def read_mem(addr, forced_addr_sz=None, read_only=False):
global ADDR_SZ
if not read_only:
if forced_addr_sz:
idc.MakeUnknown(addr, forced_addr_sz, idc.DOUNK_SIMPLE)
else:
idc.MakeUnknown(addr, ADDR_SZ, idc.DOUNK_SIMPLE)
idaapi.autoWait()
if forced_addr_sz == 2:
if not read_only:
idc.MakeWord(addr)
idaapi.autoWait()
return idc.Word(addr)
if forced_addr_sz == 4 or ADDR_SZ == 4:
if not read_only:
idc.MakeDword(addr)
idaapi.autoWait()
return idc.Dword(addr)
if forced_addr_sz == 8 or ADDR_SZ == 8:
if not read_only:
idc.MakeQword(addr)
idaapi.autoWait()
return idc.Qword(addr)
def create_string(addr, string_len):
# if idaapi.get_segm_name(addr) is None:
if idc.get_segm_name(addr) is None:
common._debug(
'Cannot load a string which has no segment - not creating string @ 0x%02x'
% addr)
return False
common._debug('Found string load @ 0x%x with length of %d' %
(addr, string_len))
# This may be overly aggressive if we found the wrong area...
if idc.GetStringType(addr) is not None and idc.GetString(
addr) is not None and len(idc.GetString(addr)) != string_len:
common._debug(
'It appears that there is already a string present @ 0x%x' % addr)
idc.MakeUnknown(addr, string_len, idc.DOUNK_SIMPLE)
idaapi.autoWait()
if idc.GetString(addr) is None and idc.MakeStr(addr, addr + string_len):
idaapi.autoWait()
return True
else:
# If something is already partially analyzed (incorrectly) we need to MakeUnknown it
idc.MakeUnknown(addr, string_len, idc.DOUNK_SIMPLE)
idaapi.autoWait()
if idc.MakeStr(addr, addr + string_len):
idaapi.autoWait()
return True
common._debug('Unable to make a string @ 0x%x with length of %d' %
(addr, string_len))
return False
def check_address(address):
# Checks if given address contains virtual table. Returns True if more than 2 function pointers found
# Also if table's addresses point to code in executable section, than tries to make functions at that addresses
if helper.is_code_ea(address):
return False
if not idaapi.get_name(address):
return False
functions_count = 0
while True:
func_address = helper.get_ptr(address)
# print "[INFO] Address 0x{0:08X}".format(func_address)
if helper.is_code_ea(func_address) or helper.is_imported_ea(
func_address):
functions_count += 1
address += const.EA_SIZE
else:
segment = idaapi.getseg(func_address)
if segment and segment.perm & idaapi.SEGPERM_EXEC:
idc.MakeUnknown(func_address, 1, idaapi.DOUNK_SIMPLE)
if idc.MakeFunction(func_address):
functions_count += 1
address += const.EA_SIZE
continue
break
idaapi.autoWait()
return functions_count
def markSwitchTables(self, sc, aggressive=True):
"""Help IDA by marking all of the needed information from the observed switch tables.
Args:
sc (segment): (sark) code segment in which we are interested right now
aggressive (bool, optional): True iff the marking operation should be aggressive, see notes. (True by default)
Notes
-----
1. Make sure the switch case jump instruction is indeed a code line
2. Make sure the jump instruction has a code reference to all of the switch cases
3. (Aggressive) Make sure each switch table entry is a proper code pointer to it's matching case
4. (Aggressive) Enforce the correct code type over the entire gap between the minimal and maximal case
"""
for switch_instr, table_start, table_end in filter(
lambda x: sc.startEA <= x[0] and x[1] < sc.endEA,
self._switch_case_entries):
cases = []
if not sark.Line(switch_instr).is_code:
idc.MakeUnknown(switch_instr, self._analyzer.addressSize(), 0)
idc.MakeCode(switch_instr)
for ea in xrange(table_start, table_end,
self._analyzer.addressSize()):
entry = self._analyzer.parseAdderss(ea)
if aggressive:
self._analyzer.markCodePtr(ea, entry)
fixed_entry = self._analyzer.cleanPtr(entry)
cases.append(fixed_entry)
