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Perform forensic acquisition and analysis of cloud storage services including Google Drive, OneDrive, Dropbox, and Box by collecting both API-based remote data and local sync client artifacts from endpoint devices.
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基于 SOC 职业分类
| name | performing-cloud-storage-forensic-acquisition |
| description | Perform forensic acquisition and analysis of cloud storage services including Google Drive, OneDrive, Dropbox, and Box by collecting both API-based remote data and local sync client artifacts from endpoint devices. |
| domain | cybersecurity |
| subdomain | digital-forensics |
| tags | ["cloud-forensics","google-drive","onedrive","dropbox","box","cloud-acquisition","api-forensics","sync-client","endpoint-artifacts","magnet-axiom"] |
| version | 1.0 |
| author | mahipal |
| license | Apache-2.0 |
Cloud storage forensic acquisition involves collecting digital evidence from services like Google Drive, OneDrive, Dropbox, and Box through both API-based remote acquisition and local endpoint artifact analysis. Modern investigations must address the challenge that cloud-synced files may exist in multiple states: locally synchronized, cloud-only (on-demand), cached, and deleted. Endpoint devices that have synchronized with cloud storage contain a wealth of metadata about locally synced files, files present only in the cloud, and even deleted items recoverable from cache folders. API-based acquisition using service-specific APIs provides direct access to remote data with valid credentials and proper legal authorization.
from google.oauth2.credentials import Credentials
from googleapiclient.discovery import build
from googleapiclient.http import MediaIoBaseDownload
import io
import os
import json
from datetime import datetime
class GoogleDriveForensicAcquisition:
"""Forensically acquire files and metadata from Google Drive via API."""
def __init__(self, credentials_path: str, output_dir: str):
self.creds = Credentials.from_authorized_user_file(credentials_path)
self.service = build("drive", "v3", credentials=.creds)
.output_dir = output_dir
os.makedirs(output_dir, exist_ok=)
.acquisition_log = []
() -> :
files = []
page_token =
query = include_trashed
:
results = .service.files().(
q=query,
pageSize=,
fields=
,
pageToken=page_token
).execute()
files.extend(results.get(, []))
page_token = results.get()
page_token:
files
() -> :
output_path = os.path.join(.output_dir, file_name)
mime_type.startswith():
export_formats = {
: ,
: ,
: ,
}
export_mime = export_formats.get(mime_type, )
request = .service.files().export_media(fileId=file_id, mimeType=export_mime)
:
request = .service.files().get_media(fileId=file_id)
io.FileIO(output_path, ) fh:
downloader = MediaIoBaseDownload(fh, request)
done =
done:
_, done = downloader.next_chunk()
.acquisition_log.append({
: datetime.utcnow().isoformat(),
: file_id,
: file_name,
: output_path,
:
})
output_path
() -> :
revisions = .service.revisions().(
fileId=file_id,
fields=
).execute()
revisions.get(, [])
() -> :
report_path = os.path.join(.output_dir, )
(report_path, ) f:
json.dump({
: .acquisition_log[][] .acquisition_log ,
: datetime.utcnow().isoformat(),
: (.acquisition_log),
: .acquisition_log
}, f, indent=)
report_path
import msal
import requests
import os
import json
from datetime import datetime
class OneDriveForensicAcquisition:
"""Forensically acquire files and metadata from OneDrive via Microsoft Graph API."""
def __init__(self, client_id: str, tenant_id: str, client_secret: str, output_dir: str):
self.output_dir = output_dir
os.makedirs(output_dir, exist_ok=True)
authority = f"https://login.microsoftonline.com/{tenant_id}"
self.app = msal.ConfidentialClientApplication(
client_id, authority=authority, client_credential=client_secret
)
token_result = self.app.acquire_token_for_client(
scopes=["https://graph.microsoft.com/.default"]
)
self.access_token = token_result.get("access_token")
self.headers = {"Authorization": f"Bearer {self.access_token}"}
self.base_url = "https://graph.microsoft.com/v1.0"
def list_user_files(self, user_id: str) -> list:
"""List all files in user's OneDrive."""
url = f"{self.base_url}/users/{user_id}/drive/root/children"
files = []
while url:
response = requests.get(url, headers=self.headers)
data = response.json()
files.extend(data.get("value", []))
url = data.get("@odata.nextLink")
return files
def download_file(self, user_id: str, item_id: str, filename: str) -> str:
"""Download a file from OneDrive."""
url = f"{self.base_url}/users/{user_id}/drive/items/{item_id}/content"
response = requests.get(url, headers=self.headers, stream=True)
output_path = os.path.join(self.output_dir, filename)
with open(output_path, "wb") as f:
for chunk in response.iter_content(chunk_size=8192):
f.write(chunk)
return output_path
def get_deleted_items(self, user_id: str) -> list:
"""Retrieve items from OneDrive recycle bin."""
url = f"{self.base_url}/users/{user_id}/drive/special/recyclebin/children"
response = requests.get(url, headers=self.headers)
return response.json().get("value", [])
# Collect all cloud storage artifacts using KAPE
kape.exe --tsource C: --tdest C:\Output\CloudArtifacts --target GoogleDrive,OneDrive,Dropbox,Box
# OneDrive artifacts
# %USERPROFILE%\AppData\Local\Microsoft\OneDrive\logs\
# %USERPROFILE%\AppData\Local\Microsoft\OneDrive\settings\
# %USERPROFILE%\OneDrive\
# Google Drive artifacts
# %USERPROFILE%\AppData\Local\Google\DriveFS\
# Contains metadata SQLite databases and cached files
# Dropbox artifacts
# %USERPROFILE%\AppData\Local\Dropbox\
# %USERPROFILE%\Dropbox\.dropbox.cache\
# Contains filecache.dbx (encrypted SQLite), host.dbx, config.dbx
import sqlite3
import os
def analyze_onedrive_sync_engine(db_path: str) -> list:
"""Analyze OneDrive SyncEngineDatabase for file metadata."""
conn = sqlite3.connect(db_path)
cursor = conn.cursor()
# Query for all tracked files including cloud-only items
cursor.execute("""
SELECT fileName, fileSize, lastChange,
resourceID, parentResourceID, eTag
FROM od_ClientFile_Records
ORDER BY lastChange DESC
""")
files = []
for row in cursor.fetchall():
files.append({
"filename": row[0],
"size": row[1],
"last_change": row[2],
"resource_id": row[3],
"parent_id": row[4],
"etag": row[5]
})
conn.close()
return files
| Service | Local Database | Cache Location | Log Files |
|---|---|---|---|
| OneDrive | SyncEngineDatabase.db | %LOCALAPPDATA%\Microsoft\OneDrive\cache\ | %LOCALAPPDATA%\Microsoft\OneDrive\logs\ |
| Google Drive | metadata_sqlite_db | %LOCALAPPDATA%\Google\DriveFS{account}\content_cache\ | %LOCALAPPDATA%\Google\DriveFS\Logs\ |
| Dropbox | filecache.dbx (encrypted) | %APPDATA%\Dropbox.dropbox.cache\ | %APPDATA%\Dropbox\logs\ |
| Box | sync_db | %LOCALAPPDATA%\Box\Box\cache\ | %LOCALAPPDATA%\Box\Box\logs\ |