Researchers Document 61,020-Record baset_cloud 861-File Telegram Archive

Researchers Document the baset_cloud 861count Archive

On June 20, 2025, a Telegram user uploaded baset_cloud 861count, a large stealer log archive aggregated from 861 distinct log files. Researchers who captured the dump documented 61,020 plaintext credential records inside, each pulled from a unique infected endpoint. The aggregate size and 861-file naming convention make this one of the larger single drops from the baset_cloud operator.

The archive contains email addresses, login URLs, plaintext passwords, and API host metadata, providing attackers with everything needed for immediate credential abuse.

Key Evidence From the Archive

• Record count: 61,020 total credential entries
• File count: 861 discrete stealer log files bundled together
• Distribution: single Telegram drop, public channel
• Credential types: email addresses, plaintext passwords, URLs, API hosts
• Leak date: June 20, 2025

What the 861-File Structure Tells Researchers

The 861count label refers to the number of individual stealer log subdirectories bundled into the archive. Each subdirectory typically corresponds to one victim device and contains browser credentials, cookies, autofill data, and sometimes screenshots. When researchers reverse-engineer these dumps, the per-file structure confirms the logs came from a widely deployed infostealer operator rather than one-off infections.

Volume at this scale also suggests aggregation from affiliate-driven distribution, where multiple actors feed a central broker.

Documented Data Types Inside baset_cloud 861count

• Email addresses: the primary pivot point for credential stuffing
• Plaintext passwords: no hashing, no salting, immediate usability
• URLs: mapping each credential to a specific site
• API host data: useful for targeting cloud and SaaS backends

Observed Risk Patterns

Researchers tracking baset_cloud drops note a clear pattern: records from older drops reappear in newer aggregated lists, meaning victims who did not rotate credentials in June 2025 remain exposed long after the original leak. Credential stuffing infrastructure specifically targets these high-volume archives because the success rate justifies the compute cost.

• High file counts suggest operator maturity and affiliate channels
• Fresh 2025 dumps have minimum 18-24 month active attack windows
• Corporate victims appear mixed in with personal accounts

Evidence-Based Response Actions

• Assume credentials from June 2025 and earlier remain unrotated and exposed
• Rotate passwords and enforce MFA on email, banking, and SSO accounts
• Audit cloud IAM keys and API tokens, especially if they appeared pre-2025
• Run endpoint scans to remove any active infostealer still exfiltrating data
• Subscribe to a compromise monitoring service that ingests new drops in near real time

Verify Against 400B+ Compromised Records

HEROIC maintains a research-grade archive of more than 400 billion compromised records, including documented Telegram drops like baset_cloud 861count. Search your email and see exactly which records researchers have captured tied to your identity.

Search the HEROIC 400B+ record database to confirm whether you appear in baset_cloud 861count or related stealer archives.