Linux Auditd Best Practice Configuration

audit.rules

# IMPORTANT!
# This gist has been transformed into a github repo 
# You can find the most recent version there:
# https://github.com/Neo23x0/auditd

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#    / /| |/ / / / __  / / __/ __  / 
#   / ___ / /_/ / /_/ / / /_/ /_/ /  
#  /_/  |_\__,_/\__,_/_/\__/\__,_/   
#                                    
# Linux Audit Daemon - Best Practice Configuration 
# /etc/audit/audit.rules
#
# Compiled by Florian Roth
# 
# Created  : 2017/12/05 
# Modified : 2018/08/05
# 
# Based on rules published here:
#   Gov.uk auditd rules
#   	https://github.com/gds-operations/puppet-auditd/pull/1
# 	CentOS 7 hardening
# 		https://highon.coffee/blog/security-harden-centos-7/#auditd---audit-daemon
# 	Linux audit repo 
# 		https://github.com/linux-audit/audit-userspace/tree/master/rules
# 	Auditd high performance linux auditing
# 		https://linux-audit.com/tuning-auditd-high-performance-linux-auditing/
#
# Further rules
# 	For PCI DSS compliance see: 
# 		https://github.com/linux-audit/audit-userspace/blob/master/rules/30-pci-dss-v31.rules
# 	For NISPOM compliance see:
# 		https://github.com/linux-audit/audit-userspace/blob/master/rules/30-nispom.rules

# Remove any existing rules
-D

# Buffer Size
## Feel free to increase this if the machine panic's
-b 8192

# Failure Mode
## Possible values: 0 (silent), 1 (printk, print a failure message), 2 (panic, halt the system)
-f 1

# Ignore errors
## e.g. caused by users or files not found in the local environment  
-i 

# Self Auditing ---------------------------------------------------------------

## Audit the audit logs
### Successful and unsuccessful attempts to read information from the audit records
-w /var/log/audit/ -k auditlog

## Auditd configuration
### Modifications to audit configuration that occur while the audit collection functions are operating
-w /etc/audit/ -p wa -k auditconfig
-w /etc/libaudit.conf -p wa -k auditconfig
-w /etc/audisp/ -p wa -k audispconfig

## Monitor for use of audit management tools
-w /sbin/auditctl -p x -k audittools
-w /sbin/auditd -p x -k audittools

# Filters ---------------------------------------------------------------------

### We put these early because audit is a first match wins system.

## Ignore SELinux AVC records
-a always,exclude -F msgtype=AVC

## Ignore current working directory records
-a always,exclude -F msgtype=CWD

## Ignore EOE records (End Of Event, not needed)
-a always,exclude -F msgtype=EOE

## Cron jobs fill the logs with stuff we normally don't want (works with SELinux)
-a never,user -F subj_type=crond_t
-a exit,never -F subj_type=crond_t

## This prevents chrony from overwhelming the logs
-a never,exit -F arch=b64 -S adjtimex -F auid=unset -F uid=chrony -F subj_type=chronyd_t

## This is not very interesting and wastes a lot of space if the server is public facing
-a always,exclude -F msgtype=CRYPTO_KEY_USER

## VMWare tools
-a exit,never -F arch=b32 -S fork -F success=0 -F path=/usr/lib/vmware-tools -F subj_type=initrc_t -F exit=-2
-a exit,never -F arch=b64 -S fork -F success=0 -F path=/usr/lib/vmware-tools -F subj_type=initrc_t -F exit=-2

### High Volume Event Filter (especially on Linux Workstations)
-a exit,never -F arch=b32 -F dir=/dev/shm -k sharedmemaccess
-a exit,never -F arch=b64 -F dir=/dev/shm -k sharedmemaccess
-a exit,never -F arch=b32 -F dir=/var/lock/lvm -k locklvm
-a exit,never -F arch=b64 -F dir=/var/lock/lvm -k locklvm

## More information on how to filter events
### https://access.redhat.com/solutions/2482221

# Rules -----------------------------------------------------------------------

## Kernel parameters
-w /etc/sysctl.conf -p wa -k sysctl

## Kernel module loading and unloading
-a always,exit -F perm=x -F auid!=-1 -F path=/sbin/insmod -k modules
-a always,exit -F perm=x -F auid!=-1 -F path=/sbin/modprobe -k modules
-a always,exit -F perm=x -F auid!=-1 -F path=/sbin/rmmod -k modules
-a always,exit -F arch=b64 -S finit_module -S init_module -S delete_module -F auid!=-1 -k modules
-a always,exit -F arch=b32 -S finit_module -S init_module -S delete_module -F auid!=-1 -k modules
## Modprobe configuration
-w /etc/modprobe.conf -p wa -k modprobe

