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Top 10 Must-Follow Open-Source Threat Intelligence Feeds

What are threat intel feeds?

A threat intel feed, or threat intelligence feed, provides a continuous data related to cyber threats and risks. All type of businesses can significantly improve their threat intelligence and overall security by routing and integrating the right threat intel feeds to the right threat intelligence and cybersecurity tools. Good threat intel feeds make sure that all type of businesses receive accurate and high-quality data about potential malware threats, indicators of compromise (IoCs), and threatactors.

An important difference “threat feeds” and “Threat intelligence feeds” is that threat feeds and threat intel feeds, they sound similar but have a critical difference. Threat feeds contains raw information and lack specific context. Threat intel feeds—with their inclusion of IoCs—feature more context.

Open-source vs. commercial feeds

Primarly there are two two types of threat feeds. The one which is freely available and also at low cost is classified as open-source feed. On the other hand the feeds which are not freely available openly are classified as commercial feeds.

Criteria for Selection

The following feeds were chosen based on:

  • Relevance: The feed provides different types of actionable intelligence.
  • Update Frequency: Updated feed on regular bases.
  • Community Contribution: Community is actively maintaining and supporting these feeds.
  • Integration Capability: Easy to integrate with SIEMs, firewalls, and other cybersecurity tools.

The Top 10 Open-Source Threat Intelligence Feeds

1. AlienVault Open Threat Exchange (OTX)

  • Website: https://otx.alienvault.com
  • Description: Community gathered to provide the real-time threat intelligence feed.
  • Key Features:
    • Community sharing threat feed to givebac for a safer and secure cyber world.
    • Easy to access API for seamless and easy to integerate.
    • Covers all types of feed (Phishing, C2, Malware).
  • Best For: SOC teams, security analysts, and all types of businesses.

2. AbuseIPDB

  • Website: https://www.abuseipdb.com
  • Description: User-reported database of malicious IP addresses from the whole world.
  • Key Features:
    • Crowdsourced IP reputation data.
    • Automated threat detection with API support.
    • Easy data tracking due to historical data.
  • Best For: Network administrators and security researchers.

3. Malware Bazaar (by abuse.ch)

  • Website: https://bazaar.abuse.ch
  • Description: A repository of known malware samples.
  • Key Features:
    • Provides malware hashes and indicators of compromise (IOCs).
    • Supports YARA rule-based searches.
    • Free to access and contribute.
  • Best For: Threat hunters and malware analysts.

4. URLhaus (by abuse.ch)

  • Website: https://urlhaus.abuse.ch
  • Description: A feed focused on tracking malicious URLs.
  • Key Features:
    • Actively monitors phishing and malware URLs.
    • Free API for integration with security tools.
    • Community-supported threat reporting.
  • Best For: Web security teams and researchers.

5. CIRCL Passive DNS

  • Website: https://www.circl.lu/services/passive-dns/
  • Description: A passive DNS collection service that provides threat intelligence.
  • Key Features:
    • Helps track domain name resolution history.
    • Assists in detecting malicious domains and infrastructure.
  • Best For: SOC teams and forensic analysts.

6. MITRE ATT&CK

  • Website: https://attack.mitre.org
  • Description: A globally recognized knowledge base of adversary tactics and techniques.
  • Key Features:
    • Comprehensive coverage of attack methodologies.
    • Used for threat modeling and red teaming.
  • Best For: Threat intelligence teams and security strategists.

7. ThreatFox (by abuse.ch)

  • Website: https://threatfox.abuse.ch
  • Description: An open platform for sharing indicators of compromise (IOCs).
  • Key Features:
    • Community-driven malware and threat intelligence.
    • Easily integrates with SIEM and security platforms.
  • Best For: Threat intelligence analysts.

8. OpenPhish

  • Website: https://www.openphish.com
  • Description: A real-time phishing threat intelligence feed.
  • Key Features:
    • Identifies and tracks active phishing domains.
    • Supports automated detection and integration.
  • Best For: SOC teams and email security teams.

9. Spamhaus Blocklists

  • Website: https://www.spamhaus.org
  • Description: A widely used threat intelligence feed focused on spam and botnets.
  • Key Features:
    • Provides IP and domain reputation services.
    • Helps filter out malicious emails and traffic.
  • Best For: Email security teams and ISPs.

10. SANS Internet Storm Center (ISC) Suspicious Domains

  • Website: https://isc.sans.edu
  • Description: A database of suspicious domains maintained by the SANS ISC.
  • Key Features:
    • Provides real-time domain threat intelligence.
    • Helps detect and mitigate phishing and malware threats.
  • Best For: Security researchers and network defenders.

How to Use These Feeds Effectively

  • Integrate with SIEM & SOAR: Automate threat detection and response.
  • Cross-reference multiple feeds: Enhance accuracy and avoid false positives.
  • Regularly update security rules: Keep pace with evolving threats.
  • Contribute back to the community: Share new threats to strengthen collective defense.

Conclusion

Open-source threat intelligence feeds play a crucial role in defending against cyber threats. By leveraging the feeds mentioned in this article, cybersecurity professionals can enhance their threat detection and response capabilities. Stay informed, integrate these feeds into your security operations, and help make the digital world a safer place.

Did we miss any valuable open-source threat intelligence feed? Let us know in the comments!

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