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/* Benjamin DELPY `gentilkiwi`
http://blog.gentilkiwi.com
benjamin@gentilkiwi.com
Licence : http://creativecommons.org/licenses/by/3.0/fr/
*/
#include "mod_mimikatz_efs.h"
#include "..\global.h"
vector<KIWI_MIMIKATZ_LOCAL_MODULE_COMMAND> mod_mimikatz_efs::getMimiKatzCommands()
{
vector<KIWI_MIMIKATZ_LOCAL_MODULE_COMMAND> monVector;
monVector.push_back(KIWI_MIMIKATZ_LOCAL_MODULE_COMMAND(infos, L"infos", L"Affiche des informations basiques sur un fichier chiffré"));
monVector.push_back(KIWI_MIMIKATZ_LOCAL_MODULE_COMMAND(full, L"full", L"Affiche des informations très détaillées sur un fichier chiffré"));
monVector.push_back(KIWI_MIMIKATZ_LOCAL_MODULE_COMMAND(toraw, L"toraw", L"Dump les données EFS d'un fichier chiffré vers un fichier brut"));
// monVector.push_back(KIWI_MIMIKATZ_LOCAL_MODULE_COMMAND(fromraw, L"fromraw"));
return monVector;
}
bool mod_mimikatz_efs::infos(vector<wstring> * arguments)
{
if(!arguments->empty())
{
PENCRYPTION_CERTIFICATE_HASH_LIST pHashes = NULL;
if(QueryUsersOnEncryptedFile(arguments->front().c_str(), &pHashes) == ERROR_SUCCESS)
{
(*outputStream) << L"Utilisateur(s) déclaré(s) : " << pHashes->nCert_Hash << endl;
printInfos(pHashes);
FreeEncryptionCertificateHashList(pHashes);
}
else (*outputStream) << L"Erreur QueryUsersOnEncryptedFile : " << mod_system::getWinError() << endl;
if(QueryRecoveryAgentsOnEncryptedFile(arguments->front().c_str(), &pHashes) == ERROR_SUCCESS)
{
(*outputStream) << L"Agent(s) de recouvrement : " << pHashes->nCert_Hash << endl;
printInfos(pHashes);
FreeEncryptionCertificateHashList(pHashes);
}
else (*outputStream) << L"Erreur QueryRecoveryAgentsOnEncryptedFile : " << mod_system::getWinError() << endl;
}
return true;
}
bool mod_mimikatz_efs::full(vector<wstring> * arguments)
{
if(!arguments->empty())
{
PVOID pvContext = NULL;
if(OpenEncryptedFileRaw(arguments->front().c_str(), 0, &pvContext) == ERROR_SUCCESS)
{
SIMPLE_BYTE_ARRAY sba = {0, reinterpret_cast<BYTE *>(malloc(0))};
if(ReadEncryptedFileRaw(ExportToArrayCallback, &sba, pvContext) == ERROR_SUCCESS)
{
PEFS_FEK Fek = NULL;
PEFS_STREAM_DATA_SEGMENT monDataSegment = NULL;
for(
PEFS_MARSHALED_STREAM monMarshaledStream = reinterpret_cast<PEFS_MARSHALED_STREAM>(sba.tableau + sizeof(EFS_RAW));
reinterpret_cast<PBYTE>(monMarshaledStream) < (sba.tableau + sba.nbElements);
monMarshaledStream = reinterpret_cast<PEFS_MARSHALED_STREAM>(monDataSegment)
)
{
bool isEFSMetaData = (monMarshaledStream->NameLenght == 2) && (monMarshaledStream->StreamName[0] == 0x1910);
(*outputStream) << endl <<
L"Marshaled Stream :" << endl <<
L" * Taille : " << monMarshaledStream->Length << endl <<
L" * Flag : " << monMarshaledStream->Flag << endl <<
L" * Nom : " << (isEFSMetaData ? wstring(L"(EFS Metadata stream)") : wstring(monMarshaledStream->StreamName, monMarshaledStream->NameLenght / sizeof(wchar_t))) << endl <<
