GhostPoster Malware Discovered in Popular Browser Extensions

GhostPoster Malware Discovered in Popular Browser Extensions

First seen 24 Jan 2026, 17:45 UTC •Findarticles •59% similarity •28.8

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Security researchers have identified a malware campaign named GhostPoster embedded in 17 widely used browser extensions for Chrome and Firefox. The malware is designed to operate stealthily, affecting users who install these compromised extensions. Key technical details about the malware's functionality and distribution methods are still being investigated.

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GhostPoster Firefox