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Full Discussion: Malicious perl script
Operating Systems Linux Debian Malicious perl script Post 302992369 by drysdalk on Friday 24th of February 2017 08:32:55 AM
Old 02-24-2017
Hi,

It certainly sounds like you've been sensible in how you've set up WordPress, from what you describe. And whilst it would be possible to conceal a malicious script in an image, this isn't commonly seen, and tends to be a result of far more subtle and advanced compromises than what you appear to be experiencing.

The main thing I suggest right now is to see if there are still any suspicious processes on your system at the moment. If there are, then you need to find out as much as you can about them before they exit or are killed off. If there aren't, then your next best avenue of investigation would be to look at your Web server logs for anything that appears out-of-the-ordinary.

On a Plesk-style system (if that is indeed what you have), these are typically stored as /var/www/vhosts/domain.com/logs/access_log, where domain.com should of course be replaced with your own Web site's domain. If it's a WordPress site, then any mention of the Perl interpreter or Perl scripts in those logs would constitute an abnormal finding.
 

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LEARN ABOUT SUNOS

nissetup

nissetup(1M)						  System Administration Commands					      nissetup(1M)

NAME

       nissetup - initialize a NIS+ domain

SYNOPSIS

       /usr/lib/nis/nissetup [-Y] [domain]

DESCRIPTION

       nissetup  is  a shell script that sets up a NIS+ domain to service clients that wish to store system administration information in a domain
       named domain. This domain should already exist prior to executing this command. See nismkdir(1) and nisinit(1M).

       A NIS+ domain consists of a  NIS+ directory and its subdirectories: org_dir and groups_dir. org_dir stores system  administration  informa-
       tion and  groups_dir stores information for group access control.

       nissetup  creates the subdirectories  org_dir and  groups_dir in  domain. Both subdirectories will be replicated on the same servers as the
       parent domain. After the subdirectories are created,  nissetup creates  the  default  tables  that  NIS+  serves.  These  are  auto_master,
       auto_home,  bootparams,	cred,  ethers, group, hosts, mail_aliases, netmasks, networks, passwd, protocols, rpc, services, and timezone. The
       nissetup script uses the nistbladm(1) command to create these tables. The script can be easily customized to add site specific tables  that
       are created at setup time.

       This command is normally executed just once per domain.

       While this command creates the default tables, it does not initialize them with data. This is accomplished with the  nisaddent(1M) command.

       It is easier to use the nisserver(1M) script to create subdirectories and the default tables.

OPTIONS

       -Y	Specify  that the domain will be served as both a NIS+ domain as well as an NIS domain using the backward compatibility flag. This
		will set up the domain to be less secure by making all the system tables readable by unauthenticated clients as well.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWnisu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       nis+(1), nismkdir(1), nistbladm(1), nisaddent(1M), nisinit(1M) nisserver(1M), attributes(5)

NOTES

       NIS+ might not be supported in future releases of the SolarisTM Operating Environment. Tools to aid the migration from  NIS+  to  LDAP  are
       available in the Solaris 9 operating environment. For more information, visit http://www.sun.com/directory/nisplus/transition.html.

SunOS 5.10							    13 Dec 2001 						      nissetup(1M)
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