Malvertising Sends Malware in Pieces, Then Makes the Browser Build the Executable

A malvertising operation dubbed SourTrade is making victims’ browsers build the final Windows executable themselves, using a legitimate Bun runtime as its base instead of serving one complete malicious file from a fixed URL.

Confiant, which detailed the campaign on July 23, 2026, said it has operated since late 2024 and impersonated TradingView, Solana, and Luno to target retail traders and