Function at 0x403b96
Capabilities:
Accept command line arguments
Check os version
Copy file
Delete file
Get common file path
Get file attributes
Get file system object information
Set current directory
Set environment variable
Shutdown system
Terminate process

Disassembly:
sub esp, 0x3ec
push ebx
push ebp
push esi
push edi
xor ebx, ebx
mov edi, 0x409de4
push 0x8001
mov dword [esp + 0x14], ebx
mov ebp, ebx
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
mov esi, dword [sym.imp.KERNEL32.dll_GetVersionExW]
lea eax, [esp + 0x2c]
xorps xmm0, xmm0
mov dword [esp + 0x40], ebx
push eax
movlpd qword [esp + 0x144], xmm0
mov dword [esp + 0x30], 0x11c
call esi
test eax, eax
jne 0x403c18
lea eax, [esp + 0x2c]
mov dword [esp + 0x2c], 0x114
push eax
call esi
push 0x53
pop eax
mov dl, 4
mov byte [esp + 0x146], dl
cmp word [esp + 0x40], ax
jne 0x403c14
mov eax, dword [esp + 0x5a]
add eax, 0xffffffd0
mov word [esp + 0x140], ax
jmp 0x403c1f
xor eax, eax
jmp 0x403c0a
mov dl, byte [esp + 0x146]
cmp dword [esp + 0x30], 0xa
jae 0x403c31
movzx eax, word [esp + 0x38]
mov dword [esp + 0x38], eax
jmp 0x403c35
mov eax, dword [esp + 0x38]
mov dword [0x46f638], eax
movzx eax, byte [esp + 0x30]
shl ax, 8
movzx ecx, ax
movzx eax, byte [esp + 0x34]
or ecx, eax
movzx eax, byte [esp + 0x140]
shl ax, 8
shl ecx, 0x10
movzx eax, ax
or ecx, eax
movzx eax, dl
or ecx, eax
mov eax, 0x600
mov dword [0x46f63c], ecx
sar ecx, 0x10
cmp cx, ax
je 0x403c8a
push ebx
call fcn.00407164
test eax, eax
je 0x403c8a
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.00406761
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
inc esi
add esi, eax
cmp byte [esi], bl
jne 0x403c8f
push 0xc
call fcn.00407164
push 0xa
call fcn.00407164
push 8
mov dword [0x467530], eax
call fcn.00407164
test eax, eax
je 0x403cd0
push 0x1e
call eax
test eax, eax
je 0x403cd0
or byte [0x46f63c], 0x80
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
push ebx
push 0x2b4
mov dword [0x46f5a0], eax
lea eax, [esp + 0x150]
push eax
push ebx
push 0x409e18
call dword [sym.imp.SHELL32.dll_SHGetFileInfoW]
push str.NSIS
push 0x467540
call fcn.00407398
call dword [sym.imp.KERNEL32.dll_GetCommandLineW]
push eax
mov esi, 0x4c0000
push esi
call fcn.00407398
movzx ecx, word [0x4c0000]
push 0x22
pop ebx
push 0x20
pop edx
cmp cx, bx
mov dword [0x467534], 0x400000
mov eax, ebx
mov dword [esp + 0x14], ebx
cmovne eax, edx
mov edx, 0x4c0002
movzx eax, ax
push eax
mov eax, esi
cmove eax, edx
push eax
call fcn.00406d4b
push eax
call dword [sym.imp.USER32.dll_CharNextW]
mov ecx, eax
mov ebx, ecx
mov dword [esp + 0x18], ebx
movzx eax, word [ecx]
test ax, ax
je 0x403e4b
mov esi, eax
push 0x20
pop edx
movzx eax, si
cmp si, dx
jne 0x403d87
add ecx, 2
movzx eax, word [ecx]
cmp ax, dx
je 0x403d7c
mov ebx, edx
movzx esi, ax
movzx edx, ax
cmp ax, word [esp + 0x14]
jne 0x403d9f
movzx edx, word [ecx + 2]
push 0x22
pop eax
mov ebx, eax
cmp si, word [esp + 0x14]
lea eax, [ecx + 2]
cmovne eax, ecx
cmp dx, 0x2f
jne 0x403e09
push 0x53
add eax, 2
pop ecx
push 0x20
pop edx
cmp word [eax], cx
jne 0x403dd6
movzx ecx, word [eax + 2]
cmp cx, dx
je 0x403dcc
test cx, cx
jne 0x403dd6
mov dword [0x46f620], 1
cmp dword [eax], 0x43004e
jne 0x403df8
cmp dword [eax + 4], 0x430052
jne 0x403df8
movzx ecx, word [eax + 8]
cmp cx, dx
je 0x403df5
test cx, cx
jne 0x403df8
or ebp, 4
cmp dword [eax - 4], 0x2f0020
jne 0x403e09
cmp dword [eax], 0x3d0044
je 0x403e33
push ebx
push eax
call fcn.00406d4b
mov ecx, eax
push 0x22
pop ebx
movzx eax, word [ecx]
mov edx, eax
cmp ax, bx
jne 0x403e25
add ecx, 2
movzx edx, word [ecx]
movzx esi, dx
test dx, dx
jne 0x403d71
jmp 0x403e47
xor ecx, ecx
mov word [eax - 4], cx
add eax, 4
push eax
push 0x4c4000
call fcn.00407398
mov ebx, dword [esp + 0x18]
mov esi, dword [sym.imp.KERNEL32.dll_GetTempPathW]
push 0x4d4000
push 0x2000
call esi
call fcn.004041a0
test eax, eax
jne 0x403ed1
push 0x1ffb
push 0x4d4000
