yanncam/shuckntShuckNT é o script do serviço online Shuck.sh para uso on-premise. Ele foi projetado para rebaixar, converter, dissecar e "shuck" tokens de autenticação baseados no Data Encryption Standard (DES).
ShuckNT é o script do serviço online Shuck.sh para uso on-premise (experimente online!). Ele foi projetado para fazer downgrade, converter, dissecar e fazer shuck de tokens de autenticação baseados no Data Encryption Standard (DES).
Algoritmos / formatos suportados :
$99$ShuckNT baseia-se no princípio de hash shucking para otimizar a quebra e exploração de challenge-response.
Password shucking é um método de remover camadas de um hash de senha atualizado, eliminando os benefícios do seu novo algoritmo de hashing de senha e revertendo-o para o seu algoritmo mais fraco. O password shucking pode ser usado por um atacante contra senhas antigas rehashadas ou senhas pré-hash, permitindo remover ou "shuck" a forte camada externa do algoritmo de hashing de senha.
A partir de uma lista de tokens de entrada, o ShuckNT fornece :
Por trás do script do Shuck.sh, o ShuckNT é simplesmente uma busca binária eficiente e otimizada para colisões de chaves DES a partir de um subconjunto de hashes NT candidatos, cujos dois últimos bytes são conhecidos, na base de dados HIBP em binário-reverso personalizado.
Durante uma avaliação de segurança (limitada em tempo), se você capturar ~100 NetNTLMv1 (com ou sem ESS) através de uma ferramenta como o Responder, a busca pelos hashes NT correspondentes (se vazados no HIBP) leva apenas alguns segundos via Shuck.sh/ShuckNT (~10s).
O script do Shuck.sh, o ShuckNT, trata de simplificar convertendo o algoritmo criptográfico para uma forma mais fraca (sem ESS, se possível, em formato gratuito para o Crack.Sh ou diretamente em formato de hash NT se vazado no HIBP). Assim, um challenge NetNTLMv1-ESS/SSP, PPTP VPN ou MSCHAPv2 (pago e demorado no Crack.Sh) pode potencialmente ser "shucked" instantaneamente e de graça!
A ideia inicial do Shuck.sh/ShuckNT nasceu do desejo de economizar tempo durante avaliações de segurança para clientes, de não depender de um serviço online de terceiros cuja disponibilidade não é necessariamente contínua e de poder ser localmente autônomo.
O processo de instalação consiste em:
Comandos de instalação:
# Install dependencies
apt install p7zip-full php git
# Get ShuckNT tool
git clone https://github.com/yanncam/ShuckNT
cd ShuckNT
# Prepare HaveIBeenPwned database (one time only, takes several minutes)
## Download latest HIBP-DB (can take severals minutes...)
wget https://downloads.pwnedpasswords.com/passwords/pwned-passwords-ntlm-ordered-by-hash-v8.7z
## Extract HIBP-DB (can take severals minutes...)
7z e pwned-passwords-ntlm-ordered-by-hash-v8.7z
## Reverse all hashes (can take severals minutes...)
php shucknt.php -r pwned-passwords-ntlm-ordered-by-hash-v8.txt -t pwned-passwords-ntlm-ordered-by-hash-v8.txt-reversed
## Sort all reversed-hashes (can take severals minutes...)
sort pwned-passwords-ntlm-ordered-by-hash-v8.txt-reversed -o pwned-passwords-ntlm-ordered-by-hash-v8.txt-reversed-sorted
## Convert to binary format (can take severals minutes...)
php shucknt.php -b pwned-passwords-ntlm-ordered-by-hash-v8.txt-reversed-sorted -t pwned-passwords-ntlm-reversed-ordered-by-hash-v8.bin
## Free space to keep only pwned-passwords-ntlm-reversed-ordered-by-hash-v8.bin
rm -f pwned-passwords-ntlm-ordered-by-hash-v8.7z
rm -f pwned-passwords-ntlm-ordered-by-hash-v8.txt
rm -f pwned-passwords-ntlm-ordered-by-hash-v8.txt-reversed
rm -f pwned-passwords-ntlm-ordered-by-hash-v8.txt-reversed-sorted
# Enjoy ShuckNT via commandline, or web http://[HOST]/shucknt.php
php shucknt.php -h
A geração da base de dados no formato esperado pelo ShuckNT deve ser feita num sistema Unix/Linux.
