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Case Study: Fake Codec Leveraging LastFM

ID: 05fde9f7-e125-55cb-8e8a-e453891d4249

STIX ID: report--05fde9f7-e125-55cb-8e8a-e453891d4249

Feed Name: Zscaler Security Research Blog

Threat Score
65/100

Date Published: 2025-04-02

Date Updated: 2026-05-01

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This report details a Fake Codec/Fake Anti-Virus social engineering campaign that used LastFM profiles to lure victims to redirector pages which chained 302 redirects to malicious download sites; samples (MD5s provided) were NSIS-packed installers that dropped a DLL to %AppData% and added an autorun registry entry, with domains and IPs tied to a Rusian dedicated hosting provider historically used for abuse.

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