The dark web is a set of hidden services and markets, often reached by special software, where criminal trade is common.
This page describes that marketplace reality for defenders and does not explain how to reach those services.
How it works
Hidden services use special routing so the host address is not published in the ordinary directory of the web.
Markets there often offer stolen data, accounts, and illegal goods to paying criminals.
For defense, the useful fact is that leaks have buyers.
Monitoring through reputable reporting, fast credential resets, and storing less data matter more than curiosity about the markets themselves.
Concrete examples
- A criminal listing offers company mailboxes for sale after a breach.
- A forum trades copies of identity records collected from many victims.
- Customer data appears for purchase shortly after an intrusion is discovered.
Protective measures
- Watch reputable threat reports for your domains and brand names.
- Reset access quickly when credentials appear outside your control.
- Store only the customer data you truly need, so a leak has less resale value.
- Treat criminal markets as a reason to detect theft early, not as a destination to browse.
Related articles
What is threat intelligence? explains analyzed knowledge about criminal markets that defenders can use without visiting them.
What is spyware? describes software that steals activity which may later be sold in criminal markets.
What is transaction fraud? covers payment abuse that often follows the sale of stolen account data.