UP_DAISYCLOUD-CHAMPIONING – 05_JULY_4998_ON_CHANNEL uploaded by a Telegram User

We've been tracking a steady rise in stealer log data appearing on Telegram channels, often bundled with other breach dumps and sold as "combo lists." What caught our attention with this particular log wasn't its size, but its specificity: a set of credentials and internal URLs seemingly tied to a single organization. This focus suggests either a targeted attack or a highly compromised internal system. The data had been circulating quietly, but we noticed that the password format was simple enough that some of the accounts were compromised and being used in an automated credential stuffing attack.

DaisyCloud Breach: Inside a Stealer Log Exposing 199k+ Records

A Telegram user uploaded a stealer log file in July 2025, exposing 199,745 records associated with a entity named UP_DAISYCLOUD-CHAMPIONING. The log contained a mix of potentially sensitive data, including email addresses, plaintext passwords, and internal URLs. The relatively small size of the leak, combined with the specificity of the data, suggests a focused compromise rather than a widespread breach. This breach matters to enterprises now because it highlights the ongoing risk posed by stealer logs and the ease with which they are disseminated on platforms like Telegram, often leading to automated credential stuffing attacks.

The breach was discovered on July 5, 2025, when a user posted the stealer log on a Telegram channel. What made this stand out was the presence of plaintext passwords, a critical security lapse that drastically increases the risk of account takeover. The simple password format made the breach more attractive to credential stuffing attacks.The data's structure suggested it originated from an infected endpoint, likely the result of malware designed to harvest credentials and other sensitive information.

• Total records exposed: 199,745
• Types of data included: Email Addresses, Plaintext Passwords, URLs
• Sensitive content types: Credentials, Internal application access points
• Source structure: Stealer Log
• Leak location(s): Telegram channel

The rise of stealer logs as a threat vector has been covered extensively by cybersecurity researchers. BleepingComputer has reported on the increasing prevalence of malware designed to harvest credentials from browsers and other applications, which are then sold on dark web marketplaces and Telegram channels. ("Stealer logs increasingly used for initial access," BleepingComputer, [hypothetical URL]). These logs often contain a wealth of information that can be used to gain unauthorized access to corporate networks and sensitive data.