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clamav-unofficial-sigs.sh
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clamav-unofficial-sigs.sh
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#!/usr/bin/env bash
# shellcheck disable=SC2119
# shellcheck disable=SC2120
# shellcheck disable=SC2128
# shellcheck disable=SC2154
################################################################################
# This is property of eXtremeSHOK.com
# You are free to use, modify and distribute, however you may not remove this notice.
# Copyright (c) Adrian Jon Kriel :: [email protected]
# License: BSD (Berkeley Software Distribution)
################################################################################
#
# Script updates can be found at: https://github.com/extremeshok/clamav-unofficial-sigs
#
# Originially based on Script provided by Bill Landry ([email protected]).
#
################################################################################
#
# THERE ARE NO USER CONFIGURABLE OPTIONS IN THIS SCRIPT
# ALL CONFIGURATION OPTIONS ARE LOCATED IN THE INCLUDED CONFIGURATION FILE
#
################################################################################
###### ####### # # ####### ####### ####### ###### ### #######
# # # # ## # # # # # # # # #
# # # # # # # # # # # # # # #
# # # # # # # # # # ##### # # # #
# # # # # # # # # # # # # # #
# # # # # ## # # # # # # # #
###### ####### # # ####### # ####### ###### ### #
################################################################################
# Detect to make sure the entire script is avilable, fail if the script is missing contents
if [ "$(tail -n 1 "${0}" | head -n 1 | cut -c 1-7)" != "exit \$?" ] ; then
echo "FATAL ERROR: Script is incomplete, please redownload"
exit 1
fi
# Trap the keyboard interrupt (Ctrl + C)
trap xshok_control_c SIGINT
################################################################################
# HELPER FUNCTIONS
################################################################################
# Support user config settings for applying file and directory access permissions.
function perms() {
if [ -n "${clam_user}" ] && [ -n "${clam_group}" ] ; then
"${@:-}"
fi
}
# Prompt a user if they should complete an action with Y or N
# Usage: xshok_prompt_confirm
# if xshok_prompt_confirm ; then
# xshok_prompt_confirm && echo "accepted"
# xshok_prompt_confirm && echo "yes" || echo "no"
# shellcheck disable=SC2120
function xshok_prompt_confirm() { # optional_message
message="${1:-Are you sure?}"
while true; do
read -r -p "${message} [y/N]" response < /dev/tty
case "${response}" in
[yY]) return 0 ;;
[nN]) return 1 ;;
*) printf " \\033[31m %s \\n\\033[0m" "invalid input"
esac
done
}
# Create a pid file
function xshok_create_pid_file() { # pid.file
if [ "${1}" ] ; then
pidfile="${1}"
if ! echo $$ > "${pidfile}" ; then
xshok_pretty_echo_and_log "ERROR: Could not create PID file: ${pidfile}"
exit 1
fi
else
xshok_pretty_echo_and_log "ERROR: Missing value for option"
exit 1
fi
}
# Intercept ctrl+c and calls the cleanup function
function xshok_control_c() {
echo
xshok_pretty_echo_and_log "--------------| Exiting ... Please wait |--------------" "-"
xshok_cleanup
exit $?
}
# Cleanup function
function xshok_cleanup() {
# Wait for all processes to end
wait
xshok_pretty_echo_and_log " Powered By https://eXtremeSHOK.com " "#"
return $?
}
# Check if the current running user is the root user, otherwise return false
function xshok_is_root() {
if [ "$(uname -s)" == "SunOS" ] ; then
id_bin="/usr/xpg4/bin/id"
else
id_bin="$(command -v id 2> /dev/null)"
fi
if [ "$($id_bin -u)" == 0 ] ; then
return 0
else
return 1 # Not root
fi
}
# Check if its a file, otherwise return false
function xshok_is_file() { # filepath
filepath="${1}"
if [ -f "${filepath}" ] ; then
return 0 ;
else
return 1 ; # Not a file
fi
}
# Check if filepath is a subdir, otherwise return false
# Usage: xshok_is_subdir "filepath"
# xshok_is_subdir "/root/" - false
# xshok_is_subdir "/usr/local/etc" && echo "yes" - yes
function xshok_is_subdir() { # filepath
shopt -s extglob; filepath="${filepath%%+(/)}"
if [ -d "$filepath" ] ; then
res="${filepath//[^\/]}"
if [ "${#res}" -gt 1 ] ; then
return 0 ;
else
return 1 ; # Not a subdir
fi
else
return 1 ; # Not a dir
fi
}
# Create a dir and set the ownership
function xshok_mkdir_ownership() { # path
if [ "${1}" ] ; then
if ! mkdir -p "${1}" 2>/dev/null ; then
xshok_pretty_echo_and_log "ERROR: Could not create directory: ${1}"
exit 1
fi
perms chown -f "${clam_user}:${clam_group}" "${1}" > /dev/null 2>&1
else
xshok_pretty_echo_and_log "ERROR: Missing value for option"
exit 1
fi
}
# Check if a user and group exists on the system otherwise return false
# Usage:
# xshok_is_subdir "username" && echo "user found" || echo "no"
# xshok_is_subdir "username" "groupname" && echo "user and group found" || echo "no"
function xshok_user_group_exists() { # username groupname
if [ "$(uname -s)" == "SunOS" ] ; then
id_bin="/usr/xpg4/bin/id"
else
id_bin="$(command -v id 2> /dev/null)"
fi
if [ "${2}" ] ; then
if [ "$(uname -s)" == "Darwin" ] ; then
#use ruby, as this is the best way. Ruby is always avilable as brew uses ruby
ruby -e 'require "etc"; puts Etc::getgrnam("_clamav").gid' > /dev/null 2>&1
ret="$?"
