Ubuntu 16.04, root command sh took 400% cpus usage even after fresh reboot
I recently found out my Ubuntu has a process (shows in images) always took about 400% cpu usage for nothing. It is always there even I rebooted my PC and nothing has been done yet. I tried to kill it, but it regenerates in few seconds.
Screenshot from top – the first row, PID 4313, root, command sh:
I have searched for the similar problem but none of them is caused by this "root sh command". Anyone know why is it here and I can't get rid of it?
Any ideas will be a great help. Thanks!
Update:
Thanks @dessert. I think use screenshot in this case makes more sense. And I don't know how to paste the text from htop actually..
I'm actually new to everything here. htop looks a very handy tool to investigate the processes. It is ntpd that root is running. I found a similar issue from here for macOS by changing the Date & Time to automatic. But it doesn't work in my case. I feel it must be something simple to fix. But I just don't know how....
Update:
Solved the problem. I think it is some kind of bitcoin mining attack.
While the 'ntpd' was eating the cpu usage, I realized I didn't even have the ntpd installed...
which ntpd #returns nothing.
When I took a look at the strace -p, it gave me this:
There were 8 subprocesses. I don't know much about ntpd, but this looks unusual and suspicious..
Then I used following command to locate the executing files:
cd /proc/14503
sudo ls -l exe
Go to /cpu/bin folder, and I found the files faking 'ntpd' process. There was a cron.d file I think was used to regenerating process.
Delete the whole 'bin' folder, kill the process. The cpu usage was ceased and didn't come back again.
sudo rm -rv bin
sudo kill 14503
I didn't reboot my OS to verify whether it will be regenerated. But I will at least change my root passwd right away.. I don't know whether this means someone has my root passwd already. If yes, how and why could him have the pw?
16.04 command-line cpu
asked Aug 29 '18 at 0:41
Mengchen LinMengchen Lin
62
add a comment |
I recently found out my Ubuntu has a process (shows in images) always took about 400% cpu usage for nothing. It is always there even I rebooted my PC and nothing has been done yet. I tried to kill it, but it regenerates in few seconds.
Screenshot from top – the first row, PID 4313, root, command sh:
I have searched for the similar problem but none of them is caused by this "root sh command". Anyone know why is it here and I can't get rid of it?
Any ideas will be a great help. Thanks!
Update:
Thanks @dessert. I think use screenshot in this case makes more sense. And I don't know how to paste the text from htop actually..
I'm actually new to everything here. htop looks a very handy tool to investigate the processes. It is ntpd that root is running. I found a similar issue from here for macOS by changing the Date & Time to automatic. But it doesn't work in my case. I feel it must be something simple to fix. But I just don't know how....
Update:
Solved the problem. I think it is some kind of bitcoin mining attack.
While the 'ntpd' was eating the cpu usage, I realized I didn't even have the ntpd installed...
which ntpd #returns nothing.
When I took a look at the strace -p, it gave me this:
There were 8 subprocesses. I don't know much about ntpd, but this looks unusual and suspicious..
Then I used following command to locate the executing files:
cd /proc/14503
sudo ls -l exe
Go to /cpu/bin folder, and I found the files faking 'ntpd' process. There was a cron.d file I think was used to regenerating process.
Delete the whole 'bin' folder, kill the process. The cpu usage was ceased and didn't come back again.
sudo rm -rv bin
sudo kill 14503
I didn't reboot my OS to verify whether it will be regenerated. But I will at least change my root passwd right away.. I don't know whether this means someone has my root passwd already. If yes, how and why could him have the pw?
16.04 command-line cpu
asked Aug 29 '18 at 0:41
Mengchen LinMengchen Lin
62
4
Please don't post images of text. Instead, paste the text directly into your question and use the formatting tools.
– dessert
Aug 29 '18 at 5:23
Try to view process tree with dependencies usinghtopand add its screenshot to the question. Thisshprocess was called by some parent, but we can not determine it from your current screenshots.
– N0rbert
Aug 29 '18 at 9:17
add a comment |
I recently found out my Ubuntu has a process (shows in images) always took about 400% cpu usage for nothing. It is always there even I rebooted my PC and nothing has been done yet. I tried to kill it, but it regenerates in few seconds.
Screenshot from top – the first row, PID 4313, root, command sh:
I have searched for the similar problem but none of them is caused by this "root sh command". Anyone know why is it here and I can't get rid of it?
Any ideas will be a great help. Thanks!
Update:
Thanks @dessert. I think use screenshot in this case makes more sense. And I don't know how to paste the text from htop actually..
I'm actually new to everything here. htop looks a very handy tool to investigate the processes. It is ntpd that root is running. I found a similar issue from here for macOS by changing the Date & Time to automatic. But it doesn't work in my case. I feel it must be something simple to fix. But I just don't know how....
Update:
Solved the problem. I think it is some kind of bitcoin mining attack.
