[BlueOnyx:06473] Excess permission or bad ownership on file /var/log/btmp

[Richard Barker]

  **Unmatched Entries**
  Address 85.17.212.2 maps to hosted-by.leaseweb.com, but this does not map back to the address - POSSIBLE BREAK-IN ATTEMPT! : 112 time(s)
  Excess permission or bad ownership on file /var/log/btmp : 1582 time(s)
  Address 113.161.71.62 maps to mail.fcc0.com.vn, but this does not map back to the address - POSSIBLE BREAK-IN ATTEMPT! : 73 time(s)

This is the permissions
-rw-r--r--  1 root   root          0 Nov 22 16:45 btmp

What should it be?
Thank you,

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  Richard C. Barker Sr.
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  ProBass Networks Inc.
    http://www.probassnetworks.net
    http://www.probass.net
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