How the prdscloud 33logs Stealer Malware Led to 1,195 Stolen Logins on Telegram

HEROIC analysts flagged a stealer log file labeled "prdscloud 33logs" that was uploaded to a public Telegram channel on November 4, 2023. The file contained 1,195 records taken directly from compromised devices, each entry pairing an email address with a plaintext password and the URLs of sites the infected machine had accessed. This data was not stolen from a company server -- it was silently harvested from individual users' computers by malware running without their knowledge, then shared publicly on Telegram for anyone to download.

Why This Is Dangerous

Plaintext passwords require zero effort to exploit. An attacker who downloads this file already has everything they need to attempt logins immediately. Because the log also includes URLs showing which services the victim used, attackers know exactly where to try those credentials first. A single working login can lead to email account access, banking fraud, or takeover of social media profiles. The data was shared openly on Telegram, where it could be recieved and used by thousands of bad actors within minutes of being posted.

What Was Exposed

• Email Addresses
• Plaintext Passwords
• URLs (websites and services accessed from infected devices)

Why This Matters

When email and plaintext password pairs leak together, credential stuffing attacks become almost effortless. Automated tools can test these combinations across hundreds of websites in minutes. Victims rarely recieve any warning until they are locked out of their accounts or discover unauthorised charges. The URLs exposed in logs like this one reveal which financial services, email providers, and platforms the victim used, giving attackers a roadmap for maximising the damage from a single stolen login. Identity theft and financial fraud are the most common outcomes.

How Stealer Log Breaches Work

Info-stealer malware is installed on a victim's device without their knowledge, usually through a phishing email, a fake software installer, or a malicious browser extension. Once running, the malware scans the device for passwords saved in the browser, active session cookies, autofill data, and the history of sites visited. All of this is compiled into a log file and sent back to the attacker. The attacker then sells the log on dark web markets or, as occured with the prdscloud 33logs file, uploads it to Telegram to share with a broad audience. The naming convention "prdscloud 33logs" suggests the malware targeted users connected to a specific application or cloud service. Seperate from traditional company database breaches, these attacks hit individual people directly and leave very little trace.

Check If You Are Affected

HEROIC's free scanner checks your email address against more than 400 billion exposed records, including stealer logs like prdscloud 33logs. If your credentials were captured in this breach or any other known leak, you will receive an immediate alert so you can change your passwords and lock down your accounts before an attacker uses them. Visit HEROIC now to run your free scan.