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Warden Infostealer Targets AI Agent Credentials and Developer Keys

·2026.10.07 23:18

Key point

The Warden Infostealer bypasses web logins by stealing raw primaryApiKey values and OAuth data from compromised .claude.json files.

Details

The Warden Infostealer is actively targeting AI agent credentials and developer keys, specifically focusing on configuration files like .claude.json. Log extractions confirm the malware successfully exfiltrates raw primaryApiKey values and detailed OAuth account data linked to Anthropic/Claude accounts.

By capturing these CLI tokens, attackers bypass traditional web login mechanisms entirely. This grants them direct, programmatic access to premium AI models, organizational workspaces, and potentially sensitive source code that passes through these development tools.

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