Function at 0x51fcb8
Capabilities:
Create thread
Hide graphical window
Log keystrokes via polling
Set environment variable

Disassembly:
push ebp
mov ebp, esp
sub esp, 0x148
mov dword [ebp - 0x108], 0x5567f0
mov dword [ebp - 4], 0x5567d4
mov al, byte [ebp + 0x14]
mov byte [0x55d214], al
mov cl, byte [ebp + 0x10]
mov byte [0x55d215], cl
mov edx, dword [ebp + 8]
mov dword [0x55d200], edx
mov eax, dword [ebp + 0xc]
mov dword [0x55d1fc], eax
mov ecx, dword [ebp + 0x18]
and ecx, 0xff
test ecx, ecx
je 0x51fd72
mov edx, dword [ebp + 0x14]
and edx, 0xff
test edx, edx
jne 0x51fd72
mov byte [0x55d221], 1
call dword [sym.imp.KERNEL32.dll_GetTickCount]
add eax, 0xfa
mov dword [ebp - 0x114], eax
push 0x55d218
push 0
push 0
push 0x520200
push 0
push 0
call dword [sym.imp.KERNEL32.dll_CreateThread]
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
xor eax, eax
mov al, byte [0x55d221]
test eax, eax
je 0x51fd68
call dword [sym.imp.KERNEL32.dll_GetTickCount]
cmp eax, dword [ebp - 0x114]
jae 0x51fd68
push 1
call dword [sym.imp.KERNEL32.dll_Sleep]
jmp 0x51fd45
mov eax, 1
jmp 0x51ffc0
call dword [sym.imp.KERNEL32.dll_GetCurrentThreadId]
mov dword [0x55d218], eax
xor ecx, ecx
mov cl, byte [0x55d220]
test ecx, ecx
jne 0x51fe44
mov dword [ebp - 0x13c], 0
mov dword [ebp - 0x138], 0x51ffc4
mov dword [ebp - 0x134], 0
mov dword [ebp - 0x130], 0
mov edx, dword [0x55d1f0]
mov dword [ebp - 0x12c], edx
mov dword [ebp - 0x128], 0
xor eax, eax
mov al, byte [0x55d214]
neg eax
sbb eax, eax
and al, 0xfe
add eax, 0x7f02
push eax
push 0
call dword [sym.imp.USER32.dll_LoadCursorA]
mov dword [ebp - 0x124], eax
mov dword [ebp - 0x120], 0
mov dword [ebp - 0x11c], 0
mov ecx, dword [ebp + 0x14]
and ecx, 0xff
test ecx, ecx
je 0x51fe18
mov edx, dword [ebp - 4]
mov dword [ebp - 0x144], edx
jmp 0x51fe24
mov eax, dword [ebp - 0x108]
mov dword [ebp - 0x144], eax
mov ecx, dword [ebp - 0x144]
mov dword [ebp - 0x118], ecx
lea edx, [ebp - 0x13c]
push edx
call dword [sym.imp.USER32.dll_RegisterClassA]
mov byte [0x55d220], 1
mov eax, dword [ebp + 0x14]
and eax, 0xff
test eax, eax
je 0x51fe86
mov dword [ebp - 0x140], 0
jmp 0x51fe6b
mov ecx, dword [ebp - 0x140]
add ecx, 1
mov dword [ebp - 0x140], ecx
cmp dword [ebp - 0x140], 0x100
jge 0x51fe86
mov edx, dword [ebp - 0x140]
push edx
call dword [sym.imp.USER32.dll_GetAsyncKeyState]
jmp 0x51fe5c
push 0
call dword [sym.imp.USER32.dll_GetSystemMetrics]
sub eax, dword [0x55d200]
cdq
sub eax, edx
sar eax, 1
mov dword [ebp - 0x110], eax
push 1
call dword [sym.imp.USER32.dll_GetSystemMetrics]
sub eax, dword [0x55d1fc]
cdq
sub eax, edx
sar eax, 1
mov dword [ebp - 0x10c], eax
mov eax, dword [ebp + 0x14]
and eax, 0xff
test eax, eax
je 0x51fecf
mov ecx, dword [ebp - 4]
mov dword [ebp - 0x148], ecx
jmp 0x51fedb
mov edx, dword [ebp - 0x108]
mov dword [ebp - 0x148], edx
push 0
mov eax, dword [0x55d1f0]
push eax
push 0
push 0
mov ecx, dword [0x55d1fc]
push ecx
mov edx, dword [0x55d200]
push edx
mov eax, dword [ebp - 0x10c]
push eax
mov ecx, dword [ebp - 0x110]
push ecx
xor edx, edx
mov dl, byte [0x55d214]
neg edx
sbb edx, edx
and edx, 0xf8000000
add edx, 0x8000000
or edx, 0x80000000
push edx
push 0
mov eax, dword [ebp - 0x148]
push eax
mov ecx, dword [ebp + 0x10]
and ecx, 0xff
neg ecx
sbb ecx, ecx
and ecx, 0xffffff88
add ecx, 0x80
push ecx
call dword [sym.imp.USER32.dll_CreateWindowExA]
mov dword [0x55d208], eax
push 4
mov edx, dword [0x55d208]
push edx
call dword [sym.imp.USER32.dll_ShowWindow]
mov eax, dword [0x55d208]
push eax
call dword [sym.imp.USER32.dll_UpdateWindow]
mov ecx, dword [ebp + 0x14]
and ecx, 0xff
test ecx, ecx
je 0x51ff88
push 0
push 0x64
push 2
mov edx, dword [0x55d208]
push edx
call dword [sym.imp.USER32.dll_SetTimer]
mov eax, dword [0x55d208]
push eax
push 0x55668c
lea ecx, [ebp - 0x104]
push ecx
call fcn.0053280a
add esp, 0xc
lea edx, [ebp - 0x104]
push edx
push 0x5567c4
call dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableA]
mov byte [0x55d221], 0
mov eax, dword [0x55d208]
mov esp, ebp
pop ebp
ret