Malware Campaign Uses WhatsApp To Deliver VBS
Microsoft Defender Experts observed a WhatsApp-delivered Visual Basic Script (VBS) malware campaign starting in late February 2026 that uses renamed Windows utilities and cloud-hosted payloads. The multi-stage chain retrieves files from AWS, Tencent Cloud, and Backblaze B2, escalates privileges by modifying UAC and registry keys, and installs unsigned MSI installers (including AnyDesk) to establish persistence and remote access. Organizations should strengthen endpoint controls and cloud monitoring.
Scoring Rationale
Official Microsoft Defender report with concrete indicators and mitigation guidance increases credibility and actionability. High relevance to endpoint security and cloud monitoring; novelty is moderate since it adapts known living-off-the-land techniques. No freshness penalty (published today).
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Sources
- Read OriginalWhatsApp malware campaign delivers VBS payloads and MSI backdoorsmicrosoft.com
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