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Banalyzer.py
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Banalyzer.py
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from idaapi import PluginForm
from PyQt5 import QtWidgets, QtCore, QtGui
import idautils
import idaapi
import idc
from idautils import Functions
import ida_funcs
import ida_typeinf
sock_func_list = [
'socket',
'bind',
'listen',
'accept',
'connect',
'send',
'recv',
'close'
]
class Form(PluginForm):
def OnCreate(self, form):
self.parent = self.FormToPyQtWidget(form)
self.PopulateForm()
def PopulateForm(self):
layout = QtWidgets.QVBoxLayout()
self.result_table = QtWidgets.QTableWidget()
self.result_table.setColumnCount(6)
self.result_table.setHorizontalHeaderLabels(['Where', 'Caller Function', 'Vulnerable Function', 'Vulnerable Function\'s Address', 'Arguments', 'Type'])
layout.addWidget(self.result_table)
search_button = QtWidgets.QPushButton("Search")
search_button.clicked.connect(self.search_and_display_results)
layout.addWidget(search_button)
self.parent.setLayout(layout)
def move_to_function(self, item):
function_name = item.data(QtCore.Qt.UserRole)
func_ea = idc.get_name_ea_simple(function_name)
if func_ea != idc.BADADDR:
idaapi.jumpto(func_ea)
def check(self, func_name):
vuln_func_list = [
'strcpy', 'strncpy', 'strcat', 'strncat', 'sprintf', 'vsprintf', 'gets', 'memcpy', 'memmove', 'fread',
'strcpyA', 'strcpyW', 'wcscpy', 'StrCpy', 'lstrcpy', 'lstrcpyA', 'lstrcpyW', 'StrCpyA', 'StrCpyW',
'lstrcpyn', 'lstrcpynA', 'lstrcpynW', 'StrCpyNW', 'StrCpyNA', 'StrNCpy', 'strncpyA', 'strncpyW', 'wcsncpy',
'StrCpyN', 'strcatA', 'strcatW', 'lstrcat', 'lstrcatA', 'lstrcatW', 'StrCat', 'StrCatA', 'StrCatW',
'StrCatBuff', 'StrCatBuffA', 'StrCatBuffW', 'StrCatChainW', 'StrCatN', 'StrCatNA', 'StrCatNW',
'strncatA', 'strncatW', 'wcsncat', 'StrCatN', 'StrCatNA', 'StrCatNW', 'sprintfA', 'sprintfW', 'wsprintf',
'wsprintfA', 'wsprintfW', 'sprintfW', 'sprintfA', 'swprintf', 'swprintfA', 'swprintfW', 'vswprintf',
'vswprintfA', 'vswprintfW', 'vsprintfA', 'vsprintfW', 'vsprintf', 'strcpyA', 'strcpyW', 'wcscpy', 'StrCpy',
'lstrcpy', 'lstrcpyA', 'lstrcpyW', 'StrCpyA', 'StrCpyW', 'lstrcpyn', 'lstrcpynA', 'lstrcpynW', 'StrCpyNW',
'StrCpyNA', 'StrNCpy', 'strncpyA', 'strncpyW', 'wcsncpy', 'StrCpyN', 'strcatA', 'strcatW', 'lstrcat',
'lstrcatA', 'lstrcatW', 'StrCat', 'StrCatA', 'StrCatW', 'StrCatBuff', 'StrCatBuffA', 'StrCatBuffW',
'StrCatChainW', 'StrCatN', 'StrCatNA', 'malloc', 'free', 'read', 'write'
]
vuln_func_list += ['.' + func_name for func_name in vuln_func_list]
if func_name in vuln_func_list:
return True
else:
return False
def get_user_defined_functions(self):
udf = []
for func_ea in idautils.Functions():
func_name = idc.get_func_name(func_ea)
if idc.get_segm_name(func_ea) == ".text":
udf.append(func_name)
return udf
def get_function_start_address(self, ea):
if not isinstance(ea, int):
try:
ea = int(ea, 16)
except ValueError:
print("Invalid address format")
return idc.BADADDR
func = idaapi.get_func(ea)
if func:
return func.start_ea
return idc.BADADDR
def get_function_start_address_by_name(self, function_name):
func_ea = idaapi.get_name_ea(0, function_name)
if func_ea != idaapi.BADADDR and idaapi.is_func(idaapi.get_flags(func_ea)):
return self.get_function_start_address(func_ea)
else:
