Function at 0x402500
Capabilities:
Encode data using xor
Get windows directory from kuser_shared_data
Resolve function by parsing pe exports

Disassembly:
sub esp, 0x448
push ebx
push esi
push edi
call fcn.00402980
xor eax, eax
push 0x100
push eax
mov dword [esp + 0x40], eax
mov dword [esp + 0x44], eax
mov dword [esp + 0x48], eax
mov dword [esp + 0x4c], eax
mov dword [esp + 0x50], eax
mov dword [esp + 0x54], eax
mov word [esp + 0x58], ax
lea eax, [esp + 0x5c]
push eax
call fcn.00403590
add esp, 0xc
xor edi, edi
xor eax, eax
mov byte [esp + eax + 0x54], al
inc eax
cmp eax, 0x100
jb 0x402544
xor esi, esi
mov dl, byte [esp + esi + 0x54]
mov eax, esi
and eax, 3
movzx ecx, dl
movzx eax, byte [eax + 0x41c020]
add eax, edi
add ecx, eax
movzx edi, cl
mov al, byte [esp + edi + 0x54]
mov byte [esp + esi + 0x54], al
inc esi
mov byte [esp + edi + 0x54], dl
cmp esi, 0x100
jb 0x402552
xor edi, edi
xor ebx, ebx
xor esi, esi
jmp 0x402590
lea eax, [edi + 1]
movzx edi, al
mov cl, byte [esp + edi + 0x54]
movzx edx, cl
lea eax, [ebx + edx]
movzx ebx, al
movzx eax, byte [esp + ebx + 0x54]
mov byte [esp + edi + 0x54], al
mov byte [esp + ebx + 0x54], cl
movzx eax, byte [esp + edi + 0x54]
add eax, edx
movzx eax, al
movzx eax, byte [esp + eax + 0x54]
xor al, byte [esi + 0x41c024]
mov byte [esp + esi + 0x38], al
inc esi
cmp esi, 0x1a
jb 0x402590
xor eax, eax
push 0x100
push eax
mov dword [esp + 0x14], eax
mov dword [esp + 0x18], eax
mov dword [esp + 0x1c], eax
mov dword [esp + 0x20], eax
mov dword [esp + 0x24], eax
mov byte [esp + 0x28], al
lea eax, [esp + 0x5c]
push eax
call fcn.00403590
add esp, 0xc
xor edi, edi
xor eax, eax
mov byte [esp + eax + 0x54], al
inc eax
cmp eax, 0x100
jb 0x402600
xor esi, esi
mov edi, edi
mov dl, byte [esp + esi + 0x54]
mov eax, esi
and eax, 3
movzx ecx, dl
movzx eax, byte [eax + 0x41c0a0]
add eax, edi
add ecx, eax
movzx edi, cl
mov al, byte [esp + edi + 0x54]
mov byte [esp + esi + 0x54], al
inc esi
mov byte [esp + edi + 0x54], dl
cmp esi, 0x100
jb 0x402610
xor edi, edi
xor ebx, ebx
xor esi, esi
lea eax, [edi + 1]
movzx edi, al
mov cl, byte [esp + edi + 0x54]
movzx edx, cl
lea eax, [edx + ebx]
movzx ebx, al
movzx eax, byte [esp + ebx + 0x54]
mov byte [esp + edi + 0x54], al
mov byte [esp + ebx + 0x54], cl
movzx eax, byte [esp + edi + 0x54]
add eax, edx
movzx eax, al
movzx eax, byte [esp + eax + 0x54]
xor al, byte [esi + 0x41c0a4]
mov byte [esp + esi + 0xc], al
inc esi
cmp esi, 0x15
jb 0x402645
xor edx, edx
lea ecx, [esp + 0x38]
call fcn.00402870
test eax, eax
je 0x40282f
mov esi, dword [eax + 0x18]
push ebp
call fcn.00402980
test esi, esi
je 0x4026d4
mov eax, dword [esi + 0x3c]
test eax, eax
je 0x4026d4
mov ecx, dword [eax + esi + 0x7c]
test ecx, ecx
je 0x4026d4
mov eax, dword [eax + esi + 0x78]
test eax, eax
je 0x4026d4
lea edx, [esp + 0x10]
push edx
push ecx
lea edx, [eax + esi]
mov ecx, esi
call fcn.00402e90
add esp, 8
mov ebp, eax
test ebp, ebp
jne 0x4026f3
mov eax, dword [0x815200]
test eax, eax
je 0x40282e
lea ecx, [esp + 0x10]
push ecx
push esi
call eax
mov ebp, eax
test ebp, ebp
je 0x40282e
xor eax, eax
push 0x100
push eax
mov dword [esp + 0x30], eax
mov dword [esp + 0x34], eax
mov dword [esp + 0x38], eax
mov dword [esp + 0x3c], eax
mov dword [esp + 0x40], eax
lea eax, [esp + 0x60]
push eax
call fcn.00403590
add esp, 0xc
xor edi, edi
xor eax, eax
mov byte [esp + eax + 0x58], al
inc eax
cmp eax, 0x100
jb 0x402720
xor esi, esi
mov edi, edi
mov dl, byte [esp + esi + 0x58]
mov eax, esi
and eax, 3
movzx ecx, dl
movzx eax, byte [eax + 0x41c060]
add eax, edi
add ecx, eax
movzx edi, cl
mov al, byte [esp + edi + 0x58]
mov byte [esp + esi + 0x58], al
inc esi
mov byte [esp + edi + 0x58], dl
cmp esi, 0x100
jb 0x402730
xor edi, edi
xor ebx, ebx
xor esi, esi
lea eax, [edi + 1]
movzx edi, al
mov cl, byte [esp + edi + 0x58]
movzx edx, cl
lea eax, [edx + ebx]
movzx ebx, al
movzx eax, byte [esp + ebx + 0x58]
mov byte [esp + edi + 0x58], al
mov byte [esp + ebx + 0x58], cl
movzx eax, byte [esp + edi + 0x58]
add eax, edx
movzx eax, al
movzx eax, byte [esp + eax + 0x58]
xor al, byte [esi + 0x41c064]
mov byte [esp + esi + 0x28], al
inc esi
cmp esi, 0x14
jb 0x402765
push 0x400
lea eax, [esp + 0x5c]
push 0
push eax
call fcn.00403590
mov ecx, 0x7ffe0030
add esp, 0xc
xor edx, edx
lea esi, [ecx + 2]
mov ax, word [ecx]
add ecx, 2
test ax, ax
jne 0x4027c2
sub ecx, esi
sar ecx, 1
je 0x40282e
add ecx, 0xb
cmp ecx, 0x200
ja 0x40282e
xor eax, eax
test ecx, ecx
je 0x402808
jmp 0x4027f0
movzx esi, word [edx + edx + 0x7ffe0030]
test si, si
je 0x402808
mov word [esp + edx*2 + 0x58], si
inc eax
inc edx
cmp eax, ecx
jb 0x4027f0
xor eax, eax
test ecx, ecx
je 0x402827
lea edx, [esp + edx*2 + 0x58]
movzx esi, word [esp + eax*2 + 0x28]
test si, si
je 0x402827
mov word [edx], si
inc eax
add edx, 2
cmp eax, ecx
jb 0x402812
lea eax, [esp + 0x58]
push eax
call ebp
pop ebp
pop edi
pop esi
pop ebx
add esp, 0x448
ret