How UNC5142 Hijacked WordPress & Blockchain for Next-Gen Stealer Attacks (2025)
In October 2025, threat actor UNC5142 leveraged compromised WordPress sites to distribute a wave of information-stealing malware using an innovative attack method dubbed 'EtherHiding.' The adversaries abused blockchain-based smart contracts to conceal malicious code, enabling malware such as Atomic Stealer, Lumma, Rhadamanthys, and Vidar to infect both Windows and macOS endpoints. This technique allowed attackers to rapidly update payloads beyond the reach of static blocklists and frequently evade traditional security controls. Victims included a variety of enterprises and individuals, with attackers capitalizing on the popularity and trust of infected WordPress content management platforms. This incident highlights an emerging TTP where blockchain infrastructure is repurposed to enhance delivery persistence and obfuscation for criminal campaigns. The rapid uptake of such blockchain-based methods demonstrates the need for organizations to evolve threat detection and response strategies as attackers diversify beyond conventional web infrastructure.
Kill Chain