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| #include "Header/BaseHeader.h"
#ifdef _WIN64
#pragma comment(linker,"/INCLUDE:_tls_used")
#else
#pragma comment(linker,"/INCLUDE:__tls_used")
#endif
void NTAPI TLS_CALLBACK1(PVOID DllHandle, DWORD dwReason, PVOID Reserved);
extern "C"
#ifdef _WIN64
#pragma const_seg(".CRT$XLX")
const
#else
#pragma data_seg(".CRT$XLX")
#endif
PIMAGE_TLS_CALLBACK pTLS_CALLBACKs[] = { TLS_CALLBACK1, nullptr };
#pragma data_seg()
char key[] = "HELLO_TLS";
DWORD KeyLen;
BYTE ans[] = {
0x13, 0x73, 0x1b, 0xe0, 0x1a, 0x73, 0xe9, 0x34, 0x26, 0x90, 0xe1, 0xf4, 0x72, 0xeb, 0x8c, 0xbf, 0xee, 0x33, 0xa9,
0xf1, 0x9b, 0xc4, 0x8b, 0x88, 0x78, 0xbe, 0xd2, 0xc6, 0x7, 0x97, 0x85, 0x5a,
};
char flag[MAX_PATH];
DWORD sha(char* Data,DWORD DataLen) {
DWORD HASH = 0x534c54;
for (int i = 0; i < DataLen; i++) HASH = HASH *31 + (BYTE)Data[i];
return HASH;
}
void HelloTLS() {
puts("WELCOME TO TLS'S W");
puts("Here you can learn about the process of TLS");
puts("Start enjoying the challenges of TLS");
puts("");
puts("FLAG:");
scanf("%s", flag);
}
void InitBox(char* BOX) {
int i, j = 0;
for (i = 0; i < 256; i++) BOX[i] = key[i % KeyLen];
for (i = 0; i < 256; i++) {
j = (j + BOX[i] + key[i % KeyLen]) % 256;
char temp = BOX[i];
BOX[i] = BOX[j];
BOX[j] = temp;
}
}
DWORD Rc4(char* flag) {
char BOX[256];
int i , j = 0;
KeyLen = strlen(key);
InitBox(BOX);
for (i = 0; i < strlen(flag); i++) {
i = (i + 1) % 256;
j = (j + BOX[i]) % 256;
BOX[i] = BOX[j];
BOX[j] = key[i%KeyLen];
flag[i] ^= BOX[key[i%KeyLen] & 0xff];
}
return sha(BOX,256);
}
DWORD Rc4_FAKE(char* flag) {
char BOX[256];
int i, j = 0;
KeyLen = strlen(key);
InitBox(BOX);
for (i = 0; i < strlen(flag); i++) {
i = (i + 1) % 256;
j = (j + BOX[i]) % 256;
BYTE temp = BOX[i];
BOX[i] = BOX[j];
BOX[j] = temp;
flag[i] ^= BOX[(BOX[i] + BOX[j]) % 256];
}
return sha(BOX,256);
}
void TEA(char* flag,DWORD KEY) {
for (int j = 0; j < strlen(flag)/4; j+=2) {
DWORD* v = (DWORD*)flag;
DWORD v0=v[j], v1=v[j+1], sum=0, i;
DWORD delta=0x9e3779b9;
BYTE* k = (BYTE*)(&KEY);
BYTE k0=k[0], k1=k[1], k2=k[2], k3=k[3];
for (i=0; i < 32; i++) {
sum += delta;
v0 += ((v1<<4) + k0) ^ (v1 + sum) ^ ((v1>>5) + k1);
v1 += ((v0<<4) + k2) ^ (v0 + sum) ^ ((v0>>5) + k3);
}
v[j]=v0; v[j+1]=v1;
}
}
void Check_HASH(char* flag) {
DWORD ANS = sha(flag,strlen(flag));
switch (ANS) {
case 0x68e19b96:
case 0x534c54:
puts("FFFAAAKKKEEE");
break;
case 0x78909b38:
puts("YYYYEEEESSSS");
default:
ExitProcess(0);
}
}
void Check(char* flag) {
for (int i = 0; i < strlen(flag); i++) {
if ((BYTE)flag[i] != ans[i]) {
ExitProcess(0);
}
}
puts("YYYYEEEESSSS");
}
void ENCRYPT(char* flag) {
DWORD TMP = Rc4(flag);
TEA(flag, TMP);
}
void ENCRYPT_FAKE(char* flag) {
DWORD TMP = Rc4_FAKE(flag);
TEA(flag, TMP);
}
void EZ_ENCRYPT(char* flag) {
for (DWORD i = 0; i < strlen(flag); i++) flag[i] ^= 0x66;
}
void (*HELLO)() = nullptr;
void (*tENCRYPT)(char*flag) = nullptr;
void (*tCheck)(char*flag) = nullptr;
void (*Function_Change[])(char*flag) = {ENCRYPT,ENCRYPT_FAKE,nullptr};
DWORD co = 0;
void NTAPI TLS_CALLBACK1(PVOID DllHandle, DWORD dwReason, PVOID Reserved){
switch (dwReason) {
case 0:
TerminateProcess(GetCurrentProcess(), 0);
break;
case 1:
break;
case 2:
if (co)tCheck = Check;
tENCRYPT = Function_Change[PEB_Anti_Debug()];
co = 1;
break;
case 3:
tENCRYPT = EZ_ENCRYPT;
tCheck = Check_HASH;
break;
default:
TerminateProcess(GetCurrentProcess(), 0);
}
}
void Thread_tENCRYPT(char *param) {
tENCRYPT(param);
}
void Thread_tCheck(char *param) {
tCheck(param);
}
int main() {
if (!HELLO) HELLO = HelloTLS;
HELLO();
if (!tENCRYPT) tENCRYPT = EZ_ENCRYPT;
HANDLE hThread = CreateThread(nullptr, NULL, (LPTHREAD_START_ROUTINE)Thread_tENCRYPT, flag, NULL, nullptr);
WaitForSingleObject(hThread, INFINITE);
CloseHandle(hThread);
if (!tCheck) tCheck = Check_HASH;
hThread = CreateThread(nullptr, NULL, (LPTHREAD_START_ROUTINE)Thread_tCheck, flag, NULL, nullptr);
WaitForSingleObject(hThread, INFINITE);
CloseHandle(hThread);
puts("BYTE BYTE");
TerminateProcess(GetCurrentProcess(), 0);
}
|