The arccardinal.com Leak Has Far Fewer Records, But the Risk Is Real

HEROIC analysts found a small combolist file named “arccardinal.com” uploaded to a Telegram channel on 10 September 2023. Compared to the massive leaks that make headlines, this one is modest: 213 records pairing email addresses with plaintext passwords and the URLs of the accounts they unlock. Size aside, every one of those 213 records belongs to a real person whose login details are now sitting in a file anyone on that Telegram channel can download.

Why This Is Dangerous

The passwords in this file were not hashed or scrambled, they were stored and shared in plain, readable text. That means whoever has this file can log in immediately, with no cracking required, to any account tied to those credentials, provided the password has not since been changed.

What Was Exposed

• Email addresses
• Plaintext passwords
• URLs identifying the site or service each login was used on

Why This Matters

A list of 213 records may look small next to billion-record mega-breaches, but attackers do not need scale to do damage. They run these smaller combolists through automated credential stuffing tools that quietly try each email and password pair against dozens of other popular websites. If any of these 213 people reused a password, that single leaked pair can unlock their email, banking, or social media accounts and open the door to identity theft.

How Combolists Like This Get Made

A combolist is a collection of login credentials gathered from multiple sources, old breaches, phishing pages, or malware, and compiled into one file that criminals trade or give away on platforms like Telegram. The arccardinal.com file fits this pattern exactly: a small, targeted list assembled and shared for anyone looking for working logins to try.

Check If You Are Affected

Even a small leak is worth checking. HEROIC's free breach scanner searches your email against more than 400 billion breached records, including combolists like this one, so you can find out in seconds whether your credentials were exposed and take action before someone else does.