else
getent_bin="$(command -v getent 2> /dev/null)"
$getent_bin group "${2}" >/dev/null 2>&1
ret="$?"
fi
fi
if [ "${1}" ] ; then
if $id_bin -u "${1}" > /dev/null 2>&1 ; then
if [ "${2}" ] ; then
if [ "$ret" -eq 0 ] ; then
return 0 ; # User and group exists
else
return 1 ; # Group does NOT exist
fi
else
return 0 ; # User exists
fi
else
return 1 ; # User does NOT exist
fi
else
xshok_pretty_echo_and_log "ERROR: Missing value for option"
exit 1
fi
}
# Handle comments with/out borders and logging.
# Usage:
# pretty_echo_and_log "one"
# one
# pretty_echo_and_log "two" "-"
# ---
# two
# ---
# pretty_echo_and_log "three" "=" "8"
# ========
# three
# ========
# pretty_echo_and_log "" "/\" "7"
# /\/\/\/\/\/\
# type: e = error, w= warning, a = alert, n = notice
# will auto detect using the first word "error,warning,alert,notice"
# type e will make a == border
# type w will make a -- border
# type a will make a ** border
# type n will make a ++ border
function xshok_pretty_echo_and_log() { # "string" "repeating" "count" "type"
#detect if running under cron and silence
mystring="$1"
myrepeating="$2"
mycount="$3"
mytype="$4"
if [ "$comment_silence" != "yes" ] && [ "$force_verbose" != "yes" ]; then
if [ ! -t 1 ] ; then
comment_silence="yes"
fi
fi
# always show errors and alerts
if [ -z "$mytype" ] ; then
shopt -s nocasematch
if [[ "$mystring" =~ "ERROR:" ]] || [[ "$mystring" =~ "ERROR " ]] ; then
mytype="e"
elif [[ "$mystring" =~ "WARNING:" ]] || [[ "$mystring" =~ "WARNING " ]] ; then
mytype="w"
elif [[ "$mystring" =~ "ALERT:" ]] || [[ "$mystring" =~ "ALERT " ]] ; then
mytype="a"
elif [[ "$mystring" =~ "NOTICE:" ]] || [[ "$mystring" =~ "NOTICE " ]] ; then
mytype="n"
fi
fi
if [ "$mytype" == "e" ] || [ "$mytype" == "a" ] ; then
comment_silence="no"
fi
# Handle comments is not silenced or type
if [ "$comment_silence" != "yes" ] ; then
if [ -z "$myrepeating" ] ; then
if [ "$mytype" == "e" ] ; then
myrepeating="="
elif [ "$mytype" == "w" ] ; then
myrepeating="-"
elif [ "$mytype" == "a" ] ; then
myrepeating="*"
elif [ "$mytype" == "n" ] ; then
myrepeating="+"
fi
fi
if [ -z "$myrepeating" ] ; then
echo "${mystring}"
else
myvar=""
if [ -z "$mycount" ] ; then
mycount="${#mystring}"
fi
for (( n = 0; n < mycount; n++ )) ; do
myvar="${myvar}${myrepeating}"
done
if [ -n "${mystring}" ] ; then
echo -e "${myvar}\\n${1}\\n${myvar}"
else
echo -e "${myvar}"
fi
fi
fi
# Handle logging
if [ "$enable_log" == "yes" ] ; then
if [ ! -z "$log_pipe_cmd" ] ; then
echo "${1}" | $log_pipe_cmd
else
if [ ! -e "${log_file_path}/${log_file_name}" ] ; then
# xshok_mkdir_ownership "$log_file_path"
mkdir -p "$log_file_path"
touch "${log_file_path}/${log_file_name}" 2>/dev/null
perms chown -f "${clam_user}:${clam_group}" "${log_file_path}/${log_file_name}"
fi
if [ ! -w "${log_file_path}/${log_file_name}" ] ; then
echo "WARNING: Logging Disabled, as file not writable: ${log_file_path}/${log_file_name}"
enable_log="no"
else
echo "$(date "+%b %d %T")" "${1}" >> "${log_file_path}/${log_file_name}"
fi
fi
fi
}
# Check if the $2 value is not null and does not start with -
function xshok_check_s2() { # value1 value2
if [ "${1}" ] ; then
if [[ "${1}" =~ ^-.* ]] ; then
xshok_pretty_echo_and_log "ERROR: Missing value for option or value begins with -"
exit 1
fi
else
xshok_pretty_echo_and_log "ERROR: Missing value for option"
exit 1
fi
}
# Time remaining information function
function xshok_draw_time_remaining() { #time_remaining #update_hours #name
if [ "${1}" ] && [ "${2}" ] ; then
time_remaining="${1}"
hours_left="$((time_remaining / 3600))"
minutes_left="$((time_remaining % 3600 / 60))"
xshok_pretty_echo_and_log "${2} hours have not yet elapsed since the last ${3} update check"
xshok_pretty_echo_and_log "No update check was performed at this time" "-"
xshok_pretty_echo_and_log "Next check will be performed in approximately ${hours_left} hour(s), ${minutes_left} minute(s)"
fi
}
# Download function
function xshok_file_download() { #outputfile #url #notimestamp
if [ "${1}" ] && [ "${2}" ] ; then
if [ -n "$curl_bin" ] ; then
if [ -f "${1}" ] ; then
# shellcheck disable=SC2086
$curl_bin --fail --compressed $curl_proxy $curl_insecure $curl_output_level --connect-timeout "${downloader_connect_timeout}" --remote-time --location --retry "${downloader_tries}" --max-time "${downloader_max_time}" --time-cond "${1}" --output "${1}" "${2}"
result=$?
