Function at 0x18001df50
Capabilities:
Encode data using xor
Get thread local storage value
Hash data with crc32
Set thread local storage value

Disassembly:
mov qword [rsp + 8], rbx
mov qword [rsp + 0x10], rbp
push rsi
push rdi
push r12
sub rsp, 0x60
xor r12d, r12d
mov rsi, r8
mov rbp, rdx
mov rbx, rcx
lea r9d, [r12 + 4]
mov edx, 0x2a0
mov r8d, 0x3000
xor ecx, ecx
mov qword [rsp + 0x48], r12
mov dword [rsp + 0x58], 0x2a0
call qword [sym.imp.KERNEL32.dll_VirtualAlloc]
mov qword [rsp + 0x50], rax
test rax, rax
je 0x18001e1af
mov ecx, dword [0x18002dbb0]
call qword [sym.imp.KERNEL32.dll_TlsGetValue]
mov rdi, rax
test rax, rax
jne 0x18001dff4
mov qword [rsp + 0x30], r12
lea rcx, str..dcrypt
xor r9d, r9d
xor r8d, r8d
xor edx, edx
mov dword [rsp + 0x28], r12d
mov dword [rsp + 0x20], 3
call qword [sym.imp.KERNEL32.dll_CreateFileW]
mov rdi, rax
cmp rax, 0xffffffffffffffff
je 0x18001e037
mov ecx, dword [0x18002dbb0]
mov rdx, rax
call qword [sym.imp.KERNEL32.dll_TlsSetValue]
mov qword [rsp + 0x38], r12
lea rax, [rsp + 0x98]
lea r8, [rsp + 0x50]
mov qword [rsp + 0x30], rax
mov r9d, 0xc
mov edx, 0x2201f0
mov rcx, rdi
mov dword [rsp + 0x28], r12d
mov qword [rsp + 0x20], r12
call qword [sym.imp.KERNEL32.dll_DeviceIoControl]
test eax, eax
jne 0x18001e047
call qword [sym.imp.KERNEL32.dll_GetLastError]
test eax, eax
je 0x18001e047
mov rcx, qword [rsp + 0x50]
mov edx, 0x2a0
call qword [sym.imp.KERNEL32.dll_VirtualLock]
mov rdi, qword [rsp + 0x50]
test rdi, rdi
je 0x18001e1af
lea rcx, [rdi + 0x208]
nop dword [rax]
movzx eax, word [rbx]
add rcx, 2
add rbx, 2
mov word [rcx - 2], ax
test ax, ax
jne 0x18001e060
mov rcx, rdi
mov rdx, rbp
mov r8d, 0x104
call sub.msvcrt.dll_memcpy
movzx r11d, word [rsi]
mov ebx, 1
lea rcx, [rsp + 0x48]
mov edx, ebx
mov word [rdi + 0x29a], r11w
call sym.dcapi.dll_checker_dc_obtain_structure_info
cmp eax, ebx
je 0x18001e1b4
mov rsi, qword [rsp + 0x48]
or r8d, 0xffffffff
lea r10d, [rbx + 7]
lea r9, [rsi + 1]
lea r11, [0x180027090]
nop word [rax + rax]
movzx ecx, byte [r9 - 1]
movzx eax, r8b
shr r8d, 8
xor rcx, rax
add r9, 4
mov edx, dword [r11 + rcx*4]
movzx ecx, byte [r9 - 4]
xor edx, r8d
movzx eax, dl
shr edx, 8
xor rcx, rax
mov r8d, dword [r11 + rcx*4]
movzx ecx, byte [r9 - 3]
xor r8d, edx
movzx eax, r8b
shr r8d, 8
xor rcx, rax
mov edx, dword [r11 + rcx*4]
movzx ecx, byte [r9 - 2]
xor edx, r8d
movzx eax, dl
shr edx, 8
xor rcx, rax
mov r8d, dword [r11 + rcx*4]
xor r8d, edx
dec r10
jne 0x18001e0d0
mov ecx, dword [0x18002dbb0]
mov eax, 0x10624dd3
mul r8d
shr edx, 6
imul edx, edx, 0x3e8
sub r8d, edx
mov dword [rdi + 0x29c], r8d
call qword [sym.imp.KERNEL32.dll_TlsGetValue]
mov qword [rsp + 0x38], r12
mov rcx, rax
lea rax, [rsp + 0x40]
mov r9d, 0x2a0
mov qword [rsp + 0x30], rax
mov r8, rdi
mov edx, 0x2201c0
mov dword [rsp + 0x28], 0x2a0
mov qword [rsp + 0x20], rdi
call qword [sym.imp.KERNEL32.dll_DeviceIoControl]
mov ebp, eax
test rsi, rsi
je 0x18001e19b
mov rcx, rsi
call qword [sym.imp.msvcrt.dll_free]
test ebp, ebp
je 0x18001e1a5
mov ebx, dword [rdi + 0x28e]
mov rcx, rdi
call sym.dcapi.dll_secure_free
jmp 0x18001e1b4
mov ebx, 9
lea r11, [rsp + 0x60]
mov eax, ebx
mov rbx, qword [r11 + 0x20]
mov rbp, qword [r11 + 0x28]
mov rsp, r11
pop r12
pop rdi
pop rsi
ret