The Cybersecurity and Infrastructure Security Agency (CISA) has unwrapped Decider, a new, free tool to help security practitioners, security analysts and researchers map adversary tactics, techniques and procedures (TTP) to the Att&ck knowledge base.Decider makes creating Att&ck mappings easier to get right by walking users through the mapping process. It does so by asking a series of guided questions about adversary activity to help users arrive at the correct tactic, technique or sub-technique. Decider has a powerful search-and-filter functionality that enables users to focus on the parts of Att&ck that are relevant to their analysis. Decider has a cart functionality that lets users export results to commonly used formats, such as tables and Att&ck Navigator heat maps. According to a CISA fact sheet that accompanied Decider’s release, with Mitre Att&ck mapping reports users can move on to other Att&ck activities, including:Visualizing the findings in Att&ck Navigator Sharing the findings with others by publishing threat intelligence reports Finding sensors and analytics to detect those techniques Discovering mitigations that help prevent techniques from working in the first place Compiling threat emulation plans to validate defenses CISA said it welcomes feedback from the cybersecurity community, bug reports and feature suggestions.