Argentina Base 0925 Leak Exposed 339,528 Stolen Passwords

HEROIC analysts identified a large stealer log dataset labeled "ARGENTINA BASE 0925," uploaded to a Telegram channel on February 24, 2023. The file contains 339,528 records made up of email addresses, plaintext passwords, and the URLs of the sites those credentials were used on, making it one of the larger country-specific logs HEROIC has tracked from this source.

Why This Is Dangerous

At this scale, the danger isn't just that one person's password is exposed, it's that hundreds of thousands of plaintext credentials are sitting in a single file, each one paired with the exact website it unlocks. An attacker doesn't need to crack or guess anything. They can work through the list and attempt to log in directly, and the sheer volume means automated tools can process the entire file in a short amount of time.

What Was Exposed

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

Why This Matters

With 339,528 plaintext credentials tied to specific login pages, the immediate risk is widespread account takeover across every service represented in the file. Because so many people reuse passwords, attackers can also run large-scale credential stuffing campaigns using this dataset, testing the same email and password combinations against banking, email, and social media platforms far beyond the original sites.

How Stealer Logs Work

Stealer logs come from infostealer malware that infects devices through phishing emails, pirated software, or malicious downloads. The malware silently extracts saved browser passwords, autofill data, and active sessions, then compiles everything into a log file. Large regional collections like "ARGENTINA BASE 0925" are often built by combining many individual infections into one dataset before being shared or sold on Telegram, giving buyers a concentrated pool of working credentials tied to a specific region.

Check If You Are Affected

With over 339,000 accounts caught up in this single leak, checking your exposure is worth the thirty seconds it takes. HEROIC's free breach scanner searches a database of more than 400 billion exposed records to give you an instant answer and clear steps if your information is found.