Your Data May Be Exposed: CosmoLogs Leaked 28,124 Passwords Online

The CosmoLogs Stealer Log Surfaced on Telegram

HEROIC analysts identified a stealer log file labeled "CosmoLogs 445count" uploaded to a public Telegram channel on June 10, 2025. The file contained 28,124 records, each pairing an email address with a plaintext password and the URL of the service that login unlocks. This was not a breach disclosed by any company. It was a batch of credentials harvested from infected devices and shared for anyone in the channel to download.

Why This Is Dangerous

Every password in the CosmoLogs file was stored in plaintext, so there is no encryption standing between an attacker and a working login. Because each record also lists the exact URL the credential belongs to, an attacker never has to guess where to try it. They can go straight to the listed site, enter the email and password exactly as captured, and be logged in within seconds.

What Was Exposed in the CosmoLogs File

• Email addresses tied to compromised accounts
• Plaintext passwords with no hashing or encryption
• URLs identifying the exact service each login belongs to

Why This Matters for the 28,124 Accounts Involved

Because so many people reuse the same password across multiple accounts, a leak of this size can reach far beyond the sites the credentials were originally stolen from. Attackers run files like CosmoLogs through automated credential stuffing tools, testing each email and password pair against banking sites, email providers, and social media platforms. If any of these 28,124 credentials were reused elsewhere, those other accounts are now at risk of takeover, financial fraud, or identity theft.

How a Stealer Log Like CosmoLogs Gets Built

Stealer malware infects a device through a fake download, a cracked program, or a malicious attachment, then quietly copies saved browser passwords, autofill entries, and session data before sending everything back to whoever controls the malware. Once enough infections accumulate, the results are bundled into a single log file and shared or sold, often through Telegram channels where stolen data changes hands. The "445count" label reflects how these files are batched for distribution rather than tied to any specific company's breach.

Check If You Are Affected

If you want to know whether your email address appears in the CosmoLogs file or any other stealer log, HEROIC's free breach scanner checks your email against a database of more than 400 billion leaked records. Run a free scan, and if you find a match, change that password right away and turn on two-factor authentication wherever it's available.