In an update posted on Friday night, Twitter ran down what its internal investigation has discovered so far. One piece of previously unknown information: the hacker(s) downloaded the personal account data for up to eight of the accounts which they had access to.
I should make this clear up front: that data includes direct messages.
For up to eight of the Twitter accounts involved, the attackers took the additional step of downloading the account’s information through our “Your Twitter Data” tool. We are reaching out directly to any account owner where we know this to be true.