Our system was hacked Post: 303037161

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Special Forums Cybersecurity Our system was hacked Post 303037161 by MadeInGermany on Thursday 25th of July 2019 03:13:26 AM

07-25-2019

Registered User

Look in root's homedir for .history .bash_history or similar files.
Run the history command in the respective shell(s).

Ordinary system logins are listed with the last command.

Consult the system logs, for system access and unusual events.
Is there a su or sudo log in /var/log/ or /var/adm/?
Do you happen to have system accounting (sa) running?

Run netstat -a and look for LISTEN; what services are running that use the ports?
Do these services have extra logs?

How good is your root pw? The longer the better.
Did you switch from the 13byte Unix crypt to another crypt that allows longer pws?

Are you sure your system was hacked at all?
Maybe there was a fatal human error like

Code:

tar cf - dir | tar xf -

where the read files are already opened for writing, and such data corruptions can occur.

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db_printlog

db_printlog(8)						      System Manager's Manual						    db_printlog(8)

NAME

       db_printlog - Displays database log file (Enhanced Security)

SYNOPSIS

       /usr/tcb/bin/db_printlog [-h home]

FLAGS

       Specify a home directory for the database.  The correct directory for enhanced security is /var/tcb/files.

DESCRIPTION

       A  customized  version of the Berkeley Database (Berkeley DB) is embedded in the operating system to provide high-performance database sup-
       port for critical security files.  The DB includes full transactional support and database recovery, using write-ahead logging  and  check-
       pointing to record changes.

       The db_printlog utility provides a way to view the log file associated with the security database.

RETURN VALUES

       The db_printlog utility exits 0 on success, and >0 if an error occurs.

ENVIRONMENT VARIABLES

       If  the	-h  option  is	not  specified and the environment variable DB_HOME is set, it is used as the path of the database home.  The home
       directory for security is /var/tcb/files.

FILES

       /var/tcb/files/auth.db

       /var/tcb/files/dblogs/*

RELATED INFORMATION

       Commands: db_checkpoint(8), db_recover(8), db_stat(8) delim off

																    db_printlog(8)