60 PCS – 11.20.23 – OCTOPUSCLOUDLOGS uploaded by a Telegram User

We noticed an unusual spike in inbound traffic originating from a known malicious IP range, correlating with a sudden increase in failed login attempts across several internal applications. What struck us was the sheer volume of these failed attempts, suggesting a brute-force or credential stuffing campaign rather than a targeted exploit. Further investigation revealed that the source of these credentials appeared to be a recently surfaced stealer log file, making this a clear case of compromised user credentials fueling further attack vectors.

The incident, discovered on November 20, 2023, involves a stealer log file uploaded by a Telegram user, identified as "OCTOPUSCLOUDLOGS." This log contained 5,625 records, primarily comprising email addresses and associated plaintext passwords. The data also included URLs, likely indicating the compromised websites or services accessed by the affected users. The source structure of the leak suggests a widespread infection of endpoints by infostealer malware, which then exfiltrated these credentials. The primary leak location appears to be the Telegram platform, where the data was publicly shared, posing an immediate risk of further exploitation by other malicious actors.

While specific news coverage directly linking this particular Telegram upload to broader public reporting is limited, the nature of stealer logs is a well-documented threat in the cybersecurity landscape. Research from firms like Mandiant and CrowdStrike consistently highlights the prevalence of infostealer malware as a primary vector for initial access and credential harvesting. The tactics observed here align with typical post-breach activity where compromised credentials from such logs are then weaponized for credential stuffing attacks against other services, a phenomenon frequently discussed in OSINT communities and cybersecurity forums.