If You Reuse Passwords, the CHEETAH Leak Should Worry You

HEROIC uncovered a stealer log collection labeled "CHEETAH Fresh Checked Mail Access" that surfaced on Telegram in March 2025. This dump contains 2,095 freshly validated email credentials paired with plaintext passwords and the specific URLs where those credentials were captured, indicating active and recently verified account compromises.

Plaintext Passwords Offer Zero Protection

Every password in this dump is stored in readable plaintext, meaning attackers face no technical hurdle to using them. There is no hashing algorithm to reverse, no encryption layer to defeat. The moment someone downloads this file, they have everything needed to attempt logins on the exposed accounts and any other service where those same passwords might be used.

What Was Exposed

• Email Addresses — providing the username half of login credentials
• Plaintext Passwords — stored in clear text, ready for immediate misuse
• URLs — identifying the exact websites and services compromised

Password Reuse Turns One Breach Into Many

The greatest danger from a leak like this is not the single account that was originally compromised, but the ripple effect. When people reuse the same password across their email, bank, and social media accounts, a single stolen credential becomes a skeleton key. Credential stuffing bots systematically test these leaked pairs against thousands of websites, and the success rate is disturbingly high.

What Are Stealer Logs and How Are They Created

Stealer logs originate from infostealer malware that runs covertly on compromised computers and mobile devices. The malware intercepts credentials as they are typed, pulls saved passwords from web browsers, and harvests session tokens that can bypass two-factor authentication. These collected credentials are packaged into log files and shared on Telegram, where threat actors use them for account takeover campaigns.

Check If Your Credentials Were Exposed

Do not assume you are safe just because this dump is small. Even a single compromised credential can lead to cascading account takeovers. HEROIC maintains a breach database spanning over 400 billion records. Use the HEROIC breach scanner to check whether your email or password appears in this dump or in any other known breach, and take immediate steps to update any compromised credentials.