L" * Type : " << (isEFSMetaData ? L"EFS Metadata" : L"DATA") << endl <<
endl;
for(
monDataSegment = reinterpret_cast<PEFS_STREAM_DATA_SEGMENT>(reinterpret_cast<PBYTE>(monMarshaledStream) + monMarshaledStream->Length);
(reinterpret_cast<PBYTE>(monDataSegment) < (sba.tableau + sba.nbElements)) && (monDataSegment->GURE0 == 0x00550047) && (monDataSegment->GURE1 == 0x00450052);
monDataSegment = reinterpret_cast<PEFS_STREAM_DATA_SEGMENT>(reinterpret_cast<PBYTE>(monDataSegment) + monDataSegment->Length)
)
{
(*outputStream) << L"DataSegment : " << endl;
PBYTE StreamData = reinterpret_cast<PBYTE>(monDataSegment) + sizeof(EFS_STREAM_DATA_SEGMENT);
if(isEFSMetaData)
{
(*outputStream) << L" EFS Metadata :" << endl;
PEFS_METADATA_1 mesAttr = reinterpret_cast<PEFS_METADATA_1>(StreamData);
(*outputStream) << L" * Version EFS : " << mesAttr->EFS_Version << endl;
if(mesAttr->DDF_Offset)
{
(*outputStream) << L" * Utilisateur(s) déclaré(s) :" << endl;
fullInfosFromEFS_KEY_LIST(mesAttr, mesAttr->DDF_Offset, &Fek);
}
if(mesAttr->DRF_Offset)
{
(*outputStream) << L" * Agent(s) de recouvrement :" << endl;
fullInfosFromEFS_KEY_LIST(mesAttr, mesAttr->DRF_Offset, &Fek);
}
}
else
{
(*outputStream) << L" DATA :" << endl;
if(!monMarshaledStream->Flag)
{
(*outputStream) << L" DATA Segment Encryption Header :" << endl;
PEFS_STREAM_DATA_SEGMENT_ENCRYPTION_HEADER monSegEncHead = reinterpret_cast<PEFS_STREAM_DATA_SEGMENT_ENCRYPTION_HEADER>(StreamData);
(*outputStream) <<
L" * Length : " << monSegEncHead->Length << endl <<
L" * StartingFile_Offset : " << monSegEncHead->StartingFile_Offset << endl <<
L" * BytesWithinStreamSize : " << monSegEncHead->BytesWithinStreamSize << endl <<
L" * BytesWithinVDL : " << monSegEncHead->BytesWithinVDL << endl <<
L" * DataUnitShift : " << monSegEncHead->DataUnitShift << endl <<
L" * ChunkShift : " << monSegEncHead->ChunkShift << endl <<
L" * ClusterShift : " << monSegEncHead->ClusterShift << endl <<
L" * NumberOfDataBlocks : " << monSegEncHead->NumberOfDataBlocks << endl <<
endl;
PEFS_EXTENDED_HEADER monExtHeader = reinterpret_cast<PEFS_EXTENDED_HEADER>(reinterpret_cast<PBYTE>(monSegEncHead) + FIELD_OFFSET(EFS_STREAM_DATA_SEGMENT_ENCRYPTION_HEADER, DataBlockSizes) + (sizeof(DWORD) * monSegEncHead->NumberOfDataBlocks));
if(monExtHeader->EXTD_Number == 'DTXE')
{
(*outputStream) << L" * Extended Header Flag : " << monExtHeader->Flags << endl;
}
for(DWORD block = 0; block < monSegEncHead->NumberOfDataBlocks; block++)
{
(*outputStream) << L" -> Block " << block+1 << L" ; taille : " << monSegEncHead->DataBlockSizes[block] << endl;
PBYTE mesDatas = reinterpret_cast<PBYTE>(StreamData) + monSegEncHead->Length;
(*outputStream) << mod_text::stringOfHex(mesDatas, monSegEncHead->DataBlockSizes[block], 16) << endl;
if(Fek);
}
}
else
{
(*outputStream) << L"TODO Data" << endl;
}
}
}
}
}
else (*outputStream) << L"Erreur ReadEncryptedFileRaw : " << mod_system::getWinError() << endl;
free(sba.tableau);
CloseEncryptedFileRaw(pvContext);