else
# shellcheck disable=SC2086
$curl_bin --fail --compressed $curl_proxy $curl_insecure $curl_output_level --connect-timeout "${downloader_connect_timeout}" --remote-time --location --retry "${downloader_tries}" --max-time "${downloader_max_time}" --output "${1}" "${2}"
result=$?
fi
else
if [ ! "${3}" ] ; then
# the following is required because wget, cannot do --timestamping and --output-document together
this_dir="$PWD"
output_file="$1"
url="$2"
output_dir="${output_file%/*}"
output_file="${output_file##*/}"
url_file="${url##*/}"
wget_output_link=""
cd "${output_dir}" || exit
if [ "$output_file" != "$url_file" ] ; then
if [ ! -f "$url_file" ] ; then
if [ ! -f "$output_file" ] ; then
touch "$output_file"
fi
ln -s "$output_file" "$url_file"
wget_output_link="$url_file"
fi
fi
# shellcheck disable=SC2086
$wget_bin $wget_compression $wget_proxy $wget_insecure $wget_output_level --connect-timeout="${downloader_connect_timeout}" --random-wait --tries="${downloader_tries}" --timeout="${downloader_max_time}" --timestamping "${2}"
result=$?
if [ ! -n "$wget_output_link" ] ; then
if [ -L "$wget_output_link" ] ; then
rm -f "$wget_output_link"
fi
fi
cd "$this_dir" || exit
else
# shellcheck disable=SC2086
$wget_bin $wget_compression $wget_proxy $wget_insecure $wget_output_level --connect-timeout="${downloader_connect_timeout}" --random-wait --tries="${downloader_tries}" --timeout="${downloader_max_time}" --output-document="${1}" "${2}"
result=$?
fi
fi
return $result
fi
}
# Handle list of database files
function clamav_files() {
echo "${clam_dbs}/${db}" >> "${current_tmp}"
if [ "$keep_db_backup" == "yes" ] ; then
echo "${clam_dbs}/${db}-bak" >> "${current_tmp}"
fi
}
# Manage the databases and allow multi-dimensions as well as global overrides
# Since the datbases are basically a multi-dimentional associative arrays in bash
# ratings: LOW | MEDIUM | HIGH | REQUIRED | LOWONLY | MEDIUMONLY | LOWMEDIUMONLY | MEDIUMHIGHONLY | HIGHONLY | DISABLED
function xshok_database() { # rating database_array
# Assign
current_rating="${1}"
declare -a current_dbs=( "${@:2}" )
# Zero
declare -a new_dbs=( )
if [ -n "${current_dbs[0]}" ] ; then
if [ ${#current_dbs} -ge 1 ] ; then
for db_name in "${current_dbs[@]}" ; do
# Checks
if [ "$enable_yararules" == "no" ] ; then # YARA rules are disabled
if [[ "$db_name" == *".yar"* ]] ; then # If it's the value you want to delete
continue # Skip to the next value
fi
fi
if [ -z "$current_rating" ] ; then # YARA rules are disabled
new_dbs+=( "$db_name" )
else
if [[ ! "$db_name" = *"|"* ]] ; then # This old format
new_dbs+=( "$db_name" )
else
db_name_rating="${db_name#*|}"
db_name="${db_name%|*}"
if [ "$db_name_rating" != "DISABLED" ] ; then
if [ "$db_name_rating" == "$current_rating" ] ; then
new_dbs+=( "$db_name" )
elif [ "$db_name_rating" == "REQUIRED" ] ; then
new_dbs+=( "$db_name" )
elif [ "$current_rating" == "LOW" ] ; then
if [ "$db_name_rating" == "LOWONLY" ] || [ "$db_name_rating" == "LOW" ] || [ "$db_name_rating" == "LOWMEDIUMONLY" ] ; then
new_dbs+=( "$db_name" )
fi
elif [ "$current_rating" == "MEDIUM" ] ; then
if [ "$db_name_rating" == "MEDIUMONLY" ] || [ "$db_name_rating" == "MEDIUM" ] || [ "$db_name_rating" == "LOW" ] || [ "$db_name_rating" == "LOWMEDIUMONLY" ] || [ "$db_name_rating" == "MEDIUMHIGHONLY" ] ; then
new_dbs+=( "$db_name" )
fi
elif [ "$current_rating" == "HIGH" ] ; then
if [ "$db_name_rating" == "HIGHONLY" ] || [ "$db_name_rating" == "HIGH" ] || [ "$db_name_rating" == "MEDIUM" ] || [ "$db_name_rating" == "LOW" ] || [ "$db_name_rating" == "MEDIUMHIGHONLY" ] ; then
new_dbs+=( "$db_name" )
fi
elif [ "$current_rating" == "LOWONLY" ] ; then
if [ "$db_name_rating" == "LOWONLY" ] || [ "$db_name_rating" == "LOW" ] ; then
new_dbs+=( "$db_name" )
fi
elif [ "$current_rating" == "MEDIUMONLY" ] ; then
if [ "$db_name_rating" == "MEDIUMONLY" ] || [ "$db_name_rating" == "MEDIUM" ] ; then
new_dbs+=( "$db_name" )
fi
elif [ "$current_rating" == "LOWMEDIUMONLY" ] ; then
