-- ============================================================================
-- 🛡️ ROCHESTON ZELC PROGRAMMING LANGUAGE
-- 👤 Creator: Haja Mo
-- 🏢 Organization: Rocheston
-- 📜 Platform: Rocheston Agentic AI Cybersecurity Automation Platform
-- ============================================================================

-- Playbook: Linux Host Hardening & Threat Eradication (System Ops Keywords)
-- Intent: Demonstrates 'systemd', 'iptables', 'selinux', and 'chmod'. 
-- Automates the neutralization of unauthorized persistence and enforces kernel-level security.
-- Infrastructure: Linux Kernel (Debian/RHEL), Zelfire EDR, Systemd, UFW.
-- Note: 'umask' and 'acl' are set to ensure "Secure by Default" file creation.

package soc.linux_ops
use linux, storage, network, slack, rosecoin

-- ============================================================================
-- 1. CONFIGURATION GOVERNORS (Strongly Typed)
-- ============================================================================
⚙️ keep SECURE_UMASK: Integer = 027
⚙️ keep CRITICAL_SERVICES: Array = ["sshd", "zelfire-agent", "auditd"]

-- ============================================================================
-- 2. THE ENTRY POINT (The Check Block)
-- ============================================================================
🔥 check LinuxHostHardening
  
  -- Trigger Gate: A 'cron' job is created by an unprivileged user to run a hidden binary
  ⚠️ when unauthorized_persistence_detected
    
    🔹 set target_host: String = event.hostname
    🔹 set malicious_job: cron = event.cron_details
    🔹 set binary_path: path  = event.file_path
    
    🚨 alert critical message "HOST BREACH: Unauthorized persistence detected on {target_host}. Hardening kernel space."

    -- ============================================================================
    -- 3. THE KINETIC RESPONSE (kill, signal, service)
    -- ============================================================================
    ⚡ do
      
      -- Action 1: Identify and kill the malicious process group using SIGKILL (9)
      -- Voice-friendly: "Linux kill pid..."
      🔹 set suspect_pid: pid = event.process_id
      ☁️ linux send signal 9 to suspect_pid
      
      -- Action 2: Disable and stop the unauthorized 'systemd' unit
      ☁️ linux systemd unit "backdoor.service" stop
      ☁️ linux systemd unit "backdoor.service" disable
      
      -- Action 3: Remove the malicious 'cron' job
      ☁ chroot target_host linux cron job delete malicious_job
      
      -- Action 4: Quarantine the binary and strip execution 'permissions'
      -- Voice-friendly: "Chmod remove execution..."
      ☁️ linux chmod "000" binary_path
      ☁️ linux chown "root:root" binary_path

      -- ============================================================================
      -- 4. THE KERNEL & NETWORK HARDENING (iptables, selinux, ufw)
      -- ============================================================================
      -- Action 5: Enforce SELinux 'enforcing' mode
      -- This provides kernel-level labeling and mandatory access control.
      ☁️ linux selinux status set "enforcing"
      
      -- Action 6: Reset host firewall (iptables/ufw) to a "Deny All" ingress posture
      -- Voice-friendly: "UFW enable..."
      ☁️ linux ufw reset
      ☁️ linux ufw default deny ingress
      ☁️ linux ufw allow "ssh" -- Maintain management access
      
      -- Action 7: Set the global 'umask' for the system
      ☁️ linux set umask SECURE_UMASK

      -- ============================================================================
      -- 5. THE AUDIT & MAINTENANCE LAYER (journal, apt, df)
      -- ============================================================================
      -- Action 8: Export the 'journal' logs for the last 10 minutes for forensics
      🔹 set forensic_logs: String = linux journal export for_unit "ALL" since "10m"
      
      -- Action 9: Verify disk and memory health post-cleanup
      🔹 set disk_load: load = linux disk status
      🔹 set mem_usage: memory = linux memory status
      
      -- Action 10: Trigger an 'apt' or 'dnf' update for security patches
      ☁️ linux package update --security-only

      -- Action 11: Notify the System Administrators
      📡 notify slack channel "#linux-security-ops" message "🐧 *Host Rehabilitation Complete* \n*Target:* `{target_host}` \n*Status:* `HARDENED` \n*Actions:* PID Killed. Service Disabled. UFW Reset. SELinux Enforced."

      -- ============================================================================
      -- 6. EVIDENCE & PROOF
      -- ============================================================================
      📝 evidence record "Linux_System_Hardening_Cycle" details {
          host: target_host,
          kernel_status: "ENFORCING",
          firewall: "UFW_ACTIVE",
          action: "HOST_OS_IMMUNIZATION_SUCCESS"
      }
      
      -- Anchor the kernel state and journal hashes to Rosecoin
      ⛓️ rosecoin anchor evidence_pack "latest"
      
    🔴 end
  🔴 end
🔴 end