How a Stealer Log Named ‘0-9’ Leaked 3,867 Passwords and Emails

In May 2024, HEROIC analysts identified a stealer log labeled "0-9" uploaded to a Telegram channel, containing 3,867 records of email addresses, plaintext passwords, and browser URLs taken from infected devices. Why This Is Dangerous: Every record in this file came from a real device that was infected with information-stealing malware. The passwords were captured in plaintext, meaning attackers can use them immediately without any additional effort to crack or decode them. What Was Exposed: The leak contains email addresses, plaintext passwords, and the URLs of the sites those passwords belong to, giving attackers a direct map of which accounts each stolen password can unlock. Why This Matters: Because so many people reuse passwords across multiple sites, a password stolen from one account can often be used to log into email, banking, or shopping accounts elsewhere. This is the basis of credential stuffing, where stolen login pairs are tested automatically across large numbers of websites. How a Stealer Log Like This Works: Stealer logs are produced by malware that infects a victim's device, usually through a pirated download, fake update, or malicious attachment. Once running, it silently harvests saved passwords, autofill entries, and browser session data, then sends it all to the attacker. That data is compiled into a file, in this case named "0-9," and traded or sold in Telegram channels used by cybercriminals. Check If You Are Affected: HEROIC's free breach scanner checks your email against more than 400 billion leaked records, including stealer logs like this one. Run a scan now to see if your credentials were exposed in this leak.