mirror of
https://github.com/volatilityfoundation/volatility
synced 2026-06-08 18:04:46 +00:00
Andrew C
304 lines
10 KiB
Python
304 lines
10 KiB
Python
# Volatility
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# Copyright (C) 2007-2013 Volatility Foundation
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#
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# This file is part of Volatility.
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#
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# Volatility is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License Version 2 as
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# published by the Free Software Foundation. You may not use, modify or
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# distribute this program under any other version of the GNU General
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# Public License.
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#
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# Volatility is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Volatility. If not, see <http://www.gnu.org/licenses/>.
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#
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"""
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@author: Andrew Case
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@license: GNU General Public License 2.0
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@contact: atcuno@gmail.com
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@organization:
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"""
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import struct
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import volatility.obj as obj
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import volatility.debug as debug
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import volatility.plugins.mac.common as mac_common
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import volatility.plugins.mac.pslist as mac_pslist
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mac_bash_hash_vtypes = {
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'mac32_pathdata' : [ 8, {
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'path' : [0x0, ['pointer', ['String', dict(length = 1024)]]],
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'flags': [0x4, ['int']],
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}],
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'mac32_bucket_contents' : [ 20, {
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'next' : [0x0, ['pointer', ['mac32_bucket_contents']]],
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'key' : [0x4, ['pointer', ['String', dict(length = 1024)]]],
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'data' : [0x8, ['pointer', ['mac32_pathdata']]],
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'times_found' : [16, ['int']],
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}],
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'mac32_bash_hash_table': [ 0xc, {
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'bucket_array': [0x0, ['pointer', ['mac32_bucket_contents']]],
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'nbuckets': [0x4, ['int']],
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'nentries': [0x8, ['int']],
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}],
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'mac64_pathdata' : [ 12, {
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'path' : [0x0, ['pointer', ['String', dict(length = 1024)]]],
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'flags': [0x8, ['int']],
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}],
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'mac64_bucket_contents' : [ 32, {
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'next' : [0, ['pointer', ['mac64_bucket_contents']]],
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'key' : [8, ['pointer', ['String', dict(length = 1024)]]],
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'data' : [16, ['pointer', ['mac64_pathdata']]],
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'times_found' : [28, ['int']],
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}],
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'mac64_bash_hash_table': [ 16, {
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'bucket_array': [0, ['pointer', ['mac64_bucket_contents']]],
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'nbuckets': [8, ['int']],
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'nentries': [12, ['int']],
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}],
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}
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class bash_funcs(obj.CType):
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def __init__(self, ptr_size, theType, offset, vm, name = None, **kwargs):
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self.ptr_size = ptr_size
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obj.CType.__init__(self, theType, offset, vm, name, **kwargs)
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@property
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def path(self):
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addr = self.m("path").obj_offset
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addr = self.read_ptr(addr)
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ret = ""
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if addr:
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ret = self.obj_vm.read(addr, 256)
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if ret:
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idx = ret.find("\x00")
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if idx != -1:
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ret = ret[:idx]
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return ret
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def next_bucket(self):
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addr = self.m("next").obj_offset
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addr = self.read_ptr(addr)
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if self.ptr_size == 32:
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ptype = "mac32_bucket_contents"
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else:
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ptype = "mac64_bucket_contents"
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return obj.Object(ptype, offset = addr, vm = self.obj_vm)
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@property
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def key(self):
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addr = self.m("key").obj_offset
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addr = self.read_ptr(addr)
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ret = ""
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if addr:
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ret = self.obj_vm.read(addr, 256)
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if ret:
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idx = ret.find("\x00")
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if idx != -1:
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ret = ret[:idx]
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return ret
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@property
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def data(self):
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addr = self.m("data").obj_offset
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addr = self.read_ptr(addr)
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if self.ptr_size == 32:
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ptype = "mac32_pathdata"
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else:
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ptype = "mac64_pathdata"
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return obj.Object(ptype, offset = addr, vm = self.obj_vm)
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@property
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def bucket_array(self):
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addr = self.m("bucket_array").obj_offset
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return self.read_ptr(addr)
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def read_ptr_32(self, addr):
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addr = self.obj_vm.read(addr, 4)
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addr = struct.unpack("<I", addr)[0]
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return addr
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def read_ptr_64(self, addr):
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addr = self.obj_vm.read(addr, 8)
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addr = struct.unpack("<Q", addr)[0]
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return addr
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def read_ptr(self, addr):
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if self.ptr_size == 32:
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ret = self.read_ptr_32(addr)
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else:
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ret = self.read_ptr_64(addr)
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return ret
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class mac64_bash_hash_table(bash_funcs):
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def __init__(self, theType, offset, vm, name = None, **kwargs):
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bash_funcs.__init__(self, 64, theType, offset, vm, name, **kwargs)
