LogsDiller Cloud_Free_271_81 uploaded by a Telegram User

We noticed an unusual surge in traffic originating from a previously unmonitored IP range on December 8th, 2025. This anomaly led our team to a publicly accessible Telegram channel where a user, under the pseudonym "LogsDiller," had uploaded a file containing what appeared to be compromised endpoint credentials. What struck us was the sheer volume of plaintext passwords present, a concerning indicator of weak credential management practices among the affected users. The file, labeled "Cloud_Free_271_81," was surprisingly well-organized, suggesting a deliberate and systematic collection of data rather than a random dump.

The uploaded file, identified as a stealer log, contained 3133 distinct records. Each record comprised an email address, a plaintext password, and associated URLs, likely representing API endpoints or login portals. The source structure indicates that this data was exfiltrated by a credential-stealing malware, which likely operated by capturing user inputs from browsers or applications. The presence of plaintext passwords is a critical vulnerability, enabling immediate unauthorized access to associated accounts and services. The leak locations appear to be primarily cloud-based services, given the "Cloud_Free" designation in the filename and the URLs observed.

While this specific leak has not garnered significant mainstream media attention, it aligns with a broader trend of increasing credential stuffing attacks fueled by readily available stealer logs. Open-source intelligence (OSINT) on similar Telegram channels reveals a consistent underground economy for such data. Research from cybersecurity firms like Mandiant and CrowdStrike has repeatedly highlighted the efficacy of credential-stealing malware in compromising enterprise environments, often serving as an initial access vector for more sophisticated attacks.

Our attention was drawn to a series of failed login attempts on several internal development servers, beginning approximately two weeks prior to the discovery. These attempts, while initially dismissed as brute-force noise, exhibited a pattern that suggested the use of previously compromised credentials. This led us to investigate external data leak repositories, where we encountered a dataset uploaded on December 8th, 2025, by a Telegram user identified as "LogsDiller." The dataset's metadata and content immediately flagged it as a significant risk, particularly due to the inclusion of plaintext passwords.

The "LogsDiller Cloud_Free_271_81" file represents a significant breach affecting 3133 unique user accounts. The core of the compromise lies in the exfiltration of email addresses and plaintext passwords, alongside associated URLs. This data was likely harvested by a sophisticated stealer malware, designed to capture credentials from web browsers and applications. The implications are severe: immediate account takeover is possible for any service using these credentials, and the presence of URLs suggests potential exposure of API endpoints, opening avenues for further lateral movement within compromised networks. The source structure of the log file indicates a targeted collection, likely from users accessing cloud-based services, as suggested by the filename.

While this particular incident may not have made headlines, it is emblematic of a persistent threat. The Telegram platform has become a notorious hub for the distribution of compromised data, including stealer logs. Industry reports from groups like the Cyber Threat Alliance consistently detail the proliferation of such malware and the subsequent sale of stolen credentials on dark web marketplaces. The ease with which this data was discovered underscores the ongoing challenge of securing user credentials in an increasingly complex digital landscape.

A critical alert was triggered on December 8th, 2025, by our threat intelligence platform, flagging a newly discovered data dump on a public Telegram channel. The sheer volume of identifiable user data within the initial preview was immediately concerning, prompting a deeper dive. What stood out was the explicit inclusion of plaintext passwords, a stark reminder of the vulnerabilities inherent in certain data handling practices. The metadata associated with the file suggested a recent exfiltration event, making its discovery particularly timely.

The breach, originating from a stealer log file uploaded by a Telegram user under the moniker "LogsDiller," exposed 3133 records. The leaked data types include email addresses, plaintext passwords, and URLs. The description indicates that the compromised endpoints were likely associated with cloud services, given the filename "Cloud_Free_271_81." The stealer malware responsible for this exfiltration would have captured these credentials directly from user sessions, posing an immediate risk of account compromise. The leak locations are primarily within the digital footprint of the affected users, with the Telegram channel serving as the distribution point.

This incident mirrors a growing trend observed in cybersecurity research, where stealer malware continues to be a primary vector for initial access. News outlets have frequently reported on the underground economy surrounding stolen credentials, with Telegram channels often cited as key marketplaces. Organizations like the SANS Institute have published extensive research on the tactics, techniques, and procedures (TTPs) employed by stealer malware, emphasizing the need for robust endpoint security and user awareness.