Articles tagged "steganography"

2 articles found

extension-securitysteganographymalware

Malware hidden in extension icons: how to check your browser for GhostPoster

GhostPoster hid malware inside extension icon images for up to five years across Chrome, Firefox, and Edge. Here's how steganography works and what to check.

Maxim Kosterin

June 1, 2026

8 min read

extension-securitysleeper-extensionsfirefox

Sleeper extensions go cross-browser: how to find hidden malware in your Firefox, Chrome, and Edge add-ons

17 malicious sleeper extensions found across Firefox, Chrome, and Edge with 840K downloads. They hid malware in images for up to 5 years undetected.

Maxim Kosterin

February 14, 2026

8 min read