Authorities from 14 countries shut down major cybercrime forum LeakBase

**Executive summary:** Authorities from over a dozen countries dismantled LeakBase, an English-language cybercriminal forum that archived hundreds of millions of account credentials, payment card and banking data, stealer logs, and other stolen databases; law enforcement seized the site, user data and logs, executed enforcement actions and arrests, and disrupted a major platform used to facilitate credential theft and fraud.