04-04-2014
UNIX files timestamping - Need experts opinion as testimonial
Hi
I am requesting your help to obtain opinions and testimonials in order to be be able to make my own opinion since I am definetly not a unix expert.
Say we have a UNIX server.
On this server there is a specific directory let us call it "DIR"
A security incident have been reported related to this server.
Expert in forensics analyzed it and wrote this (modified a bit for confidentiality reasons)
Files : File1 to File14
"The above files were known to have been present in the directory. File system timestamps indicate that they were last accessed arround HH:MM on D Month Year and deleted around HH:MM on D Month Year. Investigators have attempted carving these files from free space on the system to determine their contents, however the files were unrecoverable. Some of there files may have been present for legitimate purposes."
Files : File15 to File20
"Due to the files' metadata having been overwritten, the initial date of their presence and their deletion date are unknown."
Since all files (File1 to File20) are supposed to have been present in the same directory (DIR) is it possible to succeed in identifying access and deletion timestamp of only a subset? Also File1 to File14 are assumed to be created and deleted earliest than File15 to File20 (fwe month to several years for some files)
Please give me your opinion only if you master unix file system and how files timestamps are managed.
The many the best.
Any way thank you very much for your time and help.
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LEARN ABOUT DEBIAN
unixserver
UNIXSERVER(1) General Commands Manual UNIXSERVER(1)
NAME
unixserver - UNIX domain socket server
SYNOPSIS
unixserver [options] socket program
DESCRIPTION
Unixserver is UNIX domain socket server that conform to UCSPI, the UNIX Client-Server Program Interface.
OPTIONS
-q Quiet. Do not print any messages.
-Q (default) Print error messages.
-v Verbose. Print error and status messages.
-d Do not delete the socket file on exit.
-D (default) Delete the socket file on exit.
-u UID Change user id to UID after creating socket.
-g GID Change group id to GID after creating socket.
-U Same as '-u $UID -g $GID'.
-o UID Make the socket owned by UID.
-r GID Make the socket group owned by GID.
-O Same as '-o $SOCKET_UID -r $SOCKET_GID'.
-p PERM
Set the permissions on the created socket (in octal). Note: this option, if set, overrides the mask below. (defaults to 0666 minus
umask)
-m MASK
Set umask to MASK (in octal) before creating socket. (defaults to 0, previous value is restored afterwards)
-c N Do not handle more than N simultaneous connections. (default 10)
-b N Allow a backlog of N connections.
-B BANNER
Write BANNER to the client immediately after connecting.
SEE ALSO
unixclient(1), unixcat(1) http://cr.yp.to/proto/ucspi.txt
AUTHOR
ucspi-unix package was written by Bruce Guenter <bruceg@em.ca>
This manual page was originally written by Tomas Kuliavas <tokul@bigfoot.com> for the Debian GNU/Linux system, but may be used elsewhere
under the GPL.
UNIXSERVER(1)