Function at 0x79cbb0
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 0x878f5c
mov dword [esp + 0x2c], ecx
lea esi, [ecx + 0x24]
call fcn.007a3890
add esp, 4
push eax
push esi
call fcn.0079b800
add esp, 8
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 0x878f24
xor bl, bl
call fcn.007a3890
add esp, 4
push eax
push 0x80000001
call dword [sym.imp.advapi32.dll_RegCreateKeyExA]
test eax, eax
jne 0x79cd4f
mov eax, dword [esp + 0x24]
mov edi, dword [sym.imp.user32.dll_wsprintfA]
cmp eax, 2
jne 0x79ccc1
lea edx, [esp + 0x14]
lea eax, [esp + 0x40]
push edx
push eax
push 0
push 0
push 0x878f10
mov dword [esp + 0x28], 0x40
call fcn.007a3890
mov ecx, dword [esp + 0x2c]
mov ebp, dword [sym.imp.advapi32.dll_RegQueryValueExA]
add esp, 4
push eax
push ecx
call ebp
push str.Thu_Feb_21_17:46:31_2008
lea edx, [esp + 0x84]
push 0x878f0c
push edx
call edi
mov eax, dword [esp + 0x20]
add esp, 0xc
test eax, eax
je 0x79cc96
lea eax, [esp + 0x80]
lea ecx, [esp + 0x40]
push eax
push ecx
call dword [sym.imp.kernel32.dll_lstrcmp]
test eax, eax
jne 0x79cc96
mov bl, 1
lea edx, [esp + 0x14]
lea eax, [esp + 0x10]
push edx
push eax
push 0
push 0
push 0x878efc
mov dword [esp + 0x28], 4
call fcn.007a3890
mov ecx, dword [esp + 0x2c]
add esp, 4
push eax
push ecx
call ebp
push str.Thu_Feb_21_17:46:31_2008
lea edx, [esp + 0x44]
push 0x878f0c
push edx
call edi
add esp, 0xc
lea eax, [esp + 0x40]
push eax
call dword [sym.imp.kernel32.dll_lstrlen]
inc eax
lea ecx, [esp + 0x40]
push eax
push ecx
push 1
push 0
push 0x878ee8
mov dword [esp + 0x28], eax
call fcn.007a3890
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 0x79cd1c
inc dword [esp + 0x10]
jmp 0x79cd24
mov dword [esp + 0x10], 0
lea eax, [esp + 0x10]
push 4
push eax
push 4
push 0
push 0x878efc
call fcn.007a3890
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 0x79d180
cmp eax, 5
ja 0x79d180
test bl, bl
je 0x79cd76
cmp dword [0x88882c], 9
jge 0x79d180
push 0x878ed8
call fcn.007a3890
add esp, 4
push eax
push esi
call fcn.0079b800
mov eax, dword [esi]
add esp, 8
cmp eax, 0xffffffff
je 0x79ceaf
lea edi, [esi + 0x101c]
push edi
call dword [sym.imp.kernel32.dll_GetLocalTime]
mov eax, dword [esi + 0x143c]
test eax, eax
je 0x79cdbe
mov ecx, dword [esi + 0x1440]
cmp ecx, eax
mov eax, 0x8780f8
ja 0x79cdc3
mov eax, 0x882970
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 0x8780a0
lea ebp, [esi + 0x1c]
call fcn.007a3820
add esp, 4
push eax
push ebp
call fcn.007a8755
mov edi, ebp
or ecx, 0xffffffff
xor eax, eax
add esp, 0x28
repne scasb al, byte es:[edi]
mov eax, dword [esi + 0x1438]
not ecx
dec ecx
test eax, eax
mov edi, ecx
je 0x79ce67
test edi, edi
jle 0x79ce79
mov ecx, 0xffffffe4
mov eax, ebp
sub ecx, esi
mov edx, dword [esi + 0x1438]
add edx, 2
mov dword [esi + 0x1438], edx
mov bl, byte [eax]
add dl, 0x43
xor bl, dl
mov byte [eax], bl
inc eax
lea edx, [ecx + eax]
cmp edx, edi
jl 0x79ce45
jmp 0x79ce79
push ebp
push ebp
lea eax, [esi + 0x1030]
push edi
push eax
call fcn.007a31d0
add esp, 0x10
cmp dword [esi + 0x143c], 0x3e7
je 0x79ce97