idc.add_cref(switch_instr, fixed_entry,
idc.XREF_USER | idc.dr_O)
if aggressive:
self._analyzer.setCodeType(min(cases), max(cases),
self._analyzer.ptrCodeType(entry))
def ida_main():
import idc
filepath = idc.AskFile(0, "*.map", "Load a Dolphin emulator symbol map")
if filepath is None:
return
symbol_map = load_dolphin_map(filepath)
for symbol in symbol_map:
addr = int(symbol.vaddr, 16)
size = int(symbol.size, 16)
idc.MakeUnknown(addr, size, 0)
if symbol.section in [".init", ".text"]:
idc.MakeCode(addr)
success = idc.MakeFunction(
addr, idc.BADADDR if not size else (addr + size))
else:
success = idc.MakeData(addr, idc.FF_BYTE, size, 0)
if not success:
idc.Message("Can't apply properties for symbol:"
" {0.vaddr} - {0.name}\n".format(symbol))
flags = idc.SN_NOCHECK | idc.SN_PUBLIC
if symbol.name.startswith("zz_"):
flags |= idc.SN_AUTO | idc.SN_WEAK
else:
flags |= idc.SN_NON_AUTO
idc.MakeNameEx(addr, symbol.name, flags)
def make_array(ea, size):
if ea != idc.BADADDR and ea != 0:
flags = idc.GetFlags(ea)
if not idc.isByte(flags) or idc.ItemSize(ea) != 1:
idc.MakeUnknown(ea, 1, idc.DOUNK_SIMPLE)
idc.MakeByte(ea)
idc.MakeArray(ea, size)
def __find_entry(self, iterate_address):
possible_entry_address = self.__find_entry_jump(iterate_address)
if possible_entry_address == 0 or possible_entry_address == 1:
return 0
elif possible_entry_address == -1:
print("ERROR.FindingEntry: Issue finding entry from " + format_address(hex(iterate_address)) + \
" to " + format_address(hex(self.end_address)) + ".")
return -1
else:
following_landing_address = idc.FindBinary(possible_entry_address, idc.SEARCH_DOWN, LANDING_STRIP)
if following_landing_address == idc.BADADDR or following_landing_address == 0:
# print("ERROR.FindingEntry: Issue finding landing for " + format_address(hex(possible_entry_address)) + ".")
# assume end has not yet been reached, will continue to find the correct macro entry
return 0
else:
# unwrap landing strip as it is usually formatted as data
idc.MakeUnknown(following_landing_address, 2, idc.DOUNK_SIMPLE)
idc.MakeCode(following_landing_address)
# apply logging
possible_jump_location_address = get_jump_destination(possible_entry_address)
log_oreans_macro_information(possible_entry_address, possible_jump_location_address, following_landing_address)
self.macros.append([possible_entry_address, possible_jump_location_address, following_landing_address])
if BUFFER_NOP:
nop(possible_entry_address + 5, following_landing_address)
if BUFFER_HIDE:
hide(possible_entry_address + 5, following_landing_address, BUFFER_NAME, BUFFER_START_NAME, BUFFER_END_NAME)
# change main iterator address with that pass the landing so it will step over macro range
next_macro_search_range_address = following_landing_address + 5
return next_macro_search_range_address
def apply_struct(ea, name, size):
sid = idc.GetStrucIdByName(name)
if (size == -1):
size = idc.GetStrucSize(sid)
idc.MakeUnknown(ea, size, idc.DOUNK_DELNAMES)
idaapi.doStruct(ea, size, sid)
return size
def define(self):
"""
Defines the string in the IDB.
"""
try:
idc.MakeUnknown(self.startEA, self.byte_length, idc.DOUNK_SIMPLE)
idaapi.make_ascii_string(self.startEA, self.byte_length, self.string_type)
except:
append_debug('Unable to define string at 0x%X' % self.startEA)
def read_string(ea):
s = idc.GetString(ea, -1, idc.ASCSTR_C)
if s:
slen = len(s) + 1
idc.MakeUnknown(ea, slen, idc.DOUNK_SIMPLE)
idaapi.make_ascii_string(ea, slen, idc.ASCSTR_C)
return s, ea + slen
else:
return s, ea
def apply_struct(ea, sid, size):
if size == -1:
size = idc.GetStrucSize(sid)
idc.MakeUnknown(ea, size, idc.DOUNK_DELNAMES)
idaapi.doStruct(ea, size, sid)
return size
def markCodePtr(self, src, dest, aggressive=True):
"""Mark a code pointer from src to dest.
