Hdhub4u.tax.mkv ✓ «Official»

| Attribute | Details | |-----------|---------| | Filename | Hdhub4u.tax.mkv | | Extension | .mkv (Matroska Video) | | Observed Source | Hdhub4u (proxy domains: .tax, .rest, .mba) | | File Size | Typically 15MB–80MB (legit 1080p MKV would be 1.5GB+) | | First Seen (OSINT) | Early 2025 campaigns |

  • Process Anomaly: ffmpeg.exe or rundll32.exe spawning powershell.exe -enc

    • Using .tax instead of .mkv is a deliberate trick: Hdhub4u.tax.mkv