The group, which goes by the name 'The Dark Overlord', posted a message detailing an intention to leak several sensitive documents relevant to the September 11th terrorist attacks the group had allegedly obtained. According to Motherboard, 'The Dark Overlord' claims to have stolen the documents from different insurers and legal firms including Hiscox Syndicates, Lloyds of London, and Silverstein Properties.
Steem is primarily a blogging platform that uses Steem blockchain to host posts and comments. In order to display the information stored on the blockchain, a user interface is needed. The hacking group’s account has been removed from Steemit.com, an interface operated by the same company that leads development of Steem, but other Steem interfaces, such as Busy.org and SteemPeak, have not banned the user nor deleted the post.