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Function to read HV vendor information, added to logging

This commit is contained in:
Alberto Ortega 2016-03-02 20:27:03 +01:00
parent a6a0478915
commit 6264d96ca2
3 changed files with 33 additions and 6 deletions
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22
pafish/cpu.c
View File

@ -31,7 +31,7 @@ static inline unsigned long long rdtsc_diff_vmexit() {
}
static inline void cpuid_vendor_00(char * vendor) {
int ebx, ecx, edx;
int ebx = 0, ecx = 0, edx = 0;
__asm__ volatile("cpuid" \
: "=b"(ebx), \
@ -44,8 +44,22 @@ static inline void cpuid_vendor_00(char * vendor) {
vendor[12] = 0x00;
}
static inline void cpuid_hv_vendor_00(char * vendor) {
int ebx = 0, ecx = 0, edx = 0;
__asm__ volatile("cpuid" \
: "=b"(ebx), \
"=c"(ecx), \
"=d"(edx) \
: "a"(0x40000000));
sprintf(vendor , "%c%c%c%c", ebx, (ebx >> 8), (ebx >> 16), (ebx >> 24));
sprintf(vendor+4, "%c%c%c%c", ecx, (ecx >> 8), (ecx >> 16), (ecx >> 24));
sprintf(vendor+8, "%c%c%c%c", edx, (edx >> 8), (edx >> 16), (edx >> 24));
vendor[12] = 0x00;
}
static inline void cpuid_brand(char * brand, uint32_t eax_value) {
int eax, ebx, ecx, edx;
int eax = 0, ebx = 0, ecx = 0, edx = 0;
__asm__ volatile("cpuid" \
: "=a"(eax), \
@ -97,6 +111,10 @@ void cpu_write_vendor(char * vendor) {
cpuid_vendor_00(vendor);
}
void cpu_write_hv_vendor(char * vendor) {
cpuid_hv_vendor_00(vendor);
}
void cpu_write_brand(char * brand) {
int eax;
/* Check if Processor Brand String is supported */

1
pafish/cpu.h
View File

@ -9,6 +9,7 @@ int cpu_rdtsc_force_vmexit();
int cpu_hv();
void cpu_write_vendor(char *);
void cpu_write_hv_vendor(char *);
void cpu_write_brand(char *);
int cpu_known_vm_vendors();

16
pafish/main.c
View File

@ -40,7 +40,7 @@
int main(void)
{
char winverstr[32], aux[1024];
char cpu_vendor[13], cpu_brand[49];
char cpu_vendor[13], cpu_hv_vendor[13], cpu_brand[49];
OSVERSIONINFO winver;
unsigned short original_colors = 0;
@ -60,15 +60,23 @@ int main(void)
/* Get CPU vendor */
cpu_write_vendor(cpu_vendor);
cpu_write_hv_vendor(cpu_hv_vendor);
cpu_write_brand(cpu_brand);
printf("[*] Windows version: %s\n", winverstr);
printf("[*] CPU: %s %s \n", cpu_vendor, cpu_brand);
printf("[*] CPU: %s\n", cpu_vendor);
if (strlen(cpu_hv_vendor))
printf(" Hypervisor: %s\n", cpu_hv_vendor);
printf(" CPU brand: %s\n", cpu_brand);
snprintf(aux, sizeof(aux) - sizeof(aux[0]), "Windows version: %s",
winverstr);
write_log(aux);
snprintf(aux, sizeof(aux) - sizeof(aux[0]), "CPU: %s %s", cpu_vendor,
cpu_brand);
if (strlen(cpu_hv_vendor))
snprintf(aux, sizeof(aux) - sizeof(aux[0]), "CPU: %s (HV: %s) %s", cpu_vendor,
cpu_hv_vendor, cpu_brand);
else
snprintf(aux, sizeof(aux) - sizeof(aux[0]), "CPU: %s %s", cpu_vendor,
cpu_brand);
write_log(aux);
/* Debuggers detection tricks */