---
title: "US Department of Energy security incident"
description: "What the retained public evidence establishes about the US Department of Energy incident, its attack path, impact, and response."
incident_type: "Cybersecurity incident"
status: "active"
last_modified: "2026-09-19"
canonical_url: "https://www.ally.security/incidents/us-department-of-energy-security-incident-2023"
markdown_url: "https://www.ally.security/incidents/us-department-of-energy-security-incident-2023.md"
stix_url: "https://www.ally.security/incidents/us-department-of-energy-security-incident-2023/stix.json"
---

# US Department of Energy security incident

MOVEit/Cl0p. Data from DOE entities exposed.

Last modified Sep 19, 2026 · 1 source

## Summary

- **Environment:** Federal government
- **Operational impact:** Data from DOE entities exposed
- **Financial impact:** No financial figure is established by the reviewed source evidence

## What happened

In 2023, US Department of Energy experienced an incident in its federal government environment. The retained source describes the attack path as follows: MOVEit/Cl0p. [1](#source-1)

The documented consequence was: Data from DOE entities exposed. [1](#source-1)

## Impact

- Documented impact: Data from DOE entities exposed. [1](#source-1)
- No financial loss, ransom amount, recovery cost, or regulatory penalty is established by the reviewed source evidence.

## Timeline

### June 15, 2023 — Documented public update

The [Two Energy Department entities breached as part of massive MOVEit compromise](https://cyberscoop.com/energy-department-cl0p-moveit-cisa/) records the incident facts used in this briefing. [1](#source-1)

### September 19, 2026 — Briefing updated

This briefing was last reviewed and updated on September 19, 2026.

## Threat Group & Attack Vector

The retained source describes the attack path as follows: MOVEit/Cl0p. The canonical record does not add intrusion steps beyond those supported by the source. [1](#source-1)

### Actors

- **Cl0p** — identified in the supported attack description. [1](#source-1)

### TTPs

- No specific MITRE ATT\&CK technique is currently mapped for this case.

## Response

The retained source reports coordination with law enforcement as part of the incident response. [1](#source-1)

This account is bounded to [Two Energy Department entities breached as part of massive MOVEit compromise](https://cyberscoop.com/energy-department-cl0p-moveit-cisa/). Details absent from that evidence are left unresolved rather than inferred. [1](#source-1)

## Assets

[Download the case-scoped STIX 2.1 bundle](<https://www.ally.security/incidents/us-department-of-energy-security-incident-2023/stix.json>)

## Sources

Primary source records used to research this incident.

<a id="source-1"></a>

### Two Energy Department entities breached as part of massive MOVEit compromise

news · CyberScoop

<https://cyberscoop.com/energy-department-cl0p-moveit-cisa/>

<details>
<summary>Evidence ledger</summary>

Review the supporting structured claims.

1. **Occurred At · 100% confidence · current**  
   Documented public update: 2023-06-15
2. **Affected Organization · 100% confidence · current**  
   US Department of Energy security incident: US Department of Energy
3. **Resulted In · 95% confidence · current**  
   US Department of Energy security incident: MOVEit/Cl0p.
4. **Resulted In · 100% confidence · current**  
   US Department of Energy security incident: The reviewed source documents the us department of energy security incident involving US Department of Energy.
5. **Resulted In · 90% confidence · current**  
   US Department of Energy security incident: The retained source reports coordination with law enforcement as part of the incident response.
6. **Resulted In · 88% confidence · current**  
   US Department of Energy security incident: Data from DOE entities exposed.

</details>