The SatanFireLogs Leak Gave Hackers Plaintext Passwords and API Keys

In November 2023, HEROIC analysts identified a stealer log file uploaded to Telegram by a user operating under the SatanFireLogs alias. This batch -- one of several uploaded around the same time -- contained 3,132 records pulled from compromised endpoints, including email addresses, plaintext passwords, and URLs pointing to API hosts and internal systems. Unlike encrypted credential dumps that require cracking before use, every password in this file was immediately readable. Threat actors downloading this data could begin attempting logins the moment they opened the file.

What Hackers Can Do With SatanFireLogs Data

Plaintext passwords eliminate the most time-consuming step in most account takeover attacks. An attacker with this file does not need to run a cracking tool or wait for a hash to fall. They can take the email address and password pairs, run them against popular services through credential stuffing tools, and begin gaining access to accounts within minutes. The API host URLs included in this dump go even further: they identify specific internal systems and developer endpoints that an attacker can probe directly. A single valid API key can provide access to cloud storage, code repositories, or data pipelines without any need to phish or social-engineer anyone. The attacker becomes an authorized user the moment they authenticate with stolen credentials.

What Was Exposed: SatanFireLogs 135pcs Data Types

• Email Addresses -- used to target victims directly and as usernames across services
• Plaintext Passwords -- no decryption required, ready for immediate credential stuffing
• URLs -- including API endpoints and internal host addresses revealing infrastructure

Why Stealer Log Data Spreads So Quickly

Once a stealer log file is posted to Telegram, it is nearly impossible to contain. Telegram channels dedicated to stolen data can have thousands of subscribers, and files are frequently forwarded, archived, and re-shared across multiple channels. Each redistribution puts the data in front of a new set of threat actors who may have never seen the original post. Unlike dark web marketplaces that require payment or vetting, many Telegram channels distribute stealer logs for free, which means the barrier to aquiring this data is effectively zero. Security researchers have documented stealer log files from 2022 and 2023 still actively traded and referenced in 2025, demonstrating that the shelf life of leaked credentials is far longer than most victims realise.

How Stealer Log Malware Works

Information stealers are a category of malware designed to harvest credentials silently from infected machines. They are commonly delivered through phishing emails, fake software downloads, pirated applications, or malicious browser extensions. Once running on a device, the stealer scans for saved passwords in browsers like Chrome and Firefox, reads credentials stored in desktop applications, and captures any API keys or tokens found in configuration files. All of this data is packaged into a structured log file and transmitted to the attacker's server. The infection itself can occure in under a minute, and because the malware does not typically display any visible symptoms, victims often have no idea they have been compromised untill they start receiving account breach notifications or notice unauthorized activity.

Check If You Are Affected by the SatanFireLogs Breach

If your credentials appeared in this stealer log dump, your accounts may already be at risk. HEROIC's free breach scanner checks your email against more than 400 billion exposed records, including stealer log files like this one from Telegram. A scan takes less than a minute and will tell you immediatley if your data is in circulation. If you are affected, change affected passwords now, enable two-factor authentication wherever possible, and revoke any API keys that may have been stored on compromised devices. The sooner you act, the less damage an attacker can do with your exposed credentials.