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Manually De-obfuscating Malicious Content

ID: 7124102d-f04c-581b-be3d-7a31a7e49687

STIX ID: report--7124102d-f04c-581b-be3d-7a31a7e49687

Feed Name: Zscaler Security Research Blog

Threat Score
50/100

Date Published: 2025-04-02

Date Updated: 2026-05-01

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This report explains a manual deobfuscation of malicious JavaScript injected into an Indian university website. The analyst isolates and reuses the obfuscation function (D()) in a test HTML page to reveal decoded strings and identifies a malicious URL hosted on a suspicious domain, illustrating a web-based malvertising/drive-by compromise and describing the steps to extract indicators.

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