23,846 Records Exposed: Email Users Targeted in Mail Access 24K Leak

HEROIC analysts identified a stealer log labeled "Mail Access 24K Mix Valid," uploaded to a Telegram channel and tracing back to August 20, 2025. The file contains 23,846 verified email access records, each including an email address, a plaintext password, and the login URL for the account. The "Mix Valid" label in the file's own name signals that the seller has already tested these credentials and confirmed they still work, which makes this dump especially valuable to criminals and especially dangerous to the people in it.

Why This Is Dangerous

Because these credentials have already been verified as active, an attacker doesn't need to waste time testing which ones still log in. Every entry in this file is a confirmed, working set of email access details. That turns a large list of stolen data into a ready-to-use tool for breaking into thousands of inboxes immediately, with no guesswork required.

What Was Exposed

• 23,846 email addresses confirmed as active accounts
• Plaintext passwords for each account, stored without encryption
• Login URLs identifying the exact mail service tied to each credential

Why This Matters

The people caught up in this leak are not employees of one hacked company, they are a mix of ordinary email users whose devices were infected with malware at different times and places. That is what makes a "mix valid" dump so dangerous: it targets whoever happened to be unlucky enough to have their browser compromised, regardless of where they bank, shop, or work. With verified email access, attackers can pivot into password resets, credential stuffing on other sites, and outright account takeover, opening the door to identity theft and financial fraud for tens of thousands of people at once.

How a "Mix Valid" Stealer Log Gets Made

Criminals who deal in stealer logs often combine data pulled from many separate infostealer infections into one master file, then run automated checks to filter out dead or duplicate logins. What remains is a "mix valid" list, meaning every credential in it has been confirmed to still work at the time of testing. This curation step is what separates a raw, messy stealer log from a polished product that sells for a premium on Telegram and dark web marketplaces, precisely because buyers know the access is real.

Check If You Are Affected

With almost 24,000 verified email accounts in this single file, the odds that your address is included are not trivial. HEROIC's free breach scanner checks your email against more than 400 billion leaked records, including stealer logs and mail access dumps like this one, so you can find out if your account was part of it and change your password before someone else uses it.