If You Reuse Passwords, 12a 13’s 181,855 Records Should Worry You

HEROIC analysts identified a stealer log file labeled 12a 13 that was uploaded to a Telegram channel on July 18, 2026. The file contained 181,855 records made up of email addresses, plaintext passwords, and the URLs those credentials were used on, making it one of the larger stealer log uploads tracked recently. Why This Is Dangerous: Every password in this file was captured and leaked in plaintext, so an attacker does not need to crack, guess, or decode anything. They can pull an email, password, and matching site straight from the log and try logging in immediately. At this scale, that is 181,855 separate opportunities for an attacker to get into someone's account. What Was Exposed: - Email addresses - Plaintext passwords - URLs identifying which site each password belongs to Why This Matters: If you reuse the same password across multiple accounts, a leak like this is exactly what puts you at risk. Attackers take files like 12a 13 and run the email and password pairs against banking sites, email providers, and shopping accounts using automated tools, a tactic called credential stuffing. One reused password is often all it takes to lose control of an email account, a bank login, or a social media profile. How a Stealer Log Like This Works: A stealer log comes from malware that infects a device, quietly pulls saved browser passwords, autofill entries, and session data, and sends it all back to whoever controls the malware. That person then compiles the results into a file, in this case one containing 181,855 records, and uploads it to Telegram or a dark web marketplace where other attackers can download and use it right away. Check If You Are Affected: HEROIC's free breach scanner checks your email against more than 400 billion leaked records, including large stealer logs like this one, so you can find out in seconds if you were exposed. Run a free scan now and change any password you've used on more than one site.