Search Your Email: The YAHOO NEW 0829 Dump Exposed 171,749 Accounts

HEROIC analysts identified this stealer log on January 14, 2023. The breach exposed 171,749 records, with stolen data including email addresses, plaintext passwords, and URLs. The source is identified as YAHOO NEW 0829.

Why This Is Dangerous

Yahoo accounts are connected to dozens of downstream services, from email-based sign-ins to financial alerts and account recovery workflows. A compromised Yahoo inbox gives attackers the ability to intercept password reset emails, access connected applications, and monitor personal communications without the account holder being aware. With 171,749 records in this stealer log, the cumulative downstream risk across all affected accounts is substantial.

What Was Exposed

• Email Addresses
• Plaintext Passwords
• URLs

Why This Matters

Yahoo email addresses are frequently used as a primary login for other services. When criminals obtain the username and plaintext password for a Yahoo account, they can test that same combination against banking portals, social media platforms, and retail accounts in minutes. If passwords were reused, a single stolen credential can cascade into access across an entire digital identity.

How Stealer Logs Work

Stealer logs are created by malware that quietly installs itself on a victim's device, often through a fake software download, a phishing email, or a compromised website. Once active, the malware captures saved browser passwords, session cookies, and autofill data without the victim knowing anything is wrong. That harvested data is packaged into a log file and uploaded to criminal infrastructure, where it is sold, traded, or published on dark web forums. The attack targets the device itself, not a company server, so any individual with a computer or phone is a potential victim.

Check If You Are Affected

HEROIC offers a free breach scanner that searches 400 billion records from known breaches. Search your email address now to find out if your credentials appear in this breach or others. The scan is free and takes seconds.