[1] A better understanding of habitat preferences would require surveys specifically aimed at the Malayan weasel because it is rarely detected by general camera trap, road mortality, and visual surveys.

[2] In Borneo, it was photographed in primary dipterocarp and logged forest at elevations of 177–1,032 m (581–3,386 ft).

Most records of the species occurred during the day, but more research is needed to determine whether Malayan weasels are also active nocturnally.

The majority of sightings have been of single animals, suggesting a solitary nature as seen in most weasel species of genus Mustela.

Though overall numbers are stable, Malayan weasels are protected in peninsular Malaysia and Thailand due to local declines.