Extract from system evtx logon

evtx_extract_sys.py

import mmap
import contextlib

import argparse
from bs4 import BeautifulSoup, element

from Evtx.Evtx import FileHeader
from Evtx.Views import evtx_file_xml_view

evtxs = {
        4624: 'An account was successfully logged on.',
        4625: 'An account failed to log on.',
        4648: 'A logon was attempted using explicit credentials',
        4778: 'A session was reconnected to a Window Station',
        4647: 'User initiated logoff',
        4634: 'An account was logged off',
        4779: 'A session was disconnected from a Window Station'
}

def main():
    parser = argparse.ArgumentParser(
        description="Dump a binary EVTX file into XML.")
    parser.add_argument("evtx", type=str,
                        help="Path to the Windows System EVTX event log file")
    args = parser.parse_args()

    with open(args.evtx, 'r') as f:
        with contextlib.closing(mmap.mmap(f.fileno(), 0,
                                          access=mmap.ACCESS_READ)) as buf:
            fh = FileHeader(buf, 0x0)
            for xml, record in evtx_file_xml_view(fh):
                soup = BeautifulSoup(xml)
                eventid = int(soup.event.system.eventid.string)
                date = soup.event.system.timecreated['systemtime']
                processid = soup.event.system.execution['processid']
                threadid = soup.event.system.execution['threadid']
                computer = soup.event.system.computer.string
                userid = soup.event.system.security['userid']

                if eventid in evtxs:
                    out = "%s (%s); %s; %s; %s; %s; %s" % (eventid, evtxs[eventid], date, processid, threadid, computer, userid)
                else:
                    out = "%s; %s; %s; %s; %s; %s" % (eventid, date, processid, threadid, computer, userid)
                #print soup
                info = {}
                try:
                    for child in soup.userdata.children:
                        if type(child) is element.Tag:
                            info[child.name] = ' '.join(child.text.split())
                            out += "; %s: %s " % (child.name, ' '.join(child.text.split()))
                except:
                    pass

                try:
                    for child in soup.eventdata.children:
                        if type(child) is element.Tag:
                            info[child['name']] = ' '.join(child.text.split())
                            out += "; %s: %s " % (child['name'], ' '.join(child.text.split()))
                except:
                    pass
                if eventid in [4624, 4625, 4648, 4778, 4647, 4634, 4779]:
                    if 'LogonType' in info and info['LogonType'] not in ['5', '3', '4']:
                        print out

if __name__ == "__main__":
    main()