Function at 0x404126
Capabilities:
Accept command line arguments
Check os version
Copy file
Delete file
Get common file path
Get file system object information
Set current directory
Set environment variable
Shutdown system
Terminate process

Disassembly:
push ebp
mov ebp, esp
push edi
push esi
push ebx
sub esp, 0x1ac
mov dword [esp], 0x8001
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
push esi
call dword [sym.imp.KERNEL32.dll_GetVersion]
and eax, 0xbfffffff
mov dword [0x4371a0], eax
cmp ax, 6
je 0x404171
mov dword [esp], 0
call fcn.0040896b
push ebx
test eax, eax
je 0x404171
mov dword [esp], 0xc00
call eax
push ecx
mov ebx, str.UXTHEME
mov dword [esp], ebx
call fcn.004088e0
push eax
mov dword [esp], ebx
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea ebx, [ebx + eax + 1]
push edx
cmp byte [ebx], 0
jne 0x404176
mov dword [esp], 0xa
call fcn.0040896b
push ebx
mov dword [esp], 8
call fcn.0040896b
push esi
mov dword [0x4371a4], eax
mov dword [esp], 6
call fcn.0040896b
push edi
test eax, eax
je 0x4041da
mov dword [esp], 0x1e
call eax
push ecx
test eax, eax
je 0x4041da
or dword [0x4371a0], 0x40000000
call dword [sym.imp.COMCTL32.DLL_InitCommonControls]
mov dword [esp], 0
call dword [sym.imp.ole32.dll_OleInitialize]
push edi
mov dword [0x437118], eax
lea eax, [ebp - 0x178]
mov dword [esp + 0x10], 0
mov dword [esp + 0xc], 0x160
mov dword [esp + 8], eax
mov dword [esp + 4], 0
mov dword [esp], 0x40b2bd
call dword [sym.imp.SHELL32.dll_SHGetFileInfoA]
sub esp, 0x14
mov dword [esp + 4], str.NSIS_Error
mov dword [esp], 0x4371c0
call fcn.00407e8c
push eax
push eax
call dword [sym.imp.KERNEL32.dll_GetCommandLineA]
mov ecx, dword [0x40b634]
add ecx, 0x5000
mov dword [esp + 4], eax
mov dword [esp], ecx
mov dword [ebp - 0x18c], ecx
call fcn.00407e8c
push eax
push eax
mov dword [esp], 0
call dword [sym.imp.KERNEL32.dll_GetModuleHandleA]
mov dword [0x4371ac], eax
mov eax, dword [0x40b634]
push edx
movsx eax, byte [eax + 0x5000]
cmp al, 0x22
jne 0x404292
mov ecx, dword [0x40b634]
lea edx, [ecx + 0x5001]
jmp 0x40429d
mov edx, dword [ebp - 0x18c]
mov eax, 0x20
mov dword [esp], edx
xor edi, edi
mov dword [esp + 4], eax
call fcn.0040774d
push ebx
push ebx
mov dword [esp], eax
call dword [sym.imp.USER32.dll_CharNextA]
mov dword [ebp - 0x190], eax
push esi
cmp byte [eax], 0
je 0x40435a
movsx edx, byte [eax]
cmp dl, 0x20
jne 0x4042d1
inc eax
jmp 0x4042c6
cmp dl, 0x22
jne 0x4042d9
inc eax
jmp 0x4042de
mov edx, 0x20
cmp byte [eax], 0x2f
jne 0x40433d
cmp byte [eax + 1], 0x53
lea ebx, [eax + 1]
jne 0x4042fc
test byte [eax + 2], 0xdf
jne 0x4042fc
mov dword [0x437100], 1
cmp dword [eax + 1], 0x4352434e
jne 0x404311
test byte [eax + 5], 0xdf
mov ecx, 4
cmove edi, ecx
cmp dword [eax - 1], 0x3d442f20
jne 0x40433b
mov byte [eax - 1], 0
add eax, 3
mov dword [esp + 4], eax
mov eax, dword [0x40b634]
add eax, 0x5400
mov dword [esp], eax
call fcn.00407e8c
push ecx
push ecx
jmp 0x40435a
mov eax, ebx
mov dword [esp + 4], edx
