The chasbutter Leak Contains More Records Than a Small Town Has Residents

HEROIC analysts identified a stealer log file uploaded to a public Telegram channel on January 18, 2025. The file, named chasbutter, contained 2,300 records harvested from compromised user endpoints. Each record paired an email address with a plaintext password and the URL of the service where those credentials were used, giving attackers an immediately actionable dataset.

Why This Is Dangerous

Plaintext passwords require zero effort to use. There is no decryption, no cracking, no waiting. An attacker who downloads this file can start attempting logins within minuets. The inclusion of service URLs makes it even more targeted because criminals already know exactly which site each password belongs to, removing the guesswork from their attacks entirely.

What Was Exposed

• Email Addresses
• Plaintext Passwords
• Service URLs

Why This Matters

Stealer logs circulating on Telegram are a direct pipeline into credential stuffing campaigns. Attackers run automated tools that test these email and password combinations against banking sites, email providers, shopping platforms, and social media at scale. Password reuse is the main vulnerability here. If the same password protects multiple accounts, a single exposed record in this chasbutter file can lead to a domino effect of account takeovers and potentialy identity theft.

How Stealer Log Breaches Work

Stealer logs come from malware infections on individual computers. The malware, often installed through a fake software download or phishing email, sits quietly in the background and captures every password saved in the browser or typed into a login form. It also records the website address so the attacker knows exactly what each password unlocks. These captured credentials are bundled into log files and uploaded to distribution channels like Telegram, where other criminals can download and use them. The chasbutter file is one of thousands of such logs circulating at any given time.

Check If You Are Affected

Your email address may be in this file without you knowing it. HEROIC's free dark web scanner checks your email against more than 400 billion exposed records from breaches, stealer logs, and data dumps just like this one. Run a free scan today and find out if your credentials are already in the hands of criminals before they have a chance to use them.