Most people think of a data breach as a company losing a list of emails and hashed passwords. Stealer logs are a different and more personal problem. They come from malware running on a single person's computer or phone, and they can capture far more than one password. If your device gets infected, the malware can quietly copy everything the browser has saved and send it to whoever controls it. Understanding how this works is the first step to knowing whether your accounts are still safe.
What an info stealer actually does
An info stealer is a small program designed to grab sensitive data and leave. The best-known families are RedLine, Raccoon, and Vidar, but there are dozens of others, and new ones appear constantly. Once the program runs on your device, it works through the places where useful information tends to sit. It reads the passwords your browser has saved, the autofill data you use to complete forms (names, addresses, sometimes card details), and the cookies that keep you logged in to websites.
It often collects more on top of that: a list of installed programs, screenshots of the desktop, files from common folders, and details about cryptocurrency wallets. All of this gets bundled into a single package, the "log," and uploaded to the attacker. The whole process can take a few seconds and usually leaves no obvious sign that anything happened.
Why a stealer log is worse than a normal breach
When a company is breached, you typically lose a password that was at least scrambled, and changing it fixes the problem. A stealer log is more dangerous because of one item in particular: session cookies.
A session cookie is the small token a website gives your browser after you log in, so you don't have to type your password on every page. If an attacker has a valid session cookie, they can load it into their own browser and appear to the website as you, already signed in. That means they can skip the login screen entirely, which also means they can skip multi-factor authentication. Your second factor only protects the moment of logging in. A stolen session is already past that point.
So a stealer log can hand someone live access to your email, banking, social media, or work accounts even if you used a strong password and had MFA turned on. Because the log also contains your saved passwords in readable form, it gives an attacker both the keys and a way around the locks.
How people get infected
Infections almost always come from running something you shouldn't have. The most common source is cracked or pirated software: a "free" version of a paid program, a game crack, or a license-key generator. These files are a natural disguise for malware because the person downloading them already expects to bypass a warning to use them.
Other routes include fake software updates, attachments in convincing emails, links in YouTube descriptions or Discord messages promising free tools, and downloads from sites that imitate a real product's homepage. The common thread is a file you chose to open. Stealers rarely break in on their own; they rely on someone clicking "run."
How to check if you're exposed
You can't tell from the device itself whether your data has already been sold or shared, because the malware's job is to stay quiet. What you can do is search the collections of stealer logs that have been leaked or traded, which is where a search tool helps. Revealer indexes more than 21 billion records, including data pulled from these logs, so you can look up your email address and see whether it appears. If you want to check your own exposure, you can search the info stealer logs dataset directly.
If your details show up, treat the device they came from as compromised until you've cleaned it.
How to clean up
Start by changing your important passwords, but do it from a device you trust, not the one you suspect is infected. Change email and banking first, since those are used to reset everything else. Then sign out of all sessions everywhere you can; most major services have a "log out of all devices" option, which invalidates stolen session cookies.
Run a full scan with reputable antivirus software, and if you ran cracked software or you're unsure, consider wiping and reinstalling the operating system rather than trying to find every piece. Stop saving passwords in the browser and move to a dedicated password manager, and remove any pirated software for good.
If you want to know whether your email or passwords already appear in circulating stealer logs, search the info stealer logs page on Revealer and act on whatever you find.