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SmokeBuster

ID: e2369e67-1f48-5705-8c9b-d7392dbbc151

STIX ID: report--e2369e67-1f48-5705-8c9b-d7392dbbc151

Feed Name: Zscaler Security Research Blog

Threat Score
70/100

Date Published: 2025-04-02

Date Updated: 2026-05-01

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This report analyzes SmokeLoader (2018–2022), describing how its stager and main module operate, how persistence is achieved via a scheduled task executed every 10 minutes, and how coding errors cause repeated injections into explorer.exe and the creation of persistent anti-analysis threads that are not cleaned up—resulting in progressive resource exhaustion and severe system slowdown on infected hosts.

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