/
loki-upgrader.py
executable file
·298 lines (257 loc) · 11.9 KB
/
loki-upgrader.py
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#!/usr/bin/env python
# -*- coding: iso-8859-1 -*-
# -*- coding: utf-8 -*-
#
# LOKI Upgrader
try:
from urllib2 import urlopen
except ImportError:
from urllib.request import urlopen #For python 3.5
import json
import zipfile
import shutil
import io
import os
import argparse
import traceback
from sys import platform as _platform
try:
from urlparse import urlparse
except ImportError:
from urllib.parse import urlparse
from os.path import exists
# Win32 Imports
if _platform == "win32":
try:
import win32api
except Exception:
platform = "linux" # crazy guess
from lib.lokilogger import *
# Platform
platform = ""
if _platform == "linux" or _platform == "linux2":
platform = "linux"
elif _platform == "darwin":
platform = "macos"
elif _platform == "win32":
platform = "windows"
def needs_update(sig_url):
try:
o=urlparse(sig_url)
path=o.path.split('/')
branch=path[4].split('.')[0]
path.pop(len(path)-1)
path.pop(len(path)-1)
url = o.scheme+'://api.'+o.netloc+'/repos'+'/'.join(path)+'/commits/'+branch
response_info = urlopen(url)
j = json.load(response_info)
sha=j['sha']
cache='_'.join(path)+'.cache'
changed=False
if exists(cache):
with open(cache, "r") as file:
old_sha = file.read().rstrip()
if sha != old_sha:
changed=True
else:
with open(cache, "w") as file:
file.write(sha)
changed=True
return changed
except Exception:
return True
class LOKIUpdater(object):
# Incompatible signatures
INCOMPATIBLE_RULES = []
UPDATE_URL_SIGS = [
"https://github.com/Neo23x0/signature-base/archive/master.zip",
"https://github.com/reversinglabs/reversinglabs-yara-rules/archive/develop.zip"
]
UPDATE_URL_LOKI = "https://api.github.com/repos/Neo23x0/Loki/releases/latest"
def __init__(self, debug, logger, application_path):
self.debug = debug
self.logger = logger
self.application_path = application_path
def update_signatures(self, clean=False):
try:
for sig_url in self.UPDATE_URL_SIGS:
if needs_update(sig_url):
# Downloading current repository
try:
self.logger.log("INFO", "Upgrader", "Downloading %s ..." % sig_url)
response = urlopen(sig_url)
except Exception:
if self.debug:
traceback.print_exc()
self.logger.log("ERROR", "Upgrader", "Error downloading the signature database - "
"check your Internet connection")
sys.exit(1)
# Preparations
try:
sigDir = os.path.join(self.application_path, os.path.abspath('signature-base/'))
if clean:
self.logger.log("INFO", "Upgrader", "Cleaning directory '%s'" % sigDir)
shutil.rmtree(sigDir)
for outDir in ['', 'iocs', 'yara', 'misc']:
fullOutDir = os.path.join(sigDir, outDir)
if not os.path.exists(fullOutDir):
os.makedirs(fullOutDir)
except Exception:
if self.debug:
traceback.print_exc()
self.logger.log("ERROR", "Upgrader", "Error while creating the signature-base directories")
sys.exit(1)
# Read ZIP file
try:
zipUpdate = zipfile.ZipFile(io.BytesIO(response.read()))
for zipFilePath in zipUpdate.namelist():
sigName = os.path.basename(zipFilePath)
if zipFilePath.endswith("/"):
continue
# Skip incompatible rules
skip = False
for incompatible_rule in self.INCOMPATIBLE_RULES:
if sigName.endswith(incompatible_rule):
self.logger.log("NOTICE", "Upgrader", "Skipping incompatible rule %s" % sigName)
skip = True
if skip:
continue
# Extract the rules
self.logger.log("DEBUG", "Upgrader", "Extracting %s ..." % zipFilePath)
if "/iocs/" in zipFilePath and zipFilePath.endswith(".txt"):
targetFile = os.path.join(sigDir, "iocs", sigName)
elif "/yara/" in zipFilePath and zipFilePath.endswith(".yar"):
targetFile = os.path.join(sigDir, "yara", sigName)
elif "/misc/" in zipFilePath and zipFilePath.endswith(".txt"):
targetFile = os.path.join(sigDir, "misc", sigName)
elif zipFilePath.endswith(".yara"):
targetFile = os.path.join(sigDir, "yara", sigName)
else:
continue
# New file
if not os.path.exists(targetFile):
self.logger.log("INFO", "Upgrader", "New signature file: %s" % sigName)
# Extract file
source = zipUpdate.open(zipFilePath)
target = open(targetFile, "wb")
with source, target:
shutil.copyfileobj(source, target)
target.close()
source.close()
except Exception:
if self.debug:
traceback.print_exc()
self.logger.log("ERROR", "Upgrader", "Error while extracting the signature files from the download "
