Unauthorized authenticated access
An unauthenticated attacker rattling your login page is easy to spot. An attacker who signs in correctly, from a plausible device, is not - they look exactly like the person whose account it is.
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Leaked.Domains
Billions of leaked credentials, matched against the domains you own - so you find out which of your accounts are exposed before somebody else tries them.
Leaked.Domains is a Joe Black Security service with its own platform at leaked.domains.
An intruder holding valid credentials is not breaking in. They are logging in - and from the inside, their session is indistinguishable from an ordinary employee's. That is why credential-based intrusion remains the most common way organizations are compromised, and the hardest kind to notice.
Leaked.Domains aggregates credential data from public breaches, combolists, infostealer logs and criminal marketplaces, then matches it against the domains you own. You learn which accounts appear, in which breach, and how recently.
The direct hits matter, but they are rarely the most interesting part. Historic passwords reveal how your people build them - and people are predictable. A password from a 2019 breach with an incremented digit on the end is very often the password protecting something of yours today. Corporate addresses turning up on unrelated consumer services tell you where else that password has been typed.
We report exposure at the organizational level, and can monitor continuously so that new leaks reach you as they surface rather than months later.
The risk
What leaked credentials are actually used for
Credential stuffing
Automated replay of leaked username and password pairs against every login surface you expose. It costs the attacker almost nothing, so it never stops.
Password pattern prediction
Even when a leaked password no longer works, it exposes the scheme behind it. Season, year, company name, incremented digit - the pattern usually holds.
Session and token theft
Infostealer logs trade in live session cookies, not just passwords. A stolen session walks straight past multi-factor authentication because the authentication already happened.
Third-party service misuse
Corporate addresses used to register on unrelated services. Each one is another place that password has been typed, and another breach waiting to include you.
Supplier exposure
Your suppliers hold access to your systems and frequently a fraction of your security budget. Their leaked credentials are, functionally, your leaked credentials.
Find out what's already out there
Send us the domains you own and we will tell you what is exposed. Quickly, and before somebody else makes it their business.