}
else (*outputStream) << L"Erreur OpenEncryptedFileRaw : " << mod_system::getWinError() << endl;
}
return true;
}
bool mod_mimikatz_efs::toraw(vector<wstring> * arguments)
{
if(arguments->size() == 2)
{
PVOID pvContext = NULL;
(*outputStream) << L"Ouverture de : " << arguments->front() << endl;
if(OpenEncryptedFileRaw(arguments->front().c_str(), 0, &pvContext) == ERROR_SUCCESS)
{
(*outputStream) << L"Vers : " << arguments->back() << endl;
HANDLE hFile = CreateFile(arguments->back().c_str(), GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, 0, NULL);
if(ReadEncryptedFileRaw(ExportToFileCallback, &hFile, pvContext) == ERROR_SUCCESS)
{
(*outputStream) << L" * Export OK" << endl;
}
else (*outputStream) << L"* Erreur ReadEncryptedFileRaw : " << mod_system::getWinError() << endl;
CloseHandle(hFile);
CloseEncryptedFileRaw(pvContext);
}
else (*outputStream) << L"Erreur OpenEncryptedFileRaw : " << mod_system::getWinError() << endl;
}
return true;
}
void mod_mimikatz_efs::printInfos(PENCRYPTION_CERTIFICATE_HASH_LIST hashList)
{
for(DWORD i = 0; i < hashList->nCert_Hash; i++)
{
wstring user;
mod_secacl::simpleSidToString(hashList->pUsers[i]->pUserSid, &user);
(*outputStream) <<
L" * Nom : " << user << endl <<
L" * Nom simple : " << hashList->pUsers[i]->lpDisplayInformation << endl <<
L" * Hash du certificat : " << mod_text::stringOfHex(hashList->pUsers[i]->pHash->pbData, hashList->pUsers[i]->pHash->cbData) << endl <<
endl;
}
}
DWORD WINAPI mod_mimikatz_efs::ExportToArrayCallback(PBYTE pbData, PVOID pvCallbackContext, DWORD ulLength)
{
if(ulLength)
{
PSIMPLE_BYTE_ARRAY sba = reinterpret_cast<PSIMPLE_BYTE_ARRAY>(pvCallbackContext);
sba->tableau = reinterpret_cast<PBYTE>(realloc(sba->tableau, sba->nbElements + ulLength));
if(sba->tableau)
{
RtlCopyMemory(sba->tableau + sba->nbElements, pbData, ulLength);
sba->nbElements += ulLength;
}
else
return ERROR_NOT_ENOUGH_MEMORY;
}
return ERROR_SUCCESS;
}
DWORD WINAPI mod_mimikatz_efs::ExportToFileCallback(PBYTE pbData, PVOID pvCallbackContext, ULONG ulLength)
{
if(ulLength)
{
(*outputStream) << L" - Lecture d\'un bloc de : " << ulLength << endl;
DWORD dwBytesWritten = 0;
if(WriteFile(*reinterpret_cast<PHANDLE>(pvCallbackContext), pbData, ulLength, &dwBytesWritten, NULL) && (ulLength == dwBytesWritten))
return ERROR_SUCCESS;
return GetLastError();
}
return ERROR_SUCCESS;
}
bool mod_mimikatz_efs::fullInfosFromEFS_KEY_LIST(PEFS_METADATA_1 header, LONG KeyList_offset, PEFS_FEK * pFek)
{
*pFek = NULL;
PEFS_KEY_LIST monHead = reinterpret_cast<PEFS_KEY_LIST>(reinterpret_cast<PBYTE>(header) + KeyList_offset);
PEFS_KEY_LIST_ENTRY monHeader = reinterpret_cast<PEFS_KEY_LIST_ENTRY>(monHead);
DWORD previousSize = sizeof(PEFS_KEY_LIST);
for(DWORD i = 0; i < monHead->Length; i++)
{
(*outputStream) << endl << L" Champ de données " << (i + 1) << L" :" << endl;
monHeader = reinterpret_cast<PEFS_KEY_LIST_ENTRY>((PBYTE) monHeader + previousSize);
