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Mysterious files appeared on my webserver

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#1 DiMono


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Posted 21 November 2016 - 04:01 PM

While searching on my Hostwinds webserver for a specific file, I noticed some files in a website root directory that I did not put there. Those files are:


27243AD4E44FB1E2CDCEECED32926EA5.txt with contents:





D60ED30DA1AF9F372DEA37DB0BA959CD.txt with contents:





Some google-fu revealed that comodoca.com redirects to comodo's website, which I know is legitimate, but the presence of the files when I did not create them is suspicious. Further, the website whose root they are in is an add-on domain not contained within the public_html directory, and it is very strange to me that someone would break into the server (on two occasions almost 24 hours apart) and put two text files in such a basically trivial location. Has anyone had any experiences with something similar in the past? I'm more confused than anything else.

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#2 12throw8outthewindow


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Posted 22 November 2016 - 11:26 AM

Thanks for posting about this DiMono. I would also like to know about it. I have found similar files cropping up in the root directory of several of my WordPress installations, one per day from 11/12/16 to 11/20/16. They have appeared in my top level domain, and one add-on domain. However, they do not appear in my other two add-on domains. One of the add-on domains without files in the root directory has 2 no-index subdomains, and they don't appear in one, but there are files for 11/12 and 11/13 only in the other. I downloaded a couple of the files from one installation, and then deleted them, which had no visible effect on the site.


The Wordfence security plugin (which includes a firewall that blocks malicious uploads) is active in all of these installations. Since they are txt files, I don't know that they are doing any harm, but since I didn't put them there, nor have I installed any new plugin or theme to all of the affected installations during that time period that might have included them, I am quite concerned about how they got there.

Edited by 12throw8outthewindow, 22 November 2016 - 11:27 AM.

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