263.com Credential Leak: What Hackers Can Do With 22K Logins

On 10-Jun-2026, a Telegram user uploaded a stealer log file tied to the domain 263.com, exposing 22,386 records of stolen login data. The file contains email addresses, plaintext passwords, and the URLs of the endpoints those credentials were used on, harvested directly from malware-infected devices rather than stolen from 263.com's own servers.

What Attackers Can Do With This 263.com Leak

With 22,386 working logins in one file, attackers aren't guessing, they're automating. Credential-checking tools can run every email and password pair in this leak against banking sites, email providers, and online retailers within minutes. Because the passwords here are stored in plaintext, there's no encryption standing between an attacker and a working login, so this is a leak built for immediate, large-scale abuse rather than slow, manual cracking.

What Was Exposed

• Email addresses
• Plaintext passwords
• URLs of the endpoints the credentials were used on

Why This Matters

People routinely reuse the same password across multiple accounts, which is exactly what makes a batch this size so useful to attackers. Once they confirm which of the 22,386 logins still work, the next steps are predictable: credential stuffing against other services, account takeover, and from there identity theft or financial fraud. Anyone whose credentials appear here is exposed the moment the log started circulating, not just after someone personally notices.

How This Stealer Log Was Built

Stealer malware typically spreads through cracked software, fake browser updates, or malicious attachments. Once installed on a victim's device, it quietly copies saved browser passwords, autofill entries, and the web addresses they're tied to, then packages everything into a file. That file gets combined with others and distributed through Telegram channels like the one behind this 263.com-linked leak. No one had to break into 263.com's systems. The malware only needed enough infected devices with saved logins for that domain.

Check If You Are Affected

With more than 22,000 records in this leak, the odds that your credentials are among them are worth taking seriously. HEROIC's free breach scanner checks your email against a database of more than 400 billion leaked records, including stealer logs like this one, in seconds. If you find a match, change that password immediately, stop reusing it elsewhere, and turn on multi-factor authentication wherever it's offered.