how can sent smb annoymous packet like the picture below

Question

[smb annoymous packet]

I have tried empty username password and guest username and got different results than it

from impacket.smb import SMB_DIALECT
from impacket.smbconnection import SMBConnection


def main():
    conn = SMBConnection('*SMBSERVER', ip, sess_port=port, preferredDialect=SMB_DIALECT)
    conn.setTimeout(timeout=timeout)
    # conn.login(user='', password='')
    conn.login(user='guest', password='')
    share_list, lists = conn.listShares(), []
    for item in range(len(share_list)):
        lists.append((share_list[item]['shi1_netname'][:-1], share_list[item]['shi1_remark'][:-1]))
    print(lists)
    conn.logoff()


if __name__ == '__main__':
    ip, port, timeout = '192.168.20.102', 445, 15
    main()