An actor claiming they returned to black hat activities after laying low for a while has recently churned out network access credentials for big and small companies across the world. Breaching corporate networks and selling access to them is a business in and of itself. The actor appears to be collaborating with affiliates of FXMSP, the threat actor recently indicted by the U.S. Department of Justice. It is estimated that this group made over $1.5 million from selling network access to the same organizations.
Source: https://www.bleepingcomputer.com/news/security/network-intruders-selling-access-to-high-value-companies/