (non-AWS)
  apt:
    name: ufw
    state: present
    update_cache: yes
  register: ufw_install
  until: ufw_install is success
  retries: 3
  delay: 5
  when: not is_aws_provider and ufw_check.rc != 0

- name: Configure UFW for non-AWS deployments
  block:
    - name: Configure UFW default policies
      ufw:
        state: enabled
        policy: deny
        direction: incoming
      ignore_errors: yes

    - name: Configure UFW for C2 server
      block:
        - name: Reset UFW to default deny
          ufw:
            state: enabled
            policy: deny
            direction: incoming

        - name: Allow SSH only from operator IP
          ufw:
            rule: allow
            port: "22"
            src: "{{ operator_ip }}"
            proto: tcp

        - name: Allow Havoc Teamserver only from operator IP
          ufw:
            rule: allow
            port: "{{ havoc_teamserver_port | default('40056') }}"
            src: "{{ operator_ip }}"
            proto: tcp

        - name: Allow traffic only from redirector
          ufw:
            rule: allow
            port: "{{ item }}"
            src: "{{ redirector_ip }}"
            proto: tcp
          loop:
            - "80"
            - "443"
            - "{{ havoc_http_port | default('8080') }}"
            - "{{ havoc_https_port | default('443') }}" 
            - "{{ gophish_admin_port }}"
      when: "'c2servers' in group_names"

    - name: Configure UFW for redirector
      block:
        - name: Reset UFW to default deny
          ufw:
            state: enabled
            policy: deny
            direction: incoming

        - name: Allow SSH only from operator IP
          ufw:
            rule: allow
            port: "22"
            src: "{{ operator_ip }}"
            proto: tcp

        - name: Allow public services from anywhere
          ufw:
            rule: allow
            port: "{{ item }}"
            proto: tcp
          loop:
            - "80"
            - "443"
            - "{{ shell_handler_port | default('4444') }}"
      when: "'redirectors' in group_names"
  # Only run UFW block if not AWS and UFW is available/installed
  when: not is_aws_provider and (ufw_check.rc == 0 or ufw_install is success)

# Configure iptables fallback if UFW isn't available (non-AWS only)
- name: Configure basic iptables rules if UFW unavailable
  block:
    - name: Set up basic iptables rules for C2 server
      shell: |
        iptables -F
        iptables -P INPUT DROP
        iptables -P FORWARD DROP
        iptables -P OUTPUT ACCEPT
        # Allow established connections
        iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
        # Allow SSH from operator
        iptables -A INPUT -p tcp --dport 22 -s {{ operator_ip }} -j ACCEPT
        # Allow Havoc teamserver from operator
        iptables -A INPUT -p tcp --dport {{ havoc_teamserver_port | default(40056) }} -s {{ operator_ip }} -j ACCEPT
        # Allow traffic from redirector
        iptables -A INPUT -p tcp --dport 80 -s {{ redirector_ip }} -j ACCEPT
        iptables -A INPUT -p tcp --dport 443 -s {{ redirector_ip }} -j ACCEPT
        iptables -A INPUT -p tcp --dport {{ havoc_http_port | default(8080) }} -s {{ redirector_ip }} -j ACCEPT
        iptables -A INPUT -p tcp --dport {{ havoc_https_port | default(443) }} -s {{ redirector_ip }} -j ACCEPT
        iptables -A INPUT -p tcp --dport {{ gophish_admin_port }} -s {{ redirector_ip }} -j ACCEPT
      when: "'c2servers' in group_names"
  when: not is_aws_provider and (ufw_check.rc != 0 and (ufw_install is undefined or ufw_install is failed))

# SSH Hardening - applies to all providers
- name: Harden SSH configuration
  lineinfile:
    path: /etc/ssh/sshd_config
    regexp: "{{ item.regexp }}"
    line: "{{ item.line }}"
    state: present
  loop:
    - { regexp: '^#?PermitRootLogin', line: 'PermitRootLogin no' }
    - { regexp: '^#?PasswordAuthentication', line: 'PasswordAuthentication no' }
    - { regexp: '^#?X11Forwarding', line: 'X11Forwarding no' }
    - { regexp: '^#?MaxAuthTries', line: 'MaxAuthTries 3' }
    - { regexp: '^#?AllowTcpForwarding', line: 'AllowTcpForwarding yes' }
    - { regexp: '^#?ClientAliveInterval', line: 'ClientAliveInterval 300' }
    - { regexp: '^#?ClientAliveCountMax', line: 'ClientAliveCountMax 2' }
  register: ssh_config_updated

- name: Configure system resource limits
  pam_limits:
    domain: "*"
    limit_type: "{{ item.limit_type }}"
    limit_item: "{{ item.limit_item }}"
    value: "{{ item.value }}"
  loop:
    - { limit_type: soft, limit_item: nofile, value: 65535 }
    - { limit_type: hard, limit_item: nofile, value: 65535 }
    - { limit_type: soft, limit_item: nproc, value: 4096 }
    - { limit_type: hard, limit_item: nproc, value: 4096 }

# Set up fail2ban - applies to all providers
- name: Set up fail2ban SSH jail
  copy:
    dest: /etc/fail2ban/jail.d/sshd.conf
    content: |
      [sshd]
      enabled = true
      port = ssh
      filter = sshd
      logpath = /var/log/auth.log
      maxretry = 5
      bantime = 3600
    mode: '0644'
  register: fail2ban_config_updated

- name: Enable automatic security updates
  copy:
    dest: /etc/apt/apt.conf.d/20auto-upgrades
    content: |
      APT::Periodic::Update-Package-Lists "1";
      APT::Periodic::Unattended-Upgrade "1";
      APT::Periodic::AutocleanInterval "7";
    mode: '0644'

- name: Create log cleaning script if zero-logs is enabled
  copy:
    dest: /root/Tools/clean-logs.sh
    content: |
      #!/bin/bash
      # Log cleaning script
      echo "Cleaning system logs at $(date)"
      
      # Clear auth logs
      echo "" > /var/log/auth.log
      echo "" > /var/log/auth.log.1
      
      # Clear syslog
      echo "" > /var/log/syslog
      echo "" > /var/log/syslog.1
      
      # Clear application specific logs
      find /var/log -type f -name "*.log" -exec truncate -s 0 {} \;
      
      # Clear bash history
      cat /dev/null > ~/.bash_history
      history -c
      
      echo "Log cleaning completed at $(date)"
    mode: '0700'
  when: zero_logs | default(false) | bool

# Service restart handlers
- name: Restart SSH service if configuration changed
  service:
    name: ssh
    state: restarted
  when: ssh_config_updated.changed

- name: Check if fail2ban service exists
  stat:
    path: "/etc/init.d/fail2ban"
  register: fail2ban_service_stat

- name: Restart fail2ban service if installed and configuration changed
  service:
    name: fail2ban
    state: restarted
  when: fail2ban_service_stat.stat.exists and fail2ban_config_updated.changed