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Copy pathsysmon.py
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executable file
·251 lines (223 loc) · 8.84 KB
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from Evtx import Evtx
from bs4 import BeautifulSoup
class SysmonEvent:
@staticmethod
def extract_event_data(soup, query):
"""
Attempts to select event data from the eventdata soup component
"""
try:
return soup.eventdata.select_one(query).text
except:
return ""
def __init__(self, soup):
self.soup = soup
self.user_id = soup.security.attrs["userid"]
self.event_id = int(soup.eventid.text)
self.time_created = soup.timecreated.attrs["systemtime"]
try:
self.pid = int(SysmonEvent.extract_event_data(soup, "data[name='ProcessId']"))
except ValueError:
self.pid = None
try:
self.parent_pid = int(SysmonEvent.extract_event_data(soup, "data[name='ParentProcessId']"))
except ValueError:
self.parent_pid = None
self.image = SysmonEvent.extract_event_data(soup, "data[name='Image']")
self.user = SysmonEvent.extract_event_data(soup, "data[name='User']")
class ProcessCreate(SysmonEvent):
"""
Event ID 1
"""
def __init__(self, soup):
super().__init__(soup)
self.hashes = SysmonEvent.extract_event_data(soup, "data[name='Hashes']")
self.command_line = SysmonEvent.extract_event_data(soup, "data[name='CommandLine']")
self.parent_command_line = SysmonEvent.extract_event_data(soup, "data[name='ParentCommandLine']")
self.parent_image = SysmonEvent.extract_event_data(soup, "data[name='ParentImage']")
self.integrity_levels = SysmonEvent.extract_event_data(soup, "data[name='IntegrityLevel']")
class FileCreationTimeChanged(SysmonEvent):
"""
Event ID 2
"""
def __init__(self, soup):
super().__init__(soup)
self.target_filename = SysmonEvent.extract_event_data(soup, "data[name='TargetFilename']")
self.creation_utc_time = SysmonEvent.extract_event_data(soup, "data[name='CreationUtcTime']")
self.previous_creation_utc_time = SysmonEvent.extract_event_data(soup, "data[name='PreviousCreationUtcTime']")
class NetworkConnect(SysmonEvent):
"""
Event ID 3
"""
def __init__(self, soup):
super().__init__(soup)
self.src_ip = SysmonEvent.extract_event_data(soup, "data[name='SourceIp']")
self.dest_ip = SysmonEvent.extract_event_data(soup, "data[name='DestinationIp']")
self.src_port = int(SysmonEvent.extract_event_data(soup, "data[name='SourcePort']"))
self.dest_port = int(SysmonEvent.extract_event_data(soup, "data[name='DestinationPort']"))
self.integrity_levels = SysmonEvent.extract_event_data(soup, "data[name='IntegrityLevel']")
class DriverLoaded(SysmonEvent):
"""
Event ID 6
"""
def __init__(self, soup):
super().__init__(soup)
self.image_loaded = SysmonEvent.extract_event_data(soup, "data[name='ImageLoaded']")
self.signed = SysmonEvent.extract_event_data(soup, "data[name='Signed']")
self.hashes = SysmonEvent.extract_event_data(soup, "data[name='Hashes']")
self.signature = SysmonEvent.extract_event_data(soup, "data[name='Signature']")
self.signature_status = SysmonEvent.extract_event_data(soup, "data[name='SignatureStatus']")
class ImageLoaded(SysmonEvent):
"""
Event ID 7
"""
def __init__(self, soup):
super().__init__(soup)
self.image_loaded = SysmonEvent.extract_event_data(soup, "data[name='ImageLoaded']")
self.signed = SysmonEvent.extract_event_data(soup, "data[name='Signed']")
self.hashes = SysmonEvent.extract_event_data(soup, "data[name='Hashes']")
self.signature = SysmonEvent.extract_event_data(soup, "data[name='Signature']")
self.signature_status = SysmonEvent.extract_event_data(soup, "data[name='SignatureStatus']")
class CreateRemoteThread(SysmonEvent):
"""
Event ID 8
"""
def __init__(self, soup):
super().__init__(soup)
self.source_pid = SysmonEvent.extract_event_data(soup, "data[name='SourceProcessId']")
self.target_pid = SysmonEvent.extract_event_data(soup, "data[name='TargetProcessId']")
self.source_image = SysmonEvent.extract_event_data(soup, "data[name='SourceImage']")
self.target_image = SysmonEvent.extract_event_data(soup, "data[name='TargetImage']")