O uso do ShuckNT com uma base de dados válida foi testado em Windows/Linux com PHP7/8+.
Por favor, note que o ShuckNT usa a extensão PHP-OpenSSL com o algoritmo DES-ECB. Portanto, para versões modernas de PHP com OpenSSL3, ative o provedor legado.
Checksums para cada etapa:
$ sha1sum pwned-passwords-ntlm-*
225a993a908e3d73ffa68859c4f128e17359358e pwned-passwords-ntlm-ordered-by-hash-v8.7z
4b6c4728c21f64d6a58c7b63d98dcf342c068407 pwned-passwords-ntlm-ordered-by-hash-v8.txt
88094c4a332ecfac9a15c23ba886194d1810b0b2 pwned-passwords-ntlm-ordered-by-hash-v8.txt-reversed
d5486dfbf960f36ff0e1cf313a1b80db5cd4137f pwned-passwords-ntlm-ordered-by-hash-v8.txt-reversed-sorted
31a5c1b605cca5bcf71196c70f291c05aa3fe86c pwned-passwords-ntlm-reversed-ordered-by-hash-v8.bin
$ sha256sum pwned-passwords-ntlm-*
ea83d536387e6b149f2e362bf7dfbf521523812611359f47620fd44dae9770ee pwned-passwords-ntlm-ordered-by-hash-v8.7z
916cfd1772d24f2fe99aa5f37d4a465359c7b6f7d39f45ffbf27deca697b7116 pwned-passwords-ntlm-ordered-by-hash-v8.txt
76f9e101801dfc44489cad4edec5f14d634c2b4676bb9ffbc7e9968c9a5356a5 pwned-passwords-ntlm-ordered-by-hash-v8.txt-reversed
6ee13a35ed88e8073be088a20560cb9fefcc6d08e599241244eaee01dc053a44 pwned-passwords-ntlm-ordered-by-hash-v8.txt-reversed-sorted
ac2f6bf681fbe636b94f3ce3f2b594ef3d0af7671375478db1153874e8a5d873 pwned-passwords-ntlm-reversed-ordered-by-hash-v8.bin
O ShuckNT é um script PHP independente (standalone), sem dependências. Pode ser usado na linha de comando (CLI) ou através de um navegador Web.
Ajuda, argumentos e sintaxe:
$ php shucknt.php -h
__ _ _ __ _____
/ _\ |__ _ _ ___| | __ /\ \ \/__ \
\ \| '_ \| | | |/ __| |/ // \/ / / /\/
_\ \ | | | |_| | (__| </ /\ / / /
\__/_| |_|\__,_|\___|_|\_\_\ \/ \/ v1.0
DES-based authentication token shucker (https://shuck.sh)
@author : ycam | @asafety.fr / @yann.cam
ShuckNT is design to dowgrade, convert, dissect and shuck authentication token based on Data Encryption Standard (DES).
Algorithms / formats supported :
- NetNTLMv1(-ESS/SSP)
- MSCHAPv2
- NET(NT)LM
- (LM|NT)HASH
- PPTP-VPN $99$
- All with any challenge value!
ShuckNT rely on "hash shucking" principle to optimize challenge-response cracking and exploitability.
