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safari_history.py
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safari_history.py
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# Mobile Verification Toolkit (MVT)
# Copyright (c) 2021-2023 The MVT Authors.
# Use of this software is governed by the MVT License 1.1 that can be found at
# https://license.mvt.re/1.1/
import logging
import os
import sqlite3
from typing import Optional, Union
from mvt.common.url import URL
from mvt.common.utils import convert_mactime_to_datetime, convert_mactime_to_iso
from ..base import IOSExtraction
SAFARI_HISTORY_BACKUP_RELPATH = "Library/Safari/History.db"
SAFARI_HISTORY_ROOT_PATHS = [
"private/var/mobile/Library/Safari/History.db",
"private/var/mobile/Containers/Data/Application/*/Library/Safari/History.db",
]
class SafariHistory(IOSExtraction):
"""This module extracts all Safari visits and tries to detect potential
network injection attacks.
"""
def __init__(
self,
file_path: Optional[str] = None,
target_path: Optional[str] = None,
results_path: Optional[str] = None,
module_options: Optional[dict] = None,
log: logging.Logger = logging.getLogger(__name__),
results: Optional[list] = None,
) -> None:
super().__init__(
file_path=file_path,
target_path=target_path,
results_path=results_path,
module_options=module_options,
log=log,
results=results,
)
def serialize(self, record: dict) -> Union[dict, list]:
return {
"timestamp": record["isodate"],
"module": self.__class__.__name__,
"event": "safari_history",
"data": f"Safari visit to {record['url']} (ID: {record['id']}, "
f"Visit ID: {record['visit_id']})",
}
def _find_injections(self):
for result in self.results:
# We presume injections only happen on HTTP visits.
if not result["url"].lower().startswith("http://"):
continue
# If there is no destination, no redirect happened.
if not result["redirect_destination"]:
continue
try:
origin_domain = URL(result["url"]).domain
except Exception:
origin_domain = ""
# We loop again through visits in order to find redirect record.
for redirect in self.results:
if redirect["visit_id"] != result["redirect_destination"]:
continue
try:
redirect_domain = URL(redirect["url"]).domain
except Exception:
redirect_domain = ""
# If the redirect destination is the same domain as the origin,
# it's most likely an HTTPS upgrade.
if origin_domain == redirect_domain:
continue
self.log.info(
'Found HTTP redirect to different domain: "%s" -> "%s"',
origin_domain,
redirect_domain,
)
redirect_time = convert_mactime_to_datetime(redirect["timestamp"])
origin_time = convert_mactime_to_datetime(result["timestamp"])
elapsed_time = redirect_time - origin_time
elapsed_ms = elapsed_time.microseconds / 1000
if elapsed_time.seconds == 0:
self.log.warning(
"Redirect took less than a second! (%d milliseconds)",
elapsed_ms,
)
def check_indicators(self) -> None:
self._find_injections()
if not self.indicators:
return
for result in self.results:
ioc = self.indicators.check_domain(result["url"])
if ioc:
result["matched_indicator"] = ioc
self.detected.append(result)
def _process_history_db(self, history_path):
self._recover_sqlite_db_if_needed(history_path)
conn = sqlite3.connect(history_path)
cur = conn.cursor()
cur.execute(
"""
SELECT
history_items.id,
history_items.url,
history_visits.id,
history_visits.visit_time,
history_visits.redirect_source,
history_visits.redirect_destination
FROM history_items
JOIN history_visits ON history_visits.history_item = history_items.id
ORDER BY history_visits.visit_time;
"""
)
for row in cur:
self.results.append(
{
"id": row[0],
"url": row[1],
"visit_id": row[2],
"timestamp": row[3],
"isodate": convert_mactime_to_iso(row[3]),
"redirect_source": row[4],
"redirect_destination": row[5],
"safari_history_db": os.path.relpath(
history_path, self.target_path
),
}
)
cur.close()
conn.close()
def run(self) -> None:
if self.is_backup:
for history_file in self._get_backup_files_from_manifest(
relative_path=SAFARI_HISTORY_BACKUP_RELPATH
):
history_path = self._get_backup_file_from_id(history_file["file_id"])
if not history_path:
continue
self.log.info("Found Safari history database at path: %s", history_path)
self._process_history_db(history_path)
elif self.is_fs_dump:
for history_path in self._get_fs_files_from_patterns(
SAFARI_HISTORY_ROOT_PATHS
):
self.log.info("Found Safari history database at path: %s", history_path)
self._process_history_db(history_path)
self.log.info("Extracted a total of %d history records", len(self.results))