Function at 0x4039a0
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, 0x3f8
push ebp
push esi
push edi
push 0x20
pop edi
xor ebp, ebp
push 0x8001
mov dword [esp + 0x20], ebp
mov dword [esp + 0x18], str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
mov dword [esp + 0x10], ebp
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
mov esi, dword [sym.imp.KERNEL32.dll_GetVersionExW]
lea eax, [esp + 0x34]
push eax
mov dword [esp + 0x4c], ebp
mov dword [esp + 0x14c], ebp
mov dword [esp + 0x150], ebp
mov dword [esp + 0x38], 0x11c
call esi
test eax, eax
jne 0x403a2c
lea eax, [esp + 0x34]
mov dword [esp + 0x34], 0x114
push eax
call esi
mov ax, word [esp + 0x48]
mov ecx, dword [esp + 0x62]
sub ax, 0x53
add ecx, 0xffffffd0
neg ax
sbb eax, eax
mov byte [esp + 0x14e], 4
not eax
and eax, ecx
mov word [esp + 0x148], ax
cmp dword [esp + 0x38], 0xa
jae 0x403a39
and word [esp + 0x42], 0
mov eax, dword [esp + 0x40]
movzx ecx, byte [esp + 0x3c]
mov dword [0x42c478], eax
xor eax, eax
mov ah, byte [esp + 0x38]
movzx eax, ax
or eax, ecx
xor ecx, ecx
mov ch, byte [esp + 0x148]
movzx ecx, cx
shl eax, 0x10
or eax, ecx
movzx ecx, byte [esp + 0x14e]
or eax, ecx
mov dword [0x42c47c], eax
cmp word [0x42c47e], 0x600
je 0x403a8e
push ebp
call fcn.0040713a
cmp eax, ebp
je 0x403a8e
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.004070ca
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea esi, [esi + eax + 1]
cmp byte [esi], 0
jne 0x403a93
push 0xc
call fcn.0040713a
push 0xa
call fcn.0040713a
push 8
mov dword [0x42c3c4], eax
call fcn.0040713a
cmp eax, ebp
je 0x403ad6
push 0x1e
call eax
test eax, eax
je 0x403ad6
or byte [0x42c47c], 0x80
push ebx
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebp
call dword [sym.imp.ole32.dll_OleInitialize]
mov dword [0x42c480], eax
push ebp
lea eax, [esp + 0x158]
push 0x2b4
push eax
push ebp
push 0x422058
call dword [sym.imp.SHELL32.dll_SHGetFileInfoW]
push str.NSIS_Error
push 0x42b3c0
call fcn.00406af8
call dword [sym.imp.KERNEL32.dll_GetCommandLineW]
mov ebx, 0x437000
push eax
push ebx
call fcn.00406af8
cmp word [0x437000], 0x22
mov dword [0x42c3c0], 0x400000
mov eax, ebx
jne 0x403b42
push 0x22
mov eax, 0x437002
pop edi
push edi
push eax
call fcn.004063f4
push eax
call dword [sym.imp.USER32.dll_CharNextW]
mov ecx, eax
mov dword [esp + 0x14], ecx
mov ax, word [ecx]
cmp ax, bp
je 0x403c73
push 0x20
pop ebp
cmp ax, bp
jne 0x403b71
inc ecx
inc ecx
cmp word [ecx], bp
je 0x403b6a
cmp word [ecx], 0x22
jne 0x403b7c
inc ecx
push 0x22
inc ecx
pop ebp
cmp word [ecx], 0x2f
jne 0x403c3f
inc ecx
inc ecx
cmp word [ecx], 0x53
jne 0x403ba7
mov ax, word [ecx + 2]
cmp ax, 0x20
je 0x403b9d
test ax, ax
jne 0x403ba7
mov dword [0x42c460], 1
movzx eax, word [0x40afb6]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov edi, eax
xor esi, esi
movzx eax, word [0x40afb4]
cdq
movzx edx, word [str.NCRC]
or edi, eax
movzx eax, word [0x40afb2]
shl eax, 0x10
or eax, edx
cdq
or esi, eax
mov eax, dword [ecx]
or edi, edx
cmp eax, esi
jne 0x403bfd
mov eax, dword [ecx + 4]
cmp eax, edi
jne 0x403bfd
mov ax, word [ecx + 8]
cmp ax, 0x20
je 0x403bf8
test ax, ax
jne 0x403bfd
or dword [esp + 0x10], 4
movzx eax, word [0x40afaa]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov edi, eax
xor esi, esi
movzx eax, word [0x40afa8]
cdq
movzx edx, word [str.__D]
or edi, eax
movzx eax, word [0x40afa6]
shl eax, 0x10
or eax, edx
cdq
or esi, eax
mov eax, dword [ecx - 4]
or edi, edx
cmp eax, esi
jne 0x403c3f
mov eax, dword [ecx]
cmp eax, edi
je 0x403c5e
push ebp
push ecx
call fcn.004063f4
mov ecx, eax
cmp word [ecx], 0x22
jne 0x403c50
inc ecx
inc ecx
mov ax, word [ecx]
test ax, ax
jne 0x403b62
jmp 0x403c71
and word [ecx - 4], 0
add ecx, 4
push ecx
push 0x437800
call fcn.00406af8
xor ebp, ebp
mov edi, dword [sym.imp.KERNEL32.dll_GetTempPathW]
mov esi, 0x439800
push esi
push 0x400
call edi
call fcn.0040396f
test eax, eax
jne 0x403ce5
push 0x3fb
push esi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryW]
push str.Temp
push esi
call sub.KERNEL32.dll_lstrcatW
call fcn.0040396f
test eax, eax
