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# This is a generated file! Please edit source .ksy file and use kaitai-struct-compiler to rebuild
from pkg_resources import parse_version
from .kaitaistruct import __version__ as ks_version, KaitaiStruct, KaitaiStream, BytesIO
import collections
from enum import Enum
if parse_version(ks_version) < parse_version('0.7'):
raise Exception("Incompatible Kaitai Struct Python API: 0.7 or later is required, but you have %s" % (ks_version))
class WindowsEvtLog(KaitaiStruct):
"""EVT files are Windows Event Log files written by older Windows
operating systems (2000, XP, 2003). They are used as binary log
files by several major Windows subsystems and
applications. Typically, several of them can be found in
`%WINDIR%\system32\config` directory:
* Application = `AppEvent.evt`
* System = `SysEvent.evt`
* Security = `SecEvent.evt`
Alternatively, one can export any system event log as distinct .evt
file using relevant option in Event Viewer application.
A Windows application can submit an entry into these logs using
[ReportEvent](https://msdn.microsoft.com/en-us/library/aa363679(v=vs.85).aspx)
function of Windows API.
Internally, EVT files consist of a fixed-size header and event
records. There are several usage scenarios (non-wrapping vs wrapping
log files) which result in slightly different organization of
records.
.. seealso::
Source - https://msdn.microsoft.com/en-us/library/bb309026(v=vs.85).aspx
"""
SEQ_FIELDS = ["header", "records"]
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
self._debug['header']['start'] = self._io.pos()
self.header = self._root.Header(self._io, self, self._root)
self.header._read()
self._debug['header']['end'] = self._io.pos()
self._debug['records']['start'] = self._io.pos()
self.records = []
i = 0
while not self._io.is_eof():
if not 'arr' in self._debug['records']:
self._debug['records']['arr'] = []
self._debug['records']['arr'].append({'start': self._io.pos()})
_t_records = self._root.Record(self._io, self, self._root)
_t_records._read()
self.records.append(_t_records)
self._debug['records']['arr'][len(self.records) - 1]['end'] = self._io.pos()
i += 1
self._debug['records']['end'] = self._io.pos()
class Header(KaitaiStruct):
"""
.. seealso::
Source - https://msdn.microsoft.com/en-us/library/bb309024(v=vs.85).aspx
"""
SEQ_FIELDS = ["len_header", "magic", "version_major", "version_minor", "ofs_start", "ofs_end", "cur_rec_idx", "oldest_rec_idx", "len_file_max", "flags", "retention", "len_header_2"]
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
self._debug['len_header']['start'] = self._io.pos()
self.len_header = self._io.read_u4le()
self._debug['len_header']['end'] = self._io.pos()
self._debug['magic']['start'] = self._io.pos()
self.magic = self._io.ensure_fixed_contents(b"\x4C\x66\x4C\x65")
self._debug['magic']['end'] = self._io.pos()
self._debug['version_major']['start'] = self._io.pos()
self.version_major = self._io.read_u4le()
self._debug['version_major']['end'] = self._io.pos()
self._debug['version_minor']['start'] = self._io.pos()
self.version_minor = self._io.read_u4le()
self._debug['version_minor']['end'] = self._io.pos()
self._debug['ofs_start']['start'] = self._io.pos()
self.ofs_start = self._io.read_u4le()
self._debug['ofs_start']['end'] = self._io.pos()
self._debug['ofs_end']['start'] = self._io.pos()
self.ofs_end = self._io.read_u4le()
self._debug['ofs_end']['end'] = self._io.pos()
self._debug['cur_rec_idx']['start'] = self._io.pos()
self.cur_rec_idx = self._io.read_u4le()
self._debug['cur_rec_idx']['end'] = self._io.pos()
