Function at 0x403420
Capabilities:
Connect to http server
Create http request
Download and write a file
Get http content length
Parse url
Read data from internet
Receive and write data from server to client
Receive data
Resolve function by parsing pe exports
Write file on windows

Disassembly:
mov eax, 0x24f4
call fcn.00426e50
mov eax, dword [0x458320]
xor eax, esp
mov dword [esp + 0x24f0], eax
push esi
push edi
xor eax, eax
push 0x1fe
mov esi, ecx
push eax
lea ecx, [esp + 0x272]
mov edi, edx
push ecx
mov dword [esp + 0x14], edi
mov word [esp + 0x274], ax
call fcn.004266d0
xor edx, edx
push 0xfe
push edx
lea eax, [esp + 0x7e]
push eax
mov word [esp + 0x80], dx
call fcn.004266d0
xor ecx, ecx
push 0xfe
push ecx
lea edx, [esp + 0x18a]
push edx
mov word [esp + 0x18c], cx
call fcn.004266d0
xor eax, eax
push 0x1046
push eax
lea ecx, [esp + 0x14de]
push ecx
mov word [esp + 0x14e0], ax
call fcn.004266d0
push 0x38
lea edx, [esp + 0x64]
push 0
push edx
call fcn.004266d0
lea eax, [esp + 0x2a4]
mov dword [esp + 0x78], eax
mov eax, 0x80
mov dword [esp + 0x88], eax
mov dword [esp + 0x90], eax
add esp, 0x3c
lea ecx, [esp + 0x68]
lea edx, [esp + 0x168]
lea eax, [esp + 0x14b0]
mov dword [esp + 0x2c], 0x3c
mov dword [esp + 0x40], 0x100
mov dword [esp + 0x48], ecx
mov dword [esp + 0x50], edx
mov dword [esp + 0x58], eax
mov dword [esp + 0x5c], 0x824
test edi, edi
je 0x40389d
lea ecx, [esp + 0x2c]
push ecx
push 0
push 0
push esi
call dword [sym.imp.WININET.dll_InternetCrackUrlW]
test eax, eax
mov eax, dword [esp + 0x38]
je 0x40353d
cmp eax, 3
je 0x40355d
cmp eax, 4
je 0x40355d
xor edi, edi
mov eax, edi
pop edi
pop esi
mov ecx, dword [esp + 0x24f0]
xor ecx, esp
call fcn.004266be
add esp, 0x24f4
ret
mov edi, dword [sym.imp.WININET.dll_InternetSetOptionW]
xor edx, edx
push ebx
cmp eax, 4
push 4
sete dl
lea eax, [esp + 0x14]
push eax
push 2
push 0
mov dword [esp + 0x20], 0x7530
mov esi, edx
call edi
push 4
lea ecx, [esp + 0x14]
push ecx
push 5
push 0
call edi
push 4
lea edx, [esp + 0x14]
push edx
push 6
push 0
call edi
push 4
lea eax, [esp + 0x14]
push eax
push 7
push 0
call edi
push 4
lea ecx, [esp + 0x14]
push ecx
push 8
push 0
call edi
push 0
push 0
push 0
push 0
push str.Beacon
call dword [sym.imp.WININET.dll_InternetOpenW]
mov ebx, eax
mov dword [esp + 0x24], ebx
test ebx, ebx
jne 0x4035db
xor edi, edi
jmp 0x403878
mov ecx, dword [esp + 0x48]
push ebp
push 0
push 0
push 3
lea edx, [esp + 0x17c]
push edx
lea eax, [esp + 0x80]
push eax
push ecx
lea edx, [esp + 0x288]
push edx
push ebx
call dword [sym.imp.WININET.dll_InternetConnectW]
mov ebp, eax
mov dword [esp + 0x20], ebp
test ebp, ebp
jne 0x403617
xor edi, edi
jmp 0x40386c
xor eax, eax
push 0x1046
push eax
lea ecx, [esp + 0x47a]
push ecx
mov word [esp + 0x47c], ax
call fcn.004266d0
add esp, 0xc
cmp dword [esp + 0x64], 0
je 0x403661
mov eax, dword [esp + 0x60]
lea edx, [esp + 0x470]
sub edx, eax
jmp 0x403650
movzx ecx, word [eax]
mov word [edx + eax], cx
add eax, 2
test cx, cx
jne 0x403650
jmp 0x403687
xor eax, eax
jmp 0x403670
movzx ecx, word [eax + 0x4531e4]
