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clamav-unofficial-sigs.sh
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clamav-unofficial-sigs.sh
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#!/bin/bash
################################################################################
# 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 :: admin@extremeshok.com
################################################################################
#
# Script updates can be found at: https://github.com/extremeshok/clamav-unofficial-sigs
#
# Originially based on:
# Script provide by Bill Landry (unofficialsigs@gmail.com).
#
# License: BSD (Berkeley Software Distribution)
#
################################################################################
#
# 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 -1 "$0" | head -1 | cut -c1-7 )" == "exit \$?" ] ; then
echo "FATAL ERROR: Script is incomplete, please redownload"
exit 1
fi
# trap the keyboard interrupt (ctrl+c)
trap xshok_control_c SIGINT
################################################################################
# HELPER FUNCTIONS
################################################################################
# Function to support user config settings for applying file and directory access permissions.
function perms () {
if [ -n "$clam_user" ] && [ -n "$clam_group" ] ; then
"${@:-}"
fi
}
# Function to 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"
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
}
# Function to create a pid file
function xshok_create_pid_file { #pid.file
if [ "$1" ] ; then
pidfile="$1"
echo $$ > "$pidfile"
if [ $? -ne 0 ] ; 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
}
# Function to intercept ctrl+c and calls the cleanup function
function xshok_control_c () {
echo -en "\n"
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 $?
}
# Function to check if the current running user is the root user, otherwise return false
function xshok_is_root () {
if [ "$(uname -s)" = "SunOS" ] ; then
id_bin="/usr/xpg4/bin/id"
else
id_bin="$(which id)"
fi
if [ "$($id_bin -u)" = 0 ] ; then
return 0 ;
else
return 1 ; #not root
fi
}
# Function to 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
}
# Function to 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
filepath=$(echo "$1" | sed 's:/*$::')
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
}
# Function to create a dir and set the ownership
function xshok_mkdir_ownership () { #"path"
if [ "$1" ] ; then
mkdir -p "$1" 2>/dev/null
if [ $? -ne 0 ] ; then
xshok_pretty_echo_and_log "ERROR: Could not create directory: $1"
exit 1
fi
perms chown -f "$clam_user:$clam_group" "$1" > /dev/null 2>&1
else
xshok_pretty_echo_and_log "ERROR: Missing value for option" "="
exit 1
fi
}
# Function to check if a user and group exists on the system otherwise return false
# Usage:
# xshok_is_subdir "username" && echo "user found" || echo "no"
# xshok_is_subdir "username" "groupname" && echo "user and group found" || echo "no"
function xshok_user_group_exists () { #"username" "groupname"
if [ "$(uname -s)" = "SunOS" ] ; then
id_bin="/usr/xpg4/bin/id"
else
id_bin="$(which id)"
fi
if [ "$1" ] ; then
$id_bin -u "$1" > /dev/null 2>&1
if [ $? -eq 0 ]; then
if [ "$2" ] ; then
$id_bin -g "$2" > /dev/null 2>&1
if [ $? -eq 0 ]; then
return 0 ; #user and group exists
else
return 1 ; #group does NOT exist
fi
else
return 0 ; #user exists
fi
else
return 1 ; #user does NOT exist
fi
else
xshok_pretty_echo_and_log "ERROR: Missing value for option" "="
