mirror of
https://github.com/volatilityfoundation/volatility
synced 2026-06-08 18:04:46 +00:00
Andrew C
124 lines
4.5 KiB
Python
124 lines
4.5 KiB
Python
# Volatility
|
|
# Copyright (C) 2007-2013 Volatility Foundation
|
|
#
|
|
# This file is part of Volatility.
|
|
#
|
|
# Volatility is free software; you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License Version 2 as
|
|
# published by the Free Software Foundation. You may not use, modify or
|
|
# distribute this program under any other version of the GNU General
|
|
# Public License.
|
|
#
|
|
# Volatility is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with Volatility. If not, see <http://www.gnu.org/licenses/>.
|
|
#
|
|
|
|
"""
|
|
@author: Andrew Case
|
|
@license: GNU General Public License 2.0
|
|
@contact: atcuno@gmail.com
|
|
@organization:
|
|
"""
|
|
|
|
import volatility.obj as obj
|
|
import volatility.debug as debug
|
|
import volatility.addrspace as addrspace
|
|
import volatility.plugins.linux.common as linux_common
|
|
import volatility.plugins.linux.pslist as linux_pslist
|
|
|
|
class linux_process_hollow(linux_pslist.linux_pslist):
|
|
"""Checks for signs of process hollowing"""
|
|
|
|
def __init__(self, config, *args, **kwargs):
|
|
linux_pslist.linux_pslist.__init__(self, config, *args, **kwargs)
|
|
self._config.add_option('BASE', short_option = 'b', default = None, help = 'The address of the ELF file in memory', action = 'store', type='long' )
|
|
self._config.add_option('PATH', short_option = 'P', default = None, help = 'The path of the known good file', action = 'store', type='str')
|
|
|
|
# TODO:
|
|
# make aware of if application or library
|
|
# check the class, then do offset + base based on that
|
|
def calculate(self):
|
|
linux_common.set_plugin_members(self)
|
|
|
|
if not self._config.BASE:
|
|
debug.error("No base address specified.")
|
|
|
|
if not self._config.PATH:
|
|
debug.error("No known-good path specified.")
|
|
|
|
fd = open(self._config.PATH, "rb")
|
|
known_good = fd.read()
|
|
fd.close()
|
|
|
|
bufferas = addrspace.BufferAddressSpace(self._config, data = known_good)
|
|
elf_hdr = obj.Object("elf_hdr", offset = 0, vm = bufferas)
|
|
|
|
tasks = linux_pslist.linux_pslist.calculate(self)
|
|
|
|
for task in tasks:
|
|
proc_as = task.get_process_address_space()
|
|
|
|
for vma in task.get_proc_maps():
|
|
if self._config.BASE != vma.vm_start:
|
|
continue
|
|
|
|
for sym in elf_hdr.symbols():
|
|
if sym.st_value == 0 or (sym.st_info & 0xf) != 2:
|
|
continue
|
|
|
|
symname = elf_hdr.symbol_name(sym)
|
|
|
|
sym_offset = sym.st_value
|
|
|
|
# in the same vma
|
|
if vma.vm_start < sym.st_value < vma.vm_end:
|
|
vm_start = vma.vm_start
|
|
sym_offset = sym_offset - vm_start
|
|
full_address = sym.st_value
|
|
else:
|
|
next_vma = vma.vm_next
|
|
if next_vma.vm_start < sym.st_value < next_vma.vm_end:
|
|
vm_start = next_vma.vm_start
|
|
sym_offset = sym.st_value - vm_start
|
|
full_address = sym.st_value
|
|
else:
|
|
full_address = vma.vm_start + sym.st_value
|
|
|
|
mem_buffer = proc_as.read(vm_start + sym_offset, sym.st_size)
|
|
|
|
if sym.st_value > vma.vm_start:
|
|
disk_off = sym.st_value - vm_start
|
|
else:
|
|
disk_off = sym.st_value
|
|
|
|
disk_buffer = bufferas.read(disk_off, sym.st_size)
|
|
|
|
# bad
|
|
if mem_buffer != None and disk_buffer != mem_buffer:
|
|
yield task, symname, full_address
|
|
elif mem_buffer == None:
|
|
print "Function %s paged out in memory" % symname
|
|
|
|
def render_text(self, outfd, data):
|
|
self.table_header(outfd, [("Task", "16"),
|
|
("PID", "6"),
|
|
("Symbol Name", "32"),
|
|
("Symbol Address", "[addrpad]"),
|
|
])
|
|
for (task, symname, address) in data:
|
|
self.table_row(outfd, str(task.comm), task.pid, symname, address)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|