APT / THREAT GROUP
SPHijacker
2
aliases
Last seen:Mar 17, 2026
Intelligence Profile
According to Trend Micro, this is a tool designed to disable security products, adopting two approaches to achieve this purpose. One approach terminates the security product process by using a vulnerable driver, zamguard64.sys, published by Zemana (vulnerability designated as CVE-2018-5713). Meanwhile, another approach disables process launching by using a new technique that they named stack rumbling.
Threat Analysis
SPHijacker is a known-sophistication threat actor of undetermined national origin, engaged in cyber operations with a primary motivation of unknown activity patterns.
External References
Quick Facts
TypeAPT / Threat Group
Aliases2
Also Known As
win.sphijackerSPHijacker
External Intelligence
Malpedia: win.sphijackerResearch Links
Data sourced from Malpedia, Ransomware.live, RansomLook, and CTIWATCH OSINT collection. Actor attribution is based on available intelligence and may be incomplete.