MALWARE FAMILY

Choziosi

Internal ID: win.choziosi

aliases

Last seen:Mar 17, 2026

Intelligence Profile

Choziosi is a browser hijacker for Chrome. It was first seen in January 2022. It commonly infects users via pirated media downloads like games, software, wallpapers or movies. The initial infectors are available for several platforms such as Mac and Windows.

Its main component is the Chrome browser extension written in JavaScript with the purpose of serving advertisments and hijacking search requests to Google, Yahoo and Bing.

Threat Analysis

Choziosi is a malware family tracked by threat intelligence researchers and catalogued in the Malpedia dataset. It represents a distinct malicious software lineage with identifiable code characteristics, behaviors, and victimology.

External References

→https://blogs.blackberry.com/en/2022/11/chromeloader-infects-the-browser-by-loading-malicious-extension

→https://blogs.vmware.com/security/2022/09/the-evolution-of-the-chromeloader-malware.html

→https://cybergeeks.tech/chromeloader-browser-hijacker

→https://github.com/xephora/Threat-Remediation-Scripts/tree/main/Threat-Track/CS_INSTALLER

→https://redcanary.com/blog/chromeloader/

→https://www.connectwise.com/blog/threat-report/smash-jacker

→https://www.gdatasoftware.com/blog/2022/01/37236-qr-codes-on-twitter-deliver-malicious-chrome-extension

Quick Facts

TypeMalware Family

Aliases1

Also Known As

win.choziosi

Research Links

MITRE ATT&CK VirusTotal Google (news) Twitter/X search

Data sourced from Malpedia, Ransomware.live, RansomLook, and CTIWATCH OSINT collection. Actor attribution is based on available intelligence and may be incomplete.

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