284M accounts from ALIEN TXTBASE Stealer Logs were exposed in this breach. Besides email addresses, it included passwords, which makes it a high-risk breach.
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Email addressesPasswords
In February 2025, 23 billion rows of stealer logs were obtained from a Telegram channel known as ALIEN TXTBASE. The data contained 284M unique email addresses alongside the websites they were entered into and the passwords used. This data is now searchable in HIBP by both email domain and the domain of the target website.
Source: Have I Been Pwned (CC BY 4.0)