Inside the chass.utoronto.ca Stealer Log: 1,743 Logins Harvested

A Stealer Log Tied to chass.utoronto.ca Surfaced on Telegram

HEROIC analysts identified a stealer log file dated 10-Jun-2026 that was uploaded to a Telegram channel by an individual user. The file contained 1,743 records connected to chass.utoronto.ca, including email addresses, plaintext passwords, and the URLs of the login pages where those credentials were entered. Because the passwords were stored in plaintext, anyone who obtains the file can use the logins right away without cracking anything.

Why This Is Dangerous

Stealer logs are collected by infostealer malware running quietly on an infected device, which copies saved browser logins and sends them back to whoever controls the malware. Because each record pairs an email address with a plaintext password and the exact site it was used on, an attacker can log in directly without guessing, and if the password shows up on other sites, they can try it there as well.

What Was Exposed

• Email addresses
• Plaintext passwords
• URLs of the sites the credentials were used on

Why This Matters

A record count in the thousands rather than millions does not make a leak safe. Every plaintext credential pair in this file is a ready-made login that can be tried against banking sites, email providers, and other accounts in a credential stuffing attack. Anyone who reused this password elsewhere faces a real risk of account takeover, and once one account falls, it can open the door to identity theft or financial fraud.

Inside the Stealer Log: How the Data Was Harvested

Stealer logs are produced by infostealer malware, a type of program built to quietly pull saved credentials, autofill data, and browsing history out of an infected device's web browser. Once the malware operator collects this information, it is typically bundled into a log file and shared or sold through Telegram channels and dark web marketplaces, which is exactly how this chass.utoronto.ca data surfaced. Because the credentials are lifted directly from the victim's machine, they are often still valid at the time the log is found.

Check If You Are Affected

If you have ever logged into chass.utoronto.ca or a similar site, it is worth checking whether your details appear in this or another leak. HEROIC's free breach scanner searches a database of more than 400 billion leaked records, including stealer logs like this one, so you can quickly find out whether your email address or passwords have been exposed and act before an attacker does.