Inside the Cyworld Stealer Log: How Malware Harvested 1,585 Passwords

HEROIC analysts found a stealer log dataset tied to cyworld 1.com that was uploaded to a Telegram channel on June 10, 2026. The file contains 1,585 records taken directly from infected devices, including email addresses, plaintext passwords, and the URLs of the login pages those credentials open. Cyworld is a long-running social networking platform, and this leak shows exactly how malware turns everyday browsing habits into a ready-made list of stolen logins.

Why This Stealer Log Is Dangerous

Every password in this file sits in plaintext, exactly as typed by the account holder, and is matched to the exact site it unlocks. There is no cracking or decoding required. An attacker can open the file and immediately see which login belongs to which service, making a cyworld 1.com account as easy to access as copying and pasting.

What Was Exposed in the Cyworld Stealer Log

• Email addresses tied to infected devices
• Plaintext passwords for those accounts
• URLs identifying the exact login pages the credentials belong to

Why This Matters for the 1,585 People Affected

Social media accounts often connect to personal messages, photos, and linked contact information. If any of the 1,585 people in this file reused their password on other accounts, credential stuffing could give an attacker access to personal email, banking, or shopping logins as well. Account takeover and identity theft become real risks once a working plaintext password like this is exposed.

Inside a Stealer Log: How Malware Harvests Passwords

Stealer log malware infects a device through fake downloads, cracked software, or malicious attachments. Once running, it quietly scrapes every password saved in the browser along with autofill data and session cookies, then packages it all into a single log file sent back to the attacker. These logs are then traded, sold, or dumped in Telegram channels, exactly where HEROIC analysts found this one.

Check If You Are Affected

If you have a cyworld account or think you might be part of this stealer log, do not wait to find out. HEROIC's free breach scanner checks your email against a database of more than 400 billion leaked records, including stealer logs like this one, so you can confirm your exposure and secure your accounts right away.