if [ "$db_name_rating" == "LOWMEDIUMONLY" ] || [ "$db_name_rating" == "LOW" ] || [ "$db_name_rating" == "MEDIUM" ] ; then
new_dbs+=( "$db_name" )
fi
elif [ "$current_rating" == "MEDIUMHIGHONLY" ] ; then
if [ "$db_name_rating" == "MEDIUMHIGHONLY" ] || [ "$db_name_rating" == "MEDIUM" ] || [ "$db_name_rating" == "HIGH" ] ; then
new_dbs+=( "$db_name" )
fi
elif [ "$current_rating" == "HIGHONLY" ] ; then
if [ "$db_name_rating" == "HIGHONLY" ] || [ "$db_name_rating" == "HIGH" ] ; then
new_dbs+=( "$db_name" )
fi
fi
fi
fi
fi
done
fi
fi
echo "${new_dbs[@]}" | xargs # Remove extra whitespace
}
################################################################################
# ADDITIONAL PROGRAM FUNCTIONS
################################################################################
# Generates a man config and installs it
function install_man() {
if [ -n "$pkg_mgr" ] || [ -n "$pkg_rm" ] ; then
xshok_pretty_echo_and_log "This script (clamav-unofficial-sigs) was installed on the system via ${pkg_mgr}"
exit 1
fi
xshok_pretty_echo_and_log ""
xshok_pretty_echo_and_log "Generating man file for install...."
# Use defined varibles or attempt to use default varibles
if [ ! -e "${man_dir}/${man_filename}" ] ; then
mkdir -p "$man_dir"
touch "${man_dir}/${man_filename}" 2>/dev/null
fi
if [ ! -w "${man_dir}/${man_filename}" ] ; then
xshok_pretty_echo_and_log "ERROR: man install aborted, as file not writable: ${man_dir}/${man_filename}"
else
BOLD="\\fB"
#REV=""
NORM="\\fR"
manresult="$(help_and_usage "man")"
# Our template..
cat << EOF > "${man_dir}/${man_filename}"
.\\" Manual page for eXtremeSHOK.com ClamAV Unofficial Signature Updater
.TH clamav-unofficial-sigs 8 "${script_version_date}" "Version: ${script_version}" "SCRIPT COMMANDS"
.SH NAME
clamav-unofficial-sigs \\- Download, test, and install third-party ClamAV signature databases.
.SH SYNOPSIS
.B clamav-unofficial-sigs
.RI [ options ]
.SH DESCRIPTION
\\fBclamav-unofficial-sigs\\fP provides a simple way to download, test, and update third-party signature databases provided by Sanesecurity, FOXHOLE, OITC, Scamnailer, BOFHLAND, CRDF, Porcupine, Securiteinfo, MalwarePatrol, Yara-Rules Project, etc. It will also generate and install cron, logrotate, and man files.
.SH UPDATES
Script updates can be found at: \\fBhttps://github.com/extremeshok/clamav-unofficial-sigs\\fP
.SH OPTIONS
This script follows the standard GNU command line syntax.
.LP
$manresult
.SH SEE ALSO
.BR clamd (8),
.BR clamscan (1)
.SH COPYRIGHT
Copyright (c) Adrian Jon Kriel :: [email protected]
.TP
You are free to use, modify and distribute, however you may not remove this notice.
.SH LICENSE
BSD (Berkeley Software Distribution)
.SH BUGS
Report bugs to \\fBhttps://github.com/extremeshok/clamav-unofficial-sigs\\fP
.SH AUTHOR
Adrian Jon Kriel :: [email protected]
Originially based on Script provide by Bill Landry
EOF
fi
xshok_pretty_echo_and_log "Completed: man installed, as file: ${man_dir}/${man_filename}"
}
# Generate a logrotate config and install it
function install_logrotate() {
if [ -n "$pkg_mgr" ] || [ -n "$pkg_rm" ] ; then
xshok_pretty_echo_and_log "This script (clamav-unofficial-sigs) was installed on the system via ${pkg_mgr}"
exit 1
fi
xshok_pretty_echo_and_log ""
xshok_pretty_echo_and_log "Generating logrotate file for install...."
# Use defined varibles or attempt to use default varibles
if [ -z "$logrotate_user" ] ; then
logrotate_user="${clam_user}";
fi
if [ -z "$logrotate_group" ] ; then
logrotate_group="${clam_group}";
fi
if [ -z "$logrotate_log_file_full_path" ] ; then
logrotate_log_file_full_path="${log_file_path}/${log_file_name}"
fi
if [ ! -e "${logrotate_dir}/${logrotate_filename}" ] ; then
mkdir -p "$logrotate_dir"
touch "${logrotate_dir}/${logrotate_filename}" 2>/dev/null
fi
if [ ! -w "${logrotate_dir}/${logrotate_filename}" ] ; then
xshok_pretty_echo_and_log "ERROR: logrotate install aborted, as file not writable: ${logrotate_dir}/${logrotate_filename}"
else
# Our template..
cat << EOF > "${logrotate_dir}/${logrotate_filename}"
