Showing posts from July, 2012

wtmp timeline efforts

In DFIR activities timelines are often determinant to understand what happened (lot of refs here ). Luckily Kristinn Gudjonsson provided the community with the great log2timeline tool ( here , from now l2t ) that, along with the invaluable Brian Carrier 's SleuthKit , gives a (temporal) order to chaos . But l2t is not currently considering valuable artifacts coming from wtmp / btmp files on Linux systems. wtmp (utmp? btmp!) For a rapid introduction to those files let's see what wikipedia says about them: " utmp, wtmp, btmp and variants such as utmpx, wtmpx and btmpx are files on Unix-like systems that keeps track of all logins and logouts to the system . The utmp file keeps track of the current login state of each user . The wtmp file records all logins and logouts history . The btmp file records failed login attempts . The utmp, wtmp and btmp files were never a part of any official Unix standard, such as Single UNIX Specificat