# BYOD Ransomware Group Allegedly Claims Toyota Data Breach (Unverified)

> The BYOD ransomware/data-extortion group listed Toyota on its leak site on 2026-11-10, claiming access involving 'Kiosk Devices' and personal data (names, emails, physical addresses, phone numbers, dates of birth). The claim is unverified: no technical evidence, record volume, or Toyota response has been reported.

- **Published:** 2026-11-10T18:23:07Z
- **Last reviewed:** 2026-11-10T18:23:07Z
- **Canonical:** https://intel.threadlinqs.com/threat/TL-2026-5669
- **Card image:** https://intel.threadlinqs.com/og/threat/TL-2026-5669.png
- **ID:** TL-2026-5669
- **Severity:** MEDIUM
- **Category:** DATA_BREACH
- **Status:** TRACKING
- **Actor:** BYOD
- **Detections:** 9 (1 shown free below) · **IOCs:** 11 (1 shown free below)

## Description

On 2026-11-10 Cyber Security News reported that the BYOD ransomware group had added Toyota to its leak site, with a listing updated the same day. The listing mentions 'Kiosk Devices' and alleges exposure of full names, email addresses, physical addresses, phone numbers and dates of birth. The article states BYOD claims to have found remaining access paths, but no entry point, sample data, record count, ransom amount, deadline or encryption evidence is shown, and Toyota has not publicly responded. The article's reference to Toyota's May 2023 cloud-configuration notice and to the August 2024 240 GB ZeroSevenGroup leak concerns different incidents and does not corroborate this claim.

BYOD is an emerging extortion group. Breachsense (data as of 2026-11-10) tracks one Tor leak site, 14 named victims (first recorded 2026-10-05, most recent 2026-11-10), including T-Mobile US, IHG, Vanderbilt University, Michigan State University, University of New Mexico, Texas Health and Human Services Commission, Gate, Royal Selangor, Decorolala, Standpointe Solutions, eTeam, Franklin Empire and Trump Mobile. Toyota is a later addition not yet reflected in that list. WatchGuard classifies BYOD as a 'Data Broker' with direct and double extortion, first seen September 2026, communicating via email, Session Messenger and an X account, and notes its leak site looks identical to the UmBra group's and that it began operating around the same time (medium confidence). Aggregator sources conflict on counts, sectors and countries, so victim claims should be treated as attacker assertions.

The only technical detail published about BYOD's methods is an aggregator summary of its Franklin Empire claim (over 700 GB), in which the group alleges it dumped AWS keys for cloud buckets, Moonshot AI API keys, SMTP credentials, customer PII, invoices and inventory data. No malware, vulnerabilities (CVEs), initial-access method or encryption behavior has been documented for BYOD. Defenders should treat this as a monitoring item: validate the claim through Toyota channels, check for exposure of kiosk-related systems and credentials, and watch for data publication. No clearnet IOCs exist; the Tor leak-site address is the only network indicator.

## MITRE ATT&CK

- T1657 Financial Theft
- T1567 Exfiltration Over Web Service
- T1530 Data from Cloud Storage
- T1552 Unsecured Credentials
- T1583 Acquire Infrastructure

## Free detection (Splunk SPL, Microsoft KQL, Sigma)

**BYOD Extortion Group Leak Site / X Account / Onion Access via Web Proxy** (`TL-2026-5669-SPL-001`)

Detects proxy-logged requests to the BYOD ransomware Tor leak site (byodxn5s7s...3wdrgad.onion, community-corroborated by RansoMonitor), the group's X account (x.com/byodrw), or any .onion destination. TL-2026-5669 (Toyota claim, unverified) has no malware or CVE, so adversary-owned infrastructure contact from corporate hosts is one of the few observable signals. Useful for victim-claim validation and for spotting staff or compromised hosts visiting the leak site.

- **Languages:** Splunk SPL, Microsoft KQL, Sigma
- **ATT&CK:** T1583, T1090.003, T1657
- **Data sources:** proxy:squid:access, web_proxy, defender_for_endpoint:DeviceNetworkEvents
- **Severity:** high
- **Confidence:** high

### Splunk SPL

```spl
index=proxy sourcetype="squid:access" earliest=-24h (url="*byodxn5s7sua6oyyjj74rycgn6afncfckprt5ezskt3cni6lg3wdrgad.onion*" OR url="*.onion*" OR url="*x.com/byodrw*" OR url="*twitter.com/byodrw*") | eval ioc=case(like(url,"%byodxn5s7sua6oyyjj74rycgn6afncfckprt5ezskt3cni6lg3wdrgad%"),"byod_leak_site",like(url,"%/byodrw%"),"byod_x_account",true(),"generic_onion") | stats count min(_time) as first_seen max(_time) as last_seen values(url) as urls by src ioc | convert ctime(first_seen) ctime(last_seen) | sort - count
```