From a list of input tokens, ShuckNT provides :
- The NT-hash instantly (pass-the-hash ready) through a smart-research in the HaveIBeenPwned latest database (if present);
- The Crack.Sh ready-to-use optimized token, to pay less or nothing if NT-hash not found in HIBP-DB;
- Several converted formats to try to crack them via other tools (hashcat, jtr, CloudCracker, etc.) :
- Hashcat mode 5500 : to crack NetNTLMv1 to plaintext (unpredictable result, depend on wordlists, masks, rules...);
- Hashcat mode 27000: to shuck NetNTLMv1 to NT-hash (unpredictable result / depend on NT-wordlists...);
- Hashcat mode 14000: to shuck NetNTLMv1 to DES-keys then NT-hash (100% result / time needed);
- All the details of the dissection of the challenge-response (PT1/2/3, K1/2/3, CT1/2/3, HIBP occurences/candidates, LMresp, NTresp, challenges, etc.).
Use '-h' to print help.
usage: php shucknt.php [-h] [-f tokens.txt] [-i 'tokenValue'] [-w wordlist.bin] [-o json|stdout|web] [-v]
[-r input_wordlist.txt] [-b input_wordlist_reversed_sorted.txt] [-r output_wordlist] [-j]
Arguments details:
-h Print this help
-f tokens.txt Input tokens file, one per line.
-i 'tokenValue' Inline input token from stdin.
-w wordlist.bin Specific binary-reversed-sorted-wordlist to use.
-o json|stdout|web Commandline output in json, stdout or web format.
-v Verbosity for stdout output format only.
-r input_wordlist.txt Input wordlist file to be reversed.
-b input_wordlist.txt Input reversed-sorted-wordlist file to be binarized.
-r output_wordlist Output file for reversal or binarization.
-j Do not display header (for json output).
These are common ShuckNT commands used in various situations:
# Shuck tokens from an input file to stdout with verbosity:
php shucknt.php -f tokens.txt -w pwned-passwords-ntlm-reversed-ordered-by-hash-v8.bin -v
# Shuck token from stdin to json output:
php shucknt.php -i '$99$1a7F1qr2HihoXfs/56u5XMdpDZ83N6hW/HI=' -w pwned-passwords-ntlm-reversed-ordered-by-hash-v8.bin -o json -j
# Shuck token from stdin to light stdout (use default wordlist defined as constant in script):
php shucknt.php -i 'ycam::ad:DEADC0DEDEADC0DE00000000000000000000000000000000:70C249F75FB6D2C0AC2C2D3808386CCAB1514A2095C582ED:1122334455667788'
# Reverse HIBPDB to output file:
php shucknt.php -r pwned-passwords-ntlm-ordered-by-hash-v8.txt -t pwned-passwords-ntlm-ordered-by-hash-v8.txt-reversed
# Binarize HIBPDB already reversed and sorted to output file:
php shucknt.php -b pwned-passwords-ntlm-ordered-by-hash-v8.txt-reversed-sorted -t pwned-passwords-ntlm-reversed-ordered-by-hash-v8.bin
Faça o shuck instantâneo de um token de autenticação NetNTLMv1 com ESS/SSP para o seu hash NT correspondente, a partir do stdin (com HIBP-DB padrão) e saída detalhada:
$ php shucknt.php -i 'ycam::ad:DEADC0DEDEADC0DE00000000000000000000000000000000:70C249F75FB6D2C0AC2C2D3808386CCAB1514A2095C582ED:1122334455667788' -v
[...]
1 hashes-challenges analyzed in 0 seconds, with 1 NT-Hash instantly broken for pass-the-hash and 0 that can be broken via crack.sh for free.
