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138 lines
4.7 KiB
Python
138 lines
4.7 KiB
Python
# Mobile Verification Toolkit (MVT)
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# Copyright (c) 2021-2022 Claudio Guarnieri.
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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 logging
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import os
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import stat
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from typing import Optional, Union
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from mvt.common.utils import convert_unix_to_iso
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from .base import AndroidExtraction
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ANDROID_TMP_FOLDERS = [
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"/tmp/",
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"/data/local/tmp/",
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]
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ANDROID_MEDIA_FOLDERS = [
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"/data/media/0",
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"/sdcard/",
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]
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class Files(AndroidExtraction):
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"""This module extracts the list of files on the device."""
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def __init__(
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self,
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file_path: Optional[str] = "",
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target_path: Optional[str] = "",
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results_path: Optional[str] = "",
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fast_mode: Optional[bool] = False,
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log: logging.Logger = logging.getLogger(__name__),
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results: Optional[list] = []
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) -> None:
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super().__init__(file_path=file_path, target_path=target_path,
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results_path=results_path, fast_mode=fast_mode,
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log=log, results=results)
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self.full_find = False
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def serialize(self, record: dict) -> Union[dict, list]:
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if "modified_time" in record:
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return {
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"timestamp": record["modified_time"],
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"module": self.__class__.__name__,
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"event": "file_modified",
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"data": record["path"],
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}
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return None
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def check_indicators(self) -> None:
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for result in self.results:
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if result.get("is_suid"):
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self.log.warning("Found an SUID file in a non-standard directory \"%s\".",
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result["path"])
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if self.indicators and self.indicators.check_file_path(result["path"]):
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self.log.warning("Found a known suspicous file at path: \"%s\"",
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result["path"])
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self.detected.append(result)
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def backup_file(self, file_path: str) -> None:
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local_file_name = file_path.replace("/", "_").replace(" ", "-")
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local_files_folder = os.path.join(self.results_path, "files")
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if not os.path.exists(local_files_folder):
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os.mkdir(local_files_folder)
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local_file_path = os.path.join(local_files_folder, local_file_name)
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try:
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self._adb_download(remote_path=file_path,
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local_path=local_file_path)
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except Exception:
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pass
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else:
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self.log.info("Downloaded file %s to local copy at %s",
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file_path, local_file_path)
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def find_files(self, folder: str) -> None:
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if self.full_find:
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cmd = f"find '{folder}' -type f -printf '%T@ %m %s %u %g %p\n' 2> /dev/null"
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output = self._adb_command(cmd)
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for file_line in output.splitlines():
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[unix_timestamp, mode, size,
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owner, group, full_path] = file_line.rstrip().split(" ", 5)
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mod_time = convert_unix_to_iso(unix_timestamp)
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self.results.append({
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"path": full_path,
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"modified_time": mod_time,
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"mode": mode,
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"is_suid": (int(mode, 8) & stat.S_ISUID) == 2048,
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"is_sgid": (int(mode, 8) & stat.S_ISGID) == 1024,
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"size": size,
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"owner": owner,
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"group": group,
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})
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else:
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output = self._adb_command(f"find '{folder}' -type f 2> /dev/null")
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for file_line in output.splitlines():
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self.results.append({"path": file_line.rstrip()})
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def run(self) -> None:
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self._adb_connect()
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cmd = "find '/' -maxdepth 1 -printf '%T@ %m %s %u %g %p\n' 2> /dev/null"
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output = self._adb_command(cmd)
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if output or output.strip().splitlines():
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self.full_find = True
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for tmp_folder in ANDROID_TMP_FOLDERS:
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self.find_files(tmp_folder)
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for entry in self.results:
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self.log.info("Found file in tmp folder at path %s",
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entry.get("path"))
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if self.results_path:
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self.backup_file(entry.get("path"))
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for media_folder in ANDROID_MEDIA_FOLDERS:
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self.find_files(media_folder)
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self.log.info("Found %s files in primary Android tmp and media folders",
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len(self.results))
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if self.fast_mode:
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self.log.info("Flag --fast was enabled: skipping full file listing")
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else:
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self.log.info("Processing full file listing. This may take a while...")
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self.find_files("/")
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self.log.info("Found %s total files", len(self.results))
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self._adb_disconnect()
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