print("Function not found or address invalid")
return idc.BADADDR
def get_func_arguments(self, call_address):
args_addresses = []
if not isinstance(call_address, int):
try:
call_address = int(call_address, 16)
except ValueError:
print("Invalid address format")
return idc.BADADDR
func = ida_funcs.get_func(call_address)
if func:
frame = idaapi.get_frame(func)
if frame:
sp_offset = idc.get_spd(call_address)
arg_start_offset = 4
for i in range(4):
arg_addr = sp_offset + arg_start_offset + (i * 4)
if arg_addr < 0:
arg_addr = 0xFFFFFFFF + arg_addr + 1
args_addresses.append(hex(arg_addr))
return args_addresses
def get_function_name(self, ea):
if not isinstance(ea, int):
try:
ea = int(ea, 16)
except ValueError:
print("Invalid address format")
return idc.BADADDR
func = idaapi.get_func(ea)
if func:
return func.name
return idc.BADADDR
def find_function_xrefs(self, target_function):
func_ea = idc.get_name_ea_simple(target_function)
if func_ea != idc.BADADDR:
func_start_ea = idc.get_func_attr(func_ea, idc.FUNCATTR_START)
if func_start_ea != idc.BADADDR:
xrefs = idautils.XrefsTo(func_start_ea)
xrefs_list = []
for xref in xrefs:
if xref.type == idaapi.fl_CN or xref.type == idaapi.fl_CF:
caller_func = idc.get_func_name(xref.frm)
caller_ea = xref.frm
caller_xrefs = idautils.XrefsFrom(caller_ea)
# for caller_xref in caller_xrefs:
# caller_func_xref = idc.get_func_name(caller_xref.frm)
# caller_func_ea = caller_xref.frm
# print("caller_func_xref: ", caller_func_xref, hex(caller_func_ea))
xrefs_list.append((caller_func, hex(xref.frm)))
return xrefs_list
return []
def search_vuln_func(self):
results = []
udf_result=[]
exec_func_list = [
'system', 'exec', 'popen', 'ShellExecute', 'ShellExecuteA', 'ShellExecuteW',
'CreateProcess', 'CreateProcessA', 'CreateProcessW'
]
exec_func_list += ['.' + func_name for func_name in exec_func_list]
file_func_list = [
'open', 'fopen', 'access', 'stat', 'chdir', 'mkdir', 'rmdir', 'unlink', 'remove', 'rename',
'open64', 'fopen64', 'access64', 'stat64', 'chdir', 'mkdir64', 'rmdir64', 'unlink64', 'remove64', 'rename64'
]
file_func_list += ['.' + func_name for func_name in file_func_list]
read_calls = []
read_calls_name = []
read_calls_caller = []
new_results = []
for func_ea in idautils.Functions():
func_name = idc.get_func_name(func_ea)
if self.check(func_name) is True or func_name in exec_func_list or func_name in file_func_list:
xrefs_list = self.find_function_xrefs(func_name)
for xref in xrefs_list:
caller_func, caller_addr= xref
args = self.get_func_arguments(caller_addr)
results.append({
'where': hex(func_ea),
'caller_function': caller_func,
'vulnerable_function': idc.get_func_name(func_ea),
'call_address': caller_addr,
'arguments': args,
'type': 'Xrefs (Priority: Low)'
})
if idc.get_func_name(func_ea) in exec_func_list:
target_function = caller_func
target_addr = caller_addr
arg = args
if arg in [d['arguments'] for d in results]:
new_results.append({
'where': hex(func_ea),
'caller_function': caller_func,
'vulnerable_function': idc.get_func_name(func_ea),
'call_address': caller_addr,
'arguments': args,
'type': f'{target_function} -> {idc.get_func_name(func_ea)} command injection'
})
while(self.find_function_xrefs(target_function)):
deep_xrefs = self.find_function_xrefs(target_function)
if deep_xrefs:
for xref in deep_xrefs:
