Threats Tagged 'iso-bmff'
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Threats Tagged 'iso-bmff'
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Fake MP4 File Carries Malicious Payload 0 A sophisticated infection chain leverages PowerShell loaders to deliver encrypted NetSupport client payloads concealed within fake MP4 files. The malicious MP4 containers appear valid to basic file-type checks but contain 6.5 MB of encrypted data in ISO Base Media File Format uuid extension boxes rather than playable video content. The attack begins with PowerShell delivered via Cloudflare-fronted infrastructure, performing environment checks before retrieving the carrier file. A secondary script parses the MP4 structure, extracts and decrypts an embedded 16.8 MB PowerShell payload, then deploys NetSupport Manager with silent operation configured. Infrastructure spans 40 live endpoints across six autonomous systems, primarily in Frankfurt and Los Angeles, with command-and-control gateways registered 77 seconds apart. The toolkit employs Russian-language business site decoys and rotates carriers frequently without backward compatibility. Join the discussion | AlienVault OTX General | 08/29/2026, 00:24:24 UTC Added: 08/31/2026, 09:52:14 UTC |
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