What Is a Stealer Log? TXT Cloud LOGS_600PCS Exposes 13,199

HEROIC analysts identified a stealer log file posted to a public Telegram channel on November 10, 2025, under the label "TXT Cloud - LOGS_600PCS - 11 November 2025." The file contained 13,199 records of email addresses, plaintext passwords, and service URLs collected from compromised endpoint devices. The upload was made publicly accessible on Telegram, meaning any threat actor monitoring that channel could download and immediately weaponize the data.

Why This Is Dangerous

Stealer logs like this one are particularly hazardous because the passwords are stored in plain, unencrypted text. There is no hash to crack, no encoding to reverse. An attacker reads the file and has working credentials ready to use. With email addresses and associated service URLs also present, attackers can target the exact platforms where victims have active accounts, dramatically increasing the success rate of unauthorized logins.

What Was Exposed

• Email Addresses
• Plaintext Passwords
• URLs (API hosts and accessed service endpoints)

Why This Matters

A single leaked credential creates a chain reaction. Attackers use credential stuffing tools to test stolen email-password combinations against dozens of popular websites simultaneously. Successful logins lead to account takeovers, identity theft, unauthorized purchases, and in some cases, access to employer systems if the same password was used for work. Fraud can begin within hours of a stealer log being posted. The TXT Cloud series naming convention suggests this is part of a recurring operation, not a one-time event, meaning the operators behind it are actively collecting and distributing stolen data on an ongoing basis.

How Stealer Logs Work

A stealer log is the output file of infostealer malware, and understanding how it is created helps explain why it is so dangerous. Infostealer software infects a victim's computer through phishing emails, fake software downloads, cracked applications, or malicious browser extensions. Once running on the device, it silently scans for saved passwords stored in browsers like Chrome and Firefox, captures active session cookies, records typed keystrokes, and reads stored login data from applications. All of this harvested information is compiled into a structured text file called a log. That log is then transmitted back to the attacker's server and later distributed or sold on Telegram channels and dark web marketplaces. The label "TXT Cloud" refers to how these logs are often stored and shared as plain text files through cloud-based delivery systems. The "600PCS" notation likely reffers to the number of individual infected machines, or "pieces," that contributed to this particular batch.

Check If You Are Affected

HEROIC has added this breach to its database of over 400 billion exposed records. Run a free search using the HEROIC breach scanner to find out if your email address appeared in the TXT Cloud LOGS_600PCS file or any other stealer log collection. If your credentials are in there, changing your passwords immediately could prevent an account takeover.