"package")
sys.exit(1)
else:
self.logger.log("INFO", "Upgrader", "%s is up to date." % sig_url)
except Exception:
if self.debug:
traceback.print_exc()
return False
return True
def update_loki(self):
try:
# Downloading the info for latest release
try:
self.logger.log("INFO", "Upgrader", "Checking location of latest release %s ..." % self.UPDATE_URL_LOKI)
response_info = urlopen(self.UPDATE_URL_LOKI)
data = json.load(response_info)
# Get download URL
zip_url = data['assets'][0]['browser_download_url']
self.logger.log("INFO", "Upgrader", "Downloading latest release %s ..." % zip_url)
response_zip = urlopen(zip_url)
except Exception:
if self.debug:
traceback.print_exc()
self.logger.log("ERROR", "Upgrader", "Error downloading the loki update - check your Internet connection")
sys.exit(1)
# Read ZIP file
try:
zipUpdate = zipfile.ZipFile(io.BytesIO(response_zip.read()))
for zipFilePath in zipUpdate.namelist():
if zipFilePath.endswith("/") or "/config/" in zipFilePath or "/loki-upgrader.exe" in zipFilePath:
continue
source = zipUpdate.open(zipFilePath)
targetFile = "/".join(zipFilePath.split("/")[1:])
self.logger.log("INFO", "Upgrader", "Extracting %s ..." %targetFile)
try:
# Create file if not present
if not os.path.exists(os.path.dirname(targetFile)):
if os.path.dirname(targetFile) != '':
os.makedirs(os.path.dirname(targetFile))
except Exception:
if self.debug:
self.logger.log("DEBUG", "Upgrader", "Cannot create dir name '%s'" % os.path.dirname(targetFile))
traceback.print_exc()
try:
# Create target file
target = open(targetFile, "wb")
with source, target:
shutil.copyfileobj(source, target)
if self.debug:
self.logger.log("DEBUG", "Upgrader", "Successfully extracted '%s'" % targetFile)
target.close()
except Exception:
self.logger.log("ERROR", "Upgrader", "Cannot extract '%s'" % targetFile)
if self.debug:
traceback.print_exc()
except Exception:
if self.debug:
traceback.print_exc()
self.logger.log("ERROR", "Upgrader",
"Error while extracting the signature files from the download package")
sys.exit(1)
except Exception:
if self.debug:
traceback.print_exc()
return False
return True
def get_application_path():
try:
if getattr(sys, 'frozen', False):
application_path = os.path.dirname(os.path.realpath(sys.executable))
else:
application_path = os.path.dirname(os.path.realpath(__file__))
if "~" in application_path and platform == "windows":
# print "Trying to translate"
# print application_path
application_path = win32api.GetLongPathName(application_path)
#if args.debug:
# logger.log("DEBUG", "Init", "Application Path: %s" % application_path)
return application_path
except Exception:
print("Error while evaluation of application path")
traceback.print_exc()
if __name__ == '__main__':
# Parse Arguments
parser = argparse.ArgumentParser(description='Loki - Upgrader')
parser.add_argument('-l', help='Log file', metavar='log-file', default='loki-upgrade.log')
parser.add_argument('--sigsonly', action='store_true', help='Update the signatures only', default=False)
parser.add_argument('--progonly', action='store_true', help='Update the program files only', default=False)
parser.add_argument('--nolog', action='store_true', help='Don\'t write a local log file', default=False)
parser.add_argument('--debug', action='store_true', default=False, help='Debug output')
parser.add_argument('--clean', action='store_true', default=False, help='Clean up the signature directory and get '
'a fresh set')
parser.add_argument('--detached', action='store_true', default=False, help=argparse.SUPPRESS)
args = parser.parse_args()
# Computername
if platform == "windows":
t_hostname = os.environ['COMPUTERNAME']
else:
t_hostname = os.uname()[1]
# Logger
logger = LokiLogger(args.nolog, args.l, t_hostname, '', '', False, False, False, args.debug, platform=platform, caller='upgrader')
# Update LOKI
updater = LOKIUpdater(args.debug, logger, get_application_path())
if not args.sigsonly:
logger.log("INFO", "Upgrader", "Updating LOKI ...")
updater.update_loki()
if not args.progonly:
logger.log("INFO", "Upgrader", "Updating Signatures ...")
updater.update_signatures(args.clean)
logger.log("INFO", "Upgrader", "Update complete")
if args.detached:
logger.log("INFO", "Upgrader", "Press any key to return ...")
sys.exit(0)