GhostPoster Attack Uses PNG Icons to Compromise 50,000 Firefox Users

Gbhackers •Mayura Kathir • December 17, 2025

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GhostPoster Attack Compromises 50,000 Firefox Users via PNG Icons The GhostPoster malware campaign has compromised approximately 50,000 Firefox users by exploiting browser extensions that disguise malicious payloads within PNG icons. This attack utilizes a steganography technique to conceal the malware, making it difficult for users to detect the threat. Affected extensions include seemingly benign applications like 'Free VPN Forever.' 2 sources 27

Extracted Entities

Campaigns (1)

GhostPoster Attack