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MediumSigmaHQFlorian Roth (Nextron Systems) +1

Hidden Executable In NTFS Alternate Data Stream

Detects the creation of an ADS (Alternate Data Stream) that contains an executable by looking at a non-empty Imphash

Detection logic

Detection requirements

Platform
Windows

The rule states no platform. This is derived from the ATT&CK technique it maps to.

Log source product
windows
Log source category
create_stream_hash

Known benign triggers

  • This rule isn't looking for any particular binary characteristics. As legitimate installers and programs were seen embedding hidden binaries in their ADS. Some false positives are expected from browser processes and similar.

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