[INPUT] ycam::ad:DEADC0DEDEADC0DE00000000000000000000000000000000:70C249F75FB6D2C0AC2C2D3808386CCAB1514A2095C582ED:1122334455667788
[USERNAME] ycam
[DOMAIN] ad
[LMRESP] DEADC0DEDEADC0DE00000000000000000000000000000000
[NTRESP] 70C249F75FB6D2C0AC2C2D3808386CCAB1514A2095C582ED
[CT1] 70C249F75FB6D2C0
[CT2] AC2C2D3808386CCA
[CT3] B1514A2095C582ED
[ESS] YES
[CLIENTCHALL] 1122334455667788
[SERVERCHALL] DEADC0DEDEADC0DE
[CHALLENGE] C85086419358F950
[NTHASH-SHUCKED] 93B3C62269D55DB9CA660BBB91E2BD0B
[HIBP-CANDIDATES] 12778
[HIBP-OCCURENCE] 15
[PT1] 93B3C62269D55D
[PT2] B9CA660BBB91E2
[PT3] BD0B
[K1] 93D9F1C5274F55BB
[K2] B9E599C1BBDD47C5
[K3] BD85C10101010101
[CRACK.SH-TOKEN] $NETLM$C85086419358F950$70C249F75FB6D2C0AC2C2D3808386CCAB1514A2095C582ED (20-300$)
[FORMAT-NETNTLMV1-NO-ESS] ycam::ad::70C249F75FB6D2C0AC2C2D3808386CCAB1514A2095C582ED:C85086419358F950
[FORMAT-MSCHAPV2] $MSCHAPv2$C85086419358F950$70C249F75FB6D2C0AC2C2D3808386CCAB1514A2095C582ED$
[FORMAT-NET(NT)LM] $NETLM$C85086419358F950$70C249F75FB6D2C0AC2C2D3808386CCAB1514A2095C582ED
[FORMAT-PPTP] $99$yFCGQZNY+VBwwkn3X7bSwKwsLTgIOGzKvQs=
Faça o shuck instantâneo de muitos tokens de autenticação de formatos suportados para os seus hashes NT correspondentes, a partir de um arquivo de entrada (com HIBP-DB especificado) e saída simples:
$ php shucknt.php -f tokens-samples.txt -w pwned-passwords-ntlm-reversed-ordered-by-hash-v8.bin
[...]
10 hashes-challenges analyzed in 3 seconds, with 8 NT-Hash instantly broken for pass-the-hash and 1 that can be broken via crack.sh for free.
[INPUT] $99$1a7F1qr2HihoXfs/56u5XMdpDZ83N6hW/HI=
[NTHASH-SHUCKED] DE26CCE0356891A4A020E7C4957AFC72
[INPUT] LMHASH:2B56DAEB658F9FE977BD3B61E7976684388EF712DB95C6F8
[NTHASH-SHUCKED] C780C78872A102256E946B3AD238F661
[INPUT] NTHASH:D4ACBAA3CD626E2A074D76C7491D332F8FB8989968E88736
[NTHASH-SHUCKED] C22B315C040AE6E0EFEE3518D830362B
[INPUT] ycam::ad:DEADC0DEDEADC0DE00000000000000000000000000000000:70C249F75FB6D2C0AC2C2D3808386CCAB1514A2095C582ED:1122334455667788
[NTHASH-SHUCKED] 93B3C62269D55DB9CA660BBB91E2BD0B
[INPUT] $NETNTLM$4803CB182E23B79A$BA4DA703C6A056727CC7B62FFA065970D5D400F18D02C6D1
[NTHASH-SHUCKED] 8E2FDD50C6FB5D0E22E2455394D98D2A
[INPUT] user::domain.tld:727B4E35F947129EA52B9CDEDAE86934BB23EF89F50FC595:727B4E35F947129EA52B9CDEDAE86934BB23EF89F50FC595:1122334455667788
[NTHASH-SHUCKED] 8846F7EAEE8FB117AD06BDD830B7586C
[INPUT] $MSCHAPv2$1337133713371337$F93A1DB1C044133F52582EFDA5C31667EBBE6F8F2814E539$root
[NTHASH-SHUCKED] 209C6174DA490CAEB422F3FA5A7AE634
[INPUT] $NETLM$FE2CFD84F6C7DEF8$852074A98A9B2AF70D59D449AD0F9B898B4A9455C7B90CE7
[NTHASH-SHUCKED] 0A42BC909E226C6F8FFCBAA6AB0DA43D
[INPUT] $99$ESIzRFVmd4i8671kB52wcm9qK5VdJR7lJKU=
[CRACK.SH-TOKEN] NTHASH:BCEBBD64079DB0726F6A2B955D251EE57D6DD8A109D77A0D (0$)
[INPUT] x::x:FEC7A34F78C17A9700000000000000000000000000000000:E875F0A28BD7729D071D7DF05272B0FB4549AE926FE36255:1122334455667788
[CRACK.SH-TOKEN] $NETLM$1A6A5C911D8A4DF2$E875F0A28BD7729D071D7DF05272B0FB4549AE926FE36255 (20-300$)
Faça o shuck de tokens apenas com saída JSON:
$ php shucknt.php -f tokens-samples.txt -o json -j
[...]