mov dword [esp], eax
call fcn.0040774d
push edx
push edx
cmp byte [eax], 0x22
jne 0x4042bd
inc eax
jmp 0x4042bd
mov eax, dword [0x40b634]
mov dword [esp], 0x400
mov esi, dword [sym.imp.KERNEL32.dll_GetTempPathA]
lea ebx, [eax + 0x6400]
mov dword [esp + 4], ebx
call esi
push eax
push eax
call fcn.00404084
test eax, eax
je 0x4043b1
mov eax, dword [0x40b634]
add eax, 0x6000
mov dword [esp], eax
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
push edx
mov dword [esp], edi
xor edi, edi
call fcn.00403d63
mov esi, eax
push ecx
test eax, eax
jne 0x40467c
jmp 0x40443b
mov dword [esp + 4], 0x3fb
mov dword [esp], ebx
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryA]
push eax
push eax
mov dword [esp + 4], str.Temp
mov dword [esp], ebx
call sub.KERNEL32.dll_lstrcatA
push eax
push eax
call fcn.00404084
test eax, eax
jne 0x404383
mov dword [esp + 4], ebx
mov dword [esp], 0x3fc
call esi
push esi
push esi
mov dword [esp + 4], 0x40b2cf
mov dword [esp], ebx
call sub.KERNEL32.dll_lstrcatA
mov esi, dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableA]
push eax
push eax
mov dword [esp + 4], ebx
mov dword [esp], str.TEMP
call esi
push eax
push eax
mov dword [esp + 4], ebx
mov dword [esp], 0x40b2d8
call esi
push eax
push eax
call fcn.00404084
test eax, eax
jne 0x404383
mov esi, str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
jmp 0x40467a
cmp dword [0x437188], 0
je 0x404667
mov eax, dword [ebp - 0x18c]
mov dword [esp + 4], 0
mov dword [esp], eax
call fcn.0040774d
push ecx
push ecx
cmp dword [ebp - 0x18c], eax
ja 0x4044c5
cmp dword [eax], 0x3d3f5f20
je 0x404473
dec eax
jmp 0x404460
lea ebx, [eax + 4]
mov byte [eax], 0
mov dword [esp], ebx
call fcn.0040858d
push edx
test eax, eax
jne 0x404490
mov esi, str.Error_launching_installer
jmp 0x40467a
mov eax, dword [0x40b634]
mov dword [esp + 4], ebx
add eax, 0x5400
mov dword [esp], eax
call fcn.00407e8c
push eax
push eax
mov eax, dword [0x40b634]
add eax, 0x5800
mov dword [esp + 4], ebx
mov dword [esp], eax
call fcn.00407e8c
push eax
push eax
jmp 0x404667
call fcn.004089b7
mov dword [esp + 4], str.nsu
mov dword [esp], ebx
mov esi, eax
call sub.KERNEL32.dll_lstrcatA
push eax
push eax
test esi, esi
je 0x4044f4
mov dword [esp + 4], 0x40b2e1
mov dword [esp], ebx
call sub.KERNEL32.dll_lstrcatA
push edi
push edi
mov dword [esp + 4], str..tmp
mov dword [esp], ebx
call sub.KERNEL32.dll_lstrcatA
mov eax, dword [0x40b634]
push edx
push edx
lea edi, [eax + 0x5c00]
mov dword [esp + 4], edi
mov dword [esp], ebx
call dword [sym.imp.KERNEL32.dll_lstrcmpiA]
push ecx
push ecx
test eax, eax
je 0x404486
mov dword [esp], ebx
test esi, esi
je 0x404536
call fcn.0040754c
jmp 0x40453b
call fcn.004075e0
push eax
mov dword [esp], ebx
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryA]
push eax
mov eax, dword [0x40b634]
cmp byte [eax + 0x5400], 0
jne 0x404567
add eax, 0x5400
mov dword [esp + 4], edi
mov dword [esp], eax
call fcn.00407e8c
push eax
push eax
