Function at 0x423c77
Capabilities:
Encode data using xor

Disassembly:
push ebp
mov ebp, esp
sub esp, 0x640
mov eax, dword [0x44629c]
xor eax, ebp
push eax
call dword [sym.imp.KERNEL32.dll_SetFilePointer]
test eax, eax
je 0x423c85
lea ebx, [eax - 1]
cmp ebx, 0xffffffff
jne 0x423c85
mov ecx, dword [ebp - 0x30]
mov edx, dword [ebp - 8]
mov ecx, dword [ebp - 0xc]
mov dword fs:[0], ecx
pop ecx
xchg dword [esp], eax
jmp eax

Function at 0x4252be
Capabilities:
Check os version

Disassembly:
push ebp
mov ebp, esp
sub esp, 0x10
mov eax, dword [ebp + 8]
mov esi, dword [eax + 0x2c]
cmp esi, dword [edx + ecx*8]
jne 0x4252f6
mov eax, dword [ebp - 0x408]
add eax, 1
mov dword [ebp - 0x408], eax
mov dword [ebp - 0x42c], eax
mov dword [ebp - 0x40c], eax
mov dword [ebp - 0x424], eax
mov dword [ebp - 0x420], edx
xor ebx, ebx
mov dword [ebp - 4], ebx
mov bl, byte [edi]
mov byte [esi], bl
setne cl
add eax, eax
mov ecx, 2
push ecx
cmp dword [0x446308], 0
push ebx
test byte [edi + 8], 0x10
jne 0x425332
mov eax, dword [ebp - 0x1c]
mov cl, byte [eax + 0x41]
test cl, cl
je 0x425353
call dword [sym.imp.SHLWAPI.dll_PathRemoveBackslashW]
test eax, eax
jne 0x425309
mov ecx, dword [esi + 0x8c]
cmp ecx, ebx
jbe 0x42535a
cmp byte [esp + 0x13], bl
je 0x42535d
movzx eax, word [ebx + 4]
mov ecx, dword [ebp - 0xac]
mov byte [eax], 1
mov dword [ecx], 0
mov edi, dword [ebp - 8]
cmp edx, eax
jne 0x425332
mov edx, dword [ebp - 0xc]
lea eax, [ecx - 0x30]
cmp eax, 0xa
jae 0x42534a
mov eax, dword [esi]
call dword [eax + 0xb0]
test eax, eax
je 0x42535a
shl esi, 3
cmp edx, dword [esi + 0x446378]
jne 0x425391
mov eax, dword [ebp + 0xc]
mov esi, dword [ebp - 0x20]
sub ebx, edx
sub esi, 2
mov word [esi], cx
movzx edi, dl
lea ecx, [edi - 0xa]
cmp ecx, 0xe6
je 0x42538e
cmp eax, 0x4463c4
ja 0x425388
test ebx, ebx
je 0x425388
cmp edi, 0x138
jne 0x425394
push dword [esi + 8]
mov ecx, esi
mov dword [esp + 0x24], edi
call dword [sym.imp.KERNEL32.dll_GetVersionExA]
cmp eax, ebx
jne 0x4253d1
push dword [ebp + 0x14]
cmp edi, dword [ebp + 0x10]
jbe 0x4253a7
mov ecx, edi
mov eax, dword [edi]
call dword [eax + 0x58]
test eax, eax
je 0x4253ca
inc ecx
mov edi, ecx
test eax, eax
je 0x4253d6
mov ebx, dword [ebx + 0x20]
test ebx, ebx
je 0x425405
cmp dword [ebp - 4], ebx
jg 0x4253d8
mov ecx, dword [ebp + 0x10]
mov dword [ebp - 0x31c], ecx
mov dword [ebp - 0x314], eax
call dword [sym.imp.USER32.dll_GetClientRect]
push 0
push dword [0x4461e4]
call dword [sym.imp.USER32.dll_SetWindowLongA]
xor eax, eax
mov dword [ebp - 0x2c], edx
je 0x425405
mov edx, dword [eax + 0xc4]
jmp 0x425434
lea edx, [ebp - 0x84]
push edx
mov dword [ebp - 0xd4], ecx
cmp eax, ecx
jl 0x425434
mov edx, dword [esi]
mov ecx, edi
jb 0x42542e
pop esi
pop ebp
ret

Function at 0x426bc9
Capabilities:
Terminate process

Disassembly:
push ebp
mov ebp, esp
push 0xffffffffffffffff
push 0x4460c8
mov eax, dword fs:[0]
push eax
call dword [sym.imp.KERNEL32.dll_TerminateProcess]
mov ebx, eax
add esp, 4
test eax, eax
je 0x426bd3
xor eax, eax
mov ecx, dword [esi]
push eax
call fcn.0040ff91
inc edi
mov byte [ebp - 0x22f9], 0x20
mov ax, word [edi]
cmp ax, 0x25
je 0x426c31
lea eax, [ebp - 0x24]
push esi
push edi
push esi
dec eax
mov eax, 0xe001003a
pop ebp
ret