Tag: Matryoshka

Malware

HollowFrame Loader Deploys Matryoshka Backdoor in Spear-Phishing Attack on Law Firm

Cybersecurity researchers at Blackpoint Cyber have uncovered a previously undocumented Go-based loader framework called HollowFrame and a Rust-based malware family tracked as…

Active Directory reconnaissance Blackpoint Cyber command-and-control CVE-2026-50522

July 31, 2026

Malware

Matryoshka: A Rust-Based Backdoor with Dual C2 Mechanisms

Matryoshka is a Rust-based backdoor family deployed in attacks on law firms. It comes in two variants: one uses HTTP-based communication for…

command-and-control file transfer GitHub C2 HTTP C2

July 31, 2026