exit 1
fi
}
# Function to handle comments with/out borders and logging.
# Usage:
# pretty_echo_and_log "one"
# one
# pretty_echo_and_log "two" "-"
# ---
# two
# ---
# pretty_echo_and_log "three" "=" "8"
# ========
# three
# ========
# pretty_echo_and_log "" "/\" "7"
# /\/\/\/\/\/\
#type: e = error, w= warning ""
function xshok_pretty_echo_and_log () { #"string" "repeating" "count" "type"
# handle comments
if [ "$comment_silence" = "no" ] ; then
if [ "${#@}" = "1" ] ; then
echo "$1"
else
myvar=""
if [ -n "$3" ] ; then
mycount="$3"
else
mycount="${#1}"
fi
for (( n = 0; n < mycount; n++ )) ; do
myvar="$myvar$2"
done
if [ "$1" != "" ] ; then
echo -e "$myvar\n$1\n$myvar"
else
echo -e "$myvar"
fi
fi
fi
# handle logging
if [ "$enable_log" == "yes" ] ; then
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
}
# function to 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
}
# function to count array elements and output the total element count
# required due to compound array assignment
# Usage:
# array=("one" "two" "three")
# xshok_array_count $array
# 3
function xshok_array_count () { #array
k_array=( "$@" )
if [ -n "${k_array[*]}" ] ; then
i="0"
for k in "${k_array[@]}" ; do
let i=$i+1;
done
echo "$i"
else
echo "0"
fi
}
# function to auto update
function xshok_auto_update() { #version
xshok_pretty_echo_and_log "Performing automatic update..."
# Download new version
echo -n "Downloading latest version..."
if ! wget --quiet --output-document="$0.tmp" $UPDATE_BASE/$SELF ; then
echo "Failed: Error while trying to wget new version!"
echo "File requested: $UPDATE_BASE/$SELF"
exit 1
fi
echo "Done."
# Copy over modes from old version
OCTAL_MODE=$(stat -c '%a' $SELF)
if ! chmod $OCTAL_MODE "$0.tmp" ; then
echo "Failed: Error while trying to set mode on $0.tmp."
exit 1
fi
# Generate the update script
cat > xshok_update_script.sh << EOF
#!/bin/bash
# Overwrite old file with new
if mv "$0.tmp" "$0"; then
echo "Done. Update complete."
rm \$0
else
echo "Failed! The update was not completed."
fi
EOF
echo -n "Inserting update process..."
#replaced with $0, so code will update and then call itself with the same parameters it had
#exec /bin/bash xshok_update_script.sh
exec "$0" "$@"
}
#function to 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
}
# Function to 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 () { #database #rating
# assign
current_dbs="$1"
current_rating="$2"
# zero
new_dbs=""
if [ -n "$current_dbs" ] ; then
if [ "$(xshok_array_count "$current_dbs")" -ge "1" ] ; then
for db_name in $current_dbs ; do
#checks
if [ "$enable_yararules" == "no" ] ; then #yararules are disabled
if [[ "$db_name" = *".yar"* ]] ; then # if it's the value you want to delete
continue # skip to the next value
fi
fi
if [ "$current_rating" == "" ] ; then #yararules are disabled
new_dbs="$new_dbs $db_name"
else
if [[ ! "$db_name" = *"|"* ]] ; then # this old format
new_dbs="$new_dbs $db_name"
else
db_name_rating=$(echo "$db_name" | cut -d "|" -f2)
db_name=$(echo "$db_name" | cut -d "|" -f1)
if [ "$db_name_rating" != "DISABLED" ] ; then
if [ "$db_name_rating" == "$current_rating" ] ; then
new_dbs="$new_dbs $db_name"
elif [ "$db_name_rating" == "REQUIRED" ] ; then
new_dbs="$new_dbs $db_name"
elif [ "$current_rating" == "LOW" ] ; then
if [ "$db_name_rating" == "LOWONLY" ] || [ "$db_name_rating" == "LOW" ] || [ "$db_name_rating" == "LOWMEDIUM" ] ; then
new_dbs="$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" == "LOWMEDIUM" ] ; then
new_dbs="$new_dbs $db_name"
fi
elif [ "$current_rating" == "HIGH" ] ; then
if [ "$db_name_rating" == "HIGH" ] || [ "$db_name_rating" == "MEDIUM" ] || [ "$db_name_rating" == "LOW" ] ; then
new_dbs="$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
echo "This script (clamav-unofficial-sigs) was installed on the system via '$pkg_mgr'"
exit 1
fi
echo ""
echo "Generating man file for install...."
