Sudden increase of CPU and outbound connection

September 28, 2014 929 views

It's already a few times that this issue happened to my droplet. It seems that randomly the droplet start using 100% of the CPU and a big quantity of outbound bandwidth causing my server to slow down, then after some time (usually a few hours) the droplet instantly gets back to a normal situation. It's a very strange issue, i tried to monitor the processes and the outgoing connections but i can't see anything of unusual. I also tried to shutdown and restart the machine while I was having this issue but I couldn't fix it.
Do you have any idea why this could happen?

(I'm running lemp on an ubuntu machine)

  • Gut says compromised site, but I cannot say for sure. First thing I would test is this:

    ### Change web_folder to the folder your web files are stored ###
    fgrep "eval(base64" ${web_folder}* -R |grep ".js" -v

    If it comes back with results, past them here.

  • got no results

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