Steganography Secrets: Malware Hidden in Plain Sight

This report analyzes steganography-driven campaigns (2023–2025) in which attackers hide Base64-encoded DotNET loaders and malware (notably Remcos RAT, Agent Tesla, and XWorm) inside seemingly benign images hosted on sites like uploaddeimagens.com.br and archive.org; the typical chain uses a JS dropper to fetch an image, extract a loader, and inject payloads into memory to evade EDR and enable stealthy, finance-themed intrusions.