The operations likely emanated from the U.S. and the United Kingdom, but conclusive attribution is not yet available.

The details were part of the company's larger quarterly adversarial threat report.

Facebook has said it plans to fully roll out end-to-end encryption across its services by mid-2023.

Christian crowdfunding website GiveSendGo was still offline Monday morning.

The research highlights a potent hacking group that might not be the most advanced, but doing enough to get the job done.

In one case, Meta removed 300 accounts linked to Israeli-based Black Cube that operated as fictitious personas to set up calls with targets.