How to identify if mysterious programs in nethogs listing are malware? [on hold]

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http://askubuntu.com – This is what I see in nethogs: I am concerned about the listed items with PID ?, running as root. Could these be some kind of malware? Or is this normal? I am running Linux Mint 14 (Ubuntu-based). Please let me know what other information I should put here. (HowTos)