## KExec usage (all actions)
-a always,exit -F arch=b64 -S kexec_load -k KEXEC
-a always,exit -F arch=b32 -S sys_kexec_load -k KEXEC

## Special files
-a exit,always -F arch=b32 -S mknod -S mknodat -k specialfiles
-a exit,always -F arch=b64 -S mknod -S mknodat -k specialfiles

## Mount operations (only attributable)
-a always,exit -F arch=b64 -S mount -S umount2 -F auid!=-1 -k mount
-a always,exit -F arch=b32 -S mount -S umount -S umount2 -F auid!=-1 -k mount

# Change swap (only attributable)
-a always,exit -F arch=b64 -S swapon -S swapoff -F auid!=-1 -k swap
-a always,exit -F arch=b32 -S swapon -S swapoff -F auid!=-1 -k swap

## Time
-a exit,always -F arch=b32 -S adjtimex -S settimeofday -S clock_settime -k time
-a exit,always -F arch=b64 -S adjtimex -S settimeofday -S clock_settime -k time
### Local time zone
-w /etc/localtime -p wa -k localtime

## Stunnel
-w /usr/sbin/stunnel -p x -k stunnel

## Cron configuration & scheduled jobs
-w /etc/cron.allow -p wa -k cron
-w /etc/cron.deny -p wa -k cron
-w /etc/cron.d/ -p wa -k cron
-w /etc/cron.daily/ -p wa -k cron
-w /etc/cron.hourly/ -p wa -k cron
-w /etc/cron.monthly/ -p wa -k cron
-w /etc/cron.weekly/ -p wa -k cron
-w /etc/crontab -p wa -k cron
-w /var/spool/cron/crontabs/ -k cron

## User, group, password databases
-w /etc/group -p wa -k etcgroup
-w /etc/passwd -p wa -k etcpasswd
-w /etc/gshadow -k etcgroup
-w /etc/shadow -k etcpasswd
-w /etc/security/opasswd -k opasswd

## Sudoers file changes
-w /etc/sudoers -p wa -k actions

## Passwd
-w /usr/bin/passwd -p x -k passwd_modification

## Tools to change group identifiers
-w /usr/sbin/groupadd -p x -k group_modification
-w /usr/sbin/groupmod -p x -k group_modification
-w /usr/sbin/addgroup -p x -k group_modification
-w /usr/sbin/useradd -p x -k user_modification
-w /usr/sbin/usermod -p x -k user_modification
-w /usr/sbin/adduser -p x -k user_modification

## Login configuration and information
-w /etc/login.defs -p wa -k login
-w /etc/securetty -p wa -k login
-w /var/log/faillog -p wa -k login
-w /var/log/lastlog -p wa -k login
-w /var/log/tallylog -p wa -k login

## Network Environment
### Changes to hostname
-a always,exit -F arch=b32 -S sethostname -S setdomainname -k network_modifications
-a always,exit -F arch=b64 -S sethostname -S setdomainname -k network_modifications
### Changes to other files
-w /etc/hosts -p wa -k network_modifications
-w /etc/sysconfig/network -p wa -k network_modifications
-w /etc/network/ -p wa -k network
-a always,exit -F dir=/etc/NetworkManager/ -F perm=wa -k network_modifications
-w /etc/sysconfig/network -p wa -k network_modifications
### Changes to issue
-w /etc/issue -p wa -k etcissue
-w /etc/issue.net -p wa -k etcissue

## System startup scripts
-w /etc/inittab -p wa -k init
-w /etc/init.d/ -p wa -k init
-w /etc/init/ -p wa -k init

## Library search paths
-w /etc/ld.so.conf -p wa -k libpath

## Pam configuration
-w /etc/pam.d/ -p wa -k pam
-w /etc/security/limits.conf -p wa  -k pam
-w /etc/security/pam_env.conf -p wa -k pam
-w /etc/security/namespace.conf -p wa -k pam
-w /etc/security/namespace.init -p wa -k pam