While the 'ntpd' was eating the cpu usage, I realized I didn't even have the ntpd installed...
which ntpd #returns nothing.
When I took a look at the strace -p, it gave me this:
There were 8 subprocesses. I don't know much about ntpd, but this looks unusual and suspicious..
Then I used following command to locate the executing files:
cd /proc/14503
sudo ls -l exe
Go to /cpu/bin folder, and I found the files faking 'ntpd' process. There was a cron.d file I think was used to regenerating process.
Delete the whole 'bin' folder, kill the process. The cpu usage was ceased and didn't come back again.
sudo rm -rv bin
sudo kill 14503
I didn't reboot my OS to verify whether it will be regenerated. But I will at least change my root passwd right away.. I don't know whether this means someone has my root passwd already. If yes, how and why could him have the pw?
16.04 command-line cpu
asked Aug 29 '18 at 0:41
Mengchen LinMengchen Lin
62
I recently found out my Ubuntu has a process (shows in images) always took about 400% cpu usage for nothing. It is always there even I rebooted my PC and nothing has been done yet. I tried to kill it, but it regenerates in few seconds.
Screenshot from top – the first row, PID 4313, root, command sh:
I have searched for the similar problem but none of them is caused by this "root sh command". Anyone know why is it here and I can't get rid of it?
Any ideas will be a great help. Thanks!
Update:
Thanks @dessert. I think use screenshot in this case makes more sense. And I don't know how to paste the text from htop actually..
I'm actually new to everything here. htop looks a very handy tool to investigate the processes. It is ntpd that root is running. I found a similar issue from here for macOS by changing the Date & Time to automatic. But it doesn't work in my case. I feel it must be something simple to fix. But I just don't know how....
Update:
Solved the problem. I think it is some kind of bitcoin mining attack.
While the 'ntpd' was eating the cpu usage, I realized I didn't even have the ntpd installed...
which ntpd #returns nothing.
When I took a look at the strace -p, it gave me this:
There were 8 subprocesses. I don't know much about ntpd, but this looks unusual and suspicious..
Then I used following command to locate the executing files:
cd /proc/14503
sudo ls -l exe
Go to /cpu/bin folder, and I found the files faking 'ntpd' process. There was a cron.d file I think was used to regenerating process.
Delete the whole 'bin' folder, kill the process. The cpu usage was ceased and didn't come back again.
sudo rm -rv bin
sudo kill 14503
I didn't reboot my OS to verify whether it will be regenerated. But I will at least change my root passwd right away.. I don't know whether this means someone has my root passwd already. If yes, how and why could him have the pw?
16.04 command-line cpu
16.04 command-line cpu
asked Aug 29 '18 at 0:41
Mengchen LinMengchen Lin
62
asked Aug 29 '18 at 0:41
Mengchen LinMengchen Lin
62
edited Sep 5 '18 at 0:05
Mengchen Lin
asked Aug 29 '18 at 0:41
Mengchen LinMengchen Lin
62
asked Aug 29 '18 at 0:41
Mengchen LinMengchen Lin
62
asked Aug 29 '18 at 0:41
Mengchen LinMengchen Lin
62
62
4
Please don't post images of text. Instead, paste the text directly into your question and use the formatting tools.
– dessert
Aug 29 '18 at 5:23
Try to view process tree with dependencies usinghtopand add its screenshot to the question. Thisshprocess was called by some parent, but we can not determine it from your current screenshots.
– N0rbert
Aug 29 '18 at 9:17
add a comment |
4
Please don't post images of text. Instead, paste the text directly into your question and use the formatting tools.
– dessert
Aug 29 '18 at 5:23
Try to view process tree with dependencies usinghtopand add its screenshot to the question. Thisshprocess was called by some parent, but we can not determine it from your current screenshots.
– N0rbert
Aug 29 '18 at 9:17
4
4
Please don't post images of text. Instead, paste the text directly into your question and use the formatting tools.
– dessert
Aug 29 '18 at 5:23
Please don't post images of text. Instead, paste the text directly into your question and use the formatting tools.
– dessert
Aug 29 '18 at 5:23
Try to view process tree with dependencies using
htop and add its screenshot to the question. This sh process was called by some parent, but we can not determine it from your current screenshots.– N0rbert
Aug 29 '18 at 9:17
Try to view process tree with dependencies using
htop and add its screenshot to the question. This sh process was called by some parent, but we can not determine it from your current screenshots.– N0rbert
Aug 29 '18 at 9:17
add a comment |
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4
Please don't post images of text. Instead, paste the text directly into your question and use the formatting tools.
– dessert
Aug 29 '18 at 5:23
Try to view process tree with dependencies using
htopand add its screenshot to the question. Thisshprocess was called by some parent, but we can not determine it from your current screenshots.– N0rbert
Aug 29 '18 at 9:17