Threat Intelligence

IOC management, threat feeds, STIX/TAXII, and threat hunting.

Overview

Threat intelligence provides actionable information about threats.

Intelligence Types

Indicators of Compromise

# IOC types
iocs = {
    "ip_addresses": ["10.0.0.1", "192.168.1.100"],
    "domains": ["malicious.com", "evil.org"],
    "hashes": {
        "md5": "abc123...",
        "sha256": "def456..."
    },
    "urls": ["http://malicious.com/payload"],
    "email_addresses": ["attacker@evil.com"]
}

STIX/TAXII

{
  "type": "indicator",
  "spec_version": "2.1",
  "id": "indicator--uuid",
  "created": "2024-01-15T00:00:00.000Z",
  "modified": "2024-01-15T00:00:00.000Z",
  "name": "Malicious IP",
  "description": "Known C2 server",
  "pattern": "[ipv4-addr:value = '10.0.0.1']",
  "pattern_type": "stix",
  "valid_from": "2024-01-15T00:00:00.000Z"
}

Threat Hunting

# Hunting hypothesis
hypothesis = "Adversaries may use PowerShell for lateral movement"

# Hunt queries
queries = [
    "SELECT * FROM process WHERE name = 'powershell.exe'",
    "SELECT * FROM network WHERE dest_port = 5985",
    "SELECT * FROM files WHERE path LIKE '%Temp%\\%.ps1'"
]

# Analysis
for query in results:
    analyze_behavior(query)

MITRE ATT&CK

Tactics:
+-- Initial Access
+-- Execution
+-- Persistence
+-- Privilege Escalation
+-- Defense Evasion
+-- Credential Access
+-- Discovery
+-- Lateral Movement
+-- Collection
+-- Exfiltration
+-- Command and Control

Threat Intel Platforms

Practice

Set up MISP and share threat indicators with partners.