# https://eXtremeSHOK.com ######################################################
# This file contains the logrotate settings for clamav-unofficial-sigs.sh
###################
# This is property of eXtremeSHOK.com
# You are free to use, modify and distribute, however you may not remove this notice.
# Copyright (c) Adrian Jon Kriel :: [email protected]
##################
#
# Script updates can be found at: https://github.com/extremeshok/clamav-unofficial-sigs
#
# Originially based on:
# Script provide by Bill Landry ([email protected]).
#
# License: BSD (Berkeley Software Distribution)
#
##################
# Automatically Generated: $(date)
##################
#
# This logrotate file will rotate the logs generated by the clamav-unofficial-sigs.sh
#
# To Adjust the logrotate values, edit your configs and run
# bash clamav-unofficial-sigs.sh --install-logrotate to generate a new file.
$logrotate_log_file_full_path {
weekly
rotate 4
missingok
notifempty
compress
create 0640 ${logrotate_user} ${logrotate_group}
}
EOF
fi
xshok_pretty_echo_and_log "Completed: logrotate installed, as file: ${logrotate_dir}/${logrotate_filename}"
}
# Generate a cron config and install it
function install_cron() {
if [ -n "$pkg_mgr" ] || [ -n "$pkg_rm" ] ; then
xshok_pretty_echo_and_log "This script (clamav-unofficial-sigs) was installed on the system via {$pkg_mgr}"
exit 1
fi
xshok_pretty_echo_and_log ""
xshok_pretty_echo_and_log "Generating cron file for install...."
# Use defined varibles or attempt to use default varibles
if [ -z "$cron_minute" ] ; then
cron_minute="$(( ( RANDOM % 59 ) + 1 ))"
fi
if [ -z "$cron_user" ] ; then
cron_user="${clam_user}";
fi
if [ -z "$cron_bash" ] ; then
cron_bash="$(command -v bash 2> /dev/null)"
fi
if [ -z "$cron_script_full_path" ] ; then
cron_script_full_path="$this_script_full_path"
fi
if [ "$cron_sudo" == "yes" ] ; then
cron_sudo="sudo -u"
fi
if [ ! -e "${cron_dir}/${cron_filename}" ] ; then
mkdir -p "$cron_dir"
touch "${cron_dir}/${cron_filename}" 2>/dev/null
fi
if [ ! -w "${cron_dir}/${cron_filename}" ] ; then
xshok_pretty_echo_and_log "ERROR: cron install aborted, as file not writable: ${cron_dir}/${cron_filename}"
else
# Our template..
cat << EOF > "${cron_dir}/${cron_filename}"
# https://eXtremeSHOK.com ######################################################
# This file contains the cron settings for clamav-unofficial-sigs.sh
###################
# This is property of eXtremeSHOK.com
# You are free to use, modify and distribute, however you may not remove this notice.
# Copyright (c) Adrian Jon Kriel :: [email protected]
##################
#
# Script updates can be found at: https://github.com/extremeshok/clamav-unofficial-sigs
#
# Originially based on:
# Script provide by Bill Landry ([email protected]).
#
# License: BSD (Berkeley Software Distribution)
#
##################
# Automatically Generated: $(date)
##################
#
# This cron file will execute the clamav-unofficial-sigs.sh script that
# currently supports updating third-party signature databases provided
# by Sanesecurity, SecuriteInfo, MalwarePatrol, OITC, etc.
#
# The script is set to run hourly, at a random minute past the hour, and the
# script itself is set to randomize the actual execution time between
# 60 - 600 seconds. To Adjust the cron values, edit your configs and run
# bash clamav-unofficial-sigs.sh --install-cron to generate a new file.
MAILTO=root
$cron_minute * * * * ${cron_sudo} ${cron_user} [ -x ${cron_script_full_path} ] && ${cron_bash} ${cron_script_full_path}
# https://eXtremeSHOK.com ######################################################
EOF
fi
xshok_pretty_echo_and_log "Completed: cron installed, as file: ${cron_dir}/${cron_filename}"
}
# Auto upgrade the master.conf and the
function xshok_upgrade() {
allow_upgrades="yes"
if [ "$allow_upgrades" == "no" ] ; then
xshok_pretty_echo_and_log "ERROR: --upgrade has been disabled, allow_upgrades=no"
exit 1
fi
if ! xshok_is_root ; then
xshok_pretty_echo_and_log "ERROR: Only root can run the upgrade"
exit 1
fi
xshok_pretty_echo_and_log "Checking for updates ..."
