Well, that was actually a group that called itself "The Guardians of Peace"  their grammar was fairly reasonable, to be honest.  In other circles, they are referred to as the Lazarus group: https://en.wikipedia.org/wiki/Lazarus_Group
The Shadow Brokers are a whole different animal, using material that seems highly likely to have come from Harold Martin: https://www.wired.com/2016/10/nsa-contractor-arrested-taking-top-secret-documents/