13,530 Plaintext Credentials Exposed in CuckooLogsPublic Breach

HEROIC analysts have confirmed a stealer log exposure from December 2025 involving 13,530 records uploaded publicly via Telegram. The CuckooLogsPublic dataset contains email addresses, plaintext passwords, and URLs harvested from infected devices. This data was made freely available to any criminal who knew where to look, substantially widening the pool of potential attackers with access to these credentials.

Plaintext passwords are the most dangerous element of this breach. Unlike hashed passwords that require cracking time, these work instantly. Add in the specific URLs showing which services were targeted, and attackers have a precise, ready-to-use attack package. Victoms who reused passwords across sites face compounded exposure beyond just the original captured accounts.

What Was Leaked: The CuckooLogsPublic Data Breakdown

• Email Addresses - Victim login identifiers usable across banking, email, and shopping platforms
• Plaintext Passwords - Fully readable passwords that require zero cracking or decoding
• URLs - The exact websites and services where credentials were harvested
• Record Count - 13,530 compromised records
• Leak Date - December 7, 2025
• Origin - Telegram public upload by anonymous threat actor

How CuckooLogsPublic Data Fuels Account Fraud

Credential stuffing tools automate the process of testing these email and password pairs against dozens of popular services at once. Banking apps, email providers, crypto wallets, and retail accounts all become targets simultaneously. Plaintext passwords make this process faster and more successfull because there is no decryption bottleneck.

When stuffing leads to a successful login, account takeover follows quickly. Attackers update recovery contact details, drain stored payment methods, and lock out the original owner. Some compromised accounts get sold on dark web marketplaces. The URL data in this dataset tells attackers exactly which services to prioritize, making these attacks more efficient from the start.

Stealer Log Explained for Non-Technical Readers

A stealer log is a file produced by malware that secretly runs on someone's computer or phone. The Cuckoo infostealer records browser-saved passwords, captures credentials typed into login forms, and packages everything into a data file. That file is the log.

Criminals then share these logs on Telegram channels, sometimes freely and sometimes for sale. The "Public" designation on this dataset indicates it was shared at no cost, meaning a large number of bad actors could have downloaded and acted on this data within days of it being posted. The victim rarely knows any of this happened until their accounts start showing unauthorized activity.

Free Breach Scan: Were You in CuckooLogsPublic?

Your email address may be among the 13,530 records in this dataset. HEROIC has indexed over 400 billion compromised records across thousands of breaches and can check your exposure instantly at no cost.

Run a free breach scan at HEROIC today and find out whether your credentials appeared in CuckooLogsPublic or any other known breach. Early detection gives you the time to change passwords and lock down accounts before attackers take advantage.