Failure Audit Event ID: 18456 SQL Server Error



Hello Everybody,

I am getting the following error in MS SQL SERVER 2005 Enterprise Edition.

The IP reported does not even belong to our domain.

Does it means someone is trying to hack into our system or something else?

Any suggestions please?

Thanks
Anand

Event Type: Failure Audit
Event Source: MSSQLSERVER
Event Category: (4)
Event ID: 18456
Date: 2/20/2008
Time: 8:37:20 AM
User: N/A
Computer: TESTSERVER
Description:
Login failed for user 'sa'. [CLIENT: 74.218.89.234]

For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 18 48 00 00 0e 00 00 00 .H......
0008: 0b 00 00 00 54 00 45 00 ....T.E.
0010: 53 00 54 00 53 00 45 00 S.T.S.E.
0018: 52 00 56 00 45 00 52 00 R.V.E.R.
0020: 00 00 07 00 00 00 6d 00 ......m.
0028: 61 00 73 00 74 00 65 00 a.s.t.e.
0030: 72 00 00 00 r...




.



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