Infostealer
Commodity malware that runs once on a machine, empties every credential store it can reach, and leaves. Browser passwords, session cookies, crypto wallet files, VPN and messaging configs, then a screenshot and a file listing. The output is a stealer log.
Why it matters to you
The malware is not the incident, the log is. By the time anyone finds the infection the credentials have been sold, and cleaning the endpoint changes nothing about that. Assume every secret that machine could reach is public and rotate on that basis, sessions included.
Where we meet it
The same log surfaces in more than one shop, resold and repackaged, so a credential's first appearance and its last can be weeks apart. Freshness is what the price tracks, which means the cheap ones are the ones that have already been worked through.
Connected terms
Stealer log
The complete output of an infostealer infection: every saved browser password, session cookie, autofill record and crypto-wallet file from one victim machine, zipped into a single bundle.
Cloud of logs
A subscription Telegram channel that pours out fresh stealer logs daily to paying members. Bulk access to victims, sold like a streaming service.
Traffer
The distribution worker of the stealer economy: drives victims to infected downloads via malvertising, fake installers, cracked software and phishing. Organized into teams with quotas and payout shares.
Session cookie
The token that proves a browser is already logged in, copied straight out of a victim's browser by an infostealer. Replayed elsewhere it opens the account without the password and without a second factor.
Read elsewhere
Where this term stops being vocabulary
Sherlog is where you watch it happen to you
Knowing the word is the cheap half. The platform is the half where the term arrives attached to your domain, with a timestamp and the source it came from.
More from the playbook
Adversary-in-the-middle phishing
A phishing page that proxies the real login instead of imitating it. The victim authenticates against the genuine site through the attacker's server, completes multi-factor as normal, and the attacker keeps the resulting session cookie.
Business Email Compromise (BEC)
Fraud committed from inside a real mailbox: the attacker reads the thread, waits for an invoice and answers it with different bank details. No malware, no attachment, nothing for a scanner to find.
Callback phishing
An email that carries no link and no attachment, only a plausible invoice or subscription notice and a phone number to dispute it. The attack begins when the victim calls, and the person who answers walks them into installing remote access software.
Checker
A tool that tests stolen credentials against a target service in bulk and sorts the live ones from the dead. The industrialized step between a combolist and an account takeover.