Args:
src (int): effective address for the pointer's location
dest (int): effective address for the pointed code address
aggressive (bool, optional): True iff should redefine the src & dest (True by default)
"""
clean_dest = self.cleanPtr(dest)
if aggressive:
idc.MakeUnknown(src, self.addressSize(), 0)
if self.makeAddress(src):
idc.add_dref(src, clean_dest, idc.XREF_USER | idc.dr_O)
idc.add_cref(src, clean_dest, idc.XREF_USER | idc.dr_O)
ida_offset.op_offset(src, 0, idc.REF_OFF32)
if aggressive:
idc.MakeUnknown(dest, self.addressSize(), 0)
idc.MakeCode(self.cleanPtr(dest))
def delCodePtr(self, src, dest):
"""Delete a code pointer (probably was found to be a False Positive).
Args:
src (int) effective address for the pointer's location
dest (int): effective address for the (assumed) pointed code address
"""
idc.del_dref(src, dest)
idc.del_cref(src, dest, 0)
idc.MakeUnknown(src, self.addressSize(), 0)
def markDataPtr(self, src, dest, aggressive=True):
"""Mark a data pointer from src to dest.
Args:
src (int): effective address for the pointer's location
dest (int): effective address for the pointed data address
aggressive (bool, optional): True iff should redefine the src (True by default)
"""
if aggressive:
idc.MakeUnknown(src, self.addressSize(), 0)
if self.makeAddress(src):
idc.add_dref(src, dest, idc.XREF_USER | idc.dr_O)
ida_offset.op_offset(src, 0, idc.REF_OFF32)
def PatchCall(addr):
'''
To improve IDA's analysis, the patch converts call abuse
into push and jmp instructions. The patched data is saved
as a comment.
'''
if idc.Byte(addr) == 0xE8:
logger = logging.getLogger(__name__)
logger.info("Patching push as call @ %x" % addr)
data_size = idc.Dword(addr + 1)
if (data_size) >= 0xfe:
logger.info("Can't patch: 0x%x" % addr)
return
fname = idc.GetFunctionName(addr)
target = idc.GetOperandValue(addr, 0)
data_addr = addr + idautils.DecodeInstruction(addr).size
orig_data = idc.Word(data_addr)
orig_asm = idc.GetDisasm(addr)
idc.MakeUnknown(addr, target - addr,
idaapi.DOUNK_EXPAND | idaapi.DOUNK_DELNAMES)
idc.PatchByte(addr, 0x68)
idc.PatchDword(addr + 1, data_addr)
idc.PatchByte(data_addr, 0xEB)
idc.PatchByte(data_addr + 1, data_size - 2)
# idaapi.analyze_area(addr, data_addr + 2)
uksize = 0
if fname != idc.GetFunctionName(target) and fname is not None:
while uksize < 32:
x = idautils.DecodeInstruction(target + uksize)
if x is None:
break
uksize += x.size
idc.MakeUnknown(target, uksize,
idaapi.DOUNK_EXPAND | idaapi.DOUNK_DELNAMES)
# idaapi.analyze_area(target, target + uksize + 1)
idc.MakeComm(addr, "Original: " + orig_asm)
idc.MakeComm(data_addr, "Original: %x" % orig_data)
def make_str(address):
"""Calculate the length, undefine and make an ascii string."""
# calculate the length, with a hardcoded maximum length
ret = ''
for offset in xrange(MAX_STRING_LENGTH):
ch = idc.GetOriginalByte(address + offset)
if not ch:
break
ret += chr(ch)
idc.MakeUnknown(address, offset, idc.DOUNK_SIMPLE)
idc.MakeStr(address, address + offset)
return ret
def dbg_trace(self, tid, ea):
if ea >> 12 == 0x18f:
self.ctx = 3
if self.ctx == 0:
return 1
self.ctx -= 1
idc.RefreshDebuggerMemory()
idc.MakeUnknown(ea, 20, 0)
idc.MakeCode(ea)
mnem = idc.GetDisasm(ea)
print(hex(ea), mnem)
regs = 'eax ebx ecx edx esi edi eip'.split(' ')
regs = {x: idc.GetRegValue(x) for x in regs}
self.ins.append(Attributize(None, mnem=mnem, **regs))
return 1
def define_string(decoded_string):
'''
Defines a string object in the IDB for the provided string.
Input:
decoded_string - The EncodedString object to define in IDA
'''
try:
idc.MakeUnknown(decoded_string.startEA, decoded_string.byte_length,
idc.DOUNK_SIMPLE)
idaapi.make_ascii_string(decoded_string.startEA,
decoded_string.byte_length,
decoded_string.string_type)
except:
append_debug('Unable to define string at 0x%X' %
decoded_string.startEA)
def defineAsciiString(self, ea):
r"""Define an ascii string at the given address.