### Microsoft KQL

```kql
DeviceNetworkEvents | where Timestamp > ago(24h) | where RemoteUrl has_any ('byodxn5s7sua6oyyjj74rycgn6afncfckprt5ezskt3cni6lg3wdrgad.onion', 'x.com/byodrw', 'twitter.com/byodrw') or RemoteUrl endswith '.onion' | extend IndicatorType = case(RemoteUrl has 'byodxn5s7sua6oyyjj74rycgn6afncfckprt5ezskt3cni6lg3wdrgad', 'byod_leak_site', RemoteUrl has '/byodrw', 'byod_x_account', 'generic_onion') | project Timestamp, DeviceName, InitiatingProcessAccountName, InitiatingProcessFileName, InitiatingProcessCommandLine, RemoteUrl, RemoteIP, IndicatorType
```

### Sigma

```yaml
title: Access to BYOD Ransomware Leak Site or Onion Services via Proxy
id: 5b1e7c02-3a4d-4f6e-9c1a-0d2e8f7a6b11
status: experimental
description: Detects proxy requests to the BYOD extortion group's Tor leak site, its X account, or any .onion host (TL-2026-5669).
references:
    - https://www.breachsense.com/ransomware-groups/byod/
    - https://www.watchguard.com/wgrd-security-hub/ransomware-tracker/byod
author: Threadlinqs Team
date: 2026/11/10
tags:
    - attack.resource-development
    - attack.t1583
    - attack.command-and-control
    - attack.t1090.003
logsource:
    category: proxy
detection:
    selection_byod:
        c-uri|contains:
            - 'byodxn5s7sua6oyyjj74rycgn6afncfckprt5ezskt3cni6lg3wdrgad'
            - '/byodrw'
    selection_onion:
        cs-host|endswith: '.onion'
    condition: 1 of selection_*
falsepositives:
    - Security researchers or threat-intel staff validating the Toyota/BYOD claim
    - Authorized dark-web monitoring tooling
level: high
```

**Known false positives:**

- Threat-intel or security staff intentionally visiting the leak site to validate the claim
- Authorized dark-web monitoring or takedown-research tooling

**Tuning notes:** Swap sourcetype/index for your proxy (zscaler:nss:web, pan:traffic, bluecoat). Exclude CTI analyst source hosts. Treat generic_onion hits as medium priority and byod_leak_site/byod_x_account as high. Note: x.com path is only visible with TLS inspection; otherwise match on DNS for x.com from unusual hosts is too noisy.

### 8 more detection rules (Splunk SPL, Microsoft KQL, Sigma), unlock with TL Creds

- Rclone / MEGA Cloud-Sync Tool Used for Bulk Data Exfiltration (locked: unlock with TL Creds)
- Credential Hunting for AWS Keys and SMTP/API Secrets on Endpoints (locked: unlock with TL Creds)
- Tor Client Execution on Endpoint (Anonymised Exfiltration / Leak-Site Access Path) (locked: unlock with TL Creds)
- Session Messenger Infrastructure Lookups (BYOD Negotiation Channel) (locked: unlock with TL Creds)
- AWS GetCallerIdentity by IAM User From CLI/SDK (Stolen Key Validation) (locked: unlock with TL Creds)
- IAM Access Key or Login Profile Created for a Different User (SMTP/API Credential Persistence) (locked: unlock with TL Creds)
- Bulk S3 Object Download by Single IAM Principal (Cloud Storage Data Theft) (locked: unlock with TL Creds)
- AWS Secrets Manager / SSM Parameter Enumeration Burst (locked: unlock with TL Creds)

Sign up free to unlock the detection rules: https://threadlinqs.com/?modal=signup

## Sample indicators (1 of 11)

Defanged, TLP:CLEAR.

- Domain: `byodxn5s7sua6oyyjj74rycgn6afncfckprt5ezskt3cni6lg3wdrgad[.]onion`

Full set of 11 indicators unlocks with TL Creds: https://threadlinqs.com/tl-creds

## Sources

- [BYOD Ransomware Group Allegedly Claims Toyota Data Breach](https://cybersecuritynews.com/toyota-data-breach-claim/)
- [BYOD Ransomware Group Profile - Breachsense](https://www.breachsense.com/ransomware-groups/byod/)
- [BYOD Ransomware Tracker - WatchGuard](https://www.watchguard.com/wgrd-security-hub/ransomware-tracker/byod)
- [BYOD Adversary Profile - TheHackerWire](https://www.thehackerwire.com/?p=29362)
- [Ransom! Franklin Empire (OCT-2026) - BYOD claim](https://www.hendryadrian.com/?p=114972)
- [BYOD ransomware - SOCRadar](https://socradar.io/data-breach/ransomware/byod/)
- [Toyota data breach confirmed following ZeroSevenGroup leak (separate 2024 incident, context only)](https://msspalert.com/brief/toyota-data-breach-confirmed-following-zerosevengroup-leak)

## Full data

The other 8 detection rules (Splunk SPL / Microsoft KQL / Sigma) unlock with TL Creds; a free account includes daily creds: https://threadlinqs.com/?modal=signup
Indicator values unlock with TL Creds, at a lower price on Red and Purple; AI agents can query rules and IOCs through the Threadlinqs MCP server (Purple): https://intel.threadlinqs.com/mcp

Canonical: https://intel.threadlinqs.com/threat/TL-2026-5669