BananaLogs 440count Data Breach: 4,969 US Credentials From Oct 2023 Stealer Log

BananaLogs on Oct 5: The Prelude to a Larger Release

BananaLogs 440count arrived on October 5, 2023 -- the day before a massive single-day credential cluster that would eventually account for more than 853,000 exposed US records. At 4,969 records, this batch is the smaller of two BananaLogs releases in the dataset. A second batch, BananaLogs 495count with 9,155 records, followed on Oct 6. Together they bring the operator's combined footprint to 14,124 -- a substantail presence across a two-day window when dozens of infostealer operators flooded Telegram with US credential sets.

BananaLogs 440count (October 2023): Stealer Log Summary

• Records Exposed: 4,969
• 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 5, 2023

What "440count" Tells Analysts About This Batch

The "440count" suffix encodes the number of source log files the operator compiled into this release: 440 individual endpoint captures. Across those 440 files, 4,969 records were extracted, producing a per-file yield of roughly 11.3 records. This yield is consistent with broadly deployed infostealer campaigns where malware infects a large number of machines but extracts a relatively modest credential set from each -- the opposite of high-yield targeted attacks. The Oct 6 batch (495count) shows slightly more files but dramatically higher record count (9,155), suggesting the second release drew from machines with richer credential stores or broader browser autofill data.

Plaintext Passwords and the Credential Stuffing Pipeline

BananaLogs 440count contains plaintext passwords -- credentials captuerd at the moment of entry or from browser session data by infostealer malware, requiring no cracking or decryption before use. Threat actors acquire these batches on Telegram, load them into automated credential stuffing tools, and test them at scale against login endpoints across banking, email, streaming, and e-commerce platforms. Successful logins are then monetized directly or sold as validated account access to other actors in the criminal ecosystem.

October 5, 2023: A Pre-Surge Window Now Confirmed Across 13+ Operators

Research into this dataset has confirmed at least 13 distinct operators releasing credential batches on October 5, 2023 -- the day before the Oct 6 peak. BananaLogs 440count is one data point in a broader pattern of pre-surge activity that now appears to represent either coordinated release timing or a natural accumulation pattern in the Telegram infostealer market. The Oct 5 operators collectively exposed tens of thousands of US credentials in the 24 hours before the single-day record was set.

Check If Your Data Was Exposed

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