E4del and PINHOLE RATs Turn FTP Banners Into Dead Drops for Malware Commands

Cybersecurity researchers are calling attention to a new campaign that employs FTP banners as dead drop resolvers (DDRs) to deliver two previously unreported remote access trojans (RATs) tracked as E4del and PINHOLE. While threat actors are known to abuse legitimate services to point to additional command-and-control (C2) infrastructure and blend in with regular network traffic, the development

The article reports a malware campaign in which threat actors use FTP banners as dead drop resolvers to distribute two previously unreported remote access trojans, E4del and PINHOLE. This is a report of conventional malware tradecraft rather than an AI-specific attack, but it is relevant to AI security because the same infrastructure-abuse patterns can be used to conceal command-and-control activity around AI-enabled systems. RealGround analysis: the primary security implication is the need for stronger monitoring of indirect command channels, abuse-resistant network controls, and red-team testing for covert delivery paths.