## Postfix configuration
-w /etc/aliases -p wa -k mail
-w /etc/postfix/ -p wa -k mail

## SSH configuration
-w /etc/ssh/sshd_config -k sshd

# Systemd
-w /bin/systemctl -p x -k systemd 
-w /etc/systemd/ -p wa -k systemd

## SELinux events that modify the system's Mandatory Access Controls (MAC)
-w /etc/selinux/ -p wa -k mac_policy

## Critical elements access failures 
-a exit,always -F arch=b64 -S open -F dir=/etc -F success=0 -k unauthedfileaccess
-a exit,always -F arch=b64 -S open -F dir=/bin -F success=0 -k unauthedfileaccess
-a exit,always -F arch=b64 -S open -F dir=/sbin -F success=0 -k unauthedfileaccess
-a exit,always -F arch=b64 -S open -F dir=/usr/bin -F success=0 -k unauthedfileaccess
-a exit,always -F arch=b64 -S open -F dir=/usr/sbin -F success=0 -k unauthedfileaccess
-a exit,always -F arch=b64 -S open -F dir=/var -F success=0 -k unauthedfileaccess
-a exit,always -F arch=b64 -S open -F dir=/home -F success=0 -k unauthedfileaccess
-a exit,always -F arch=b64 -S open -F dir=/srv -F success=0 -k unauthedfileaccess

## Process ID change (switching accounts) applications
-w /bin/su -p x -k priv_esc
-w /usr/bin/sudo -p x -k priv_esc
-w /etc/sudoers -p rw -k priv_esc

## Power state
-w /sbin/shutdown -p x -k power
-w /sbin/poweroff -p x -k power
-w /sbin/reboot -p x -k power
-w /sbin/halt -p x -k power

## Session initiation information
-w /var/run/utmp -p wa -k session
-w /var/log/btmp -p wa -k session
-w /var/log/wtmp -p wa -k session

## Discretionary Access Control (DAC) modifications
-a always,exit -F arch=b32 -S chmod -F auid>=500 -F auid!=4294967295 -k perm_mod
-a always,exit -F arch=b32 -S chown -F auid>=500 -F auid!=4294967295 -k perm_mod
-a always,exit -F arch=b32 -S fchmod -F auid>=500 -F auid!=4294967295 -k perm_mod
-a always,exit -F arch=b32 -S fchmodat -F auid>=500 -F auid!=4294967295 -k perm_mod
-a always,exit -F arch=b32 -S fchown -F auid>=500 -F auid!=4294967295 -k perm_mod
-a always,exit -F arch=b32 -S fchownat -F auid>=500 -F auid!=4294967295 -k perm_mod
-a always,exit -F arch=b32 -S fremovexattr -F auid>=500 -F auid!=4294967295 -k perm_mod
-a always,exit -F arch=b32 -S fsetxattr -F auid>=500 -F auid!=4294967295 -k perm_mod
-a always,exit -F arch=b32 -S lchown -F auid>=500 -F auid!=4294967295 -k perm_mod
-a always,exit -F arch=b32 -S lremovexattr -F auid>=500 -F auid!=4294967295 -k perm_mod
-a always,exit -F arch=b32 -S lsetxattr -F auid>=500 -F auid!=4294967295 -k perm_mod
-a always,exit -F arch=b32 -S removexattr -F auid>=500 -F auid!=4294967295 -k perm_mod
-a always,exit -F arch=b32 -S setxattr -F auid>=500 -F auid!=4294967295 -k perm_mod
-a always,exit -F arch=b64 -S chmod  -F auid>=500 -F auid!=4294967295 -k perm_mod
-a always,exit -F arch=b64 -S chown -F auid>=500 -F auid!=4294967295 -k perm_mod
-a always,exit -F arch=b64 -S fchmod -F auid>=500 -F auid!=4294967295 -k perm_mod
-a always,exit -F arch=b64 -S fchmodat -F auid>=500 -F auid!=4294967295 -k perm_mod
-a always,exit -F arch=b64 -S fchown -F auid>=500 -F auid!=4294967295 -k perm_mod
-a always,exit -F arch=b64 -S fchownat -F auid>=500 -F auid!=4294967295 -k perm_mod
-a always,exit -F arch=b64 -S fremovexattr -F auid>=500 -F auid!=4294967295 -k perm_mod
-a always,exit -F arch=b64 -S fsetxattr -F auid>=500 -F auid!=4294967295 -k perm_mod
-a always,exit -F arch=b64 -S lchown -F auid>=500 -F auid!=4294967295 -k perm_mod
-a always,exit -F arch=b64 -S lremovexattr -F auid>=500 -F auid!=4294967295 -k perm_mod
-a always,exit -F arch=b64 -S lsetxattr -F auid>=500 -F auid!=4294967295 -k perm_mod
-a always,exit -F arch=b64 -S removexattr -F auid>=500 -F auid!=4294967295 -k perm_mod
-a always,exit -F arch=b64 -S setxattr -F auid>=500 -F auid!=4294967295 -k perm_mod