mov edx, dword [esi]
lea ecx, [esp + 0x20]
push 0
push ecx
push edi
push ebp
push edx
call dword [sym.imp.kernel32.dll_WriteFile]
mov eax, dword [esi]
push eax
call dword [sym.imp.kernel32.dll_SetEndOfFile]
mov ecx, dword [esi]
push ecx
call dword [sym.imp.kernel32.dll_CloseHandle]
mov dword [esi], 0xffffffff
mov ecx, 0x888618
call fcn.007a14a0
test eax, eax
jne 0x79cedd
push 0x878ec8
call fcn.007a3890
add esp, 4
mov ecx, 0x888618
push eax
call fcn.007a1290
test eax, eax
je 0x79d180
push 0x878eb4
call fcn.007a3890
add esp, 4
mov ecx, 0x888618
push eax
call fcn.007a14a0
push eax
call fcn.0079df80
push 0x878e9c
mov esi, eax
call fcn.007a3890
add esp, 4
mov ecx, 0x888618
push eax
call fcn.007a14a0
push eax
call fcn.0079df80
push 0x878e84
mov edi, eax
call fcn.007a3890
add esp, 4
mov ecx, 0x888618
push eax
call fcn.007a14a0
push eax
call fcn.0079df80
push 0x878e74
mov ebp, eax
call fcn.007a3890
add esp, 4
mov ecx, 0x888618
push eax
call fcn.007a14a0
push eax
call fcn.0079df80
test esi, esi
mov dword [esp + 0x20], eax
je 0x79d180
test edi, edi
je 0x79d180
test ebp, ebp
je 0x79d180
test eax, eax
je 0x79d180
push 0
push 0
push 0
push 0
push 0x878e68
call fcn.007a3820
add esp, 4
push eax
call esi
mov ebx, eax
test ebx, ebx
je 0x79d180
push 0
push 0x8000000
push 1
push 0x878e34
call fcn.007a3890
add esp, 4
push eax
push 0x878e28
call fcn.007a3820
add esp, 4
push eax
push 0x17ac
push 0x878e18
call fcn.007a3820
add esp, 4
push eax
push ebx
call edi
mov esi, eax
test esi, esi
jne 0x79cff0
push ebx
call ebp
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x2b4
ret
lea edx, [esp + 0x1c]
lea eax, [esp + 0x140]
mov edi, 0x80
push edx
push eax
mov byte [esp + 0x148], 0
mov dword [esp + 0x24], edi
call dword [sym.imp.kernel32.dll_GetComputerNameA]
lea ecx, [esp + 0x1c]
lea edx, [esp + 0xc0]
push ecx
push edx
mov byte [esp + 0xc8], 0
mov dword [esp + 0x24], edi
call dword [sym.imp.advapi32.dll_GetUserNameA]
lea eax, [esp + 0x2c]
push eax
call dword [sym.imp.kernel32.dll_GetLocalTime]
mov eax, dword [0x88882c]
cmp eax, 1
jne 0x79d04f
push 0x878e0c
jmp 0x79d0b4
cmp eax, 2
jne 0x79d05b
push 0x878e00
jmp 0x79d0b4
cmp eax, 3
jne 0x79d067
push 0x878df8
jmp 0x79d0b4
cmp eax, 4
jne 0x79d073
push 0x878dec
jmp 0x79d0b4
cmp eax, 5
jne 0x79d07f
push 0x878de0
jmp 0x79d0b4
cmp eax, 6
jne 0x79d08b
push 0x878dd0
jmp 0x79d0b4
cmp eax, 7
jne 0x79d097
push 0x878dc4
jmp 0x79d0b4
cmp eax, 8
jne 0x79d0a3
push 0x878db8
jmp 0x79d0b4
cmp eax, 9
jne 0x79d0af
push 0x878dac
jmp 0x79d0b4
push 0x878da4
call fcn.007a3820
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 + 0x2b38]
add ecx, 0x2b10
push edx
lea edx, [esp + 0xe0]
push edx
lea edx, [esp + 0x164]
push edx
mov edx, dword [0x88896c]
mov edx, dword [edx + 0x10]
push edx
push eax
push 0x34
push ecx
push 0x878d48
call fcn.007a3890
add esp, 4
push eax
lea eax, [esp + 0x1fc]
push 0x104
push eax
call fcn.007ab6ba
add esp, 0x44
lea ecx, [esp + 0x1c0]
push 0
push 0x4000002
push ecx
push 0x88850c
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