The ZELENKA CLOUD Leak Gave Hackers 6,725 Ready-to-Use Logins

HEROIC analysts identified a stealer log labeled "ZELENKA CLOUD FREE LOGS" uploaded to a Telegram channel on December 24, 2022. The file contained 6,725 records, each pairing an email address with a plaintext password and a related URL, the signature of infostealer malware pulling saved credentials directly off infected devices.

What This Leak Gives an Attacker

Every one of the 6,725 records in this log is a complete, ready-to-use login: an email address, its exact password, and the site it unlocks. Because the passwords were stored and leaked in plaintext, an attacker does not need to crack or guess anything, they can plug the credentials straight into the listed site the moment they get the file, or try the same combination against other popular services in case the password was reused.

What Was Exposed in the ZELENKA CLOUD Leak

• Email addresses
• Plaintext passwords
• URLs of the associated login pages or services

In total, 6,725 records were included in the file.

Why This Matters

A log of this size is exactly the kind of data used in credential stuffing campaigns, where stolen email and password pairs are tested automatically across many other sites. Because each record already ties a password to the exact service it opened, it also gives an attacker a head start on account takeover, and for anyone who reused that password elsewhere, the exposure can extend to financial fraud and identity theft.

How a Stealer Log Like ZELENKA CLOUD Gets Built

Infostealer malware infects a device and quietly copies saved browser passwords and the URLs tied to them before sending everything back to whoever controls the malware. A log of nearly 6,725 records suggests credentials were gathered from a sizable number of infected machines before being compiled and shared under the ZELENKA CLOUD name. Logs like this are routinely traded or resold in underground Telegram channels and dark web forums, which is how a single infostealer campaign can keep circulating years after it first surfaced.

Check If You Are Affected

With over 6,700 accounts in this single log, the odds that your information is included are real. HEROIC's free breach scanner checks your email address against a database of more than 400 billion leaked records, including stealer logs like this one, so you can see what has been exposed and change any reused passwords before someone else does.