This targets a specific filename commonly used by hackers or botnets to store harvested credentials.

Hackers seek out verified Facebook accounts because they carry a "trust signal." These accounts are used to:

Go to your Facebook Security settings and "Log Out" of any devices or locations you don't recognize. The Bottom Line

Never reuse your Facebook password on other sites. If a smaller site is breached, your Facebook account remains safe.

Security researchers or law enforcement often set up "honeypots"—fake directories that look like leaked data—to track and identify people attempting to access stolen information.