Researchers Log a Single Credential in the ‘200 mars proxy’ File

In August 2025, HEROIC analysts found a file called 200 mars proxy uploaded by a Telegram user. Unlike most files in this category, it contains just a single record: one email address paired with a plaintext password and a login URL. This is one of the smallest exposures HEROIC has logged, and the data shows no evidence of a large scale breach behind it. Why This Is Dangerous: A single leaked credential may sound insignificant, but if it is yours, the risk is exactly the same as if it were one of a million. Anyone with access to this file can attempt to log into the affected account immediately, since the password is stored in plaintext. What Was Exposed: - One email address - One plaintext password - The URL tied to that login Why This Matters: Files this small are often test uploads, samples, or leftovers from a larger operation, such as a proxy or credential checking tool referenced in the file's name. Regardless of scale, the account owner faces the same exposure as anyone caught in a much larger breach. How This Listing Works: Small, single-entry files like this one often surface as samples that sellers post to prove a larger list is real, or as byproducts of tools like proxy and credential checkers being tested. The name mars proxy suggests a connection to a proxy service used in credential testing workflows. Check If You Are Affected: Even one exposed credential is worth checking. Use HEROIC's free breach scanner to see if your email appears in this leak or any of the more than 400 billion other records on file.