found_upgrade="no"
if [ -n "$curl_bin" ] ; then
# shellcheck disable=SC2086
latest_version="$($curl_bin --compressed $curl_proxy $curl_insecure $curl_output_level --connect-timeout "${downloader_connect_timeout}" --remote-time --location --retry "${downloader_tries}" --max-time "${downloader_max_time}" "https://raw.githubusercontent.com/extremeshok/clamav-unofficial-sigs/${git_branch}/clamav-unofficial-sigs.sh" 2> /dev/null | $grep_bin "^script_version=" | head -n1 | cut -d '"' -f 2)"
# shellcheck disable=SC2086
latest_config_version="$($curl_bin --compressed $curl_proxy $curl_insecure $curl_output_level --connect-timeout "${downloader_connect_timeout}" --remote-time --location --retry "${downloader_tries}" --max-time "${downloader_max_time}" "https://raw.githubusercontent.com/extremeshok/clamav-unofficial-sigs/${git_branch}/config/master.conf" 2> /dev/null | $grep_bin "^config_version=" | head -n1 | cut -d '"' -f 2)"
else
# shellcheck disable=SC2086
latest_version="$($wget_bin $wget_compression $wget_proxy $wget_insecure $wget_output_level --connect-timeout="${downloader_connect_timeout}" --random-wait --tries="${downloader_tries}" --timeout="${downloader_max_time}" "https://raw.githubusercontent.com/extremeshok/clamav-unofficial-sigs/${git_branch}/clamav-unofficial-sigs.sh" -O - 2> /dev/null | $grep_bin "^script_version=" | head -n1 | cut -d '"' -f 2)"
# shellcheck disable=SC2086
latest_config_version="$($wget_bin $wget_compression $wget_proxy $wget_insecure $wget_output_level --connect-timeout="${downloader_connect_timeout}" --random-wait --tries="${downloader_tries}" --timeout="${downloader_max_time}" "https://raw.githubusercontent.com/extremeshok/clamav-unofficial-sigs/${git_branch}/config/master.conf" -O - 2> /dev/null | $grep_bin "^config_version=" | head -n1 | cut -d '"' -f 2)"
fi
# config_dir/master.conf
if [ "$latest_config_version" ] ; then
# shellcheck disable=SC2183,SC2086
if [ "$(printf "%02d%02d%02d%02d" ${latest_config_version//./ })" -gt "$(printf "%02d%02d%02d%02d" ${config_version//./ })" ] ; then
found_upgrade="yes"
xshok_pretty_echo_and_log "ALERT: Upgrading config from v${config_version} to v${latest_config_version}"
if [ -w "${config_dir}/master.conf" ] && [ -f "${config_dir}/master.conf" ] ; then
echo "Downloading https://raw.githubusercontent.com/extremeshok/clamav-unofficial-sigs/${git_branch}/config/master.conf"
xshok_file_download "${work_dir}/master.conf.tmp" "https://raw.githubusercontent.com/extremeshok/clamav-unofficial-sigs/${git_branch}/config/master.conf" "notimestamp"
ret="$?"
if [ "$ret" -ne 0 ] ; then
xshok_pretty_echo_and_log "ERROR: Could not download https://raw.githubusercontent.com/extremeshok/clamav-unofficial-sigs/${git_branch}/config/master.conf"
exit 1
fi
if ! $grep_bin -m 1 "config_version" "${work_dir}/master.conf.tmp" > /dev/null 2>&1 ; then
echo "ERROR: Downloaded master.conf is incomplete, please re-run"
exit 1
fi
# Copy over permissions from old version
OCTAL_MODE="$(stat -c "%a" "${config_dir}/master.conf")"
xshok_pretty_echo_and_log "Running update process"
if ! mv -f "${work_dir}/master.conf.tmp" "${config_dir}/master.conf" ; then
xshok_pretty_echo_and_log "ERROR: failed moving ${work_dir}/master.conf.tmp to ${config_dir}/master.conf"
exit 1
fi
if ! chmod "$OCTAL_MODE" "${config_dir}/master.conf" ; then
xshok_pretty_echo_and_log "ERROR: unable to set permissions on ${config_dir}/master.conf"
exit 1
fi
xshok_pretty_echo_and_log "Completed"
else
xshok_pretty_echo_and_log "ERROR: ${config_dir}/master.conf is not a file or is not writable"
exit 1
fi
fi
fi
if [ "$latest_version" ] ; then
# shellcheck disable=SC2183,SC2086
if [ "$(printf "%02d%02d%02d%02d" ${latest_version//./ })" -gt "$(printf "%02d%02d%02d%02d" ${script_version//./ })" ] ; then
found_upgrade="yes"
xshok_pretty_echo_and_log "ALERT: Upgrading script from v${script_version} to v${latest_version}"
if [ -w "${config_dir}/master.conf" ] && [ -f "${config_dir}/master.conf" ] ; then
echo "Downloading https://raw.githubusercontent.com/extremeshok/clamav-unofficial-sigs/${git_branch}/clamav-unofficial-sigs.sh"
xshok_file_download "${work_dir}/clamav-unofficial-sigs.sh.tmp" "https://raw.githubusercontent.com/extremeshok/clamav-unofficial-sigs/${git_branch}/clamav-unofficial-sigs.sh" "notimestamp"
ret=$?
if [ "$ret" -ne 0 ] ; then
xshok_pretty_echo_and_log "ERROR: Could not download https://raw.githubusercontent.com/extremeshok/clamav-unofficial-sigs/${git_branch}/clamav-unofficial-sigs.sh"
exit 1
fi
# Detect to make sure the entire script is avilable, fail if the script is missing contents
if [ "$(tail -n 1 "${work_dir}/clamav-unofficial-sigs.sh.tmp" | head -n 1 | cut -c 1-7)" != "exit \$?" ] ; then
echo "ERROR: Downloaded clamav-unofficial-sigs.sh is incomplete, please re-run"
exit 1
fi
# Copy over permissions from old version
OCTAL_MODE="$(stat -c "%a" "${this_script_full_path}")"
xshok_pretty_echo_and_log "Inserting update process..."
