File size: 6,710 Bytes
43ecebd |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 |
Python 3.13.9 (tags/v3.13.9:8183fa5, Oct 14 2025, 14:09:13) [MSC v.1944 64 bit (AMD64)] on win32
Enter "help" below or click "Help" above for more information.
"""
Core Defender Engine
"""
import time
import threading
from datetime import datetime
from collections import deque
import psutil
class DefenderEngine:
def __init__(self):
self.events = deque(maxlen=10000)
self.alerts = deque(maxlen=1000)
self.rules = {}
self.status = {}
self.start_time = time.time()
self.events_processed = 0
def process_event(self, event):
"""Process a security event"""
event['processed_at'] = datetime.now().isoformat()
self.events.append(event)
self.events_processed += 1
# Apply rules to event
for rule_name, rule in self.rules.items():
if rule.is_active() and rule.matches(event):
self.generate_alert({
'rule': rule_name,
'event': event,
'timestamp': datetime.now().isoformat(),
'threat_level': rule.get_threat_level()
})
def generate_alert(self, assessment):
"""Generate security alert"""
alert = {
'id': len(self.alerts) + 1,
'assessment': assessment,
'timestamp': datetime.now().isoformat(),
'status': 'NEW'
}
self.alerts.append(alert)
# Log alert
print(f"SECURITY ALERT: {assessment}")
def get_recent_events(self, limit=100):
"""Get recent security events"""
return list(self.events)[-limit:]
def get_active_rules(self):
"""Get active security rules"""
return {name: rule for name, rule in self.rules.items() if rule.is_active()}
def get_current_threat_level(self):
"""Get current system threat level"""
recent_alerts = [alert for alert in self.alerts if
datetime.now().timestamp() -
datetime.fromisoformat(alert['timestamp']).timestamp() < 3600]
if not recent_alerts:
return "LOW"
high_severity_count = sum(1 for alert in recent_alerts
if alert.get('assessment', {}).get('threat_level', 0) > 80)
if high_severity_count > 5:
return "CRITICAL"
elif high_severity_count > 2:
return "HIGH"
elif len(recent_alerts) > 10:
return "MEDIUM"
else:
return "LOW"
def update_status(self, status):
"""Update system status"""
self.status = status
def get_cpu_usage(self):
"""Get current CPU usage"""
return psutil.cpu_percent()
def get_memory_usage(self):
"""Get current memory usage"""
return psutil.virtual_memory().percent
def get_average_response_time(self):
"""Get average response time"""
# Simulated response time
return 2.8
def get_events_processed_count(self):
"""Get total events processed"""
return self.events_processed
# Base Rule Class
class SecurityRule:
def __init__(self, name, config):
self.name = name
self.config = config
self.active = config.get('active', True)
self.threat_level = config.get('threat_level', 50)
def is_active(self):
return self.active
def matches(self, event):
"""Check if event matches this rule"""
raise NotImplementedError
def get_threat_level(self):
return self.threat_level
# Network Traffic Spike Rule
class NetworkTrafficSpikeRule(SecurityRule):
def matches(self, event):
if event.get('type') != 'network_traffic':
return False
current_traffic = event.get('traffic_mbps', 0)
baseline = self.config.get('baseline_mbps', 100)
threshold = self.config.get('spike_threshold_percent', 200)
spike_threshold = baseline * (threshold / 100)
return current_traffic > spike_threshold
# Resource Usage Spike Rule
class ResourceUsageSpikeRule(SecurityRule):
def matches(self, event):
if event.get('type') != 'resource_usage':
return False
usage_type = event.get('resource_type')
current_usage = event.get('usage_percent', 0)
threshold = self.config.get(f'{usage_type}_threshold', 80)
# Exclude system processes
process_name = event.get('process_name', '')
excluded_processes = ['system_update', 'windows_update', 'apt-get']
return (current_usage > threshold and
process_name not in excluded_processes)
# Data Exfiltration Rule
class DataExfiltrationRule(SecurityRule):
def matches(self, event):
if event.get('type') != 'data_transfer':
return False
# Check transfer size
transfer_size = event.get('size_mb', 0)
size_threshold = self.config.get('size_threshold_mb', 100)
if transfer_size > size_threshold:
return True
...
... # Check file extension
... file_ext = event.get('file_extension', '')
... suspicious_exts = self.config.get('suspicious_extensions', ['.zip', '.rar', '.exe'])
...
... if file_ext in suspicious_exts:
... return True
...
... # Check destination
... dest_ip = event.get('destination_ip', '')
... blacklist = self.config.get('blacklisted_ips', [])
...
... if dest_ip in blacklist:
... return True
...
... return False
...
... # Unauthorized Access Rule
... class UnauthorizedAccessRule(SecurityRule):
... def matches(self, event):
... if event.get('type') != 'login_attempt':
... return False
...
... failed_attempts = event.get('failed_attempts', 0)
... threshold = self.config.get('attempt_threshold', 5)
...
... if failed_attempts > threshold:
... return True
...
... # Check restricted accounts
... username = event.get('username', '')
... restricted_accounts = self.config.get('restricted_accounts', ['admin', 'root'])
...
... if username in restricted_accounts:
... return True
...
... return False
|