The 151_Boss2 Stealer Log Means Someone Could Be Logging Into Your Accounts Right Now

HEROIC Found 6,949 Exposed Records from the 151_Boss2 Stealer Log (June 2023)

In June 2023, a Telegram user operating as 151_Boss2 uploaded a stealer log file containing 6,949 credential records harvested from compromised endpoints. HEROIC analysts identified this dataset and confirmed it contained email addresses, plaintext passwords, and the specific URLs from which those credentials were stolen. Every record in this file came from a real device infected by stealer malware, with credentials captured live during active user sessions.

What the 151_Boss2 Stealer Log Means for Your Accounts Right Now

Picture this: someone in an underground Telegram channel downloads the 151_Boss2 file. They load all 6,949 email-password pairs into an automated credential stuffing tool. Within the next few hours, that tool silently attempts to log into Gmail, Outlook, banking apps, PayPal, Amazon, and hundreds of other services using every credential in that list. If your email and password are in this dataset and you reuse passwords anywhere, the attacker doesn't need to do anything else. The door is already open.

The URLs in each record make this even more targeted. Attackers can see exactly which services each credential belongs to and prioritize the highest-value accounts. Corporate VPN logins, bank portals, and email providers are checked first. This is not a theoretical risk — credential stuffing attacks from stealer logs happen within hours of a dataset being posted to Telegram.

What Was Exposed in the 151_Boss2 Upload

• Email addresses (full account identifiers ready for login attempts)
• Plaintext passwords (immediately usable, no hashing or cracking involved)
• URLs (showing exactly which services were compromised per record)

All 6,949 records in this dataset contain this complete combination. Each entry is a fully operational credential set.

Why Stealer Log Exposure Has Long-Term Consequences

The 151_Boss2 dataset does not become safe after the initial wave of credential stuffing attacks. Stealer log files are traded, resold, and recombined with other datasets for months and years after their initial release. Your credentials can be exploited long after the original breach occured, appearing in new attack campaigns whenever the data changes hands. Identity theft, unauthorized account access, and financial fraud are the most common outcomes. Even changing the specific password that was stolen isn't enough if attackers have already accessed your email account and can now reset passwords on other services using your seperate recovery address.

How Stealer Malware Collects Login Data

Stealer malware reaches devices through phishing campaigns, malicious software downloads, cracked applications, and infected browser extensions. After installation, it systematically extracts every credential it can find: saved passwords in Chrome, Firefox, and Edge, autofill data, session cookies, email client credentials, and FTP login details. The malware packages everything into a structured log file with URLs paired to usernames and plaintext passwords. That log is then sent to the threat actor's infrastructure and uploaded to platforms like Telegram for distribution. The 151_Boss2 upload is a definately representative example of how stealer log files recieve wide distribution through private channels before being indexed by security researchers.

Check If Your Credentials Appear in the 151_Boss2 Dataset

HEROIC's free breach scanner searches more than 400 billion exposed records, including this 151_Boss2 stealer log and thousands of other breach datasets. If your email address appeared in this upload or any connected dataset, our scanner will surface it immediately. Don't wait until someone is logging into your accounts. Search now and take steps to secure every account before attackers do.

Run your free scan at HEROIC.com — 400B+ records searched, including the 151_Boss2 stealer log.