StegoAd Extension Campaign is a threat campaign tracked across 1 threat cluster and 1 intelligence report mention on ThreatCluster. First observed June 29, 2026; most recent activity June 29, 2026.
Microsoft has dismantled the StegoAd operation, removing 119 malicious Edge extensions that used steganography to hide malware within image and font files. The campaign, active since 2021, targeted over 2.6 million…