HEROIC Analysts Found loginSuccess on Private Telegram Channels

HEROIC analysts identified this stealer log on 24-Mar-2026. The breach exposed 298 records, with stolen data including email addresses, plaintext passwords, and URLs. The source is identified as loginSuccess uploaded by a Telegram User.

Why This Is Dangerous

The name loginSuccess indicates this file contained verified, working credentials: accounts where an attacker already confirmed the stolen email and password combination works. That makes this breach particularly dangerous. Unlike unverified credential dumps, a loginSuccess file means each of the 298 records likely represents an account that was actively compromised at the time of collection. The plaintext passwords and associated URLs give any attacker who downloads this file a ready list of accessible accounts.

What Was Exposed

• Email Addresses
• Plaintext Passwords
• URLs

Why This Matters

Verified credential files like loginSuccess are more valuable to criminals than raw dumps because the guesswork is already done. When accounts have been confirmed as active, attackers can immediately use them for financial fraud, account resale, identity theft, or to reset passwords on connected services. If any victim used the same password elsewhere, those accounts are equally at risk. Even email account access alone can unlock dozens of other services through password reset links.

How Stealer Logs Work

Stealer malware infects a victim's device and silently collects credentials as they are entered into websites. The malware records the URL, username, and password for every site the victim logs into, then packages the data into a log file. This file is sent to the attacker and shared or sold on private Telegram channels. In some cases, attackers run automated tools against the stolen credentials to verify which ones work before distributing the filtered results, as appears to be the case with this loginSuccess file.

Check If You Are Affected

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