#Use defined varibles or attempt to use default varibles
if [ ! -e "$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
echo "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 :: admin@extremeshok.com
.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 :: admin@extremeshok.com
Originially based on Script provide by Bill Landry
EOF
fi
echo "Completed: man installed, as file: $man_dir/$man_filename"
}
#generates a logrotate config and installs it
function install_logrotate () {
if [ -n "$pkg_mgr" ] || [ -n "$pkg_rm" ] ; then
echo "This script (clamav-unofficial-sigs) was installed on the system via '$pkg_mgr'"
exit 1
fi
echo ""
echo "Generating logrotate file for install...."
#Use defined varibles or attempt to use default varibles
if [ ! -n "$logrotate_user" ] ; then
logrotate_user="$clam_user";
fi
if [ ! -n "$logrotate_group" ] ; then
logrotate_group="$clam_group";
fi
if [ ! -n "$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
echo "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 :: admin@extremeshok.com
##################
#
# Script updates can be found at: https://github.com/extremeshok/clamav-unofficial-sigs
#
# Originially based on:
# Script provide by Bill Landry (unofficialsigs@gmail.com).
#
# 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 0644 $logrotate_user $logrotate_group
}
EOF
fi
echo "Completed: logrotate installed, as file: $logrotate_dir/$logrotate_filename"
}
#generates a cron config and installs it
function install_cron () {
if [ -n "$pkg_mgr" ] || [ -n "$pkg_rm" ] ; then
echo "This script (clamav-unofficial-sigs) was installed on the system via '$pkg_mgr'"
exit 1
fi
echo ""
echo "Generating cron file for install...."
#Use defined varibles or attempt to use default varibles
if [ ! -n "$cron_minute" ] ; then
cron_minute=$(( ( RANDOM % 59 ) + 1 ));
fi
if [ ! -n "$cron_user" ] ; then
cron_user="$clam_user";
fi
if [ ! -n "$cron_bash" ] ; then
cron_bash=$(which bash)
fi
if [ ! -n "$cron_script_full_path" ] ; then
cron_script_full_path="$this_script_full_path"
fi
if [ ! -e "$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
echo "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 :: admin@extremeshok.com
##################
#
# Script updates can be found at: https://github.com/extremeshok/clamav-unofficial-sigs
#
# Originially based on:
# Script provide by Bill Landry (unofficialsigs@gmail.com).
#
# 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.
$cron_minute * * * * $cron_user [ -x $cron_script_full_path ] && $cron_bash $cron_script_full_path > /dev/null
# https://eXtremeSHOK.com ######################################################
EOF
fi
echo "Completed: cron installed, as file: $cron_dir/$cron_filename"
}
#decode a third-party signature either by signature name
function decode_third_party_signature_by_signature_name () {
echo ""
echo "Input a third-party signature name to decode (e.g: Sanesecurity.Junk.15248) or"
echo "a hexadecimal encoded data string and press enter (do not include '.UNOFFICIAL'"
echo "in the signature name nor add quote marks to any input string):"
read -r input
input=$(echo "$input" | tr -d "'" | tr -d '"')
if echo "$input" | $grep_bin "\." > /dev/null ; then
cd "$clam_dbs" || exit
sig=$($grep_bin "$input:" ./*.ndb)
if [ -n "$sig" ] ; then
db_file=$(echo "$sig" | cut -d ':' -f1)
echo "$input found in: $db_file"
echo "$input signature decodes to:"
echo "$sig" | cut -d ":" -f5 | perl -pe 's/([a-fA-F0-9]{2})|(\{[^}]*\}|\([^)]*\))/defined $2 ? $2 : chr(hex $1)/eg'
else
echo "Signature '$input' could not be found."
echo "This script will only decode ClamAV 'UNOFFICIAL' third-Party,"
echo "non-image based, signatures as found in the *.ndb databases."
