LogsDiller Cloud_Free_474_104 uploaded by a Telegram User

We noticed an unusual surge in credential stuffing attempts originating from a specific IP block, prompting an immediate investigation into our authentication logs. What struck us was the sheer volume and the consistent pattern of failed logins, suggesting a coordinated effort rather than opportunistic brute-forcing. This anomaly led us to a compromised endpoint and subsequently to the discovery of a stealer log file that had been exfiltrated and subsequently uploaded to a public Telegram channel. The implications of this data leak are significant, as it appears to contain a snapshot of user credentials and associated endpoint information.

The breach was identified on 08-Dec-2025 when our Security Information and Event Management (SIEM) system flagged a high volume of failed login events. Further analysis traced these attempts back to a single compromised endpoint, which was found to have a recently active stealer malware. The exfiltrated data, uploaded by a Telegram user under the name "LogsDiller Cloud_Free_474_104," contained 6,534 records. These records comprise sensitive information including email addresses and, critically, plaintext passwords, alongside associated URLs pointing to API hosts. The threat theme here is clearly credential harvesting and subsequent potential lateral movement, as attackers gain access to multiple services through reused or weak passwords found within the stealer log.

While no direct news coverage has emerged specifically detailing this particular Telegram upload, the broader landscape of stealer malware continues to be a persistent concern. Researchers at Mandiant and CrowdStrike have consistently reported on the proliferation of infostealers like RedLine, Vidar, and Raccoon, which are often distributed via malvertising or phishing campaigns and subsequently sold or leaked on underground forums and messaging platforms. The ease with which these logs are shared, as evidenced by this Telegram incident, amplifies the risk of widespread credential compromise and account takeover across various online services.