Symantec seems to think this is a security risk - why would that be?

It doesn't seem to find it straight away, only after maybe 30 mins of mining. Bloodhound.SONAR.1 means that symantec doesn't know what it is but it is suspicious - http://securityresponse.symantec.com/security_response/writeup.jsp?docid=2006-070613-2739-99

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Security Risk Found!Bloodhound.SONAR.1 in File: c:\windows\system32\bcm.exe by: TruScan scan.  Action: Quarantine succeeded.  Action Description: The file was quarantined successfully.
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