The LDAP "sambaNTPassword" attribute is really just an MD4 hash of the UTF-16LE encoded password.

Using bash(1) with iconv(1) and openssl(1), it may be generated like so:

    (read -s pw; printf '%s' "$pw" |iconv -futf8 -tutf-16le |openssl md4 -hex |tr a-z A-Z)

Using perl(1) it looks like this:

    use Digest::MD4 'md4_hex';
    use Encode 'encode';
    sub nthash { uc md4_hex encode('UTF-16LE', shift) }

Don't ever do this, it's insecure as fuck: https://en.wikipedia.org/wiki/MD4#Security