# This file is Copyright 2019 Volatility Foundation and licensed under the Volatility Software License 1.0
# which is available at https://www.volatilityfoundation.org/license/vsl-v1.0
#
from volatility3.framework import interfaces
from volatility3.framework import renderers
from volatility3.framework.configuration import requirements
from volatility3.framework.objects import utility
from volatility3.framework.renderers import format_hints
from volatility3.plugins.mac import pslist
[docs]class Malfind(interfaces.plugins.PluginInterface):
"""Lists process memory ranges that potentially contain injected code."""
_required_framework_version = (2, 0, 0)
[docs] @classmethod
def get_requirements(cls):
return [
requirements.ModuleRequirement(
name="kernel",
description="Kernel module for the OS",
architectures=["Intel32", "Intel64"],
),
requirements.PluginRequirement(
name="pslist", plugin=pslist.PsList, version=(3, 0, 0)
),
requirements.ListRequirement(
name="pid",
description="Filter on specific process IDs",
element_type=int,
optional=True,
),
]
def _list_injections(self, task):
"""Generate memory regions for a process that may contain injected
code."""
proc_layer_name = task.add_process_layer()
if proc_layer_name is None:
return None
proc_layer = self.context.layers[proc_layer_name]
for vma in task.get_map_iter():
if not vma.is_suspicious(
self.context,
self.context.modules[self.config["kernel"]].symbol_table_name,
):
data = proc_layer.read(vma.links.start, 64, pad=True)
yield vma, data
def _generator(self, tasks):
# determine if we're on a 32 or 64 bit kernel
if self.context.modules[self.config["kernel"]].get_type("pointer").size == 4:
is_32bit_arch = True
else:
is_32bit_arch = False
for task in tasks:
process_name = utility.array_to_string(task.p_comm)
for vma, data in self._list_injections(task):
if is_32bit_arch:
architecture = "intel"
else:
architecture = "intel64"
disasm = interfaces.renderers.Disassembly(
data, vma.links.start, architecture
)
yield (
0,
(
task.p_pid,
process_name,
format_hints.Hex(vma.links.start),
format_hints.Hex(vma.links.end),
vma.get_perms(),
format_hints.HexBytes(data),
disasm,
),
)
[docs] def run(self):
filter_func = pslist.PsList.create_pid_filter(self.config.get("pid", None))
list_tasks = pslist.PsList.get_list_tasks(
self.config.get("pslist_method", pslist.PsList.pslist_methods[0])
)
return renderers.TreeGrid(
[
("PID", int),
("Process", str),
("Start", format_hints.Hex),
("End", format_hints.Hex),
("Protection", str),
("Hexdump", format_hints.HexBytes),
("Disasm", interfaces.renderers.Disassembly),
],
self._generator(
list_tasks(self.context, self.config["kernel"], filter_func=filter_func)
),
)