# Special Rules ---------------------------------------------------------------

## 32bit API Exploitation
### If you are on a 64 bit platform, everything _should_ be running
### in 64 bit mode. This rule will detect any use of the 32 bit syscalls
### because this might be a sign of someone exploiting a hole in the 32
### bit API.
-a always,exit -F arch=b32 -S all -k 32bit_api

## Reconnaissance
-w /usr/bin/whoami -p x -k recon
-w /etc/issue -p r -k recon
-w /etc/hostname -p r -k recon

## Suspicious activity
-w /usr/bin/wget -p x -k susp_activity
-w /usr/bin/curl -p x -k susp_activity
-w /usr/bin/base64 -p x -k susp_activity
-w /bin/nc -p x -k susp_activity
-w /bin/netcat -p x -k susp_activity
-w /usr/bin/ncat -p x -k susp_activity
-w /usr/bin/ssh -p x -k susp_activity
-w /usr/bin/socat -p x -k susp_activity
-w /usr/bin/wireshark -p x -k susp_activity
-w /usr/bin/rawshark -p x -k susp_activity
-w /usr/bin/rdesktop -p x -k sbin_susp

## Sbin suspicious activity
-w /sbin/iptables -p x -k sbin_susp 
-w /sbin/ifconfig -p x -k sbin_susp
-w /usr/sbin/tcpdump -p x -k sbin_susp
-w /usr/sbin/traceroute -p x -k sbin_susp

## Injection 
### These rules watch for code injection by the ptrace facility.
### This could indicate someone trying to do something bad or just debugging
-a always,exit -F arch=b32 -S ptrace -k tracing
-a always,exit -F arch=b64 -S ptrace -k tracing
-a always,exit -F arch=b32 -S ptrace -F a0=0x4 -k code_injection
-a always,exit -F arch=b64 -S ptrace -F a0=0x4 -k code_injection
-a always,exit -F arch=b32 -S ptrace -F a0=0x5 -k data_injection
-a always,exit -F arch=b64 -S ptrace -F a0=0x5 -k data_injection
-a always,exit -F arch=b32 -S ptrace -F a0=0x6 -k register_injection
-a always,exit -F arch=b64 -S ptrace -F a0=0x6 -k register_injection

## Privilege Abuse
### The purpose of this rule is to detect when an admin may be abusing power by looking in user's home dir.
-a always,exit -F dir=/home -F uid=0 -F auid>=1000 -F auid!=4294967295 -C auid!=obj_uid -k power_abuse

# Software Management ---------------------------------------------------------

# RPM (Redhat/CentOS)
-w /usr/bin/rpm -p x -k software_mgmt
-w /usr/bin/yum -p x -k software_mgmt

# YAST/Zypper/RPM (SuSE)
-w /sbin/yast -p x -k yast
-w /sbin/yast2 -p x -k yast
-w /bin/rpm -p x -k software_mgmt
-w /usr/bin/zypper -k software_mgmt

# DPKG / APT-GET (Debian/Ubuntu)
-w /usr/bin/dpkg -p x -k software_mgmt
-w /usr/bin/apt-add-repository -p x -k software_mgmt
-w /usr/bin/apt-get -p x -k software_mgmt
-w /usr/bin/aptitude -p x -k software_mgmt

# Special Software ------------------------------------------------------------

## GDS specific secrets
-w /etc/puppet/ssl -p wa -k puppet_ssl

## IBM Bigfix BESClient 
-a exit,always -F arch=b64 -S open -F dir=/opt/BESClient -F success=0 -k soft_besclient
-w /var/opt/BESClient/ -p wa -k soft_besclient

## CHEF https://www.chef.io/chef/
-w /etc/chef -p wa -k soft_chef

# High volume events ----------------------------------------------------------

## Remove them if the cause to much volumen in your einvironment

## Root command executions 
-a exit,always -F arch=b64 -F euid=0 -S execve -k rootcmd
-a exit,always -F arch=b32 -F euid=0 -S execve -k rootcmd

