Upload by LOGSYNC – KeyCloud_Free_logs136 uploaded by a Telegram User

We've been tracking a notable uptick in stealer log activity on Telegram channels recently, but what caught our eye about this particular dump wasn't its size, but its specificity. While many stealer logs contain a chaotic mix of data from various sources, this one, uploaded on June 13, 2025, appeared to be heavily focused on data related to LOGSYNC's "Upload by LOGSYNC – KeyCloud_Free_logs136" application. The data had been circulating relatively quietly, but the potential for targeted exploitation given the specific application focus warranted closer inspection.

The KeyCloud Log Steal: 17,065 Records Exposed

A Telegram user uploaded a stealer log file containing 17,065 records pertaining to endpoints, emails, API hosts, and passwords associated with LOGSYNC's KeyCloud_Free_logs136 application. The breach, discovered by our team during routine monitoring of Telegram channels known for hosting stolen data, stood out because of its apparent focus on a single application. Instead of a broad collection of credentials from diverse sources, this log appeared to be the result of a targeted or highly specific compromise, potentially indicating a threat actor specifically interested in LOGSYNC or its user base. This matters to enterprises because it highlights the risk of seemingly "free" or "lite" versions of applications, which may have weaker security postures and become targets for attackers looking to compromise larger user bases. The incident also underscores the growing trend of stealer logs being weaponized for highly targeted attacks, moving beyond opportunistic credential stuffing.

Breach Stats:
* Total records exposed: 17,065
* Types of data included: Email Addresses, Plaintext Passwords, URLs, API Hosts, Endpoints
* Source structure: Stealer log
* Leak location: Telegram channel

External Context & Supporting Evidence

Stealer logs remain a persistent threat vector, with numerous reports highlighting their prevalence on platforms like Telegram. In February 2024, BleepingComputer reported on the massive distribution of stealer logs containing millions of credentials across various Telegram channels (BleepingComputer: "Millions of credentials found in Telegram stealer logs"). While this specific LOGSYNC incident hasn't yet garnered mainstream media attention, the broader trend of stealer log distribution is well-documented. One Telegram post we observed claimed that these specific logs were "collected from devs testing an AI project," though the veracity of this claim remains unconfirmed.