The 500 PCS FREE LOGS Stealer Leak Contains More Records Than a Small City’s Population

HEROIC analysts identified a stealer log file uploaded to Telegram on November 5, 2023, labeled "500 PCS - 11.05.23 - FREE LOGS." The file exposed 11,601 records gathered from compromised endpoints. Each record contained an email address, a plaintext password, and the URL of the service where those credentials were used, including API hosts and websites. The fact that the passwords were stored in plaintext means there was no encryption to bypass. Anyone who downloaded the file recieved a fully usable set of login credentials, ready to be used immediately against real accounts.

Why This Is Dangerous

Over 11,000 plaintext username and password pairs in a single file is a significant haul for any attacker. Combined with the associated URLs, each record is essentially a roadmap telling an attacker exactly which service to target. That means no guessing, no cracking, no waiting. An attacker can test these credentials within minutes using automated tools, gaining access to email inboxes, cloud accounts, business portals, and financial services. Because the file was shared freely on Telegram, it was not limited to a single threat actor. It could have been downloaded by hundreds or even thousands of people.

What Was Exposed

• Email Addresses
• Plaintext Passwords
• URLs (API hosts and compromised websites)

Why This Matters

When plaintext passwords leak alongside email addresses and service URLs, the consequences ripple far beyond the original breach. Credential stuffing attacks use this exact type of data, cycling through leaked pairs across banking sites, email providers, and shopping platforms until one works. Account takeover leads to financial fraud, identity theft, and in many cases, access to seperate accounts that share the same password. The fact that this log was distributed freely, rather than sold, suggests the attacker's goal was volume and reputation, not exclusivity, meaning the data spread quickly and widely before most victims ever knew something had occured.

How Stealer Logs Work

Stealer logs are produced by infostealer malware, software designed to silently harvest credentials from infected devices. After a user clicks a malicious link, downloads a fake app, or opens a weaponized file attachment, the malware installs itself and begins scanning. It collects saved passwords from browsers, active session cookies, autofill data, and API keys. All of this is packaged into a structured log file and sent back to the attacker's server. These logs are then sorted, cleaned, and distributed, often through Telegram channels dedicated to the free or paid sharing of stolen credentials. The label "FREE LOGS" in this file's name signals it was deliberately made available at no cost to attract attention and build the uploader's reputation in underground communities.

Check If You Are Affected

HEROIC's free dark web scanner covers more than 400 billion exposed records, including Telegram stealer logs like this one. If any of your email addresses or passwords appeared in this file or thousands of others like it, the scanner will flag it immediately. Do not wait to find out the hard way. Search your email now at HEROIC.com and take action before someone else does.