The NINHO PRIVATE MIX Leak Put 933 Stolen Credentials Online in May

On May 29, 2026, HEROIC analysts detected another stealer log file under the "NINHO PRIVATE MIX" label uploaded by a Telegram user. This batch contains 933 compromised records, each pairing an email address with a plaintext password and the URL of the service where the credential was harvested. The file was shared openly on a Telegram channel, making all 933 credential sets immediately available to anyone who downloaded it.

Why Plaintext Passwords With Matching URLs Are Ready-Made Attack Tools

Most stolen credential databases require some effort to exploit. Hashed passwords need to be cracked, and credentials without associated URLs require guesswork about where they work. The NINHO PRIVATE MIX file eliminates both obstacles. Every password is stored in readable plaintext, and every record includes the exact URL where it was captured.

This combination turns each of the 933 records into a complete, ready-to-use login attempt. An attacker can work through the list systematically, testing credentials against the original service and then branching out to other platforms where the victim may have reused the same password.

What Was Exposed in This NINHO PRIVATE MIX Upload

• Email addresses from personal and corporate accounts across multiple providers
• Plaintext passwords stored in fully readable form
• URLs pinpointing the exact website or login portal tied to each credential

Why Repeated Uploads Signal Ongoing Credential Harvesting

The appearance of multiple NINHO PRIVATE MIX files on Telegram indicates an active operation, not a one-time leak. Each new upload represents a fresh batch of stolen credentials, suggesting that the underlying infostealer campaign is still running and producing new data. For anyone whose credentials appear in these files, the risk is not just past exposure but ongoing surveillance of their accounts.

Credential stuffing attacks become more effective with each new batch. Attackers combine multiple dumps to build comprehensive profiles of individual victims, cross-referencing email addresses across datasets to identify password patterns and reused credentials across services.

How Stealer Logs Are Built and Distributed

Stealer logs begin with infostealer malware planted on a victim's device. Common infection vectors include pirated software, malicious browser extensions, and phishing emails containing booby-trapped attachments. Once the malware is running, it scrapes stored credentials from web browsers, capturing the URL, username, and password for every saved login.

The harvested data is organized into structured log files and uploaded to servers controlled by the threat actor. From there, the logs are sorted, filtered, and packaged for sale or free distribution. Telegram has become a popular distribution channel because of its large audience and minimal moderation of cybercrime content.

The NINHO PRIVATE MIX series appears to follow a regular upload schedule, with the operator releasing new batches of stolen credentials as they are collected from freshly infected devices.

Check If Your Credentials Appear in This Dataset

With 933 credential sets now circulating publicly, the affected individuals face immediate risk of account compromise. HEROIC's free breach scanner monitors over 400 billion records from data breaches, stealer logs, and dark web sources. A quick search will show whether your email or password has been exposed in this NINHO PRIVATE MIX upload or any other known breach.

If your credentials are found, change the compromised password on every service where you used it. Enable two-factor authentication wherever possible, and consider using a password manager to generate unique passwords for each account going forward.