mirror of https://github.com/mvt-project/mvt.git
147 lines
5.7 KiB
Python
147 lines
5.7 KiB
Python
# Mobile Verification Toolkit (MVT)
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# Copyright (c) 2021 The MVT Project Authors.
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# Use of this software is governed by the MVT License 1.1 that can be found at
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# https://license.mvt.re/1.1/
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import datetime
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import io
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import os
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import plistlib
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import sqlite3
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from mvt.common.module import DatabaseNotFoundError
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from mvt.common.utils import convert_timestamp_to_iso
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from ..base import IOSExtraction
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class Manifest(IOSExtraction):
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"""This module extracts information from a backup Manifest.db file."""
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def __init__(self, file_path=None, base_folder=None, output_folder=None,
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fast_mode=False, log=None, results=[]):
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super().__init__(file_path=file_path, base_folder=base_folder,
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output_folder=output_folder, fast_mode=fast_mode,
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log=log, results=results)
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def _get_key(self, dictionary, key):
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"""Unserialized plist objects can have keys which are str or byte types
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This is a helper to try fetch a key as both a byte or string type.
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:param dictionary:
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:param key:
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"""
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return dictionary.get(key.encode("utf-8"), None) or dictionary.get(key, None)
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@staticmethod
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def _convert_timestamp(timestamp_or_unix_time_int):
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"""Older iOS versions stored the manifest times as unix timestamps.
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:param timestamp_or_unix_time_int:
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"""
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if isinstance(timestamp_or_unix_time_int, datetime.datetime):
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return convert_timestamp_to_iso(timestamp_or_unix_time_int)
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else:
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timestamp = datetime.datetime.utcfromtimestamp(timestamp_or_unix_time_int)
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return convert_timestamp_to_iso(timestamp)
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def serialize(self, record):
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records = []
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if "modified" not in record or "status_changed" not in record:
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return
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for ts in set([record["created"], record["modified"], record["status_changed"]]):
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macb = ""
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macb += "M" if ts == record["modified"] else "-"
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macb += "-"
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macb += "C" if ts == record["status_changed"] else "-"
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macb += "B" if ts == record["created"] else "-"
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records.append({
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"timestamp": ts,
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"module": self.__class__.__name__,
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"event": macb,
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"data": f"{record['relative_path']} - {record['domain']}"
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})
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return records
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def check_indicators(self):
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if not self.indicators:
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return
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for result in self.results:
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if "relative_path" not in result:
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continue
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if not result["relative_path"]:
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continue
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if result["domain"]:
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if os.path.basename(result["relative_path"]) == "com.apple.CrashReporter.plist" and result["domain"] == "RootDomain":
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self.log.warning("Found a potentially suspicious \"com.apple.CrashReporter.plist\" file created in RootDomain")
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self.detected.append(result)
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continue
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if self.indicators.check_file(result["relative_path"]):
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self.log.warning("Found a known malicious file at path: %s", result["relative_path"])
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self.detected.append(result)
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continue
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relPath = result["relative_path"].lower()
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for ioc in self.indicators.ioc_domains:
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if ioc.lower() in relPath:
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self.log.warning("Found mention of domain \"%s\" in a backup file with path: %s",
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ioc, relPath)
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self.detected.append(result)
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def run(self):
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manifest_db_path = os.path.join(self.base_folder, "Manifest.db")
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if not os.path.isfile(manifest_db_path):
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raise DatabaseNotFoundError("unable to find backup's Manifest.db")
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self.log.info("Found Manifest.db database at path: %s", manifest_db_path)
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conn = sqlite3.connect(manifest_db_path)
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cur = conn.cursor()
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cur.execute("SELECT * FROM Files;")
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names = [description[0] for description in cur.description]
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for file_entry in cur:
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file_data = {}
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for index, value in enumerate(file_entry):
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file_data[names[index]] = value
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cleaned_metadata = {
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"file_id": file_data["fileID"],
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"domain": file_data["domain"],
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"relative_path": file_data["relativePath"],
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"flags": file_data["flags"],
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"created": "",
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}
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if file_data["file"]:
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try:
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file_plist = plistlib.load(io.BytesIO(file_data["file"]))
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file_metadata = self._get_key(file_plist, "$objects")[1]
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cleaned_metadata.update({
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"created": self._convert_timestamp(self._get_key(file_metadata, "Birth")),
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"modified": self._convert_timestamp(self._get_key(file_metadata, "LastModified")),
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"status_changed": self._convert_timestamp(self._get_key(file_metadata, "LastStatusChange")),
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"mode": oct(self._get_key(file_metadata, "Mode")),
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"owner": self._get_key(file_metadata, "UserID"),
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"size": self._get_key(file_metadata, "Size"),
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})
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except Exception:
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self.log.exception("Error reading manifest file metadata for file with ID %s and relative path %s",
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file_data["fileID"], file_data["relativePath"])
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pass
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self.results.append(cleaned_metadata)
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cur.close()
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conn.close()
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self.log.info("Extracted a total of %d file metadata items", len(self.results))
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