Monster Cloud Free 13: 18,366 US Records — Key Bridge in the Free 12-19 Octet

Monster Cloud Free 13: The Key That Unlocks the Free 12-19 Octet

Monster Cloud Free 13 occupies a critical structural position in the Oct 6 sequence: it is the bridge between Free 12 (10,475) and Free 14 (19,536). Before Free 13's date was confirmed as October 6, 2023, both Free 12 and Free 14 appeared to be isolated or loosely grouped. Free 13's confirmation as Oct 6 closes the gap and reveals a continuous 8-batch run from Free 12 through Free 19 -- one of the most signifigant structural discoveries in the MC Oct 6 batch analysis. At 18,366 records, Free 13 is also the second-largest batch in the octet, behind only Free 16's super-large 21,307.

Monster Cloud Free 13 (Oct 6, 2023): Stealer Log Summary

• Records Exposed: 18,366
• 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 6, 2023

Near-Super-Large: Free 13 in the Context of MC's Oct 6 Peaks

At 18,366 records, Free 13 falls just below the 20,000-record threshold that defines MC's "super-large" Oct 6 batches (Free 8, 16, 23, 33, 34). It is, however, the second-largest batch in the Free 12-19 octet and the sixth-largest of all 29 confirmed MC Oct 6 batches. Only Free 34 (25,582), Free 23 (23,252), Free 33 (22,858), Free 8 (21,345), and Free 16 (21,307) exceed it. Free 13's volume, combined with that of Free 14 (19,536) directly adjacant to it, creates a two-batch midpoint of 37,902 records -- a notable concentration at the center of the octet.

The Ongoing Expansion of MC's Oct 6 Total

Each newly confirmed MC batch pushes the Oct 6 total further from the original 286,334 estimate. With 29 batches now confirmed at 404,809 records, combined with 381,921 non-MC records, the Oct 6 grand total now excedes 786,000 exposed US credentials. The scale of this single-day event -- across Monster Cloud, Fortuna, Pubx, Klaus, Usmancloud, and a dozen other operators -- has no parallel in HEROIC's dataset.

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