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HTML Attachment Phishing and Telegram Bots Target European Organizations

HTML Attachment Phishing and Telegram Bots Target European Organizations

First seen 2 Dec 2025, 18:33 UTC • •

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ThreatCluster AI
ThreatCluster •March 12, 2026 at 13:27 UTC

A sophisticated phishing campaign has been identified in Central and Eastern Europe, targeting various sectors including manufacturing, government, and telecommunications. The campaign utilizes HTML attachments containing malicious JavaScript to steal credentials, employing Telegram bots to facilitate the attack and bypass traditional email security measures. Organizations in Germany, Hungary, Slovakia, and the Czech Republic have been specifically affected.

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