/
analysis.py
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/
analysis.py
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"""
Perform Analysis on Dynamic Analysis Data
"""
import os
import io
import re
import json
import base64
import tarfile
import shutil
from pathlib import Path
from django.utils.html import escape
from MalwareAnalyzer.views import malware_check
from MobSF.utils import (
python_list,
isBase64,
PrintException
)
def api_analysis(package, location):
"""API Analysis"""
api_analysis_result = {}
logger.info("Dynamic API Analysis")
dat = ""
api_base64 = []
api_fileio = []
api_reflect = []
api_sysprop = []
api_cntvl = []
api_binder = []
api_crypto = []
api_acntmnger = []
api_deviceinfo = []
api_net = []
api_dexloader = []
api_cmd = []
api_sms = []
try:
with open(location, "r", encoding="utf-8") as flip:
dat = flip.readlines()
res_id = "Droidmon-apimonitor-" + package + ":"
for line in dat:
if res_id in line:
# print "LINE: " + line
_, value = line.split(res_id, 1)
# print "PARAM is :" + param
# print "Value is :"+ value
try:
apis = json.loads(value, strict=False)
ret = ''
args = ''
mtd = str(apis["method"])
clss = str(apis["class"])
# print "Called Class: " + CLS
# print "Called Method: " + MTD
if apis.get('return'):
ret = str(apis["return"])
# print "Return Data: " + RET
else:
# print "No Return Data"
ret = "No Return Data"
if apis.get('args'):
args = str(apis["args"])
# print "Passed Arguments" + ARGS
else:
# print "No Arguments Passed"
args = "No Arguments Passed"
# XSS Safe
call_data = "</br>METHOD: " + \
escape(mtd) + "</br>ARGUMENTS: " + escape(args) + \
"</br>RETURN DATA: " + escape(ret)
if re.findall("android.util.Base64", clss):
# Base64 Decode
if "decode" in mtd:
args_list = python_list(args)
if isBase64(args_list[0]):
call_data += '</br><span class="label label-info">' +\
'Decoded String:</span> ' + \
escape(base64.b64decode(args_list[0]))
api_base64.append(call_data)
if re.findall('libcore.io|android.app.SharedPreferencesImpl\$EditorImpl', clss):
api_fileio.append(call_data)
if re.findall('java.lang.reflect', clss):
api_reflect.append(call_data)
if re.findall('android.content.ContentResolver|android.location.Location|android.media.AudioRecord|android.media.MediaRecorder|android.os.SystemProperties', clss):
api_sysprop.append(call_data)
if re.findall('android.app.Activity|android.app.ContextImpl|android.app.ActivityThread', clss):
api_binder.append(call_data)
if re.findall('javax.crypto.spec.SecretKeySpec|javax.crypto.Cipher|javax.crypto.Mac', clss):
api_crypto.append(call_data)
if re.findall('android.accounts.AccountManager|android.app.ApplicationPackageManager|android.app.NotificationManager|android.net.ConnectivityManager|android.content.BroadcastReceiver', clss):
api_acntmnger.append(call_data)
if re.findall('android.telephony.TelephonyManager|android.net.wifi.WifiInfo|android.os.Debug', clss):
api_deviceinfo.append(call_data)
if re.findall('dalvik.system.BaseDexClassLoader|dalvik.system.DexFile|dalvik.system.DexClassLoader|dalvik.system.PathClassLoader', clss):
api_dexloader.append(call_data)
if re.findall('java.lang.Runtime|java.lang.ProcessBuilder|java.io.FileOutputStream|java.io.FileInputStream|android.os.Process', clss):
api_cmd.append(call_data)
if re.findall('android.content.ContentValues', clss):
api_cntvl.append(call_data)
if re.findall('android.telephony.SmsManager', clss):
api_sms.append(call_data)
if re.findall('java.net.URL|org.apache.http.impl.client.AbstractHttpClient', clss):
api_net.append(call_data)
except:
PrintException("[ERROR] Parsing JSON Failed for: " + value)
except:
PrintException("[ERROR] Dynamic API Analysis")
api_analysis_result["api_net"] = list(set(api_net))
api_analysis_result["api_base64"] = list(set(api_base64))
api_analysis_result["api_fileio"] = list(set(api_fileio))
api_analysis_result["api_binder"] = list(set(api_binder))
api_analysis_result["api_crypto"] = list(set(api_crypto))
api_analysis_result["api_deviceinfo"] = list(set(api_deviceinfo))
api_analysis_result["api_cntvl"] = list(set(api_cntvl))
api_analysis_result["api_sms"] = list(set(api_sms))
api_analysis_result["api_sysprop"] = list(set(api_sysprop))
api_analysis_result["api_dexloader"] = list(set(api_dexloader))
api_analysis_result["api_reflect"] = list(set(api_reflect))
api_analysis_result["api_acntmnger"] = list(set(api_acntmnger))
api_analysis_result["api_cmd"] = list(set(api_cmd))
return api_analysis_result
def run_analysis(apk_dir, md5_hash, package):
"""Run Dynamic File Analysis"""
analysis_result = {}
logger.info("Dynamic File Analysis")
capfuzz_home = os.path.join(str(Path.home()), ".capfuzz")
web = os.path.join(capfuzz_home, 'flows', package + ".flows.txt")