self._debug['oldest_rec_idx']['start'] = self._io.pos()
self.oldest_rec_idx = self._io.read_u4le()
self._debug['oldest_rec_idx']['end'] = self._io.pos()
self._debug['len_file_max']['start'] = self._io.pos()
self.len_file_max = self._io.read_u4le()
self._debug['len_file_max']['end'] = self._io.pos()
self._debug['flags']['start'] = self._io.pos()
self.flags = self._root.Header.Flags(self._io, self, self._root)
self.flags._read()
self._debug['flags']['end'] = self._io.pos()
self._debug['retention']['start'] = self._io.pos()
self.retention = self._io.read_u4le()
self._debug['retention']['end'] = self._io.pos()
self._debug['len_header_2']['start'] = self._io.pos()
self.len_header_2 = self._io.read_u4le()
self._debug['len_header_2']['end'] = self._io.pos()
class Flags(KaitaiStruct):
SEQ_FIELDS = ["reserved", "archive", "log_full", "wrap", "dirty"]
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
self._debug['reserved']['start'] = self._io.pos()
self.reserved = self._io.read_bits_int(28)
self._debug['reserved']['end'] = self._io.pos()
self._debug['archive']['start'] = self._io.pos()
self.archive = self._io.read_bits_int(1) != 0
self._debug['archive']['end'] = self._io.pos()
self._debug['log_full']['start'] = self._io.pos()
self.log_full = self._io.read_bits_int(1) != 0
self._debug['log_full']['end'] = self._io.pos()
self._debug['wrap']['start'] = self._io.pos()
self.wrap = self._io.read_bits_int(1) != 0
self._debug['wrap']['end'] = self._io.pos()
self._debug['dirty']['start'] = self._io.pos()
self.dirty = self._io.read_bits_int(1) != 0
self._debug['dirty']['end'] = self._io.pos()
class Record(KaitaiStruct):
"""
.. seealso::
Source - https://msdn.microsoft.com/en-us/library/windows/desktop/aa363646(v=vs.85).aspx
"""
SEQ_FIELDS = ["len_record", "type", "body", "len_record2"]
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
self._debug['len_record']['start'] = self._io.pos()
self.len_record = self._io.read_u4le()
self._debug['len_record']['end'] = self._io.pos()
self._debug['type']['start'] = self._io.pos()
self.type = self._io.read_u4le()
self._debug['type']['end'] = self._io.pos()
self._debug['body']['start'] = self._io.pos()
_on = self.type
if _on == 1699505740:
self._raw_body = self._io.read_bytes((self.len_record - 12))
io = KaitaiStream(BytesIO(self._raw_body))
self.body = self._root.RecordBody(io, self, self._root)
self.body._read()
elif _on == 286331153:
self._raw_body = self._io.read_bytes((self.len_record - 12))
io = KaitaiStream(BytesIO(self._raw_body))
self.body = self._root.CursorRecordBody(io, self, self._root)
self.body._read()
else:
self.body = self._io.read_bytes((self.len_record - 12))
self._debug['body']['end'] = self._io.pos()
self._debug['len_record2']['start'] = self._io.pos()
self.len_record2 = self._io.read_u4le()
self._debug['len_record2']['end'] = self._io.pos()
class RecordBody(KaitaiStruct):
"""
.. seealso::
Source - https://msdn.microsoft.com/en-us/library/windows/desktop/aa363646(v=vs.85).aspx
"""
class EventTypes(Enum):
error = 1
audit_failure = 2
audit_success = 3
info = 4
warning = 5
SEQ_FIELDS = ["idx", "time_generated", "time_written", "event_id", "event_type", "num_strings", "event_category", "reserved", "ofs_strings", "len_user_sid", "ofs_user_sid", "len_data", "ofs_data"]
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
self._debug['idx']['start'] = self._io.pos()
self.idx = self._io.read_u4le()
self._debug['idx']['end'] = self._io.pos()
self._debug['time_generated']['start'] = self._io.pos()
self.time_generated = self._io.read_u4le()
self._debug['time_generated']['end'] = self._io.pos()