## File Deletion Events by User
-a always,exit -F arch=b32 -S rmdir -S unlink -S unlinkat -S rename -S renameat -F auid>=500 -F auid!=4294967295 -k delete
-a always,exit -F arch=b64 -S rmdir -S unlink -S unlinkat -S rename -S renameat -F auid>=500 -F auid!=4294967295 -k delete

## File Access
### Unauthorized Access (unsuccessful)
-a always,exit -F arch=b32 -S creat -S open -S openat -S open_by_handle_at -S truncate -S ftruncate -F exit=-EACCES -F auid>=500 -F auid!=4294967295 -k file_access
-a always,exit -F arch=b32 -S creat -S open -S openat -S open_by_handle_at -S truncate -S ftruncate -F exit=-EPERM -F auid>=500 -F auid!=4294967295 -k file_access
-a always,exit -F arch=b64 -S creat -S open -S openat -S open_by_handle_at -S truncate -S ftruncate -F exit=-EACCES -F auid>=500 -F auid!=4294967295 -k file_access
-a always,exit -F arch=b64 -S creat -S open -S openat -S open_by_handle_at -S truncate -S ftruncate -F exit=-EPERM -F auid>=500 -F auid!=4294967295 -k file_access

### Unsuccessful Creation
-a always,exit -F arch=b32 -S creat,link,mknod,mkdir,symlink,mknodat,linkat,symlinkat -F exit=-EACCES -k file_creation
-a always,exit -F arch=b64 -S mkdir,creat,link,symlink,mknod,mknodat,linkat,symlinkat -F exit=-EACCES -k file_creation
-a always,exit -F arch=b32 -S link,mkdir,symlink,mkdirat -F exit=-EPERM -k file_creation
-a always,exit -F arch=b64 -S mkdir,link,symlink,mkdirat -F exit=-EPERM -k file_creation

### Unsuccessful Modification
-a always,exit -F arch=b32 -S rename -S renameat -S truncate -S chmod -S setxattr -S lsetxattr -S removexattr -S lremovexattr -F exit=-EACCES -k file_modification
-a always,exit -F arch=b64 -S rename -S renameat -S truncate -S chmod -S setxattr -S lsetxattr -S removexattr -S lremovexattr -F exit=-EACCES -k file_modification
-a always,exit -F arch=b32 -S rename -S renameat -S truncate -S chmod -S setxattr -S lsetxattr -S removexattr -S lremovexattr -F exit=-EPERM -k file_modification
-a always,exit -F arch=b64 -S rename -S renameat -S truncate -S chmod -S setxattr -S lsetxattr -S removexattr -S lremovexattr -F exit=-EPERM -k file_modification

# Make the configuration immutable --------------------------------------------
##-e 2

no ideas?

For your first question about why both 32 and 64 architectures have rules its due to the possibility that the architectures have 2 different syscall numbers for the same syscall label. There is more info on that here: (https://www.systutorials.com/docs/linux/man/7-audit.rules/) . The relevant section is:

"Next in the rule would normally be the -S option. This field can either be the syscall name or number. For readability, the name is almost always used. You may give more than one syscall in a rule by specifying another -S option. When sent into the kernel, all syscall fields are put into a mask so that one compare can determine if the syscall is of interest. So, adding multiple syscalls in one rule is very efficient. When you specify a syscall name, auditctl will look up the name and get its syscall number. This leads to some problems on bi-arch machines. The 32 and 64 bit syscall numbers sometimes, but not always, line up. So, to solve this problem, you would generally need to break the rule into 2 with one specifying -F arch=b32 and the other specifying -F arch=b64. This needs to go in front of the -S option so that auditctl looks at the right lookup table when returning the number."

The answer to your second question is the High Volume events audit rules have the potential to cause a large number of events to be written to your audit log. For instance if someone was to run a find | xargs rm in a directory with thousands of files, you would get audit messages for every file. This can mean you end up with more log entries than you can handle which may impact the performance of your machine, or if you have configured auditd to halt on overflow it could lead to the machine crashing to prevent missing an audit message (a common way for attackers to cover their tracks is to overwhelm audit logs with noise so the messages related to their attack have a higher likelihood of being dropped out of the audit buffer).

Thanks u a lot!

Really useful, thanks!
I wonder why you inserted puppet, chef but not ansible.. I think it would be useful.

Hi,

I noticed that the rule -w /etc/sysconfig/network -p wa -k network_modifications is contained twice in this gist. Both on lines 182 and 185.

