OCTOBRO 1488pcs: 15,226 Stolen US Credentials from October 2, 2023

OCTOBRO 1488pcs: The Second Confirmed Batch from a Major October 2 Operator

OCTOBRO's October 2, 2023, release was not a single event -- it was a two-batch distribution. Alongside the larger 5,478pcs batch (69,276 records), OCTOBRO also released this 1,488pcs batch containing 15,226 US credentials. The two releases combine for 84,502 records across 6,966 source files, placing OCTOBRO among the highest-volume single-day operators confirmed on October 2. Both batches carry the same embedded date -- "10.09.2023" -- in their names, suggesting they were drawn from the same underlying colection campaign, with the data split and released through different channel tiers or distributed to different buyer segments.

1488 PCS - 10.09.2023- OCTOBRO (October 2023): Stealer Log Summary

• Records Exposed: 15,226
• 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: USA
• Date Leaked: October 2, 2023

Yield Comparison Between OCTOBRO's Two Batches

The 1,488pcs batch yields ~10.2 records per source file, compared to ~12.6 records per file in the larger 5,478pcs batch. This yield gap between the two same-day releases may reflect different source pools: the 5,478pcs batch drawing from better-yielding endpoints (more saved credentials per device), while the 1,488pcs batch was sourced seperately from a different set of infected machines. Alternatively, the smaller batch may be a curated subset witheld from the main release for a specific buyer tier. Either way, the combined 6,966 source files represents an enormous infection footprint for a single operator on a single day.

The "10.09.2023" Date Mystery Across Both Batches

Both confirmed OCTOBRO batches embed "10.09.2023" in their names -- "5478 PCS - 10.09.2023- OCTOBRO" and "1488 PCS - 10.09.2023- OCTOBRO." This shared embedded date, regardless of whether it represents September 10 or October 9 in different date conventions, confirms it refers to the collection date rather than the distribution date (both were distributed October 2). A single collection-date stamp applied across two distinct batches supports the interpretation that OCTOBRO accumulated logs over an extended campaign period and then released multiple batches from the same harvest window on October 2 -- a common strategy among high-volume operators managing large log inventories.

Check If Your Data Was Exposed

HEROIC's free breach scanner searches across more than 400 billion exposed records, including both confirmed OCTOBRO batches from October 2, 2023. Whether your credentials were included in the 69,276-record large batch or this 15,226-record release, HEROIC can identify the exposure. Run a free scan at HEROIC's breach scanner to check your exposure across this and the broader Oct 2 dataset.