fi
else
echo "Here is the decoded hexadecimal input string:"
echo "$input" | perl -pe 's/([a-fA-F0-9]{2})|(\{[^}]*\}|\([^)]*\))/defined $2 ? $2 : chr(hex $1)/eg'
fi
}
#Hexadecimal encode an entire input string
function hexadecimal_encode_entire_input_string () {
echo ""
echo "Input the data string that you want to hexadecimal encode and then press enter. Do not include"
echo "any quotes around the string unless you want them included in the hexadecimal encoded output:"
read -r input
echo "Here is the hexadecimal encoded input string:"
echo "$input" | perl -pe 's/(.)/sprintf("%02lx", ord $1)/eg'
}
#Hexadecimal encode a formatted input string
function hexadecimal_encode_formatted_input_string () {
echo ""
echo "Input a formated data string containing spacing fields '{}, (), *' that you want to hexadecimal"
echo "encode, without encoding the spacing fields, and then press enter. Do not include any quotes"
echo "around the string unless you want them included in the hexadecimal encoded output:"
read -r input
echo "Here is the hexadecimal encoded input string:"
echo "$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
echo ""
if [ "$1" ] ; then
db_file=$(echo "$1" | awk -F '/' '{print $NF}')
if [ -r "$work_dir_sanesecurity/$db_file" ] ; then
echo "GPG signature testing database file: $work_dir_sanesecurity/$db_file"
if [ -r "$work_dir_sanesecurity/$db_file".sig ] ; then
"$gpg_bin" -q --trust-model always --no-default-keyring --homedir "$work_dir_gpg" --keyring "$work_dir_gpg"/ss-keyring.gpg --verify "$work_dir_sanesecurity"/"$db_file".sig "$work_dir_sanesecurity"/"$db_file"
if [ "$?" != "0" ]; then
"$gpg_bin" -q --always-trust --no-default-keyring --homedir "$work_dir_gpg" --keyring "$work_dir_gpg"/ss-keyring.gpg --verify "$work_dir_sanesecurity"/"$db_file".sig "$work_dir_sanesecurity"/"$db_file"
if [ "$?" == "0" ]; then
exit 0
else
exit 1
fi
else
exit 0
fi
else
echo "Signature '$db_file.sig' cannot be found."
fi
else
echo "File '$db_file' cannot be found or is not a Sanesecurity database file."
echo "Only the following Sanesecurity and OITC databases can be GPG signature tested:"
ls --ignore "*.sig" --ignore "*.md5" --ignore "*.ign2" "$work_dir_sanesecurity"
fi
else
xshok_pretty_echo_and_log "ERROR: Missing value for option" "="
exit 1
fi
}
#Output system and configuration information
function output_system_configuration_information () {
echo ""
echo "*** SCRIPT VERSION ***"
echo "$this_script_name $script_version ($script_version_date)"
echo "*** SYSTEM INFORMATION ***"
$uname_bin -a
echo "*** CLAMSCAN LOCATION & VERSION ***"
echo "$clamscan_bin"
$clamscan_bin --version | head -1
echo "*** RSYNC LOCATION & VERSION ***"
echo "$rsync_bin"
$rsync_bin --version | head -1
if [ "$wget_bin" != "" ] ; then
echo "*** WGET LOCATION & VERSION ***"
echo "$wget_bin"
$wget_bin --version | head -1
else
echo "*** CURL LOCATION & VERSION ***"
echo "$curl_bin"
$curl_bin --version | head -1
fi
echo "*** GPG LOCATION & VERSION ***"
echo "$gpg_bin"
$gpg_bin --version | head -1
echo "*** SCRIPT WORKING DIRECTORY INFORMATION ***"
echo "$work_dir"
echo "*** CLAMAV DIRECTORY INFORMATION ***"
echo "$clam_dbs"
echo "*** SCRIPT CONFIGURATION SETTINGS ***"
if [ "$custom_config" != "no" ] ; then
if [ -d "$custom_config" ] ; then
# Assign the custom config dir and remove trailing / (removes / and //)
echo "Custom Configuration Directory: $config_dir"
else
echo "Custom Configuration File: $custom_config"
fi
else
echo "Configuration Directory: $config_dir"
fi
}
#Make a signature database from an ascii file
function make_signature_database_from_ascii_file () {
echo ""
echo "
The '-m' script flag provides a way to create a ClamAV hexadecimal signature database (*.ndb) file
from a list of data strings stored in a clear-text ascii file, with one data string entry per line.
