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Email Threats: HTML Smuggling on the Dark Web

ID: 62fbc313-961a-5aad-9561-8edbb8bde9a6

STIX ID: report--62fbc313-961a-5aad-9561-8edbb8bde9a6

Feed Name: ReliaQuest Blog

Threat Score
55/100

Date Published: 2023-03-15

Date Updated: 2026-04-29

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ReliaQuest's Photon Research team examines the persistent use and evolution of HTML smuggling for phishing, citing cybercriminal forum discussions, QakBot OneNote delivery examples, and emerging alternatives such as PDF landing pages and HTA/ISO packing; the report urges defenders to update detections and highlights ReliaQuest's GreyMatter Phishing Analyzer as a mitigation tool.

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