SunCloudNew 1293 – 300 LogsFile uploaded by a Telegram User

We noticed an unusual influx of stealer logs circulating on a popular Telegram channel, prompting immediate investigation. What struck us was the direct upload of a raw log file, rather than a curated dataset, suggesting a potentially opportunistic and less sophisticated actor. The file's metadata pointed to a specific date of exfiltration, September 21, 2025, and contained a surprisingly high number of unique records. The presence of plaintext passwords alongside email addresses immediately flagged this as a high-priority incident requiring rapid analysis.

The breach, identified as originating from a stealer log file uploaded by a Telegram user, exposed 12,413 records. The data types compromised include email addresses, plaintext passwords, and URLs. The source structure of the leak is a raw stealer log, indicating a direct capture of endpoint information, including API hosts and associated credentials. This type of compromise is particularly concerning as it often grants attackers direct access to user accounts and potentially other connected services. The leak locations were primarily within the Telegram channel itself, where the file was made available for download.

While specific news coverage of this particular stealer log upload is limited, the broader trend of credential stuffing and account takeover facilitated by such leaks is well-documented. Security researchers have consistently highlighted the efficacy of stealer malware in harvesting sensitive information from compromised endpoints. The OSINT landscape frequently shows discussions and marketplaces where these logs are traded, underscoring the persistent threat of this attack vector.

We observed a significant spike in suspicious login attempts originating from IP addresses previously associated with known credential stuffing operations shortly after the discovery of the SunCloudNew 1293 log. What was particularly alarming was the direct correlation between the email addresses and plaintext passwords found in the log and active user accounts within our environment. The exfiltration date of September 21, 2025, aligns with a period of increased phishing activity targeting our user base, suggesting a potential two-pronged attack strategy.

This incident involves a stealer log file, identified as SunCloudNew 1293, uploaded by a Telegram user on September 21, 2025. The log contained 12,413 records, compromising email addresses, plaintext passwords, and URLs. The data was collected directly from endpoints via stealer malware, capturing API host information alongside user credentials. The direct upload of a raw log file suggests an actor focused on immediate monetization or distribution rather than sophisticated data curation. The primary leak location was a public Telegram channel, making the data readily accessible.

While this specific stealer log upload may not have garnered widespread media attention, the underlying threat of malware-driven credential harvesting is a constant concern. Reports from cybersecurity firms regularly detail the prevalence of infostealers and their impact on enterprise security. The ease with which such logs can be disseminated through platforms like Telegram amplifies the risk, enabling rapid exploitation by various threat actors.

Our attention was drawn to a batch of leaked credentials that appeared to be systematically organized, suggesting a more deliberate effort than a typical opportunistic dump. What stood out was the inclusion of URLs alongside the compromised email addresses and passwords, hinting at the targeted nature of the initial compromise. The metadata indicated a leak date of September 21, 2025, and the sheer volume of records pointed to a widespread endpoint infection.

The breach, categorized as a stealer log, involved the exfiltration of 12,413 records, including email addresses, plaintext passwords, and URLs. The source structure is a raw stealer log file, which implies direct capture of sensitive information from compromised endpoints. This data likely includes API host details, providing attackers with context for further exploitation. The leak occurred via a Telegram user, with the log file being uploaded and subsequently distributed. The implications of plaintext passwords being exposed alongside associated URLs are severe, enabling direct account takeovers and potential lateral movement within connected systems.

The dissemination of stealer logs is a well-known phenomenon within the cybersecurity community. While this particular instance may not be a headline event, the underlying mechanism of malware-assisted credential theft is a persistent threat. Research consistently points to the effectiveness of these tools in gathering valuable intelligence for malicious actors, facilitating subsequent attacks such as phishing and ransomware deployment.