- Hexadecimal encoding can be either 'full' or 'formatted' on a per line basis:
Full line encoding should be used if there are no formatted spacing entries [{}, (), *]
included on the line. Prefix unformatted lines with: '-:' (no quote marks).
Example:
-:This signature contains no formatted spacing fields
Encodes to:
54686973207369676e617475726520636f6e7461696e73206e6f20666f726d61747465642073706163696e67206669656c6473
Formatted line encoding should be used if there are user added spacing entries [{}, (), *]
included on the line. Prefix formatted lines with '=:' (no quote marks).
Example:
=:This signature{-10}contains several(25|26|27)formatted spacing*fields
Encodes to:
54686973207369676e6174757265{-10}636f6e7461696e73207365766572616c(25|26|27)666f726d61747465642073706163696e67*6669656c6473
Use 'full' encoding if you want to encode everything on the line [including {}, (), *] and 'formatted'
encoding if you want to encode everything on the line except the formatted character spacing fields.
The prefixes ('-:' and '=:') will be stripped from the line before hexadecimal encoding is done.
If no prefix is found at the beginning of the line, full line encoding will be done (default).
- It is assumed that the signatures will be created for email scanning purposes, thus the '4'
target type is used and full file scanning is enabled (see ClamAV signatures.pdf for details).
- Line numbering will be done automatically by the script.
" | command sed 's/^ //g'
echo -n "Do you wish to continue? "
if xshok_prompt_confirm ; then
echo -n "Enter the source file as /path/filename: "
read -r source
if [ -r "$source" ] ; then
source_file=$(basename "$source")
echo "What signature prefix would you like to use? For example: 'Phish.Domains'"
echo "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 " " -f1)
line_num=1
while read -r line ; do
line_prefix=$(echo "$line" | awk -F ':' '{print $1}')
if [ "$line_prefix" = "-" ] ; then
echo "$line" | cut -d ":" -f2- | perl -pe 's/(.)/sprintf("%02lx", ord $1)/eg' | command sed "s/^/$prefix\.$line_num:4:\*:/" >> "$path_file"
elif [ "$line_prefix" = "=" ] ; then
echo "$line" | cut -d ":" -f2- | perl -pe 's/(\{[^}]*\}|\([^)]*\)|\*)|(.)/defined $1 ? $1 : sprintf("%02lx", ord $2)/eg' | command sed "s/^/$prefix\.$line_num:4:\*:/" >> "$path_file"
else
echo "$line" | perl -pe 's/(.)/sprintf("%02lx", ord $1)/eg' | command sed "s/^/$prefix\.$line_num:4:\*:/" >> "$path_file"
fi
echo "Hexadecimal encoding $source_file line: $line_num of $total"
line_num=$((line_num + 1))
done < "$source"
else
echo "Source file not found, exiting..."
exit
fi
echo "Signature database file created at: $path_file"
if $clamscan_bin --quiet -d "$path_file" "$work_dir_work_configs/scan-test.txt" 2>/dev/null ; then
echo "Clamscan reports database integrity tested good."
echo -n "Would you like to move '$db_file' into '$clam_dbs' and reload databases?"
