LogsDiller Cloud_421_206 uploaded by a Telegram User

We noticed an unusual surge in outbound traffic originating from a previously dormant internal endpoint on December 9th, 2025. This anomaly, coupled with subsequent alerts from our endpoint detection and response (EDR) system flagging suspicious process activity, immediately triggered a deeper investigation. What struck us as particularly concerning was the nature of the data being exfiltrated: a seemingly random assortment of credentials and URLs, rather than a targeted data dump. The discovery of this stealer log file on a public Telegram channel, containing a significant number of our users' sensitive information, solidified the severity of the incident.

The incident originated from a compromised endpoint, identified as LogsDiller Cloud_421_206, which was subsequently found to have uploaded a stealer log file to a Telegram user. This log file contained 5,201 records, primarily consisting of email addresses and associated plaintext passwords. Additionally, a number of URLs were also exposed, potentially indicating compromised browsing sessions or saved credentials for web services. The source structure of the leaked data points to a common credential-stealing malware, which likely captured this information directly from the affected endpoint's memory or local storage. The leak location, a public Telegram channel, amplifies the risk of widespread credential stuffing attacks against our user base.

While this specific incident has not yet garnered widespread media attention, the proliferation of stealer malware on platforms like Telegram is a well-documented and growing concern within the cybersecurity community. Research from various threat intelligence firms consistently highlights the ease with which attackers can leverage these platforms to distribute malicious tools and monetize stolen data. The exposure of plaintext passwords, as seen in this breach, directly facilitates credential stuffing attacks, a common tactic used to gain unauthorized access to other online accounts. The presence of URLs further suggests a potential for attackers to identify high-value targets or pivot to other compromised services.