แบบนี้ Server โดนแอบฝั่งไฟล์ไวรัสหรือเปล่าครับ

พอดีทางผู้ให้บริการแจ้งมาทางเมลว่า แบบนี้โดนแล้วหรือเปล่าครับ

This is an urgent notice regarding the security of your Server.

External complaints report us of hacking attacks originating from your
Server. You will find further information on the nature of the attack at the end
of this e-mail.

This indicates that your Server has been infected with malicious software.
It is thus, unbeknown to you, part of a botnet and remote controlled by hackers.

*******************************************************************************
Please reply to this e-mail within 48 hours, preserving our reference

In case we should not receive any feedback from you, we would have to assume
that your Server has been captured by criminals. For your own security, your
Server would be disconnected.
*******************************************************************************

**Information from the attacked server*************************************
!!!
1393361115.770624 IP 70.208.103.136.53401 > xxx.168.55.65.52551: UDP, length 1
1393361115.770627 IP 70.208.103.136.53401 > xxx.168.55.65.16612: UDP, length 1
1393361115.770628 IP 70.208.103.136.53401 > xxx.168.55.65.10097: UDP, length 1
1393361115.770629 IP 70.208.103.136.53401 > xxx.168.55.65.2091: UDP, length 1
1393361115.770630 IP 70.208.103.136.53401 > xxx.168.55.65.31828: UDP, length 1
1393361115.770631 IP 70.208.103.136.53401 > xxx.168.55.65.32378: UDP, length 1
1393361115.770632 IP 70.208.103.136.53401 > xxx.168.55.65.24638: UDP, length 1
1393361115.770673 IP 70.208.103.136.53401 > xxx.168.55.65.35052: UDP, length 1
1393361115.770676 IP 70.208.103.136.53401 > xxx.168.55.65.41361: UDP, length 1
1393361115.770677 IP 70.208.103.136.53401 > xxx.168.55.65.18975: UDP, length 1
1393361115.770678 IP 70.208.103.136.53401 > xxx.168.55.65.23660: UDP, length 1
1393361115.770679 IP 70.208.103.136.53401 > xxx.168.55.65.54936: UDP, length 1
1393361115.770680 IP 70.208.103.136.53401 > xxx.168.55.65.55467: UDP, length 1
1393361115.770681 IP 70.208.103.136.53401 > xxx.168.55.65.56289: UDP, length 1
1393361115.770682 IP 70.208.103.136.53401 > xxx.168.55.65.21935: UDP, length 1
1393361115.770723 IP 70.208.103.136.53401 > xxx.168.55.65.64010: UDP, length 1
1393361115.770725 IP 70.208.103.136.53401 > xxx.168.55.65.27612: UDP, length 1
1393361115.770726 IP 70.208.103.136.53401 > xxx.168.55.65.16148: UDP, length 1
1393361115.770727 IP 70.208.103.136.53401 > xxx.168.55.65.10404: UDP, length 1
1393361115.770728 IP 70.208.103.136.53401 > xxx.168.55.65.472: UDP, length 1
1393361115.770729 IP 70.208.103.136.53401 > xxx.168.55.65.60220: UDP, length 1
1393361115.770730 IP 70.208.103.136.53401 > xxx.168.55.65.45239: UDP, length 1
1393361115.770774 IP 70.208.103.136.53401 > xxx.168.55.65.36221: UDP, length 1
1393361115.770776 IP 70.208.103.136.53401 > xxx.168.55.65.57321: UDP, length 1
1393361115.770777 IP 70.208.103.136.53401 > xxx.168.55.65.58567: UDP, length 1
1393361115.770778 IP 70.208.103.136.53401 > xxx.168.55.65.7524: UDP, length 1
1393361115.770779 IP 70.208.103.136.53401 > xxx.168.55.65.28183: UDP, length 1
1393361115.770780 IP 70.208.103.136.53401 > xxx.168.55.65.17780: UDP, length 1
1393361115.770781 IP 70.208.103.136.53401 > xxx.168.55.65.10623: UDP, length 1
1393361115.770782 IP 70.208.103.136.53401 > xxx.168.55.65.22366: UDP, length 1