if xshok_prompt_confirm ; then
if ! cmp -s "$path_file" "$clam_dbs/$db_file" ; then
if $rsync_bin -pcqt "$path_file" "$clam_dbs" ; then
perms chown -f "$clam_user:$clam_group" "$clam_dbs/$db_file"
perms chmod -f 0644 "$clam_dbs"/"$db_file"
if [ "$selinux_fixes" == "yes" ] ; then
restorecon "$clam_dbs/$db_file"
fi
$clamd_restart_opt
echo "Signature database '$db_file' was successfully implemented and ClamD databases reloaded."
else
echo "Failed to add/update '$db_file', ClamD database not reloaded."
fi
else
echo "Database '$db_file' has not changed - skipping"
fi
else
echo "No action taken."
fi
else
echo "Clamscan reports that '$db_file' signature database integrity tested bad."
fi
fi
}
#Remove the clamav-unofficial-sigs script
function remove_script () {
echo ""
if [ -n "$pkg_mgr" ] || [ -n "$pkg_rm" ] ; then
echo "This script (clamav-unofficial-sigs) was installed on the system via '$pkg_mgr'"
echo "use '$pkg_rm' to remove the script and all of its associated files and databases from the system."
else
cron_file_full_path="$cron_dir/$cron_filename"
logrotate_file_full_path="$logrotate_dir/$logrotate_filename"
man_file_full_path="$man_dir/$man_filename"
echo "This will remove the workdir ($work_dir), logrotate file ($logrotate_file_full_path), cron file ($cron_file_full_path), man file ($man_file_full_path)"
echo "Are you sure you want to remove the clamav-unofficial-sigs script and all of its associated files, third-party databases, and work directory from the system?"
if xshok_prompt_confirm ; then
echo "This can not be undone are you sure ?"
if xshok_prompt_confirm ; then
if [ -r "$work_dir_work_configs/purge.txt" ] ; then
while read -r file ; do
xshok_is_file "$file" && rm -f -- "$file"
echo " Removed file: $file"
done < "$work_dir_work_configs"/purge.txt
if [ -r "$cron_file_full_path" ] ; then
xshok_is_file "$cron_file_full_path" && rm -f "$cron_file_full_path"
echo " Removed file: $cron_file_full_path"
fi
if [ -r "$logrotate_file_full_path" ] ; then
xshok_is_file "$logrotate_file_full_path" && rm -f "$logrotate_file_full_path"
echo " Removed file: $logrotate_file_full_path"
fi
if [ -r "$man_file_full_path" ] ; then
xshok_is_file "$man_file_full_path" && rm -f "$man_file_full_path"
echo " Removed file: $man_file_full_path"
fi
#rather keep the configs
#rm -f -- "$default_config" && echo " Removed file: $default_config"
#rm -f -- "$0" && echo " Removed file: $0"
xshok_is_subdir "$work_dir" && rm -rf -- "$work_dir" && echo " Removed script working directories: $work_dir"
echo " The clamav-unofficial-sigs script and all of its associated files, third-party"
echo " databases, and work directories have been successfully removed from the system."
else
echo " Cannot locate 'purge.txt' file in $work_dir_work_configs."
echo " Files and signature database will need to be removed manually."
fi
else
echo "Aborted"
fi
else
echo "Aborted"
fi
fi
}
#Clamscan integrity test a specific database file
function clamscan_integrity_test_specific_database_file () { #databasefile
echo ""
if [ "$1" ] ; then
input=$(echo "$1" | awk -F '/' '{print $NF}')
db_file=$(find "$work_dir" -name "$input")
if [ -r "$db_file" ] ; then
echo "Clamscan integrity testing: $db_file"
$clamscan_bin --quiet -d "$db_file" "$work_dir_work_configs/scan-test.txt"
if [ "$?" -eq "0" ]; then
echo "Clamscan reports that '$input' database integrity tested GOOD"
exit 0
else
echo "Clamscan reports that '$input' database integrity tested BAD"
exit 1
fi
else
echo "File '$input' cannot be found."
