450 Berserklogs Stealer Logs – December 2022 Breach Exposed 6,558 Records

We noticed the recent emergence of a stealer log file, uploaded to Telegram on December 4th, 2022, containing a concerning volume of sensitive endpoint and credential data. What struck us immediately was the direct nature of the compromise: this wasn't a traditional database breach, but rather a collection of information harvested by malware. The log file, identified as "berserklogs - 450 LOGS DECEMBER," contained 6,558 distinct records, each representing a potential point of compromise. The inclusion of plaintext passwords alongside email addresses and API host URLs presents a significant risk of cascading credential stuffing attacks and unauthorized access to connected services.

The discovery originated from a routine scan of publicly accessible dark web forums and Telegram channels, where the stealer log was shared by an anonymous user. This particular log appears to be a compilation from a malware strain designed to exfiltrate browser credentials, cookies, and other sensitive information from infected endpoints. The 6,558 records exposed include email addresses, which are often reused across multiple platforms, and critically, plaintext passwords, bypassing any hashing or salting mechanisms. The presence of URLs, likely representing visited websites or API endpoints, further contextualizes the compromised sessions and potential targets. The source structure of the data suggests it was aggregated from individual endpoint infections, rather than a centralized database exfiltration. The leak locations are primarily within private Telegram channels, making discovery reliant on active monitoring and specialized scraping tools.

While this specific incident hasn't garnered widespread media attention, the methodology employed is a persistent threat. Stealer malware continues to be a primary vector for credential harvesting, with numerous reports detailing its impact on individuals and organizations. Research from cybersecurity firms frequently highlights the prevalence of such malware families and their evolving capabilities in evading detection. The implications of this leak are amplified by the potential for threat actors to cross-reference these stolen credentials with other breached datasets, increasing the likelihood of successful account takeovers across various online services.