1,165 Plaintext Passwords From the 30_Boss Dump Just Surfaced on Telegram

In June 2023, HEROIC researchers captured and indexed a stealer log file uploaded to Telegram by an actor using the handle 30_Boss. The dataset contained 1,165 records pulled directly from infected endpoints, each bundling an email address, a plaintext password, and the URL of the service targeted during the malware infection. These records were not obtained by breaching a company server. They were harvested silently from real users' devices by information-stealing malware before being packaged and distributed on Telegram.

Why This Is Dangerous

Every record in the 30_Boss dump represents a real, working credential at the time of theft. Stealer logs are fundamentaly different from hashed database leaks because there is nothing to crack. Attackers receive the passwords in the exact form they were used. Combined with the service URLs, the 30_Boss dataset functions as a ready-made account takeover guide. Cybercriminals who acquire this file can begin testing logins against live platforms within minutes, and the success rate is significantly higher than attacks using older, encrypted breach data.

What Was Exposed

• Email Addresses
• Plaintext Passwords
• URLs (targeted service endpoints from infected devices)

Why This Matters

Even 1,165 records can cause significant downstream harm. Credential stuffing tools can test these login pairs against dozens of platforms simultaneously, exploiting the fact that most people reuse passwords. A single successful account takeover can lead to identity theft when an attacker accesses personal communications, financial fraud when saved payment methods are exploited, and further credential harvesting when the compromised account is used to reset passwords on other services. Victims often do not discover the breach until real damage has occured, because no seperate service provider is required to issue a disclosure.

How Stealer Logs Work

Information stealer malware is typically installed through phishing emails, fake software downloads, or malicious browser extensions. Once running on a device, it targets saved browser credentials, session cookies, and autofill data, compressing everything into a structured log file within seconds. That file is then exfiltrated to the attacker's infrastructure and redistributed, in this case through a Telegram channel operated by 30_Boss. The upload makes the data available to anyone who follows the channel, with no requirement to pay or authenticate. Because no corporate server was involved in the breach, victims have no way to recieve an official notification and may remain unaware for months.

Check If You Are Affected

HEROIC has indexed the 30_Boss stealer log in its breach database alongside more than 400 billion other compromised records. A free email search on HEROIC's platform will instantly show whether your adress appears in this dataset or any other breach in the database. Because stealer log breaches never generate official disclosure notices, HEROIC's scanner is often the only practical way to detect this type of exposure. Run a free check now to find out if your credentials were stolen.