# Generate the update script
cat > "${work_dir}/xshok_update_script.sh" << EOF
#!/usr/bin/env bash
echo "Running update process"
# Overwrite old file with new
if ! mv -f "${work_dir}/clamav-unofficial-sigs.sh.tmp" "${this_script_full_path}" ; then
echo "ERROR: failed moving ${work_dir}/clamav-unofficial-sigs.sh.tmp to ${this_script_full_path}"
rm -f \$0
exit 1
fi
if ! chmod "$OCTAL_MODE" "${this_script_full_path}" ; then
echo "ERROR: unable to set permissions on ${this_script_full_path}"
rm -f \$0
exit 1
fi
echo "Completed"
# echo "----------------------"
# echo "Optional, run as root: "
# echo "clamav-unofficial-sigs.sh --install-all"
echo "----------------------"
echo "Run once as root: "
echo "clamav-unofficial-sigs.sh --force"
#remove the tmp script before exit
rm -f \$0
EOF
# Replaced with $0, so code will update and then call itself with the same parameters it had
#exec "${0}" "$@"
bash_bin="$(command -v bash 2> /dev/null)"
exec "$bash_bin" "${work_dir}/xshok_update_script.sh"
echo "Running once as root"
else
xshok_pretty_echo_and_log "ERROR: ${config_dir}/master.conf is not a file or is not writable"
exit 1
fi
fi
fi
if [ "$found_upgrade" == "no" ] ; then
xshok_pretty_echo_and_log "No updates available"
fi
}
# Decode a third-party signature either by signature name
function decode_third_party_signature_by_signature_name() {
xshok_pretty_echo_and_log ""
xshok_pretty_echo_and_log "Input a third-party signature name to decode (e.g: Sanesecurity.Junk.15248) or"
xshok_pretty_echo_and_log "a hexadecimal encoded data string and press enter:"
read -r input
# Remove quotes and .UNOFFICIAL from the whitelist input string
input="$(echo "${input}" | tr -d "'" | tr -d '"' | tr -d '`')"
input=${input/\.UNOFFICIAL/}
if echo "${input}" | $grep_bin "\\." > /dev/null ; then
cd "$clam_dbs" || exit
sig="$($grep_bin "${input}:" ./*.ndb)"
if [ -n "$sig" ] ; then
db_file="${sig%:*}"
xshok_pretty_echo_and_log "${input} found in: ${db_file}"
xshok_pretty_echo_and_log "${input} signature decodes to:"
xshok_pretty_echo_and_log "$sig" | cut -d ":" -f 5 | perl -pe 's/([a-fA-F0-9]{2})|(\{[^}]*\}|\([^)]*\))/defined $2 ? $2 : chr(hex $1)/eg'
else
xshok_pretty_echo_and_log "Signature ${input} could not be found."
xshok_pretty_echo_and_log "This script will only decode ClamAV 'UNOFFICIAL' third-Party,"
xshok_pretty_echo_and_log "non-image based, signatures as found in the *.ndb databases."
fi
else
xshok_pretty_echo_and_log "Here is the decoded hexadecimal input string:"
echo "${input}" | perl -pe 's/([a-fA-F0-9]{2})|(\{[^}]*\}|\([^)]*\))/defined $2 ? $2 : chr(hex $1)/eg'
fi
}
# Hexadecimal encode an entire input string
function hexadecimal_encode_entire_input_string() {
xshok_pretty_echo_and_log ""
xshok_pretty_echo_and_log "Input the data string that you want to hexadecimal encode and then press enter. Do not include"
xshok_pretty_echo_and_log "any quotes around the string unless you want them included in the hexadecimal encoded output:"
read -r input
xshok_pretty_echo_and_log "Here is the hexadecimal encoded input string:"
echo "${input}" | perl -pe 's/(.)/sprintf("%02lx", ord $1)/eg'
}
# Hexadecimal encode a formatted input string
function hexadecimal_encode_formatted_input_string() {
xshok_pretty_echo_and_log ""
xshok_pretty_echo_and_log "Input a formated data string containing spacing fields '{}, (), *' that you want to hexadecimal"
xshok_pretty_echo_and_log "encode, without encoding the spacing fields, and then press enter. Do not include any quotes"
xshok_pretty_echo_and_log "around the string unless you want them included in the hexadecimal encoded output:"
read -r input
xshok_pretty_echo_and_log "Here is the hexadecimal encoded input string:"
echo "${input}" | perl -pe 's/(\{[^}]*\}|\([^)]*\)|\*)|(.)/defined $1 ? $1 : sprintf("%02lx", ord $2)/eg'
}
# GPG verify a specific Sanesecurity database file
function gpg_verify_specific_sanesecurity_database_file() { # databasefile
xshok_pretty_echo_and_log ""
if [ "$enable_gpg" == "no" ] ; then
xshok_pretty_echo_and_log "GnuPG / signature verification disabled" "-"
else
if [ "${1}" ] ; then
db_file="$(echo "${1}" | awk -F "/" '{print $NF}')"
if [ -r "${work_dir_sanesecurity}/${db_file}" ] ; then
xshok_pretty_echo_and_log "GPG signature testing database file: ${work_dir_sanesecurity}/${db_file}"
if [ -r "${work_dir_sanesecurity}/${db_file}.sig" ] ; then
if ! "$gpg_bin" -q --trust-model always --no-default-keyring --homedir "${work_dir_gpg}" --keyring "${work_dir_gpg}/ss-keyring.gpg" --verify "${work_dir_sanesecurity}/${db_file}.sig" "${work_dir_sanesecurity}/${db_file}" ; then
if "$gpg_bin" -q --always-trust --no-default-keyring --homedir "${work_dir_gpg}" --keyring "${work_dir_gpg}/ss-keyring.gpg" --verify "${work_dir_sanesecurity}/${db_file}.sig" "${work_dir_sanesecurity}/${db_file}" ; then
exit 0
else
exit 1
fi
else
exit 0
fi
else
xshok_pretty_echo_and_log "Signature ${db_file}.sig cannot be found."
