Redmondmag Signed Malware Deploys RMM Backdoors via Phishing Campaigns
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Microsoft's Defender Security Research Team reported phishing campaigns utilizing signed malware disguised as workplace applications. This malware, backed by a stolen EV certificate, installs remote monitoring and management (RMM) tools to maintain persistent access within enterprise environments, posing a significant risk to organizations. Enhanced certificate controls and monitoring of RMM activity are recommended to mitigate exposure.
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Updated 182d ago How this analysis works
Timeline
2026-03-03
Microsoft blog post details signed malware deployment
2026-03-05
Redmondmag article reports on phishing campaigns
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