How Malware Led to 296 Stolen Logins in the Valid 1 Dump

In late December 2024, HEROIC's dark web monitoring systems detected a stealer log file called "Valid 1" circulating on Telegram. The name itself is a signal to cybercriminals: the 296 credentials inside have been tested and confirmed to be working at the time of upload. Each record contains an email address, a plaintext password, and the URL from which the login was stolen, representing 296 verified entry points into real people's accounts.

Why Unencrypted Passwords Demand Immediate Action

The credentials in Valid 1 are not protected by any form of encryption. They are stored as readable text, which means attackers can use them directly without any cracking or decryption step. When a file is explicitly labeled "valid," it signals that the threat actor has already verified these credentials against live services. For the 296 people affected, the question is not whether their accounts can be accessed — it is whether someone already has.

What Was Exposed

• Email Addresses — verified login identifiers across various online services
• Plaintext Passwords — confirmed working and stored without any protective hashing
• URLs — the specific websites and services each credential was stolen from

Verified Credentials and the Credential Stuffing Pipeline

Unlike raw, unfiltered credential dumps, a file labeled "Valid" has already been through a filtering process. The threat actor tested each email-password pair and removed entries that no longer work. This makes the remaining 296 records extremely valuable for credential-stuffing attacks because the success rate is far higher than with unverified data. Attackers can feed these credentials into automated tools with confidence that many will grant immediate access to accounts across multiple platforms.

The Journey from Infected Device to Telegram File

The story of each credential in Valid 1 begins with a malware infection. Infostealer trojans like RedLine, Vidar, or Raccoon are typically delivered through phishing emails, malicious ads, or fake software downloads. Once on the victim's device, the malware extracts every credential saved in the browser, records autofill data, and captures session cookies. The harvested data is sent to a command-and-control server, where it is sorted, validated against live services, and packaged into collections like Valid 1 for distribution on Telegram.

Check If Your Credentials Were Exposed

A "valid" label means these credentials were recently confirmed as working, making fast action critical. HEROIC's breach scanner lets you search more than 400 billion compromised records to discover whether your email or password has been exposed in this or any other leak. Checking takes only seconds and could be the difference between keeping your accounts secure and losing them to attackers who already know your password works.