A person involved in Twitter hack may have gained access to Twitter's internal dashboard using credentials pinned in one of the company's Slack channels (New York Times)

New York Times:

A person involved in Twitter hack may have gained access to Twitter’s internal dashboard using credentials pinned in one of the company’s Slack channels  —  Several people involved in the events that took down Twitter this week spoke with The Times.  What might have been a pursuit of Bitcoin spun out of control.