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryW]
push str.Temp
push 0x4d4000
call sub.KERNEL32.dll_lstrcatW
call fcn.004041a0
test eax, eax
jne 0x403ed1
push 0x4d4000
push 0x1ffc
call esi
push 0x409e38
mov esi, 0x4d4000
push esi
call sub.KERNEL32.dll_lstrcatW
push esi
mov esi, dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableW]
push str.TEMP
call esi
push 0x4d4000
push 0x409e4c
call esi
call fcn.004041a0
test eax, eax
je 0x4040b9
push 0x4d0000
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
push ebp
call fcn.00403884
mov edi, eax
test edi, edi
jne 0x4040b9
cmp dword [0x46f544], eax
je 0x403f59
xor ebp, ebp
push ebp
push 0x4c0000
call fcn.00406d4b
mov esi, eax
mov eax, 0x4c0000
jmp 0x403f1e
cmp dword [esi], 0x5f0020
jne 0x403f1b
cmp dword [esi + 4], 0x3d003f
je 0x403f22
sub esi, 2
cmp esi, eax
jae 0x403f0a
mov edi, 0x409cb0
cmp esi, eax
jb 0x403f73
xor eax, eax
mov word [esi], ax
add esi, 8
push esi
call fcn.00406d8d
test eax, eax
je 0x404103
push esi
push 0x4c4000
call fcn.00407398
push esi
push 0x4c8000
call fcn.00407398
mov edi, ebp
or dword [0x46f62c], 0xffffffff
call fcn.00405fe5
push 1
mov ebx, eax
call fcn.00406e3d
jmp 0x4040bd
call fcn.00406ab9
push 0x4d4000
mov dword [esp + 0x1c], eax
call sub.KERNEL32.dll_lstrlenW
push ebx
push section..ndata
mov esi, eax
call fcn.00407398
cmp word [0x4c4000], bp
jne 0x403fab
push 0x4cc000
push 0x4c4000
call fcn.00407398
xor ebx, ebx
lea eax, [esi*2 + 0x4d4000]
inc ebx
mov dword [esp + 0x14], eax
mov esi, ebp
movzx ebp, bx
push ebp
push str.nsu_X.tmp
push eax
call dword [sym.imp.USER32.dll_wsprintfW]
mov eax, dword [0x46f550]
add esp, 0xc
push dword [eax + 0x120]
push 0x484000
call fcn.0040646b
cmp dword [esp + 0x18], 0
push 0x4d4000
je 0x403ff6
call fcn.00406410
jmp 0x403ffb
call fcn.004063f0
test eax, eax
je 0x404048
push 0x484000
call dword [sym.imp.KERNEL32.dll_GetFileAttributesW]
test eax, 0x400
jne 0x4040e1
push 0x484000
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
test eax, eax
je 0x4040e1
push 1
push 0x4d4000
call fcn.00406f3d
mov eax, esi
inc esi
test eax, eax
jne 0x4040e1
mov eax, dword [esp + 0x14]
jmp 0x403fbe
push 0x4d4000
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryW]
push 0
push 0x4d4000
call fcn.004067fa
push 1
push 0x484000
push 0x4dc000
call dword [sym.imp.KERNEL32.dll_CopyFileW]
test eax, eax
je 0x4040b9
push 0
push 0x484000
call fcn.004067fa
mov eax, dword [0x46f550]
push dword [eax + 0x124]
push 0x488000
call fcn.0040646b
push 0x488000
call fcn.00406efa
test eax, eax
jne 0x4040f4
mov eax, esi
inc esi
test eax, eax
jne 0x4040b9
push 0x484000
call fcn.00406d24
test eax, eax
je 0x40403f
mov ebx, dword [esp + 0x10]
xor ebp, ebp
call fcn.00403b6c
call dword [sym.imp.ole32.dll_OleUninitialize]
test edi, edi
je 0x404107
push 0x200010
push edi
call fcn.00407326
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
mov eax, dword [esp + 0x14]
inc ebx
push 0
pop ebp
test bx, bx
jne 0x403fb9
jmp 0x4040b9
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
xor ebp, ebp
mov edi, ebp
mov ebx, edi
jmp 0x4040bf
mov ebx, ebp
jmp 0x4040bd
cmp dword [0x46f614], 0
je 0x40418c
lea eax, [esp + 0x18]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call dword [sym.imp.ADVAPI32.dll_OpenProcessToken]
test eax, eax
je 0x40415c
lea eax, [esp + 0x20]
push eax
push str.SeShutdownPrivilege
push ebp
call dword [sym.imp.ADVAPI32.dll_LookupPrivilegeValueW]
push ebp
push ebp
push ebp
lea eax, [esp + 0x28]
mov dword [esp + 0x28], 1
push eax
push ebp
push dword [esp + 0x2c]
mov dword [esp + 0x40], 2
call dword [sym.imp.ADVAPI32.dll_AdjustTokenPrivileges]
push 4
call fcn.00407164
mov esi, 0x80040002
test eax, eax
je 0x404178
push esi
push 0x25
push ebp
push ebp
push ebp
call eax
test eax, eax
je 0x404185
push esi
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x40418c
push 9
call fcn.0040153b
cmp dword [0x46f62c], 0xffffffff
cmovne ebx, dword [0x46f62c]
push ebx
jmp 0x4040db