self._debug['time_written']['start'] = self._io.pos()
self.time_written = self._io.read_u4le()
self._debug['time_written']['end'] = self._io.pos()
self._debug['event_id']['start'] = self._io.pos()
self.event_id = self._io.read_u4le()
self._debug['event_id']['end'] = self._io.pos()
self._debug['event_type']['start'] = self._io.pos()
self.event_type = KaitaiStream.resolve_enum(self._root.RecordBody.EventTypes, self._io.read_u2le())
self._debug['event_type']['end'] = self._io.pos()
self._debug['num_strings']['start'] = self._io.pos()
self.num_strings = self._io.read_u2le()
self._debug['num_strings']['end'] = self._io.pos()
self._debug['event_category']['start'] = self._io.pos()
self.event_category = self._io.read_u2le()
self._debug['event_category']['end'] = self._io.pos()
self._debug['reserved']['start'] = self._io.pos()
self.reserved = self._io.read_bytes(6)
self._debug['reserved']['end'] = self._io.pos()
self._debug['ofs_strings']['start'] = self._io.pos()
self.ofs_strings = self._io.read_u4le()
self._debug['ofs_strings']['end'] = self._io.pos()
self._debug['len_user_sid']['start'] = self._io.pos()
self.len_user_sid = self._io.read_u4le()
self._debug['len_user_sid']['end'] = self._io.pos()
self._debug['ofs_user_sid']['start'] = self._io.pos()
self.ofs_user_sid = self._io.read_u4le()
self._debug['ofs_user_sid']['end'] = self._io.pos()
self._debug['len_data']['start'] = self._io.pos()
self.len_data = self._io.read_u4le()
self._debug['len_data']['end'] = self._io.pos()
self._debug['ofs_data']['start'] = self._io.pos()
self.ofs_data = self._io.read_u4le()
self._debug['ofs_data']['end'] = self._io.pos()
@property
def user_sid(self):
if hasattr(self, '_m_user_sid'):
return self._m_user_sid if hasattr(self, '_m_user_sid') else None
_pos = self._io.pos()
self._io.seek((self.ofs_user_sid - 8))
self._debug['_m_user_sid']['start'] = self._io.pos()
self._m_user_sid = self._io.read_bytes(self.len_user_sid)
self._debug['_m_user_sid']['end'] = self._io.pos()
self._io.seek(_pos)
return self._m_user_sid if hasattr(self, '_m_user_sid') else None
@property
def data(self):
if hasattr(self, '_m_data'):
return self._m_data if hasattr(self, '_m_data') else None
_pos = self._io.pos()
self._io.seek((self.ofs_data - 8))
self._debug['_m_data']['start'] = self._io.pos()
self._m_data = self._io.read_bytes(self.len_data)
self._debug['_m_data']['end'] = self._io.pos()
self._io.seek(_pos)
return self._m_data if hasattr(self, '_m_data') else None
class CursorRecordBody(KaitaiStruct):
"""
.. seealso::
Source - http://www.forensicswiki.org/wiki/Windows_Event_Log_(EVT)#Cursor_Record
"""
SEQ_FIELDS = ["magic", "ofs_first_record", "ofs_next_record", "idx_next_record", "idx_first_record"]
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
self._debug['magic']['start'] = self._io.pos()
self.magic = self._io.ensure_fixed_contents(b"\x22\x22\x22\x22\x33\x33\x33\x33\x44\x44\x44\x44")
self._debug['magic']['end'] = self._io.pos()
self._debug['ofs_first_record']['start'] = self._io.pos()
self.ofs_first_record = self._io.read_u4le()
self._debug['ofs_first_record']['end'] = self._io.pos()
self._debug['ofs_next_record']['start'] = self._io.pos()
self.ofs_next_record = self._io.read_u4le()
self._debug['ofs_next_record']['end'] = self._io.pos()
self._debug['idx_next_record']['start'] = self._io.pos()
self.idx_next_record = self._io.read_u4le()
self._debug['idx_next_record']['end'] = self._io.pos()
self._debug['idx_first_record']['start'] = self._io.pos()
self.idx_first_record = self._io.read_u4le()
self._debug['idx_first_record']['end'] = self._io.pos()
|
