This process that has come out of nowhere is hogging my CPU and I have no clue what it is or how to get rid of it. You can see in the image below what it's doing:

Process that's hogging my cpu

What is this process? How can I get rid of it?

Every time I kill the process, it spawns back up within a minute or less.

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    Well I was told to post in security instead of stack overflow and then I realized it might make most sense here. – Tony Friz Dec 11 '18 at 20:11
  • This is a virus, if this is on a production system somewhere you need to initiate your disaster response plan if you have one. If not, take a forensic image of the server and spin down the machine and start over from scratch. Install from a known good image of the OS and use backups from an earlier date when this process was not present. Contact your local authorities and everyone relevant in your organization. User Michael Prokopec's advice is solid. From the other threads those users have sound advice too. It is going to be easier to start from scratch than save this one to be honest. – kemotep Dec 11 '18 at 20:17
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    sudhakarbellamkonda.blogspot.com/2018/11/… – user8779 Dec 11 '18 at 20:22
  • @kemotep So, this is just a test machine in a small office and I just literally a few weeks ago started from scratch because of a virus doing the same thing under a different name. And now, same thing a few weeks later... What am I doing wrong? My root password is very secure and not possible to guess by any bruteforce attempt. How is someone repeatedly installing malware on my machine? I don't have the experience for this... – Tony Friz Dec 11 '18 at 20:38

Looks like you have a virus or worm of some kind. Can't find anything about it on the web so you might have close to the first case. It is trying to masquerade as watchdog which is an anti-virus and anti-mailware process. So I would call a major antivirus company and make them aware, send them a copy. Do the same for your distro's watchdog maintainer. This can be found in the package information for watchdog.

  • The only thing I can suggest to try to remove this is check all of your startup lists and check for changes. Look for the process script. Like, whereis watchbog, if it gives you the location of the binary, write it down. Boot to a live cd/usb and then find that file on your disk and remove it.
  • Also look through your startups again.
  • Turn your firewall on and set it to block outgoing temporarily look to see if your system is looking to re-download it after removal. If it is, there is a hidden process that is making sure you stay infected. Either track it down and remove, or get the files you need off and quarantine them and scan them, make sure none of them have the execute bit set unless you know what they do.
  • Then DBAN the drive and reinstall your OS, and then use clamAV, chkrootkit and rkhunter. You must either set up the clamav daemon or run manualy like the others to maintain a clean system.
  • Rescan the files you copied off the system before the DBAN, to make sure they are clean, before using them again.
  • Whoa boy... OK, thanks for the elaborate reply. I will look into this as best I can (I'm not terribly familiar with Linux but might be enough). – Tony Friz Dec 11 '18 at 20:13
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    Just to mention, watchbog is in /bin/watchbog but when I delete it, it reappears a bit later. – Tony Friz Dec 11 '18 at 20:13
  • Looks like it is trying to reinstall its self. Try to make a file with that name before it comes back or write a script to mv that file to watchdog.bak and your file to its place, that may cripple the infection because then the file then already exists make sure your version is read only after the move. – Michael Prokopec Dec 11 '18 at 20:22
  • I've created my own watchbog file under root permissions and it seems to have accomplished what you said it might. Thank you for that. So at the very least the virus is being temporarily kept at bay. – Tony Friz Dec 11 '18 at 22:38
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    When a trojan (probably a bitcoin miner) is running as root, the system has been severely compromised. The solution is NOT to try to find and delete the malware. The solution is to take the system off line as soon as possible and then do a complete reinstall. See e.g. How do I deal with a compromised server? – Kusalananda Dec 12 '18 at 7:50

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