deep_caller_func, deep_caller_addr = xref
head = self.get_function_start_address(idc.get_name_ea_simple(deep_caller_func))
current_func_end = idc.get_func_attr(head, idc.FUNCATTR_END)
while head != idc.BADADDR and head < current_func_end:
if idc.print_insn_mnem(head) == "BL":
next_call_address = idc.get_operand_value(head, 0)
next_call_func_name = idc.get_func_name(next_call_address)
if next_call_func_name and next_call_func_name in sock_func_list:
new_result = ({
'where': target_addr,
'caller_function': deep_caller_func,
'vulnerable_function': target_function,
'call_address': deep_caller_addr,
'arguments': self.get_func_arguments(deep_caller_addr),
'type': f'Also {xref[0]} called {target_function} -> {idc.get_func_name(func_ea)} command injection'
})
if new_result not in new_results:
new_results.append(new_result)
if not self.find_function_xrefs(xref[0]):
start_address = self.get_function_start_address_by_name(xref[0])
final_result = ({
'where': hex(start_address),
'caller_function': deep_caller_func,
'vulnerable_function': f'{xref[0]}',
'call_address': hex(start_address),
'arguments': self.get_func_arguments(self.get_function_start_address_by_name(deep_caller_func)),
'type': f'Start with {xref[0]}, {xref[0]} called {target_function} -> {idc.get_func_name(func_ea)} command injection'
})
if not final_result in new_results:
new_results.append(final_result)
head = idc.next_head(head)
target_function = deep_caller_func
target_addr = deep_caller_addr
results.extend(new_results)
new_results = []
for call_address in read_calls:
head = call_address
while head != idc.BADADDR:
if idc.print_insn_mnem(head) == "BL":
next_call_address = idc.get_operand_value(head, 0)
next_call_func_name = idc.get_func_name(next_call_address)
if next_call_func_name in exec_func_list:
args = []
current_stack = idc.get_spd(call_address)
num_args = 4
for i in range(num_args):
if idc.__EA64__:
arg_value = idc.get_wide_qword(current_stack)
current_stack += 8
else:
arg_value = idc.get_wide_dword(current_stack)
current_stack += 4
args.append(arg_value)
results.append({
'where': read_calls_caller[read_calls.index(call_address)],
'caller_function': idc.get_func_name(call_address),
'vulnerable_function': next_call_func_name,
'call_address': hex(next_call_address),
'arguments': args,
'type': f'Maybe {read_calls_name[0]} command injection'
})
elif next_call_func_name in file_func_list:
args = []
current_stack = idc.get_spd(call_address)
num_args = 4
for i in range(num_args):
arg_value = idc.get_wide_dword(current_stack) if idc.__EA64__ else idc.get_wide_qword(current_stack)
args.append(arg_value)
current_stack += 4 if idc.__EA64__ else 4
results.append({
'where': read_calls_caller[read_calls.index(call_address)],
'caller_function': idc.get_func_name(call_address),
'vulnerable_function': next_call_func_name,
'call_address': hex(next_call_address),
'arguments': args,
'type': f'Maybe {read_calls_name[0]} path traversal (Type 1)'
})
elif next_call_func_name in self.get_user_defined_functions():
args = []
current_stack = idc.get_spd(call_address)
num_args = 4
for i in range(num_args):
arg_value = idc.get_wide_dword(current_stack) if idc.__EA64__ else idc.get_wide_qword(current_stack)
args.append(arg_value)
current_stack += 4 if idc.__EA64__ else 4
results.append({
'where': read_calls_caller[read_calls.index(call_address)],
