Four Stages, One Payload: The Code Delivery Chain CERT Polska Unpacked

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Four Stages, One Payload: The Code Delivery Chain CERT Polska Unpacked The chain CERT Polska described in its 23 September 2026 report has four execution stages, and the store-visible APK accounts for only the first of them. The structure is the campaign's central technical idea: keep the reviewed build small, then assemble the real capability after installation. Messenger Pro, removed from Google Play after CERT Polska reported it on 15 September 2026. This article follows the chain stage by stage and marks where the evidence comes from static analysis, from captured network traffic, and from

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