Breach monitoring: strengths and limitations

Breach monitoring is valuable for detecting when employee credentials appear in leaked databases. Services like Have I Been Pwned aggregate known breaches and make them searchable. But the core limitation is that this data is historical. The credentials found in breach databases are often years old by the time they are indexed. Forcing a password reset is the standard response, and it works for password-based attacks. But it does nothing for stolen sessions, which are live at the time of infection.

Infostealer monitoring: what it adds

Infostealer monitoring covers the gap that breach monitoring misses. When a device is infected with an infostealer, the stolen data is sold on criminal marketplaces within hours. This data includes session tokens that bypass most MFA methods, a threat that password resets do not mitigate. Only session revocation stops this attack.

Additionally, infostealer monitoring provides device context: which device was infected, what malware was used, and exactly which sessions are compromised. This enables targeted response rather than blanket password resets.

Do you need both?

Yes. Breach monitoring covers historical credential exposure, and infostealer monitoring covers active, real-time threats. Beyond that, there are leaks and emerging threats that fall outside both categories. Passguard covers both sides: it monitors criminal marketplaces for stolen sessions from actively infected devices, and simultaneously tracks breaches, leaks, and emerging threats, giving you one platform with complete visibility.