The ONI BEST LOGS Breach Happened in 2023. The Data Is Still Out There.

HEROIC analysts identified a stealer log file uploaded to Telegram in July 2023 under the name ONI BEST LOGS. The file exposed 11,772 records containing email addresses, plaintext passwords, and URLs harvested from infected devices. This data sat in circulation for years before being indexed in publicly accessible threat intelligence databases, meaning victims may have had no idea their credentials were compromised.

Why This Is Dangerous

Stealer logs are among the most actionable data types in the cybercriminal ecosystem. Because passwords are stored in plaintext, attackers do not need to crack anything. They can take an email and password pair and immediately attempt to log into dozens of popular services. The URLs included in this log also reveal exactly which websites the victim was signed into at the time of infection, giving attackers a precise roadmap of where to try those credentials first.

What Was Exposed

• Email Addresses
• Plaintext Passwords
• URLs (websites visited or logged into at time of infection)

Why This Matters

When plaintext passwords are leaked alongside email addresses and visited URLs, the risk is immense. Attackers use automated tools to test these credential pairs across hundreds of services in what is known as credential stuffing. A single compromised password that is reused across accounts can lead to full account takeover, identity theft, and financial fraud. Many victims do not recieve any notification that their data was taken, leaving them exposed for months or even years.

How Stealer Log Breaches Work

Stealer logs are created by malware that infects a device, often through phishing emails, malicious downloads, or compromised software. Once installed, the malware silently collects saved passwords from browsers, active session cookies, and a list of URLs the user has visited. This data is then packaged and sent to the attacker or uploaded to a channel like Telegram for sale or free distribution. The victim's device may appear to function normally throughout the entire process, making detection very difficult. It is definately one of the more dangerous forms of credential theft because the data is already in usable form.

Check If You Are Affected

If you believe your credentials may have been exposed in the ONI BEST LOGS stealer log or any other breach, you can check for free using HEROIC's breach scanner. HEROIC has indexed over 400 billion records across thousands of breaches, giving you one of the most comprehensive views of your personal exposure available anywhere. Checking takes only seconds and could help you get ahead of an account takeover before it occured.