PEFS_PUBLIC_KEY_INFORMATION monCredHeader = reinterpret_cast<PEFS_PUBLIC_KEY_INFORMATION>(reinterpret_cast<PBYTE>(monHeader) + monHeader->PKI_Offset);
wstring user;
if(monCredHeader->OwnerSID_offset)
mod_secacl::simpleSidToString((reinterpret_cast<PBYTE>(monCredHeader) + monCredHeader->OwnerSID_offset), &user);
else user.assign(L"(null)");
(*outputStream) << L" * Utilisateur : " << user << endl;
fullInfosFromEFS_CERTIFICATE_DATA(monCredHeader, monCredHeader->Certificate_offset);
PBYTE Encrypted_FEK = reinterpret_cast<PBYTE>(monHeader) + monHeader->Enc_FEK_Offset;
(*outputStream) <<
L" * Flags : " << monHeader->Flags << endl <<
L" * FEK (chiffrée) : " << endl <<
L" -> Taille : " << monHeader->Enc_FEK_Length << endl <<
L" -> Données : " << endl << mod_text::stringOfHex(Encrypted_FEK, monHeader->Enc_FEK_Length, 16) << endl <<
endl;
/*HCRYPTPROV hCryptKeyProv;
if(CryptAcquireContext(&hCryptKeyProv, L"", MS_STRONG_PROV, PROV_RSA_FULL, NULL ))
{
HCRYPTKEY maCle = NULL;
if(CryptGetUserKey(hCryptKeyProv, AT_KEYEXCHANGE, &maCle))
{
DWORD taille = monHeader->Enc_FEK_Length;
if (CryptDecrypt(maCle, 0, TRUE, 0, Encrypted_FEK, &taille) )
{
*pFek = reinterpret_cast<PEFS_FEK>(Encrypted_FEK);
(*outputStream) <<
L" * FEK (clair) : " << endl <<
L" -> Taille : " << (*pFek)->Key_Lenght << endl <<
L" -> Algorithme : " << (*pFek)->Algorithm << endl <<
L" -> Entropie : " << (*pFek)->Entropy << endl <<
L" -> Données : " << endl << mod_text::stringOfHex((*pFek)->Key, (*pFek)->Key_Lenght, 16) << endl <<
endl;
}
else
(*outputStream) << mod_system::getWinError() << endl;
}
CryptReleaseContext(hCryptKeyProv, 0);
}*/
previousSize = monHeader->Length;
}
return (*pFek != NULL);
}
void mod_mimikatz_efs::fullInfosFromEFS_CERTIFICATE_DATA(PEFS_PUBLIC_KEY_INFORMATION header, LONG Certificate_offset)
{
PEFS_CERTIFICATE_DATA monThCertificate = reinterpret_cast<PEFS_CERTIFICATE_DATA>(reinterpret_cast<PBYTE>(header) + header->Certificate_offset);
(*outputStream) << L" -> Nom affiché : ";
if(monThCertificate->DisplayName_Offset)
(*outputStream) << reinterpret_cast<wchar_t *>(reinterpret_cast<PBYTE>(monThCertificate) + monThCertificate->DisplayName_Offset);
(*outputStream) << endl;
(*outputStream) << L" -> Provider : ";
if(monThCertificate->ProviderName_Offset)
(*outputStream) << reinterpret_cast<wchar_t *>(reinterpret_cast<PBYTE>(monThCertificate) + monThCertificate->ProviderName_Offset);
(*outputStream) << endl;
(*outputStream) << L" -> Container : ";
if(monThCertificate->ContainerName_Offset)
(*outputStream) << reinterpret_cast<wchar_t *>(reinterpret_cast<PBYTE>(monThCertificate) + monThCertificate->ContainerName_Offset);
(*outputStream) << endl;
(*outputStream) << L" -> Empreinte : " << mod_text::stringOfHex(reinterpret_cast<PBYTE>(monThCertificate) + monThCertificate->CertificateThumbprint, monThCertificate->CertificateThumbprint_Length) << endl;
}
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