Browser Fingerprint
Also known as: Device fingerprint, Browser fingerprinting
A browser (or device) fingerprint is a set of attributes — user agent, screen, fonts, timezone, and more — that identify a specific browser. Infostealers capture fingerprints alongside cookies so attackers can mimic the victim's device and defeat anti-fraud checks.
What is a browser fingerprint?
A fingerprint is the combination of configuration and hardware signals a browser exposes, which together can uniquely identify a device. Online services use fingerprints for fraud detection — flagging logins from unfamiliar devices.
Why infostealers steal fingerprints
By capturing the victim's fingerprint along with their cookies, attackers can configure "anti-detect" browsers to impersonate the victim's exact device. This makes a hijacked session look like it is coming from the legitimate user, defeating device-based fraud and risk checks.
VantaPrism parses the rich victim metadata in stealer logs — including fingerprint data — so teams understand the full toolkit an attacker would gain from a given infection.
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Why do attackers want a browser fingerprint?
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