How has the Structured Threat Information eXpression (STIX) framework changed over the past two years, and how...
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is it being used to improve threat intelligence?
Threat information, or threat intelligence, started being shared informally and even publicly between enterprises and information security professionals. But as attackers started to monitor the public information, and as organizations began to better understand the value of this sharing, more formal relationships and organizations were set up to improve the safety of it.
Information sharing has become critical to security success. Many Snort intrusion detection system rules have been shared as part of starting threat exchanges. Information Sharing Analysis Centers, or ISACs, are now organized around certain industries such as financial services, maritime security and information technology, among others. In the individual ISAC, organizations can share information to improve threat intelligence among their peers.
What information should be shared and how to share it are still issues under development. There are several different threat-sharing frameworks available today including Structured Threat information eXpression, Open Threat Exchange and Security Event System and Collective Intelligence Framework, among others. And as threat sharing gains more attention, more vendors will likely create their own frameworks, which could potentially cause issues.
STIX is a language and framework for sharing data, but the sharing of the actual data is separate from the framework. This improves threat intelligence because data is easier to share if it is in a common format and provides the structure of how to share this data. Even internal tools -- such as firewalls, security information and event management systems, or intrusion detection systems -- can utilize this framework for exchanging data and to ensure the most up-to-date intelligence is incorporated in the tool.
STIX has included updates in architecture, a new visualization tool and tools for common use cases in recent updates. The updated architecture contains improvements that help incorporate it into other tools and systems; the new visualization tool helps with identifying patterns for further analysis. The tools for common use cases might be the most important update because it lists out scenarios in which enterprises can use STIX for cyberthreat management.
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