7,427 Plaintext Passwords From the 151_Boss2 Telegram Dump Just Surfaced

In June 2023, HEROIC's threat intelligence analysts identified a stealer log file uploaded to Telegram by a user operating under the alias 151_Boss2. The dataset contained 7,427 records and included email addresses, plaintext passwords, and URLs pointing to the services where the credentials were captured. This upload is consistent with a pattern of infostealer operators packaging harvested logs and distributing them through private Telegram channels for profit or notoriety.

Why This Is Dangerous

Plaintext passwords require no decryption and are immediatly usable in automated credential stuffing attacks. When combined with email addresses and target URLs, attackers have a complete toolkit to access victim accounts. The inclusion of endpoint URLs makes this data particularly dangerous, as it tells cybercriminals exactly which banking portals, email services, and corporate systems the victims were accessing at the time of infection. This level of detail accelerates targeted attacks significantly.

What Was Exposed

The 151_Boss2 Telegram stealer log exposed the following data types across 7,427 compromised records:

• Email Addresses
• Plaintext Passwords
• URLs (endpoint and API host addresses)

Why This Matters

With plaintext passwords and matching email addresses in hand, cybercriminals can launch credential stuffing campaigns against hundreds of popular websites at once. Many victims use the same email and password combination accross banking, social media, and e-commerce platforms. A single successful login can expose financial accounts, personal communications, and even workplace systems. The consequences include identity theft, unauthorized purchases, account lockout, and large-scale financial fraud.

How Stealer Log Breaches Work

Infostealer malware is typically delivered via phishing emails disguised as legitimate notifications, pirated software packages, or malicious advertisements. Once installed on a victim's device, the malware operates silently in the background, scanning browsers for saved login credentials, session tokens, and autofill data. It records the associated URL for every credential it harvests, then bundles everything into a structured log file. These logs are uploaded to Telegram channels or sold on dark web marketplaces. The entire infection and exfiltration process can occure within minutes, leaving victims with no immediate warning.

Check If You Are Affected

If your email address was captured by the 151_Boss2 stealer log, your credentials are likely already circulating among cybercriminals. HEROIC's free breach scanner checks your email against more than 400 billion exposed records to tell you exactly what has been compromised. Take action now before your accounts are targeted.