Search Your Email: MARVEL_PRIME Telegram Log Exposed 15,523 Accounts

HEROIC analysts discovered the MARVEL_PRIME stealer log in September 2023, when a Telegram user uploaded a file containing 15,523 records harvested from infected devices. The exposed data included email addresses, plaintext passwords, and URLs, making this a direct threat to anyone whose credentials were captured by the underlying malware before the log was shared publicly.

Why This Is Dangerous

Stealer log data is among the most actionable information attackers can aquire. Because the passwords are stored in plaintext, no cracking is required. Criminals can take this list of email and password combinations and immediately attempt to log in to banking sites, email providers, social media platforms, and any other service where victims reuse the same credentials. The URLs included in the log also reveal which specific sites and services were targeted, allowing attackers to focus their efforts with precision.

What Was Exposed

• Email Addresses
• Plaintext Passwords
• URLs

Why This Matters

When email addresses and plaintext passwords are exposed together, the risk of credential stuffing attacks becomes very real. Attackers use automated tools to test these login pairs across hundreds of websites at once. A single compromised credential can lead to account takeover, identity theft, and financial fraud. If the same password is used on a banking or shopping site, the consequences can be immediate and severe. Many victims do not recieve any notification that their credentials have been stolen, leaving them exposed for months or years.

How Stealer Log Breaches Work

Stealer logs are created by a type of malware called an information stealer, which silently infects a device and harvests saved passwords, browser session data, and other sensitive information. The malware typically spreads through phishing emails, malicious downloads, or compromised software. Once installed, it transmits the collected data back to the attacker, who then packages it into log files. These logs are often sold or shared on dark web forums and private Telegram channels. The process is largely automated, meaning a large number of victims can be affected very quickly after a malware campaign begins.

Check If You Are Affected

If your email address appeared in the MARVEL_PRIME stealer log, your credentials may already be in the hands of bad actors. HEROIC offers a free breach scanner that searches across more than 400 billion exposed records to tell you whether your information has been compromised. Checking your exposure is the first step toward protecting yourself. Search your email now to see if you were affected by this or any other known data breach.