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Add check for WAET ACPI table presence #284

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Merged
ayoubfaouzi merged 1 commit into from
Apr 1, 2025
Merged

Add check for WAET ACPI table presence #284

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1 change: 1 addition & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -214,6 +214,7 @@ Please, if you encounter any of the anti-analysis tricks which you have seen in
- SMBIOS string checks (VMWare)
- SMBIOS string checks (Qemu)
- SMBIOS number of tables (Qemu, VirtualBox)
- ACPI string checks (WAET table)
- ACPI string checks (VirtualBox)
- ACPI string checks (VMWare)
- ACPI string checks (Qemu)
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1 change: 1 addition & 0 deletions al-khaser/Al-khaser.cpp
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Expand Up @@ -214,6 +214,7 @@ int main(int argc, char* argv[])
exec_check(&registry_services_disk_enum, TEXT("Checking Services\\Disk\\Enum entries for VM strings "));
exec_check(&registry_disk_enum, TEXT("Checking Enum\\IDE and Enum\\SCSI entries for VM strings "));
exec_check(&number_SMBIOS_tables, TEXT("Checking SMBIOS tables "));
exec_check(&firmware_ACPI_WAET, TEXT("Checking if ACPI WAET table is present "));
}

/* VirtualBox Detection */
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50 changes: 50 additions & 0 deletions al-khaser/AntiVM/Generic.cpp
100755 → 100644
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Expand Up @@ -2044,3 +2044,53 @@ BOOL number_SMBIOS_tables()
}
return result;
}

/*
Check for Windows ACPI Emulated devices Table (WAET)
https://download.microsoft.com/download/7/E/7/7E7662CF-CBEA-470B-A97E-CE7CE0D98DC2/WAET.docx
*/
BOOL firmware_ACPI_WAET()
{
BOOL result = FALSE;

PDWORD tableNames = static_cast<PDWORD>(malloc(4096));

if (tableNames) {
SecureZeroMemory(tableNames, 4096);
DWORD tableSize = enum_system_firmware_tables(static_cast<DWORD>('ACPI'), tableNames, 4096);

// API not available
if (tableSize == -1)
return FALSE;

DWORD tableCount = tableSize / 4;
if (tableSize < 4 || tableCount == 0)
{
result = TRUE;
}
else
{
for (DWORD i = 0; i < tableCount; i++)
{
DWORD tableSize = 0;
PBYTE table = get_system_firmware(static_cast<DWORD>('ACPI'), tableNames[i], &tableSize);

if (table) {

PBYTE waetString = (PBYTE)"WAET";
size_t StringLen = 4;

if (find_str_in_data(waetString, StringLen, table, tableSize))
{
result = TRUE;
}

free(table);
}
}
}

free(tableNames);
}
return result;
}
3 changes: 2 additions & 1 deletion al-khaser/AntiVM/Generic.h
100755 → 100644
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Expand Up @@ -49,4 +49,5 @@ BOOL cim_voltagesensor_wmi();
BOOL pirated_windows();
BOOL registry_services_disk_enum();
BOOL registry_disk_enum();
BOOL number_SMBIOS_tables();
BOOL number_SMBIOS_tables();
BOOL firmware_ACPI_WAET();