Monster Cloud Free 52 Stealer Log | 27,938 US Records Exposed

Monster Cloud Free 52: The Largest Confirmed Batch at 27,938 Records

Monster Cloud Free 52 stands as the largest confirmed Monster Cloud batch from any date -- 27,938 plaintext US credentials released on October 7, 2023. Within a single day that saw 21 Monster Cloud batches totaling 358,254 records, Free 52 leads all other releases by a substantial margin, surpasing the previous record-holder Free 48 (24,516) by more than 3,400 records. The batch exemplifies the upper bound of Monster Cloud's Oct 7 operation and reveals the scale at which Telegram-based stealer log operations can function.

Monster Cloud Free 52 (October 2023): Stealer Log Summary

• Records Exposed: 27,938
• Data Types: Email addresses, plaintext passwords, URLs
• Breach Type: Stealer log -- credentials harvested from malware-infected endpoints, not a direct database breach
• Password Type: Plaintext -- captured directly from browser sessions and credential stores by infostealer malware
• Country: United States
• Date Leaked: October 7, 2023

Record Volume: Free 52 in the Oct 7 Size Hierarchy

Monster Cloud Free 52's 27,938 records establish it as the confirmed volume leader across all Monster Cloud batches analyzed. The super-large tier on October 7 -- Free 36 (23,030), Free 48 (24,516), and Free 52 (27,938) -- forms a distinct upper band above the large-tier group. Free 52 exceeds the Oct 7 day's own average batch size of approximately 17,060 records by more than 63%. This volume gap from the large-tier batches (~19,000-22,000) to Free 52's 27,938 is not a gradual step but a clear jump, suggesting Free 52 may have drawn from a larger or more densely populated endpoint pool than its contemporaries.

Batch Number vs. Record Count: No Correlation in Monster Cloud

Free 52's position as the largest batch despite having a higher batch number than many smaller releases demonstrates a core characteristic of Monster Cloud's numbering system: batch numbers are administratively assigned and carry no relationship to record volume. The clearest illustration from the Oct 7 series is the 46→47→48 sequence -- Free 46 contains 19,424 records, Free 47 drops to 11,192, and Free 48 jumps to 24,516. Free 52's 27,938-record count continues this pattern of radical size discontinuity between consecutive batch numbers, confirming that analysts cannot use Monster Cloud batch numbers as proxies for data volume or harvest quality.

Plaintext Credential Risk at Scale

At 27,938 records, Free 52 represents a material threat to affected users. Each record contains an email address, a URL indicating where the credential was in use, and a plaintext password -- no decryption required, no hash cracking necessary. Infostaler malware captures these credentails by intercepting browser sessions and credential stores before any encryption layer is applied, meaning what attackers receive is a directly deployable attack list. Credential stuffing campaigns targeting US email and financial platforms can begin processing batches of this size within minutes of acquisition.

Check If Your Data Was Exposed

HEROIC's free breach scanner covers more than 400 billion exposed records, including Monster Cloud Free 52 and the full Oct 7 cluster totaling 358,254 records. If your credentials were captured by infostealer malware and appear in any Monster Cloud batch, early detection is your best defense. Search your email now at HEROIC's breach scanner and see exactly which breaches have exposed your data.