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137 lines
4.8 KiB
Python
137 lines
4.8 KiB
Python
# This file is Copyright 2019 Volatility Foundation and licensed under the Volatility Software License 1.0
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# which is available at https://www.volatilityfoundation.org/license/vsl-v1.0
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#
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"""A module containing a collection of plugins that produce data typically
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found in Linux's /proc file system."""
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import datetime
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import struct
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from typing import List
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from volatility3.framework import constants, renderers, symbols, interfaces
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from volatility3.framework.configuration import requirements
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from volatility3.framework.interfaces import plugins
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from volatility3.framework.layers import scanners
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from volatility3.framework.objects import utility
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from volatility3.framework.symbols.linux.bash import BashIntermedSymbols
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from volatility3.plugins import timeliner
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from volatility3.plugins.linux import pslist
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class Bash(plugins.PluginInterface, timeliner.TimeLinerInterface):
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"""Recovers bash command history from memory."""
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_required_framework_version = (2, 0, 0)
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@classmethod
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def get_requirements(cls) -> List[interfaces.configuration.RequirementInterface]:
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return [
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requirements.ModuleRequirement(
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name="kernel",
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description="Linux kernel",
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architectures=["Intel32", "Intel64"],
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),
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requirements.PluginRequirement(
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name="pslist", plugin=pslist.PsList, version=(2, 0, 0)
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),
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requirements.ListRequirement(
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name="pid",
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element_type=int,
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description="Process IDs to include (all other processes are excluded)",
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optional=True,
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),
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]
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def _generator(self, tasks):
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vmlinux = self.context.modules[self.config["kernel"]]
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is_32bit = not symbols.symbol_table_is_64bit(
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self.context, vmlinux.symbol_table_name
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)
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if is_32bit:
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pack_format = "I"
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bash_json_file = "bash32"
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else:
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pack_format = "Q"
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bash_json_file = "bash64"
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bash_table_name = BashIntermedSymbols.create(
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self.context, self.config_path, "linux", bash_json_file
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)
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ts_offset = self.context.symbol_space.get_type(
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bash_table_name + constants.BANG + "hist_entry"
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).relative_child_offset("timestamp")
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for task in tasks:
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task_name = utility.array_to_string(task.comm)
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if task_name not in ["bash", "sh", "dash"]:
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continue
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proc_layer_name = task.add_process_layer()
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if not proc_layer_name:
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continue
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proc_layer = self.context.layers[proc_layer_name]
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bang_addrs = []
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# find '#' values on the heap
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for address in proc_layer.scan(
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self.context,
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scanners.BytesScanner(b"#"),
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sections=task.get_process_memory_sections(heap_only=True),
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):
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bang_addrs.append(struct.pack(pack_format, address))
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history_entries = []
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if bang_addrs:
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for address, _ in proc_layer.scan(
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self.context,
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scanners.MultiStringScanner(bang_addrs),
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sections=task.get_process_memory_sections(heap_only=True),
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):
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hist = self.context.object(
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bash_table_name + constants.BANG + "hist_entry",
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offset=address - ts_offset,
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layer_name=proc_layer_name,
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)
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if hist.is_valid():
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history_entries.append(hist)
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for hist in sorted(history_entries, key=lambda x: x.get_time_as_integer()):
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yield (
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0,
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(task.pid, task_name, hist.get_time_object(), hist.get_command()),
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)
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def run(self):
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filter_func = pslist.PsList.create_pid_filter(self.config.get("pid", None))
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return renderers.TreeGrid(
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[
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("PID", int),
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("Process", str),
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("CommandTime", datetime.datetime),
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("Command", str),
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],
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self._generator(
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pslist.PsList.list_tasks(
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self.context, self.config["kernel"], filter_func=filter_func
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)
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),
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)
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def generate_timeline(self):
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filter_func = pslist.PsList.create_pid_filter(self.config.get("pid", None))
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for row in self._generator(
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pslist.PsList.list_tasks(
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self.context, self.config["kernel"], filter_func=filter_func
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)
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):
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_depth, row_data = row
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description = f'{row_data[0]} ({row_data[1]}): "{row_data[3]}"'
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yield (description, timeliner.TimeLinerType.CREATED, row_data[2])
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