321 Plaintext Passwords from Brazilian IP BR170.79.54.240 Leaked on Telegram

HEROIC analysts found a stealer log file uploaded to Telegram on March 15, 2025, originating from Brazilian IP address BR170.79.54.240. An anonymous Telegram user shared the file, which contained 321 records holding email addresses, plaintext passwords, and URLs scraped from infected endpoints. The inclusion of unencrypted passwords alongside specific site URLs means attackers have a complete, ready-to-use credential kit requiring no extra steps to weaponize.

Why This Is Dangerous

Because the passwords in this log were stored and transmitted in plaintext, anyone who downloaded the file can immediately start testing those credentials on other services. Attackers do not have to guess or crack anything. They can run automated credential stuffing tools against banking sites, email providers, and shopping platforms within hours. The URLs in each record also tell attackers exactley which sites the victims used, removing any guesswork about where to try the stolen logins.

What Was Exposed

• Email Addresses
• Plaintext Passwords
• URLs (websites and services accessed by victims)

Why This Matters

Stealer logs like this one feed directly into the credential stuffing economy. Once credentials land in a Telegram channel, they are scraped and resold on dark web markets within hours. From there, attackers use them for account takeovers, identty theft, fraudulent purchases, and unauthorized access to workplace systems. If a victim reused the same password across multiple sites, the damage multiplies fast. Each of the 321 records in this log represents a real person facing that risk.

How Stealer Logs Work

Stealer malware typically arrives on a victim's device disguised as a useful program, a game mod, or an email attachment. Once installed, it runs silently in the background and captures every password the user types or has saved in their browser. It also records which websites they visit and what login credentials they use. The harvested data is packaged into a log file and sent to the attacker's infrastructure. In this case, the log was then shared by a Telegram user, making 321 records from a Brazilian endpoint available to anyone in that channel. The BR prefix in the IP address confirms the geographic origin of the compromised device.

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