/usr/bin/evtx_structure.py is in python-evtx 0.6.1-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 | #!/usr/bin/python
# This file is part of python-evtx.
#
# Copyright 2012, 2013 Willi Ballenthin <william.ballenthin@mandiant.com>
# while at Mandiant <http://www.mandiant.com>
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import Evtx.Evtx as evtx
import Evtx.Nodes as e_nodes
class EvtxFormatter(object):
def __init__(self):
super(EvtxFormatter, self).__init__()
self._indent_stack = []
self._indent_unit = " "
def _indent(self):
self._indent_stack.append(self._indent_unit)
def _dedent(self):
if len(self._indent_stack) > 0:
self._indent_stack = self._indent_stack[:-1]
def save_indent(self):
return self._indent_stack[:]
def restore_indent(self, indent):
self._indent_stack = indent
def _l(self, s):
return "".join(self._indent_stack) + s
def format_header(self, fh):
yield self._l("File header")
self._indent()
yield self._l("magic: %s" % (fh.magic()))
for num_field in [
"oldest_chunk",
"current_chunk_number",
"next_record_number",
"header_size",
"minor_version",
"major_version",
"header_chunk_size",
"chunk_count",
"flags",
"checksum"]:
yield self._l("%s: %s" % (num_field, hex(getattr(fh, num_field)())))
yield self._l("verify: %s" % (fh.verify()))
yield self._l("dirty: %s" % (fh.is_dirty()))
yield self._l("full: %s" % (fh.is_full()))
for chunk in fh.chunks():
for line in self.format_chunk(chunk):
yield line
self._dedent()
def format_chunk(self, chunk):
yield self._l("Chunk")
self._indent()
yield self._l("offset: %s" % (hex(chunk.offset())))
yield self._l("magic: %s" % (chunk.magic()))
for num_field in [
"file_first_record_number",
"file_last_record_number",
"log_first_record_number",
"log_last_record_number",
"header_size",
"last_record_offset",
"next_record_offset",
"data_checksum",
"header_checksum"]:
yield self._l("%s: %s" % (num_field, hex(getattr(chunk, num_field)())))
yield self._l("verify: %s" % (chunk.verify()))
yield self._l("templates: %d" % (len(chunk.templates())))
for record in chunk.records():
for line in self.format_record(record):
yield line
self._dedent()
def format_record(self, record):
yield self._l("Record")
self._indent()
yield self._l("offset: %s" % (hex(record.offset())))
yield self._l("magic: %s" % (hex(record.magic())))
yield self._l("size: %s" % (hex(record.size())))
yield self._l("number: %s" % (hex(record.record_num())))
yield self._l("timestamp: %s" % (record.timestamp()))
yield self._l("verify: %s" % (record.verify()))
try:
s = self.save_indent()
for line in self.format_node(record, record.root()):
yield line
except Exception as e:
self.restore_indent(s)
yield "ERROR: " + str(e)
self._dedent()
def _format_node_name(self, record, node, extra=None):
"""
note: this doesn't yield, it returns
"""
line = ""
if extra is not None:
line = "%s(offset=%s, %s)" % (node.__class__.__name__, hex(node.offset() - record.offset()), extra)
else:
line = "%s(offset=%s)" % (node.__class__.__name__, hex(node.offset() - record.offset()))
if isinstance(node, e_nodes.VariantTypeNode):
line += " --> %s" % (node.string())
if isinstance(node, e_nodes.OpenStartElementNode):
line += " --> %s" % (node.tag_name())
if isinstance(node, e_nodes.AttributeNode):
line += " --> %s" % (node.attribute_name().string())
return line
def format_node(self, record, node):
extra = None
if isinstance(node, e_nodes.TemplateInstanceNode) and node.is_resident_template():
extra = "resident=True, length=%s" % (hex(node.template().data_length()))
elif isinstance(node, e_nodes.TemplateInstanceNode):
extra = "resident=False"
yield self._l(self._format_node_name(record, node, extra=extra))
if isinstance(node, e_nodes.BXmlTypeNode):
self._indent()
for line in self.format_node(record, node._root):
yield line
self._dedent()
elif isinstance(node, e_nodes.TemplateInstanceNode) and node.is_resident_template():
self._indent()
for line in self.format_node(record, node.template()):
yield line
self._dedent()
self._indent()
for child in node.children():
for line in self.format_node(record, child):
yield line
self._dedent()
if isinstance(node, e_nodes.RootNode):
ofs = node.tag_and_children_length()
yield self._l("Substitutions(offset=%s)" % (hex(node.offset() - record.offset() + ofs)))
self._indent()
for sub in node.substitutions():
for line in self.format_node(record, sub):
yield line
self._dedent()
def main():
import argparse
parser = argparse.ArgumentParser(
description="Dump the structure of an EVTX file.")
parser.add_argument("evtx", type=str,
help="Path to the Windows EVTX event log file")
args = parser.parse_args()
with evtx.Evtx(args.evtx) as log:
formatter = EvtxFormatter()
for line in formatter.format_header(log.get_file_header()):
print(line)
if __name__ == "__main__":
main()
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