Possible LKM Trojan installed

Hi

i have run chkrootkit on my box and it found:

Checking `lkm'... You have 2 process hidden for readdir command
You have 2 process hidden for ps command
Warning: Possible LKM Trojan installed


i have run other 2 time but it dont have found nothing... how can be sure that i dont have it?

 

 

 

 

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