Our system was hacked Post: 303037142

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Special Forums Cybersecurity Our system was hacked Post 303037142 by jgt on Wednesday 24th of July 2019 05:19:52 PM

07-24-2019

Registered User

Our system was hacked

Someone made a mistake, and left our router wide open, pointing all ports to a SCO 6.0.0 system.
Within 24 hours, the following happened.
The contents of all the files (except tar files) in three directories, one directory on each of three different file systems, were replaced with nulls. None of the inode data was changed, meaning that the output of 'ls -l' was the same before and after. In two of the directories the file permissions were 0664, and in the last, the permissions were 0644 and files owned by root.
I have not been able to find anything in any of the log files to indicate who or when this happened.
Since we had adequate backups there was no long term damage.
Any thoughts would be appreciated.

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LEARN ABOUT SUSE

chkstat

CHKSTAT(8)					      Tool to check and set file permissions						CHKSTAT(8)

NAME

       chkstat - Tool to check and set file permissions

SYNOPSIS

       chkstat [--set|-set] [--noheader] [[--examine file ]...]  [[--files filelist ]...]  [[--root directory ]...]  permission-file ...

DESCRIPTION

       The program /usr/bin/chkstat is a tool to check and set file permissions.

       Multiple  permissions  files can be given on the commandline.  If the permission files contain multiple entries for a single file, the last
       entry found will be used.

   General Options
       --set, -set
	      This option enables setting the file permissions, the default is to check and warn only.

       --noheader
	      Omit printing the output header lines.

       --examine file
	      Check permissions for this file and not all files listed in the permissions files.

       --files filelist
	      Check permissions for the files listed in filelist and not for all files listed in the permissions files.

       --root directory
	      Prefix the files given in the permissions files by this directory.

EXAMPLE

       The command

	      chkstat -set /etc/permissions

       will parse the file /etc/permissions and set the access mode and the user- and group memberships each file listed. The format for the input
       file is

       FILEPATH OWNER:GROUP MODE

       and wildcards are not supported for the filepath. Lines starting with '#' and empty lines are treated as comments.

COPYRIGHT

       1996-2003 SuSE Linux AG, Nuernberg, Germany.

       2008 SUSE LINUX Products GmbH

AUTHORS

       Reinhold Sojer, Ruediger Oertel, Michael Schroeder

       Useful changes and additions by Tobias Burnus

3rd Berkeley Distribution					    2008-04-17								CHKSTAT(8)