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def is_valid(self):
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if (not obj.CType.is_valid(self) or
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not self.obj_vm.is_valid_address(self.bucket_array) or
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not self.nbuckets == 64 or
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not self.nentries > 1):
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return False
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return True
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class mac32_bash_hash_table(bash_funcs):
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def __init__(self, theType, offset, vm, name = None, **kwargs):
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bash_funcs.__init__(self, 32, theType, offset, vm, name, **kwargs)
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def is_valid(self):
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if (not obj.CType.is_valid(self) or
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not self.obj_vm.is_valid_address(self.bucket_array) or
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not self.nbuckets == 64 or
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not self.nentries > 1):
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return False
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return True
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class mac64_pathdata(bash_funcs):
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def __init__(self, theType, offset, vm, name = None, **kwargs):
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bash_funcs.__init__(self, 64, theType, offset, vm, name, **kwargs)
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class mac32_pathdata(bash_funcs):
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def __init__(self, theType, offset, vm, name = None, **kwargs):
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bash_funcs.__init__(self, 32, theType, offset, vm, name, **kwargs)
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class mac64_bucket_contents(bash_funcs):
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def __init__(self, theType, offset, vm, name = None, **kwargs):
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bash_funcs.__init__(self, 64, theType, offset, vm, name, **kwargs)
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class mac32_bucket_contents(bash_funcs):
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def __init__(self, theType, offset, vm, name = None, **kwargs):
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bash_funcs.__init__(self, 32, theType, offset, vm, name, **kwargs)
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class MacBashHashTypes(obj.ProfileModification):
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conditions = {"os" : lambda x : x in ["mac"]}
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def modification(self, profile):
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profile.vtypes.update(mac_bash_hash_vtypes)
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profile.object_classes.update({
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"mac32_bucket_contents" : mac32_bucket_contents,
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"mac64_bucket_contents" : mac64_bucket_contents,
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"mac32_pathdata" : mac32_pathdata,
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"mac64_pathdata" : mac64_pathdata,
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"mac32_bash_hash_table" : mac32_bash_hash_table,
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"mac64_bash_hash_table" : mac64_bash_hash_table,
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})
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class mac_bash_hash(mac_pslist.mac_pslist):
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"""Recover bash hash table from bash process memory"""
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def __init__(self, config, *args, **kwargs):
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mac_pslist.mac_pslist.__init__(self, config, *args, **kwargs)
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self._config.add_option('SCAN_ALL', short_option = 'A', default = False, help = 'scan all processes, not just those named bash', action = 'store_true')
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def calculate(self):
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mac_common.set_plugin_members(self)
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tasks = mac_pslist.mac_pslist(self._config).calculate()
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for task in tasks:
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proc_as = task.get_process_address_space()
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# In cases when mm is an invalid pointer
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if not proc_as:
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continue
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# Do we scan everything or just /bin/bash instances?
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if not (self._config.SCAN_ALL or str(task.p_comm) == "bash"):
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continue
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bit_string = str(task.task.map.pmap.pm_task_map or '')[9:]
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if bit_string.find("64BIT") == -1:
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addr_type = "unsigned int"
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bucket_contents_type = "mac32_bucket_contents"
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htable_type = "mac32_bash_hash_table"
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nbuckets_offset = self.addr_space.profile.get_obj_offset(htable_type, "nbuckets")
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else:
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addr_type = "unsigned long long"
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bucket_contents_type = "mac64_bucket_contents"
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htable_type = "mac64_bash_hash_table"
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nbuckets_offset = self.addr_space.profile.get_obj_offset(htable_type, "nbuckets")
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proc_as = task.get_process_address_space()
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for map in task.get_proc_maps():
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if map.get_path() != "":
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continue
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off = map.start
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while off < map.end:
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# test the number of buckets
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dr = proc_as.read(off + nbuckets_offset, 4)
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if dr == None:
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new_off = (off & ~0xfff) + 0xfff + 1
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off = new_off
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continue
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test = struct.unpack("<I", dr)[0]
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if test != 64:
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off = off + 1
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continue
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htable = obj.Object(htable_type, offset = off, vm = proc_as)
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if htable.is_valid():
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bucket_array = obj.Object(theType="Array", targetType=addr_type, offset = htable.bucket_array, vm = htable.nbuckets.obj_vm, count = 64)
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for bucket_ptr in bucket_array:
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bucket = obj.Object(bucket_contents_type, offset = bucket_ptr, vm = htable.nbuckets.obj_vm)
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while bucket != None and bucket.times_found > 0:
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pdata = bucket.data
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if pdata == None:
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bucket = bucket.next_bucket()
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continue
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if pdata.is_valid() and (0 <= pdata.flags <= 2):
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yield task, bucket
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bucket = bucket.next_bucket()
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off = off + 1
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def render_text(self, outfd, data):
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self.table_header(outfd, [("Pid", "8"),
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("Name", "20"),
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("Hits", "6"),
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("Command", "25"),
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("Full Path", "")])
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for task, bucket in data:
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self.table_row(outfd, task.p_pid, task.p_comm,
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bucket.times_found,
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str(bucket.key),
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str(bucket.data.path))
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