'caller_function': idc.get_func_name(call_address),
'vulnerable_function': next_call_func_name,
'call_address': hex(next_call_address),
'arguments': args,
'type': f'Tracing {read_calls_name[0]} UDF call to {next_call_func_name} (use for {read_calls_name[0]} path traversal (Parameter sender) advanced search)'
})
head = idc.next_head(head)
return results
def advanced_search_vuln_func(self):
file_func_list = [
'open', 'fopen', 'access', 'stat', 'chdir', 'mkdir', 'rmdir', 'unlink', 'remove', 'rename',
'open64', 'fopen64', 'access64', 'stat64', 'chdir', 'mkdir64', 'rmdir64', 'unlink64', 'remove64', 'rename64'
]
file_func_list += ['.' + func_name for func_name in file_func_list]
results = []
ud_functions = self.get_user_defined_functions()
for call_info in self.search_vuln_func():
if call_info['type'] == 'Maybe exec command injection':
pass
elif call_info['type'] == 'Maybe open path traversal (Type 1)':
where = call_info['where']
func_name = call_info['vulnerable_function']
# func_name = func_name.split('(')[0]
func_ea = idc.get_name_ea_simple(func_name)
if func_name in ud_functions:
for (startea, endea) in idautils.Chunks(func_ea):
for head in idautils.Heads(startea, endea):
if idc.print_insn_mnem(head) == "bl":
call_address = idc.get_operand_value(head, 0)
call_func_name = idc.get_func_name(call_address)
current_stack = idc.get_spd(call_address)
args = []
num_args = 4
for i in range(num_args):
arg_value = idc.get_wide_dword(current_stack) if idc.__EA64__ else idc.get_wide_qword(current_stack)
current_stack += 4 if idc.__EA64__ else 4
args.append(arg_value)
if call_func_name in ud_functions:
for (startea, endea) in idautils.Chunks(call_address):
for head in idautils.Heads(startea, endea):
if idc.print_insn_mnem(head) == "bl":
target_call_address = idc.get_operand_value(head, 0)
target_func_name = idc.get_func_name(target_call_address)
if target_func_name in file_func_list:
results.append({
'where': where,
'caller_function': call_func_name,
'vulnerable_function': f'{target_func_name}, {target_func_name}',
'call_address': call_address,
'arguments': args,
'type': f'Maybe {call_func_name} open path traversal (Parameter sender, File vulnerable)'
})
return results
def display_results(self, results):
self.result_table.setRowCount(len(results))
self.result_table.horizontalHeader().setSectionResizeMode(QtWidgets.QHeaderView.ResizeToContents)
for idx, result in enumerate(results):
self.result_table.setItem(idx, 0, QtWidgets.QTableWidgetItem(result['where']))
self.result_table.setItem(idx, 1, QtWidgets.QTableWidgetItem(result['caller_function']))
self.result_table.setItem(idx, 2, QtWidgets.QTableWidgetItem(result['vulnerable_function']))
self.result_table.setItem(idx, 3, QtWidgets.QTableWidgetItem(result['call_address']))
args_item = QtWidgets.QTableWidgetItem(", ".join(str(arg) for arg in result['arguments']))
args_item.setToolTip(", ".join(str(arg) for arg in result['arguments']))
self.result_table.setItem(idx, 4, args_item)
self.result_table.setItem(idx, 5, QtWidgets.QTableWidgetItem(result['type']))
self.result_table.horizontalHeader().setSectionResizeMode(4, QtWidgets.QHeaderView.Stretch)
def search_and_display_results(self):
results = self.search_vuln_func()
self.display_results(results)
def OnClose(self, form):
pass
plg = Form()
plg.Show("Banalyzer")