Args:
ea (int): effective start address of the wanted ascii string
Return Value:
The length of the defined string + 1 for the '\0' terminator
"""
content = idc.GetString(ea, -1, -1)
if not sark.Line(ea).is_string:
self._analyzer.logger.debug("Defined a unique ascii string at: 0x%x (Length of %d)", ea, len(content) + 1)
idc.MakeUnknown(ea, len(content) + 1, 0)
# Backward compatibility is always fun
if idaapi.IDA_SDK_VERSION <= 700:
idaapi.make_ascii_string(ea, len(content) + 1, idc.ASCSTR_C)
else:
idc.MakeStr(ea, ea + len(content) + 1)
return len(content) + 1
def __find_all_usages(self, name, signature):
sub_instance_counter = 0
current_address = self.start_address
while (current_address != idc.BADADDR or
current_address != 0) and current_address <= self.end_address:
current_address = idc.FindBinary(current_address, idc.SEARCH_DOWN,
signature)
if (current_address != idc.BADADDR or current_address != 0
) and current_address <= self.end_address:
sub_usage_name = "oreans_" + name + "_" + str(
sub_instance_counter)
idc.MakeUnknown(current_address, 6, idc.DOUNK_SIMPLE)
idc.MakeCode(current_address)
label(sub_usage_name, current_address)
log_oreans_blacklist_information(sub_usage_name,
current_address)
self.found_counter += 1
sub_instance_counter += 1
current_address += 1
def resizeRegion(analyzer, start_ea, end_ea, new_start_ea, new_end_ea):
"""Resize a given code region, according to the new dimensions.
Args:
analyzer (instance): analyzer instance to be used
start_ea (int): effective start address of the original region
end_ea (int): effective end address of the original region
new_start_ea (int): effective start address for the new region
new_end_ea (int): effective end address for the new region
"""
analyzer.logger.info(
"Resizing code region of type %d: 0x%x (0x%x) - 0x%x (0x%x)",
analyzer.codeType(start_ea), new_start_ea, start_ea, end_ea,
new_end_ea)
code_type_before = analyzer.codeType(min(start_ea, new_start_ea) - 1)
code_type_middle = analyzer.codeType(start_ea)
code_type_after = analyzer.codeType(max(end_ea, new_end_ea))
# Make sure it will be treated as code
fix_regions = []
if new_start_ea < start_ea:
fix_regions.append((new_start_ea, start_ea))
elif new_start_ea != start_ea:
fix_regions.append((start_ea, new_start_ea))
if end_ea < new_end_ea:
fix_regions.append((end_ea, new_end_ea))
elif end_ea != new_end_ea:
fix_regions.append((new_end_ea, end_ea))
# Make the changed parts unknown, before re-analyzing them
for region_start, region_end in fix_regions:
idc.MakeUnknown(region_start, region_end - region_start, 0)
# manually set the wanted value over the entire region
if start_ea < new_start_ea:
analyzer.setCodeType(start_ea, new_start_ea, code_type_before)
elif start_ea != new_start_ea:
analyzer.setCodeType(new_start_ea, start_ea, code_type_middle)
if end_ea < new_end_ea:
analyzer.setCodeType(end_ea, new_end_ea, code_type_middle)
elif end_ea != new_end_ea:
analyzer.setCodeType(new_end_ea, end_ea, code_type_after)
# now reanalyze the new section
for region_start, region_end in fix_regions:
idaapi.analyze_area(region_start, region_end)
def convertRegion(analyzer, start_ea, end_ea):
"""Convert (Cancel) a given code region (change it's code type).
