Executive Summary

Anthropic warned that infostealers are stealing Claude session cookies, allowing attackers to hijack user accounts and consume Claude usage at the users’ expense. The malware targets session tokens to bypass authentication and monetize the service.

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Intelligence Metadata - Source Publisher: Malwarebytes Labs - Published Date: 2026-09-01T10:08:28+00:00 - Category: malware

Original Description: Anthropic has warned that infostealers are stealing Claude session cookies to access users’ accounts and consume usage at their expense.

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