Monster Cloud Free 4 Data Breach: 10,725 US Credentials Exposed

Monster Cloud Free 4: A Previously Missing Batch Now Confirmed

Monster Cloud Free 4 completes what was once a visible gap in the series. When Monster Cloud's free batches first emerged in the dataset, Free 4 appeared absent -- present were Free 1, 2, 3, 5, 6, 7, 9, and 10, but Free 4 was missing. Its arrival confirms that Monster Cloud released eight batches on October 8, 2023 alone: Free 1 (2,525), Free 2 (7,597), Free 3 (12,360), Free 4 (10,725), Free 5 (18,945), Free 6 (10,651), Free 7 (10,078), and Free 9 (13,317) -- combining for 86,198 US plaintext credentials in a single day. Only Free 8 remains unaccounted for in the public dataset.

Monster Cloud Free 4 (October 2023): Stealer Log Summary

• Records Exposed: 10,725
• 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 8, 2023

The Near-Sequential Catalog and the Single Remaining Gap

Monster Cloud's October 2023 free releases now run nearly sequentially: Free 1, 2, 3, 4, 5, 6, 7, 9, 10 -- with only Free 8 absent. A single gap in an otherwise sequential series across nine identified batches strongly suggests Free 8 exists but wasn't released publicly during the October cluster. The non-public-release status of Free 8 could mean it was reserved for paid subscribers, sold privately, or simply hadn't yet been processed at the time of October 8's mass distribution. Whatever the explanation, Free 4's confirmation means Monster Cloud's October 8 campaign was even more organized and comprehensive than previously understood.

Free 4's Position: Mid-Tier by Volume

Monster Cloud Free 4's 10,725 records places it fifth of eight in the October 8 lineup. The distribution ranges from Free 1's 2,525 to Free 5's 18,945, with Free 4 sitting in the tight mid-tier cluster alongside Free 6 (10,651) and Free 7 (10,078). All three are within 647 records of each other, suggesting these batches drew from similarly sized log subcollections processed sequentially over the same collection period. Free 4 isn't the largest or smallest -- it's the representative middle of a highly stratified credential release operation.

October 8's Massive Footprint: 86,198 Monster Cloud Records

With Free 4 confirmed, the October 8 Monster Cloud total reaches 86,198 records -- from a single channel, on a single day. Combined with logsinspector's 80,957 records, GODELESS CLOUD's 14,243, MOONLOGSFREE's 11,740, LulzsecCloudLogs' 5,339, and the assorted other Oct 8 channels, October 8, 2023 emerges as one of the highest-volume single days in the October cluster -- likely exceeding 200,000 US credentials distributed on the event's opening day alone before the October 9 peak even arrived.

Check If Your Data Was Exposed

HEROIC's free breach scanner searches across more than 400 billion exposed records -- including Monster Cloud Free 4 and all nine other Monster Cloud batches from October 2023. With nearly 98,000 combined Monster Cloud credentials in circulation since October 2023, the likelihood that your data appears somewhere in this series is meaningful. Scan your exposure at HEROIC's breach scanner and secure any compromised accounts before credential stuffing attacks reach them.