Yahoo Part2 12 Combolist: 106,066 Logins Hit the Dark Web

Yahoo Part2 12: Combolist Exposes 106,066 Records

HEROIC analysts identified a combolist named "Yahoo Part2 12" that a Telegram user uploaded on 23 March 2023. The file contained 106,066 records pairing email addresses with plaintext passwords, along with associated URLs marking where each credential pair was originally used.

Why This Is Dangerous

Every one of the 106,066 passwords in this list is stored in plaintext, so an attacker can start using them immediately, with no cracking step needed. Because many of these addresses appear to be Yahoo accounts, a compromised inbox can be used to reset passwords on connected banking, shopping, and social media accounts, multiplying the damage far beyond the original leak.

What Was Exposed

• Email addresses
• Plaintext passwords
• Associated URLs

Why This Matters

A list of over 106,000 records is large enough to power serious credential stuffing campaigns. Because so many people reuse passwords across different accounts, a single leaked email-and-password pair can lead to account takeover, financial fraud, or identity theft well beyond the Yahoo account it was originally tied to.

How Combolists Work

A combolist compiles email-or-username-and-password pairs, typically gathered from older breaches, phishing pages, or malware infections, then packaged for sale or free distribution. Criminals load these files into automated tools that test every pair against dozens of websites at once, relying on the fact that password reuse will unlock at least some accounts. Telegram remains a preferred channel for these files because uploads happen instantly with little oversight.

Check If You Are Affected

If you have a Yahoo account, or have reused a Yahoo password anywhere else, it is worth checking your exposure now. HEROIC's free breach scanner searches a database of more than 400 billion leaked records, including this combolist, so you can find out in seconds and update any passwords you have reused elsewhere.