echo "Here is a list of third-party databases that can be clamscan integrity tested:"
echo "=== Sanesecurity ==="
ls --ignore "*.sig" --ignore "*.md5" --ignore "*.ign2" "$work_dir_sanesecurity"
echo "=== SecuriteInfo ==="
ls --ignore "*.sig" --ignore "*.md5" --ignore "*.ign2" "$work_dir_securiteinfo"
echo "=== MalwarePatrol ==="
ls --ignore "*.sig" --ignore "*.md5" --ignore "*.ign2" "$work_dir_malwarepatrol"
echo "=== Linux Malware Detect ==="
ls --ignore "*.sig" --ignore "*.md5" --ignore "*.ign2" "$work_dir_linuxmalwaredetect"
echo "=== Linux Malware Detect ==="
ls --ignore "*.sig" --ignore "*.md5" --ignore "*.ign2" "$work_dir_yararulesproject"
echo "=== User Defined Databases ==="
ls --ignore "*.sig" --ignore "*.md5" --ignore "*.ign2" "$work_dir_add"
echo "Check the file name and try again..."
fi
else
xshok_pretty_echo_and_log "ERROR: Missing value for option" "="
exit 1
fi
}
#output names of any third-party signatures that triggered during the HAM directory scan
function output_signatures_triggered_during_ham_directory_scan () {
echo ""
if [ -n "$ham_dir" ] ; then
if [ -r "$work_dir_work_configs/whitelist.hex" ] ; then
echo "The following third-party signatures triggered hits during the HAM Directory scan:"
$grep_bin -h -f "$work_dir_work_configs/whitelist.hex" "$work_dir"/*/*.ndb | cut -d ":" -f1
else
echo "No third-party signatures have triggered hits during the HAM Directory scan."
fi
else
echo "Ham directory scanning is not currently enabled in the script's configuration file."
fi
}
#Adds a signature whitelist entry in the newer ClamAV IGN2 format
function add_signature_whitelist_entry () {
echo ""
echo "Input a third-party signature name that you wish to whitelist due to false-positives"
echo "and press enter (do not include '.UNOFFICIAL' in the signature name nor add quote"
echo "marks to the input string):"
read -r input
if [ -n "$input" ] ; then
cd "$clam_dbs" || exit
input=$(echo "$input" | tr -d "'" | tr -d '"')
sig_full=$($grep_bin -H "$input" ./*.*db)
sig_name=$(echo "$sig_full" | cut -d ":" -f2)
if [ -n "$sig_name" ] ; then
if ! $grep_bin "$sig_name" my-whitelist.ign2 > /dev/null 2>&1 ; then
cp -f my-whitelist.ign2 "$work_dir_work_configs" 2>/dev/null
echo "$sig_name" >> "$work_dir_work_configs/my-whitelist.ign2"
echo "$sig_full" >> "$work_dir_work_configs/tracker.txt"
if $clamscan_bin --quiet -d "$work_dir_work_configs/my-whitelist.ign2" "$work_dir_work_configs/scan-test.txt" ; then
if $rsync_bin -pcqt "$work_dir_work_configs/my-whitelist.ign2" "$clam_dbs" ; then
perms chown -f "$clam_user:$clam_group" my-whitelist.ign2
if [ ! -s "$work_dir_work_configs/monitor-ign.txt" ] ; then
# Create "monitor-ign.txt" file for clamscan database integrity testing.
echo "This is the monitor ignore file..." > "$work_dir_work_configs/monitor-ign.txt"
fi
perms chmod -f 0644 my-whitelist.ign2 "$work_dir_work_configs/monitor-ign.txt"
if [ "$selinux_fixes" == "yes" ] ; then
restorecon "$clam_dbs/local.ign"
fi
clamscan_reload_dbs
echo "Signature '$input' has been added to my-whitelist.ign2 and"
echo "all databases have been reloaded. The script will track any changes"
echo "to the offending signature and will automatically remove it if the"
echo "signature is modified or removed from the third-party database."
else
echo "Failed to successfully update my-whitelist.ign2 file - SKIPPING."
fi
else