Our Sharing Model

How Does Our Sharing Platform Work?

Members Upload Information To The Platform

Members upload Structured Threat Information Expression 2.0 (STIX™) packages of linked intelligence with pre-set fields to the CTA platform. All STIX 2.0 packages must contain at least one observable with accompanying context, some elements of which are required. Context is organized around the MITRE ATT&CK framework. CTA’s use of the STIX 2.0 submission format enables easier sharing and improved readability of indicator and context data, empowering members in their efforts to disrupt hostile actors and better protect their customers.

CTA’s Algorithm Scores Each Submission

Each package is assigned a total point value at the time of submission and is correlated with other members’ submissions for mutual validation. All packages are attributed to the submitting member, but the affected entity’s data is anonymized. Members will score more points by validating observables previously submitted by other members while including new or additional context. CTA’s scoring system prioritizes the submission of information that our members value. If a member’s average total daily points is greater than the set minimum value, they will remain in good standing.

Members Extract Data From The Platform

Members in good standing can set filters to extract other members’ submissions. Filters include: the member who submitted, the threat actor name, and the submission date. On average, members are sharing approximately 5 million observables per month (60% files, 33% network observables, 7% other).

What Do We Share Through Our Platform?

Approximately 5,000,000 observables per month in STIX 2.0 packages, with an average of three pieces of context per observable.
Packages include a range of observables and TTPs across the kill chain.
Observables include, for example: files, domain names, addresses, and Uniform Resource Identifiers (URIs).
TTPs: Over 50 TTPs from MITRE’s Common Attack Pattern Enumeration and Classification (CAPEC™) and Adversarial Tactics, Techniques, and Common Knowledge (ATT&CK™).
Membership in CTA gives members access to validated, curated threat intelligence they might otherwise not have.