mov word [esp + eax + 0x470], cx
add eax, 2
test cx, cx
jne 0x403670
neg esi
sbb esi, esi
push 0
and esi, 0x800000
add esi, 0x80000000
mov ebx, esi
push ebx
push 0
push 0x453350
push 0x4531e8
lea edx, [esp + 0x484]
push edx
push str.HEAD
push ebp
mov ebp, dword [sym.imp.WININET.dll_HttpOpenRequestW]
call ebp
mov esi, eax
mov dword [esp + 0x24], eax
call fcn.00403320
mov edi, eax
test edi, edi
je 0x403855
push 0
lea eax, [esp + 0x30]
push eax
lea ecx, [esp + 0x24]
push ecx
push 0x20000005
mov edx, esi
push edx
mov dword [esp + 0x30], 0
mov dword [esp + 0x40], 4
call dword [sym.imp.WININET.dll_HttpQueryInfoW]
test eax, eax
je 0x403712
cmp dword [esp + 0x1c], 0x3e800000
jbe 0x403712
xor edi, edi
jmp 0x403855
mov ecx, dword [esp + 0x20]
push 0
push ebx
push 0
push 0x453350
push 0x4531e8
lea eax, [esp + 0x484]
push eax
push 0x453208
push ecx
call ebp
mov ebp, eax
mov esi, ebp
call fcn.00403320
mov edi, eax
test edi, edi
je 0x40384a
mov edx, dword [esp + 0x10]
push 0
push 0x80
push 2
push 0
push 3
push 0x40000000
push edx
call dword [sym.imp.KERNEL32.dll_CreateFileW]
mov esi, eax
cmp esi, 0xffffffff
jne 0x403773
xor edi, edi
jmp 0x40384a
push 0x80000
call fcn.0042787c
mov ebx, eax
xor edi, edi
add esp, 4
cmp ebx, edi
je 0x40382f
push 0x80000
push edi
push ebx
mov dword [esp + 0x1c], edi
mov dword [esp + 0x3c], edi
mov dword [esp + 0x24], edi
call fcn.004266d0
add esp, 0xc
lea eax, [esp + 0x18]
push eax
push 0x80000
push ebx
push ebp
call dword [sym.imp.WININET.dll_InternetReadFile]
mov edi, eax
test edi, edi
je 0x40382f
nop
mov eax, dword [esp + 0x18]
xor edi, edi
test eax, eax
jbe 0x4037ec
add dword [esp + 0x10], eax
push edi
lea ecx, [esp + 0x34]
push ecx
push eax
push ebx
push esi
call dword [sym.imp.KERNEL32.dll_WriteFile]
mov edi, eax
test edi, edi
je 0x40382f
push esi
call dword [sym.imp.KERNEL32.dll_FlushFileBuffers]
jmp 0x4037ee
je 0x403820
push 0x80000
push 0
push ebx
mov dword [esp + 0x24], 0
call fcn.004266d0
add esp, 0xc
lea edx, [esp + 0x18]
push edx
push 0x80000
push ebx
push ebp
call dword [sym.imp.WININET.dll_InternetReadFile]
mov edi, eax
test edi, edi
jne 0x4037c0
jmp 0x40382f
mov eax, dword [esp + 0x10]
cmp eax, dword [esp + 0x1c]
jne 0x40382f
mov edi, 1
push esi
call dword [sym.imp.KERNEL32.dll_FlushFileBuffers]
push esi
call dword [sym.imp.KERNEL32.dll_CloseHandle]
test ebx, ebx
je 0x40384a
push ebx
call fcn.004276aa
add esp, 4
test ebp, ebp
je 0x403855
push ebp
call dword [sym.imp.WININET.dll_InternetCloseHandle]
mov eax, dword [esp + 0x24]
test eax, eax
je 0x403864
push eax
call dword [sym.imp.WININET.dll_InternetCloseHandle]
mov ebx, dword [esp + 0x28]
mov ebp, dword [esp + 0x20]
test ebp, ebp
je 0x403877
push ebp
call dword [sym.imp.WININET.dll_InternetCloseHandle]
pop ebp
test ebx, ebx
je 0x403883
push ebx
call dword [sym.imp.WININET.dll_InternetCloseHandle]
pop ebx
mov eax, edi
pop edi
pop esi
mov ecx, dword [esp + 0x24f0]
xor ecx, esp
call fcn.004266be
add esp, 0x24f4
ret
mov ecx, dword [esp + 0x24f8]
pop edi
pop esi
xor ecx, esp
xor eax, eax
call fcn.004266be
add esp, 0x24f4
ret