# ADT suffers LockBit ransomware attack

Published: 2026-08-23 · Severity: routine · Sectors: technology
Canonical: https://vorant.io/reports/39361bd8-1edd-5033-b77e-3abe77cb2cb0/adt-suffers-lockbit-ransomware-attack

> LockBit claims breach of ADT with 120 compromised employees and 1572 user accounts affected.

ADT Corporation has been listed as a victim by LockBit ransomware operators on the ransomware.live leak site. The attack resulted in the compromise of 120 employees and 1572 user accounts. Attackers also obtained 105 third-party employee credentials and identified 139 points on the victim's external attack surface. LockBit operators publicly disclosed the incident as part of their leak-shaming campaign, which is typical behavior for this ransomware-as-a-service operation. The breach indicators suggest reconnaissance and credential harvesting preceded the deployment of ransomware. The incident demonstrates how infostealers and compromised credentials lead to subsequent ransomware attacks against major organizations.

## Mentioned in this report

- Threat actors: LockBit
- Malware: LockBit

1 detection for this report is in the app: the rules that match its indicators, the Sigma rules already converted to Splunk SPL, to Elastic where their fields map onto Elastic's integrations and to Microsoft Defender XDR KQL wherever Defender records the activity, and the YARA and Suricata. A new account gets three days of them free.

Source reporting: https://www.ransomware.live/id/YWR0LmNvbUBsb2NrYml0NQ==

---

This is the free public brief from Vorant Threat Intelligence. When citing, attribute "Vorant" and link https://vorant.io/reports/39361bd8-1edd-5033-b77e-3abe77cb2cb0/adt-suffers-lockbit-ransomware-attack.
In the app the same report carries its extracted indicators, its detections (Splunk SPL already written, plus Elastic and Microsoft KQL where they apply), live profiles of the actors and CVEs it names, and the vendor research on the same campaign. Slack alerts fire on the vendors, sectors and countries a reader follows. A new account starts with three days of all of it, no card: https://vorant.io/signup