I forgot to write text. Anyway:
I wanted to say the list for SUSE is incomplete, it is RPM-based and the upper layer uility is 'zypper', but the path to rpm differs.
The below should match.

# Software Management ---------------------------------------------------------

# RPM (Redhat/CentOS)
-w /usr/bin/rpm -p x -k software_mgmt
-w /usr/bin/yum -p x -k software_mgmt

# YAST/Zypper/RPM (SuSE)
-w /sbin/yast -p x -k yast
-w /sbin/yast2 -p x -k yast
-w /bin/rpm -p x -k software_mgmt
-w /usr/bin/zypper -k software_mgmt

# DPKG / APT-GET (Debian/Ubuntu)
-w /usr/bin/dpkg -p x -k software_mgmt
-w /usr/bin/apt-add-repository -p x -k software_mgmt
-w /usr/bin/apt-get -p x -k software_mgmt
-w /usr/bin/aptitude -p x -k software_mgmt

Thanks, I've added the missing lines

I want to monitor /etc/hosts file for modification (attribute , as well as write/execute).
I am using following rule
-w /etc/hosts -p wxa -k files
But for each modify event ausearch is given three records, can we we surpass it to single audit event.

I have used Discretionary Access Control (DAC) modifications, file access rules in centos 7 but I am getting the error.
-F missing operation for auid
Can you please help me on this.

I am trying to use the rules in Oracle Enterprise Linux 6.4 - 64 bit, kernel=2.6.39-400.17.1.el6uek.x86_64 with audit.x86_64 (2.4.5-6.el6) and audit-libs.x86_64 (2.4.5-6.el6). I get the below errors:

Unknown user: chrony
-F unknown field: uid
There was an error in line 85 of /etc/audit/audit.rules
Error sending add rule data request (Rule exists)
There was an error in line 190 of /etc/audit/audit.rules
Error sending add rule data request (Invalid argument)
There was an error in line 325 of /etc/audit/audit.rules

I commented the line #85 - as I do not chrony installed and #190 - is duplicate of #187.

I am unsure of #325. Please guide me.

I suggest the following changes to cover modern distributions:

_# Software Management ---------------------------------------------------------

# RPM/DNF (Redhat/CentOS/Fedora)
-w /usr/bin/rpm -p x -k software_mgmt
-w /usr/bin/yum -p x -k software_mgmt
-w /usr/bin/dnf -p x -k software_mgmt

# YAST/Zypper/RPM (SuSE)
-w /sbin/yast -p x -k yast
-w /sbin/yast2 -p x -k yast
-w /bin/rpm -p x -k software_mgmt
-w /usr/bin/zypper -k software_mgmt

# DPKG/APT (Debian/Ubuntu)
-w /usr/bin/dpkg -p x -k software_mgmt
-w /usr/bin/apt-add-repository -p x -k software_mgmt
-w /usr/bin/apt-get -p x -k software_mgmt
-w /usr/bin/aptitude -p x -k software_mgmt
-w /usr/bin/apt -p x -k software_mgmt_

Hello,

I ran into an issue with auditd after implementing a some of the rules listed here. When I try to install docker yum fails at installing container-selinux-2.74-1 and the system become unresponsive. If I remove the audit rules and go to the defaults the problem goes away. Also if I keep the rules and disable selinux the yum install will work. I looked through the logs and cannot find anything regarding the root cause. I also commented some rules out to determine if it was a specific rule causing the issue but nothing worked. Do you have any advice?

Thanks

As a word of warning:

If you run a high traffic application on x86_64 OS that is not 64bit the 32bit API rule will absolutely bring the server to its knees.

This line can be dangerous

32bit API Exploitation

If you are on a 64 bit platform, everything should be running

in 64 bit mode. This rule will detect any use of the 32 bit syscalls

because this might be a sign of someone exploiting a hole in the 32

bit API.

-a always,exit -F arch=b32 -S all -k 32bit_api

Other than this line which I have now commented out, these rules are amazing.

Thanks!

Thanks a lot!!

Is there any way to monitor an indirect writing, like echo "/path/to/script.py" >> /home/test/.bash_profile , cause -w /home/test/.bash_profile -p wa is not working in that case and monitoring -S open produce a lot of falsepositives. The alternate way I found most flexible is to use AIDE instead.

Please add -w /etc/modprobe.d/ -p wa -k modprobe

Really like this, thank you!

Muy bueno, muchas gracias :D desde CL

El vito también da las gracias

@gcallpa better use the new one https://github.com/Neo23x0/auditd