mov eax, dword [ebp - 0x190]
mov edi, 0x1a
mov esi, str.Error_launching_installer
mov dword [esp + 4], eax
mov eax, dword [0x40b634]
mov dword [esp], eax
call fcn.00407e8c
push eax
push eax
mov eax, dword [0x40b634]
mov word [eax + 0x400], 0x41
mov eax, dword [0x437120]
mov eax, dword [eax + 0x120]
mov dword [esp], 0x432060
mov dword [esp + 4], eax
call fcn.00407fce
push ecx
push ecx
mov dword [esp], 0x432060
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
push eax
test esi, esi
je 0x404641
mov eax, dword [0x40b634]
mov dword [esp + 8], 1
mov dword [esp + 4], 0x432060
add eax, 0x6c00
mov dword [esp], eax
call dword [sym.imp.KERNEL32.dll_CopyFileA]
sub esp, 0xc
test eax, eax
je 0x404641
mov dword [esp + 4], 0
mov dword [esp], 0x432060
call fcn.00408510
push eax
push eax
mov eax, dword [0x437120]
mov eax, dword [eax + 0x124]
mov dword [esp], 0x432060
mov dword [esp + 4], eax
call fcn.00407fce
push eax
push eax
mov dword [esp], 0x432060
call fcn.0040760e
push edx
test eax, eax
je 0x404641
mov dword [esp], eax
xor esi, esi
call dword [sym.imp.KERNEL32.dll_CloseHandle]
push eax
mov eax, dword [0x40b634]
inc byte [eax + 0x400]
dec edi
jne 0x404598
mov dword [esp + 4], 0
mov dword [esp], ebx
call fcn.00408510
push edi
push edi
jmp 0x40467a
mov dword [0x43710c], 0xffffffff
call fcn.00405f54
mov edi, eax
jmp 0x40467c
xor edi, edi
call fcn.004040df
call dword [sym.imp.ole32.dll_OleUninitialize]
test esi, esi
mov ebx, dword [sym.imp.KERNEL32.dll_ExitProcess]
je 0x4046af
mov dword [esp], esi
mov dword [esp + 4], 0x200010
call fcn.004076e1
push esi
push esi
mov dword [esp], 2
jmp 0x4047cf
cmp dword [0x4370f4], 0
je 0x4047c1
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
lea edx, [ebp - 0x17c]
mov dword [esp + 4], 0x28
mov dword [esp + 8], edx
mov dword [esp], eax
call dword [sym.imp.ADVAPI32.dll_OpenProcessToken]
sub esp, 0xc
test eax, eax
je 0x404756
lea eax, [ebp - 0x174]
mov dword [esp + 4], str.SeShutdownPrivilege
lea esi, [ebp - 0x178]
mov dword [esp + 8], eax
mov dword [esp], 0
call dword [sym.imp.ADVAPI32.dll_LookupPrivilegeValueA]
mov eax, dword [ebp - 0x17c]
mov dword [ebp - 0x178], 1
mov dword [ebp - 0x16c], 2
sub esp, 0xc
mov dword [esp + 0x14], 0
mov dword [esp + 0x10], 0
mov dword [esp + 0xc], 0
mov dword [esp + 8], esi
mov dword [esp + 4], 0
mov dword [esp], eax
call dword [sym.imp.ADVAPI32.dll_AdjustTokenPrivileges]
sub esp, 0x18
mov dword [esp], 4
call fcn.0040896b
push ecx
test eax, eax
jne 0x404784
mov dword [esp + 4], 0x80040002
mov dword [esp], 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
push edx
push edx
test eax, eax
je 0x4047b4
jmp 0x4047c1
mov dword [esp + 0x10], 0x80040002
mov dword [esp + 0xc], 0x25
mov dword [esp + 8], 0
mov dword [esp + 4], 0
mov dword [esp], 0
call eax
sub esp, 0x14
test eax, eax
jne 0x404767
mov dword [esp], 9
call fcn.0040391f
push eax
mov eax, dword [0x43710c]
cmp eax, 0xffffffff
cmovne edi, eax
mov dword [esp], edi
call ebx
nop
nop
nop