jne 0x403ce5
push esi
push 0x3fc
call edi
push 0x40af90
push esi
call sub.KERNEL32.dll_lstrcatW
mov edi, dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableW]
push esi
push str.TEMP
call edi
push esi
push 0x40af7c
call edi
call fcn.0040396f
test eax, eax
je 0x403ef3
push 0x439000
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
push dword [esp + 0x10]
call fcn.00403526
cmp eax, ebp
mov dword [esp + 0x18], eax
jne 0x403ef3
cmp dword [0x42c3dc], ebp
je 0x403da4
push ebp
push ebx
call fcn.004063f4
mov edi, eax
cmp edi, ebx
jb 0x403d6a
movzx eax, word [0x40af76]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov ebp, eax
movzx eax, word [0x40af74]
movzx ecx, word [str.___]
cdq
or ebp, eax
movzx eax, word [0x40af72]
shl eax, 0x10
or eax, ecx
xor ecx, ecx
cdq
or ecx, eax
mov eax, ebp
or eax, edx
mov edx, dword [edi]
cmp edx, ecx
jne 0x403d62
mov edx, dword [edi + 4]
cmp edx, eax
je 0x403d68
dec edi
dec edi
cmp edi, ebx
jae 0x403d55
xor ebp, ebp
cmp edi, ebx
mov dword [esp + 0x18], str.Error_launching_installer
jb 0x403dc0
mov word [edi], bp
add edi, 8
push edi
call fcn.004064cf
test eax, eax
je 0x403ef3
push edi
push 0x437800
call fcn.00406af8
push edi
push 0x438000
call fcn.00406af8
mov dword [esp + 0x18], ebp
or dword [0x42c46c], 0xffffffff
call fcn.004040c0
push 1
mov dword [esp + 0x24], eax
call fcn.00406e55
jmp 0x403ef3
call fcn.0040606a
push esi
mov dword [esp + 0x20], eax
call sub.KERNEL32.dll_lstrlenW
push dword [esp + 0x14]
mov edi, eax
push section..ndata
call fcn.00406af8
cmp word [0x437800], bp
jne 0x403df7
push 0x438800
push 0x437800
call fcn.00406af8
lea eax, [edi*2 + 0x439800]
mov dword [esp + 0x10], 1
mov dword [esp + 0x24], eax
mov edi, 0x42f800
mov ebx, 0x430000
mov dword [esp + 0x14], ebp
movzx ebp, word [esp + 0x10]
push ebp
push str.nsu_X.tmp
push dword [esp + 0x2c]
call dword [sym.imp.USER32.dll_wsprintfW]
mov eax, dword [0x42c3d0]
add esp, 0xc
push dword [eax + 0x120]
push edi
call fcn.00406b35
cmp dword [esp + 0x1c], 0
push esi
je 0x403e50
call fcn.00405ff3
jmp 0x403e55
call fcn.0040604d
test eax, eax
je 0x403e93
push edi
call dword [sym.imp.KERNEL32.dll_GetFileAttributesW]
test ah, 4
jne 0x403e84
push edi
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
test eax, eax
je 0x403e84
push 1
push esi
call fcn.004061ab
mov eax, dword [esp + 0x14]
inc dword [esp + 0x14]
test eax, eax
je 0x403e1d
inc dword [esp + 0x10]
xor ebp, ebp
cmp word [esp + 0x10], bp
jne 0x403e14
jmp 0x403ef3
push esi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryW]
push 0
push esi
call fcn.004068b8
push 1
push edi
push 0x43a800
call dword [sym.imp.KERNEL32.dll_CopyFileW]
test eax, eax
je 0x403ef1
push 0
push edi
call fcn.004068b8
mov eax, dword [0x42c3d0]
push dword [eax + 0x124]
push ebx
call fcn.00406b35
push ebx
call fcn.00406082
test eax, eax
jne 0x403f1b
mov eax, dword [esp + 0x14]
inc dword [esp + 0x14]
test eax, eax
jne 0x403ef1
push edi
call fcn.004070a3
test eax, eax
je 0x403e1d
xor ebp, ebp
call fcn.00403fc5
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x18], ebp
pop ebx
je 0x403f29
push 0x200010
push dword [esp + 0x18]
call fcn.004060ff
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
and dword [esp + 0x18], 0
jmp 0x403ef1
cmp dword [0x42c454], ebp
je 0x403fad
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 0x403f7d
lea eax, [esp + 0x28]
push eax
push str.SeShutdownPrivilege
push ebp
call dword [sym.imp.ADVAPI32.dll_LookupPrivilegeValueW]
push ebp
push ebp
lea eax, [esp + 0x2c]
push ebp
push eax
push ebp
push dword [esp + 0x2c]
mov dword [esp + 0x3c], 1
mov dword [esp + 0x48], 2
call dword [sym.imp.ADVAPI32.dll_AdjustTokenPrivileges]
push 4
call fcn.0040713a
cmp eax, ebp
mov esi, 0x80040002
je 0x403f99
push esi
push 0x25
push ebp
push ebp
push ebp
call eax
test eax, eax
je 0x403fa6
push esi
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x403fad
push 9
call fcn.0040140b
mov eax, dword [0x42c46c]
cmp eax, 0xffffffff
je 0x403fbb
mov dword [esp + 0x1c], eax
push dword [esp + 0x1c]
call dword [sym.imp.KERNEL32.dll_ExitProcess]