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Overthewire Vortex Level0

Reverse Engineering - Linux Crackme

Caesar-Verschlüsselung

Shellscript - Nagios Plugins - UCARP

Shellscript - Nagios Plugins - Swap & Memory

Posted by on Sunday, February 6. 2011

Mit http://www.overthewire.org/ scheint es (eine weitere) interessante Seite, mit sogenannten Wargames zu geben.

"The wargames offered by the OverTheWire community can help you to learn and practice security concepts in the form of funfilled games" (http://www.overthewire.org)

Na dann mal los......;D

Hier meine Lösung für Level0

Continue reading "Overthewire Vortex Level0"

Posted by on Wednesday, January 5. 2011

Linux Crackme

Ich hab vor einiger Zeit ein Crackme (mein erstes) für die Seite www.wechall.net geschrieben, vielleicht hat jemand Lust sich mal daran zu versuchen ;D

Download: www.rul3z.de/files/linux_crackme.elf

MD5: 46648616db30742a0b692de77431fd4d

SHA1: 5c8fcc5ceecc7f3185bbf73655d2e2e60ccb7b7e

RIPEMD160: c5b252ee94fe71f6b2925c32dc2b46e21d105652

Continue reading "Reverse Engineering - Linux Crackme"

Posted by on Monday, July 27. 2009

Caesar-Verschlüsselung

Hier ein kleines, von mir, in C geschriebens Programm mit welchem man die Caesar-Verschlüsselung ausprobieren kann ;)

Version 0.1

caesar_chiper.c

Posted by on Thursday, February 26. 2009

UCARP-Master

#!/bin/sh

virtuelle_ip=192.168.0.1
interface=eth1:1

/sbin/ifconfig $interface | grep $virtuelle_ip &> /dev/null

        if [ $? = 1 ]; then
                echo "CRITICAL – Virtual IP $ip on master"
                exit 1
        else
                /sbin/ifconfig $interface | grep $virtuelle_ip | cut -f 2 -d ":" | while read output;
        do
                ip=$(echo $output | awk ‘{print $1}’ )
                echo "OK – Virtual IP on master"
                exit 0
        done
fi

UCARP-Slave

#!/bin/sh

virtuelle_ip=192.168.0.1
interface=eth1:1

/sbin/ifconfig $interface | grep $virtuelle_ip &> /dev/null

        if [ $? = 1 ]; then
                echo "OK – No Virtual IP on slave"
                exit 0
        else
                /sbin/ifconfig $interface | grep $virtuelle_ip | cut -f 2 -d ":" | while read output;
        do
                ip=$(echo $output | awk ‘{print $1}’ )
                echo "CRITICAL – Virtual IP $ip on slave"
                exit 1
        done
fi

Download: ucarp_master.sh ucarp_slave.sh

October '24

Posted by on Wednesday, February 25. 2009

Plugin zum Überwachen des Arbeitsspeichers

#!/bin/sh

free -m | grep Mem | while read output;
do
mem=$(echo $output | awk ‘{print $2}’ )
used=$(echo $output | awk ‘{ print $3 }’ )
free=$(echo $output | awk ‘{ print $4 }’ )
use=`expr $used \* 100 / $mem`

if [ $use -ge 90 ]; then
    echo "CRITICAL Total Mem: \"$mem\" Used: \"$used ($use%)\" Free: \"$free\" "
    exit 2
elif [ $usep -ge 50 ]; then
    echo "WARNING Total Mem: \"$mem\" Used: \"$used ($use%)\" Free: \"$free\" "
    exit 1
else
    echo "OK Mem: $mem" "Used: $used" "Free: $free"
    exit 0
fi

done

Plugin zum Überwachen des Swap

#!/bin/sh
free -m | grep Swap | while read output;
do
swap=$(echo $output | awk ‘{print $2}’ )
used=$(echo $output | awk ‘{ print $3 }’ )
free=$(echo $output | awk ‘{ print $4 }’ )
use=`expr $used \* 100 / $swap`

if [ $use -ge 90 ]; then
    echo "CRITICAL Swap: \"$swap\" Used: \"$used ($use%)\" Free: \"$free\" "
    exit 2
elif [ $use -ge 50 ]; then
    echo "WARNING Swap: \"$swap\" Used: \"$used ($use%)\" Free: \"$free\" "
    exit 1
else
    echo "OK Swap: $swap" "Used: $used" "Free: $free"
    exit 0
fi

done

Download: memory.sh swap.sh