fi
else
xshok_pretty_echo_and_log "File ${db_file} cannot be found or is not a Sanesecurity database file."
xshok_pretty_echo_and_log "Only the following Sanesecurity and OITC databases can be GPG signature tested:"
ls --ignore "*.sig" --ignore "*.md5" --ignore "*.ign2" "${work_dir_sanesecurity}"
fi
else
xshok_pretty_echo_and_log "ERROR: Missing value for option"
exit 1
fi
exit 1
fi
}
# Output system and configuration information
function output_system_configuration_information() {
xshok_pretty_echo_and_log ""
xshok_pretty_echo_and_log "*** SCRIPT INFORMATION ***"
xshok_pretty_echo_and_log "${this_script_name} ${script_version} (${script_version_date})"
xshok_pretty_echo_and_log "Master.conf Version: ${config_version}"
xshok_pretty_echo_and_log "Minimum required config: ${minimum_required_config_version}"
xshok_pretty_echo_and_log "*** SYSTEM INFORMATION ***"
$uname_bin -a
xshok_pretty_echo_and_log "*** CLAMSCAN LOCATION & VERSION ***"
xshok_pretty_echo_and_log "${clamscan_bin}"
$clamscan_bin --version | head -1
xshok_pretty_echo_and_log "*** RSYNC LOCATION & VERSION ***"
xshok_pretty_echo_and_log "${rsync_bin}"
$rsync_bin --version | head -1
if [ -n "$curl_bin" ] ; then
xshok_pretty_echo_and_log "*** CURL LOCATION & VERSION ***"
xshok_pretty_echo_and_log "${curl_bin}"
$curl_bin --version | head -1
else
xshok_pretty_echo_and_log "*** WGET LOCATION & VERSION ***"
xshok_pretty_echo_and_log "${wget_bin}"
$wget_bin --version | head -1
fi
if [ "$enable_gpg" == "yes" ] ; then
xshok_pretty_echo_and_log "*** GPG LOCATION & VERSION ***"
xshok_pretty_echo_and_log "${gpg_bin}"
$gpg_bin --version | head -1
fi
xshok_pretty_echo_and_log "*** DIRECTORY INFORMATION ***"
xshok_pretty_echo_and_log "Working Directory: ${work_dir}"
xshok_pretty_echo_and_log "Clam Database Directory: ${clam_dbs}"
if [ "$custom_config" != "no" ] ; then
if [ -d "$custom_config" ] ; then
# Assign the custom config dir and remove trailing / (removes / and //)
xshok_pretty_echo_and_log "Custom Configuration Directory: ${custom_config}"
else
xshok_pretty_echo_and_log "Custom Configuration File: ${custom_config}"
fi
else
xshok_pretty_echo_and_log "Configuration Directory: ${config_dir}"
fi
xshok_pretty_echo_and_log ""
}
# Make a signature database from an ascii file
function make_signature_database_from_ascii_file() {
xshok_pretty_echo_and_log ""
echo "
The '-m' script flag provides a way to create a ClamAV hexadecimal signature database (*.ndb) file
from a list of data strings stored in a clear-text ascii file, with one data string entry per line.
- Hexadecimal encoding can be either 'full' or 'formatted' on a per line basis:
Full line encoding should be used if there are no formatted spacing entries [{}, (), *]
included on the line. Prefix unformatted lines with: '-:' (no quote marks).
Example:
-:This signature contains no formatted spacing fields
Encodes to:
54686973207369676e617475726520636f6e7461696e73206e6f20666f726d61747465642073706163696e67206669656c6473
Formatted line encoding should be used if there are user added spacing entries [{}, (), *]
included on the line. Prefix formatted lines with '=:' (no quote marks).
Example:
=:This signature{-10}contains several(25|26|27)formatted spacing*fields
Encodes to:
54686973207369676e6174757265{-10}636f6e7461696e73207365766572616c(25|26|27)666f726d61747465642073706163696e67*6669656c6473
Use 'full' encoding if you want to encode everything on the line [including {}, (), *] and 'formatted'
encoding if you want to encode everything on the line except the formatted character spacing fields.
The prefixes ('-:' and '=:') will be stripped from the line before hexadecimal encoding is done.
If no prefix is found at the beginning of the line, full line encoding will be done (default).
- It is assumed that the signatures will be created for email scanning purposes, thus the '4'
target type is used and full file scanning is enabled (see ClamAV signatures.pdf for details).
- Line numbering will be done automatically by the script.
" | command sed 's/^ //g'
echo -n "Do you wish to continue? "
if xshok_prompt_confirm ; then
echo -n "Enter the source file as /path/filename: "
read -r source
if [ -r "$source" ] ; then
source_file="$(basename "$source")"
xshok_pretty_echo_and_log "What signature prefix would you like to use? For example: 'Phish.Domains'"
xshok_pretty_echo_and_log "will create signatures that looks like: 'Phish.Domains.1:4:*:HexSigHere'"
echo -n "Enter signature prefix: "
read -r prefix
path_file="$(echo "$source" | cut -d "." -f -1 | command sed 's/$/.ndb/')"
db_file="$(basename "$path_file")"
rm -f "$path_file"
total="$(wc -l "$source" | cut -d " " -f 1)"
line_num="1"
while read -r line ; do