self.new_thread_id = SysmonEvent.extract_event_data(soup, "data[name='NewThreadId']")
class RawAccessRead(SysmonEvent):
"""
Event ID 9
"""
def __init__(self, soup):
super().__init__(soup)
self.device = SysmonEvent.extract_event_data(soup, "data[name='Device']")
class ProcessAccess(SysmonEvent):
"""
Event ID 8
"""
def __init__(self, soup):
super().__init__(soup)
self.source_pid = SysmonEvent.extract_event_data(soup, "data[name='SourceProcessId']")
self.target_pid = SysmonEvent.extract_event_data(soup, "data[name='TargetProcessId']")
self.source_image = SysmonEvent.extract_event_data(soup, "data[name='SourceImage']")
self.target_image = SysmonEvent.extract_event_data(soup, "data[name='TargetImage']")
self.granted_access = SysmonEvent.extract_event_data(soup, "data[name='GrantedAccess']")
class FileCreate(SysmonEvent):
"""
Event ID 11
"""
def __init__(self, soup):
super().__init__(soup)
self.target_filename = SysmonEvent.extract_event_data(soup, "data[name='TargetFilename']")
class RegistryCreateDelete(SysmonEvent):
"""
Event ID 12
"""
def __init__(self, soup):
super().__init__(soup)
self.target_object = SysmonEvent.extract_event_data(soup, "data[name='TargetObject']")
class RegistryValueSet(SysmonEvent):
"""
Event ID 13
"""
def __init__(self, soup):
super().__init__(soup)
self.target_object = SysmonEvent.extract_event_data(soup, "data[name='TargetObject']")
self.details = SysmonEvent.extract_event_data(soup, "data[name='Details']")
class RegistryKeyValueRename(SysmonEvent):
"""
Event ID 14
"""
def __init__(self, soup):
super().__init__(soup)
self.target_object = SysmonEvent.extract_event_data(soup, "data[name='TargetObject']")
self.new_name = SysmonEvent.extract_event_data(soup, "data[name='NewName']")
class PipeEvent(SysmonEvent):
"""
Event ID 17, 18
"""
def __init__(self, soup):
super().__init__(soup)
self.pipe_name = SysmonEvent.extract_event_data(soup, "data[name='PipeName']")
class WmiEventFilter(SysmonEvent):
"""
Event ID 19
"""
def __init__(self, soup):
super().__init__(soup)
self.event_namespace = SysmonEvent.extract_event_data(soup, "data[name='EventNamespace']")
self.filter_name = SysmonEvent.extract_event_data(soup, "data[name='Name']")
self.query = SysmonEvent.extract_event_data(soup, "data[name='Query']")
class DNSEvent(SysmonEvent):
"""
Event ID 22
"""
def __init__(self, soup):
super().__init__(soup)
self.query_name = SysmonEvent.extract_event_data(soup, "data[name='QueryName']")
self.query_results = SysmonEvent.extract_event_data(soup, "data[name='QueryResults']")
class ProcessTampering(SysmonEvent):
"""
Event ID 25
"""
def __init__(self, soup):
super().__init__(soup)
self.type = SysmonEvent.extract_event_data(soup, "data[name='Type']")
EVENT_TYPES = {
"1": ProcessCreate,
"2": FileCreationTimeChanged,
"3": NetworkConnect,
"6": DriverLoaded,
"7": ImageLoaded,
"8": CreateRemoteThread,
"9": RawAccessRead,
"10": ProcessAccess,
"11": FileCreate,
"12": RegistryCreateDelete,
"13": RegistryValueSet,
"14": RegistryKeyValueRename,
"17": PipeEvent,
"18": PipeEvent,
"19": WmiEventFilter,
"22": DNSEvent,
"25": ProcessTampering
}
def load_event_xml(file_path):
"""
Loads raw XML from Evtx file
"""
with Evtx.Evtx(file_path) as f:
records_xml = [f.xml() for f in f.records()]
return records_xml
def build_event_xml(raw_xml):
soup = BeautifulSoup(raw_xml, "lxml")
id = soup.eventid.text
if id in EVENT_TYPES:
constructor = EVENT_TYPES[id]
return constructor(soup)
return SysmonEvent(soup)
def build_event_soup(soup_evt):
id = soup_evt.eventid.text
if id in EVENT_TYPES:
constructor = EVENT_TYPES[id]
return constructor(soup_evt)
return SysmonEvent(soup_evt)
def load_evtx(file_path):
"""
Generate and return a list of SysmonEvents from EVTX
"""
records_xml = load_event_xml(file_path)
return [build_event_xml(r) for r in records_xml]
def load_xml(file_path):
"""
Generate and return a list of SysmonEvents from XML format
"""
with open(file_path) as f:
soup = BeautifulSoup(f, "lxml")
events = [s for s in soup.find_all("event")]
return [build_event_soup(e) for e in events]