{
"type": "NetNTLMv1 (ESS\/SSP)",
"description": "NetNTLMv1 (ESS\/SSP) type with C85086419358F950 as challenge",
"token": "ycam::ad:DEADC0DEDEADC0DE00000000000000000000000000000000:70C249F75FB6D2C0AC2C2D3808386CCAB1514A2095C582ED:1122334455667788",
"user": "ycam",
"domain": "ad",
"lmresp": "DEADC0DEDEADC0DE00000000000000000000000000000000",
"ntresp": "70C249F75FB6D2C0AC2C2D3808386CCAB1514A2095C582ED",
"ct1": "70C249F75FB6D2C0",
"ct2": "AC2C2D3808386CCA",
"ct3": "B1514A2095C582ED",
"ess": true,
"clientchallenge": "1122334455667788",
"serverchallenge": "DEADC0DEDEADC0DE",
"challenge": "C85086419358F950",
"deskeys": {
"k1": "93D9F1C5274F55BB",
"k2": "B9E599C1BBDD47C5",
"k3": "BD85C10101010101"
},
"nthash": "93B3C62269D55DB9CA660BBB91E2BD0B",
"pt1": "93B3C62269D55D",
"pt2": "B9CA660BBB91E2",
"pt3": "BD0B",
"reversePt3": "B0DB",
"HIBPcountCandidates": 12778,
"HIBPoccurence": 15,
"crackshToken": "$NETLM$C85086419358F950$70C249F75FB6D2C0AC2C2D3808386CCAB1514A2095C582ED (20-300$)",
"h4m14000": "echo \"70C249F75FB6D2C0:C85086419358F950\">14000.hash;echo \"AC2C2D3808386CCA:C85086419358F950\">>14000.hash;hashcat -m 14000 -a 3 -1 charsets\/DES_full.charset --hex-charset 14000.hash ?1?1?1?1?1?1?1?1",
"h4m5500": "echo \"ycam::ad::70C249F75FB6D2C0AC2C2D3808386CCAB1514A2095C582ED:C85086419358F950\">5500.hash;hashcat -m 5500 -a 3 5500.hash ?a?a?a?a?a --increment",
"h4m27000": "echo \"ycam::ad::70C249F75FB6D2C0AC2C2D3808386CCAB1514A2095C582ED:C85086419358F950\">27000.hash;hashcat -m 27000 -a 0 27000.hash nthash-wordlist.txt"
}
[...]
Aloje o ShuckNT num servidor web (Apache, Nginx, etc.) com suporte a PHP 7/8+:
O serviço online Shuck.sh, que implementa a ferramenta ShuckNT, fornece muitos detalhes e uma FAQ.
Um Gerador dinâmico e em tempo real está disponível online, permitindo, a partir de uma senha em texto claro ou de um hash NT, observar os mecanismos do algoritmo de geração de tokens de autenticação (NetNTLMv1(-ESS/SSP), MSCHAPv2, PPTP-VPN, etc.).
Por fim, um Conversor dinâmico e em tempo real também está disponível online, que permite, a partir de um token de autenticação (NetNTLMv1(-ESS/SSP), MSCHAPv2, PPTP-VPN, etc.), mostrar em detalhe a sua dissecação e até obter o hash NT correspondente se as chaves DES K1 e K2 forem fornecidas (após ataque DES-KPA, por exemplo).