2025 AlienStealerLogs — stealer-log compilation (~300M rows; indexed Jun 2026)
Data compromised
Stolen credentials (emails/passwords from infected devices)
Technical writeup
Stealer-log compilation indexed by breach trackers in June 2026 (XposedOrNot H1 2026 report): “AlienStealerLogs” aggregates credential-stealer output with on the order of ~299.6M record rows (emails and passwords). This is not a single company breach—it is malware-derived credential material circulating in criminal markets. BreachHistory catalogs it labeled unverified compilation with the tracker row count; victims should rotate passwords and enable MFA rather than expect a corporate notice.
Root cause
Infostealer malware log compilation (not a corporate hack)