/usr/lib/python2.7/dist-packages/rekall/plugins/response/yarascan.py is in python-rekall-core 1.6.0+dfsg-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Copyright (c) 2012, Michael Cohen <scudette@gmail.com>
# Copyright (c) 2010, 2011, 2012 Michael Ligh <michael.ligh@mnin.org>
# Copyright 2013 Google Inc. All Rights Reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or (at
# your option) any later version.
#
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
from rekall import addrspace
from rekall import utils
from rekall.plugins import yarascanner
from rekall.plugins.addrspaces import standard
from rekall.plugins.response import common
class FileYaraScanner(yarascanner.YaraScanMixin,
common.AbstractIRCommandPlugin):
"""Yara scanner which operates on files."""
name = "file_yara"
__args = [
dict(name="paths", positional=True, type="Array",
help="Paths to scan."),
]
def collect(self):
count = 0
for path in self.plugin_args.paths:
self.session.logging.debug("File yara scanning %s", path)
file_info = common.FileFactory(path, session=self.session)
run = addrspace.Run(start=0, end=file_info.st_size,
file_offset=0,
address_space=standard.FDAddressSpace(
session=self.session,
fhandle=file_info.open()))
for rule, address in self.generate_hits(run):
count += 1
if count >= self.plugin_args.hits:
break
yield (file_info,
rule, address,
utils.HexDumpedString(
run.address_space.read(
address - self.plugin_args.pre_context,
self.plugin_args.context +
self.plugin_args.pre_context)), None)
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