Args:
analyzer (instance): analyzer instance to be used
start_ea (int): effective start address of the region
end_ea (int): effective end address of the region
"""
wanted_code_type = analyzer.codeType(end_ea)
analyzer.logger.info(
"Converting code region of type %d to %d: 0x%x - 0x%x (%d)",
analyzer.codeType(start_ea), wanted_code_type, start_ea, end_ea,
end_ea - start_ea)
# Make sure it will be treated as code
idc.MakeUnknown(start_ea, end_ea - start_ea, 0)
# manually set the wanted value over the entire region
analyzer.setCodeType(start_ea, end_ea, wanted_code_type)
# now reanalyze the new section
idaapi.analyze_area(
analyzer.alignTransitionAddress(start_ea, wanted_code_type), end_ea)
def rename(beg, ptr, make_funcs=True):
base = beg
pos = beg + 8 #skip header
size = ptr.ptr(pos)
pos += ptr.size
end = pos + (size * ptr.size * 2)
print "%x" % end
while pos < end:
offset = ptr.ptr(pos + ptr.size)
ptr.maker(pos) #in order to get xrefs
ptr.maker(pos + ptr.size)
pos += ptr.size * 2
ptr.maker(base + offset)
func_addr = ptr.ptr(base + offset)
if make_funcs == True:
idc.MakeUnknown(func_addr, 1, idc.DOUNK_SIMPLE)
idc.MakeFunction(func_addr)
name_offset = idc.Dword(base + offset + ptr.size)
name = idc.GetString(base + name_offset)
name = Utils.relaxName(name)
Utils.rename(func_addr, name)
def check_address(address):
# Checks if given address contains virtual table. Returns True if more than 2 function pointers found
# Also if table's addresses point to code in executable section, than tries to make functions at that addresses
functions_count = 0
while True:
func_address = idaapi.get_64bit(address) if Const.EA64 else idaapi.get_32bit(address)
flags = idaapi.getFlags(func_address) # flags_t
# print "[INFO] Address 0x{0:08X}".format(func_address)
if idaapi.isCode(flags):
functions_count += 1
address += Const.EA_SIZE
else:
segment = idaapi.getseg(func_address)
if segment and segment.perm & idaapi.SEGPERM_EXEC:
idc.MakeUnknown(func_address, 1, idaapi.DOUNK_SIMPLE)
if idc.MakeFunction(func_address):
functions_count += 1
address += Const.EA_SIZE
continue
break
idaapi.autoWait()
return functions_count
def apply_struct(objname, address):
"""Apply a Structure to an address."""
structure = _struct_by_name(objname)
size = ctypes.sizeof(structure)
# it is known
idc.MakeUnknown(address, size, idc.DOUNK_SIMPLE)
idc.MakeStruct(address, objname)
# read the structure and return that data
data = (idc.GetOriginalByte(x) for x in xrange(address, address + size))
_ret = structure.from_buffer_copy(''.join(chr(x) for x in data))
class _Structure:
pass
ret = _Structure()
offset = 0
for name, typ in structure._fields_:
# pointer to an ascii string
if typ == ctypes.c_char_p:
value = idc.Dword(address + offset)
setattr(ret, name, make_str(value))
# pointer to an unicode string
elif typ == ctypes.c_wchar_p:
# TODO implement unicode string stuff
pass
# this is a pointer to another structure
elif hasattr(typ, 'contents'):
_name = _registered_structures[typ._type_][0]
_addr = idc.Dword(address + offset)
setattr(ret, name, apply_struct(_name, _addr))
else:
setattr(ret, name, getattr(_ret, name))
offset += ctypes.sizeof(typ)
return ret
def __seek(self):
# Method 2 (reversal approach) one of the most accurate methods
current_address = self.start_address
while current_address < self.end_address:
current_address = idc.FindBinary(current_address, idc.SEARCH_DOWN,
LANDING_STRIP)
presumed_landing_address = current_address
if presumed_landing_address == idc.BADADDR or presumed_landing_address == 0:
# have reached the end
break
else:
# [macro + [macro + normal]] renders (macro + normal) usually not interp'd by ida
idc.MakeUnknown(presumed_landing_address, 2, idc.DOUNK_SIMPLE)
idc.MakeCode(presumed_landing_address)
zoning_address = presumed_landing_address
next_iter = 0
if len(self.macros) > 0:
# finding following macro...
entry_search_limit_address = (self.macros[-1])[2]
next_iter = self.__find_entry(entry_search_limit_address,
zoning_address,
presumed_landing_address)
else:
# landing is above start, finding first macro...
next_iter = self.__find_entry(self.start_address,
zoning_address,
presumed_landing_address)
if next_iter == 0:
print(
"ERROR.SeekingIteration: Issue obtaining a valid macro block to search from."
)
break
else:
current_address = next_iter
print("============================================================")
def undefine(start, end):
idc.MakeUnknown(start, end - start, idc.DOUNK_SIMPLE)
def write_data(ea, blob, reanalyze=True):
""" Write bytes to idb """
if reanalyze: idc.MakeUnknown(ea, len(blob), 0)
idaapi.patch_many_bytes(ea, blob)
if reanalyze: idc.MakeCode(ea)
def reset():
idc.MakeUnknown(idc.MinEA(), 0x1000, 0)
for i in range(0x1000):
idc.PatchByte(idc.MinEA() + i, 0)
def make_string(addr, siz):
print("Creating string at %x %d size" % (addr, siz))
idc.MakeUnknown(addr, siz, idc.DOUNK_SIMPLE)
ida_bytes.create_strlit(addr, siz, -1)