logcat = os.path.join(apk_dir, 'logcat.txt')
xlogcat = os.path.join(apk_dir, 'x_logcat.txt')
traffic = ''
web_data = ''
xlg = ''
domains = {}
logcat_data = []
clipboard = []
clip_tag = "I/CLIPDUMP-INFO-LOG"
try:
with io.open(web, mode='r', encoding="utf8", errors="ignore") as flip:
web_data = flip.read()
except:
pass
with io.open(logcat, mode='r', encoding="utf8", errors="ignore") as flip:
logcat_data = flip.readlines()
traffic = ''.join(logcat_data)
with io.open(xlogcat, mode='r', encoding="utf8", errors="ignore") as flip:
xlg = flip.read()
traffic = web_data + traffic + xlg
for log_line in logcat_data:
if log_line.startswith(clip_tag):
clipboard.append(log_line.replace(clip_tag, "Process ID "))
urls = []
# URLs My Custom regex
url_pattern = re.compile(r'((?:https?://|s?ftps?://|file://|javascript:|data:|www\d{0,3}[.])[\w().=/;,#:@?&~*+!$%\'{}-]+)', re.UNICODE)
urllist = re.findall(url_pattern, traffic.lower())
# Domain Extraction and Malware Check
logger.info("Performing Malware Check on extracted Domains")
domains = malware_check(urllist)
for url in urllist:
if url not in urls:
urls.append(url)
# Email Etraction Regex
emails = []
regex = re.compile(r"[\w.-]+@[\w-]+\.[\w.]+")
for email in regex.findall(traffic.lower()):
if (email not in emails) and (not email.startswith('//')):
if email == "yodleebanglore@gmail.com":
pass
else:
emails.append(email)
# Extract Device Data
try:
tar_loc = os.path.join(apk_dir, package + '.tar')
untar_dir = os.path.join(apk_dir, 'DYNAMIC_DeviceData/')
if not os.path.exists(untar_dir):
os.makedirs(untar_dir)
with tarfile.open(tar_loc) as tar:
try:
tar.extractall(untar_dir)
except:
pass
except:
PrintException("[ERROR] TAR EXTRACTION FAILED")
# Do Static Analysis on Data from Device
xmlfiles = ''
sqlite_db = ''
other_files = ''
typ = ''
untar_dir = os.path.join(apk_dir, 'DYNAMIC_DeviceData/')
if not os.path.exists(untar_dir):
os.makedirs(untar_dir)
try:
for dir_name, _, files in os.walk(untar_dir):
for jfile in files:
file_path = os.path.join(untar_dir, dir_name, jfile)
if "+" in file_path:
shutil.move(file_path, file_path.replace("+", "x"))
file_path = file_path.replace("+", "x")
fileparam = file_path.replace(untar_dir, '')
if jfile == 'lib':
pass
else:
if jfile.endswith('.xml'):
typ = 'xml'
xmlfiles += "<tr><td><a href='../View/?file=" + \
escape(fileparam) + "&md5=" + md5_hash + "&type=" + \
typ + "'>" + escape(fileparam) + "</a></td><tr>"
else:
with io.open(file_path, mode='r', encoding="utf8", errors="ignore") as flip:
file_cnt_sig = flip.read(6)
if file_cnt_sig == "SQLite":
typ = 'db'
sqlite_db += "<tr><td><a href='../View/?file=" + \
escape(fileparam) + "&md5=" + md5_hash + "&type=" + \
typ + "'>" + \
escape(fileparam) + "</a></td><tr>"
elif not jfile.endswith('.DS_Store'):
typ = 'others'
other_files += "<tr><td><a href='../View/?file=" + \
escape(fileparam) + "&md5=" + md5_hash + "&type=" + \
typ + "'>" + \
escape(fileparam) + "</a></td><tr>"
except:
PrintException("[ERROR] Dynamic File Analysis")
analysis_result["urls"] = urls
analysis_result["domains"] = domains
analysis_result["emails"] = emails
analysis_result["clipboard"] = clipboard
analysis_result["web_data"] = web_data
analysis_result["xmlfiles"] = xmlfiles
analysis_result["sqlite_db"] = sqlite_db
analysis_result["other_files"] = other_files
return analysis_result
def download(md5_hash, download_dir, apk_dir, package):
"""Generating Downloads"""
logger.info("Generating Downloads")
try:
capfuzz_home = os.path.join(str(Path.home()), ".capfuzz")
logcat = os.path.join(apk_dir, 'logcat.txt')
xlogcat = os.path.join(apk_dir, 'x_logcat.txt')
dumpsys = os.path.join(apk_dir, 'dump.txt')
sshot = os.path.join(apk_dir, 'screenshots-apk/')
web = os.path.join(capfuzz_home, 'flows', package + ".flows.txt")
star = os.path.join(apk_dir, package + '.tar')
dlogcat = os.path.join(download_dir, md5_hash + '-logcat.txt')
dxlogcat = os.path.join(download_dir, md5_hash + '-x_logcat.txt')
ddumpsys = os.path.join(download_dir, md5_hash + '-dump.txt')
dsshot = os.path.join(download_dir, md5_hash + '-screenshots-apk/')
dweb = os.path.join(download_dir, md5_hash + '-WebTraffic.txt')
dstar = os.path.join(download_dir, md5_hash + '-AppData.tar')
# Delete existing data
dellist = [dlogcat, dxlogcat, ddumpsys, dsshot, dweb, dstar]
for item in dellist:
if os.path.isdir(item):
shutil.rmtree(item)
elif os.path.isfile(item):
os.remove(item)
# Copy new data
shutil.copyfile(logcat, dlogcat)
shutil.copyfile(xlogcat, dxlogcat)
shutil.copyfile(dumpsys, ddumpsys)
try:
shutil.copytree(sshot, dsshot)
except:
pass
try:
shutil.copyfile(web, dweb)
except:
pass
try:
shutil.copyfile(star, dstar)
except:
pass
except:
PrintException("[ERROR] Generating Downloads")