Update q4-siem/siem_analyzer.py

q4-siem/siem_analyzer.py

@@ -1,24 +1,122 @@
+#!/usr/bin/env python3
+"""
+Ghaymah Lightweight SIEM Engine
+Author: AbdulRhman Ewais
+Description: Consolidated Log Analyzer for Auth, Nginx, and API services.
+"""
+
+import os
 import re
+import json
 from collections import defaultdict
 
-LOG_FILE = "ghaymah_access.log"
-FAILED_THRESHOLD = 5
+# مسارات السجلات الافتراضية المربوطة بالـ Volume
+LOG_SOURCES = {
+    "auth": "/var/log/siem_logs/auth.log",
+    "web": "/var/log/siem_logs/nginx_access.log",
+    "api": "/var/log/siem_logs/ghaymah_api.log"
+}
 
-ip_failures = defaultdict(int)
+# أنماط الكشف (Detection Signatures)
+BRUTE_FORCE_THRESHOLD = 5
+XSS_PATTERN = re.compile(r'(<script>|javascript:|onerror=|onload=)', re.IGNORECASE)
+SQLI_PATTERN = re.compile(r'(UNION\s+SELECT|SELECT\s+.*\s+FROM|OR\s+1\s*=\s*1|--|/\*|\*/)', re.IGNORECASE)
 
-log_pattern = re.compile(r'(?P<ip>\d+\.\d+\.\d+\.\d+) - - \[.*?\] "(?P<method>\w+) (?P<path>\S+) HTTP/.*?" (?P<status>\d{3})')
+def parse_auth_logs(filepath):
+    """تحليل سجلات المصادقة لكشف هجمات الـ SSH Brute Force"""
+    alerts = []
+    failed_attempts = defaultdict(int)
+    
+    if not os.path.exists(filepath):
+        return alerts
 
-try:
-    with open(LOG_FILE, 'r') as f:
+    # النمط: Failed password for invalid user admin from 192.168.1.50 port 54322 ssh2
+    pattern = re.compile(r'Failed password for .* from (?P<ip>\d+\.\d+\.\d+\.\d+)')
+    
+    with open(filepath, 'r', encoding='utf-8') as f:
         for line in f:
-            match = log_pattern.search(line)
+            match = pattern.search(line)
+            if match:
+                ip = match.group('ip')
+                failed_attempts[ip] += 1
+                if failed_attempts[ip] == BRUTE_FORCE_THRESHOLD:
+                    alerts.append({
+                        "source": "Auth Logs (SSH)",
+                        "ip": ip,
+                        "type": "SSH Brute Force Attempt",
+                        "severity": "High",
+                        "details": f"Detected {failed_attempts[ip]} failed SSH logins."
+                    })
+    return alerts
+
+def parse_web_logs(filepath):
+    """تحليل سجلات Nginx لكشف محاولات الاختراق (SQLi / XSS)"""
+    alerts = []
+    if not os.path.exists(filepath):
+        return alerts
+
+    # النمط القياسي لـ Nginx Log
+    pattern = re.compile(r'(?P<ip>\d+\.\d+\.\d+\.\d+) - - \[.*\] "(?P<method>\w+) (?P<path>\S+) HTTP/.*" (?P<status>\d{3})')
+
+    with open(filepath, 'r', encoding='utf-8') as f:
+        for line in f:
+            match = pattern.search(line)
             if match:
                 data = match.groupdict()
-                if data['status'] == '401' and '/login' in data['path']:
-                    ip_failures[data['ip']] += 1
-                    if ip_failures[data['ip']] >= FAILED_THRESHOLD:
-                        print(f"[ALERT] High Brute Force Risk: {data['ip']} ({ip_failures[data['ip']]} failed attempts)")
-                if "select" in data['path'].lower() or "union" in data['path'].lower():
-                    print(f"[CRITICAL] Potential SQL Injection from {data['ip']}: {data['path']}")
-except FileNotFoundError:
-    print(f"Log file {LOG_FILE} not found. Ready for deployment.")
+                path_decoded = data['path']
+                
+                if SQLI_PATTERN.search(path_decoded):
+                    alerts.append({
+                        "source": "Web Logs (Nginx)",
+                        "ip": data['ip'],
+                        "type": "SQL Injection Attempt",
+                        "severity": "Critical",
+                        "details": f"Suspicious pattern in URL: {path_decoded}"
+                    })
+                elif XSS_PATTERN.search(path_decoded):
+                    alerts.append({
+                        "source": "Web Logs (Nginx)",
+                        "ip": data['ip'],
+                        "type": "Cross-Site Scripting (XSS)",
+                        "severity": "High",
+                        "details": f"Payload detected in path: {path_decoded}"
+                    })
+    return alerts
+
+def parse_api_logs(filepath):
+    """تحليل سجلات تطبيق غيمة لكشف إساءة استخدام الـ Token أو الـ Rate Limit"""
+    alerts = []
+    if not os.path.exists(filepath):
+        return alerts
+
+    with open(filepath, 'r', encoding='utf-8') as f:
+        for line in f:
+            try:
+                log_data = json.loads(line)
+                if log_data.get("status") == 429:  # Too Many Requests
+                    alerts.append({
+                        "source": "Ghaymah API",
+                        "ip": log_data.get("client_ip", "Unknown"),
+                        "type": "API Rate Limit Exceeded",
+                        "severity": "Medium",
+                        "details": f"Client hammered Endpoint: {log_data.get('endpoint')}"
+                    })
+            except json.JSONDecodeError:
+                continue
+    return alerts
+
+def main():
+    all_alerts = []
+    all_alerts.extend(parse_auth_logs(LOG_SOURCES["auth"]))
+    all_alerts.extend(parse_web_logs(LOG_SOURCES["web"]))
+    all_alerts.extend(parse_api_logs(LOG_SOURCES["api"]))
+    
+    # تصدير النتائج لملف JSON لتقرأه الـ Dashboard
+    output_path = "/var/log/siem_logs/siem_alerts.json"
+    with open(output_path, 'w', encoding='utf-8') as out_f:
+        json.dump(all_alerts, out_f, indent=4)
+        
+    print(f"[+] SIEM Analysis complete. {len(all_alerts)} alerts written to {output_path}")
+
+if __name__ == "__main__":
+    main()