Was Idaho National Laboratory hit by ransomware?

Idaho National Laboratory was listed by the Siegedsec ransomware operation (United States), and stolen data was published on the group's leak site. Darkfield tracks this disclosure with the original leak post, screenshot and group context.

Who is the Siegedsec ransomware group?

Siegedsec is a ransomware operator tracked by Darkfield. See the full operator dossier for its known victims, sectors targeted, IOCs and leak-site infrastructure.

What data was leaked in the Idaho National Laboratory breach?

Siegedsec published data attributed to Idaho National Laboratory. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Idaho National Laboratory

Claimed by Siegedsec · listed 3 years ago

31m

Age

since listed · data leaked

Status timeline

ListedDec 8, 2023
Data leakeddate unknown

At a glance

Group: Siegedsec
Status: Data leaked
Country: United States
Sector: Energy & Utilities
Listed on leak site: Dec 8, 2023

About the victim

AI dossier — public-source company profile

Idaho National Laboratory (INL) is a U.S. Department of Energy national laboratory located in Idaho Falls, Idaho, specializing in nuclear energy research, nuclear nonproliferation, and critical infrastructure protection. It is one of the leading nuclear research institutions in the United States, operating under the DOE Office of Nuclear Energy. INL conducts research across advanced nuclear reactor technologies, cybersecurity, and clean energy development.

Industry: Nuclear Energy Research & National Laboratory
Address: 1955 N Fremont Ave, Idaho Falls, ID 83415, United States
Employees: 5000-6000
Founded: 1949

Attack summary

Severity: critical — Idaho National Laboratory is a U.S. federal nuclear research facility handling sensitive national-security-relevant data. Confirmed exfiltration and publication of data from a government nuclear research institution constitutes a critical disclosure involving regulated, sensitive, and potentially classified or export-controlled information with significant national security implications.

SiegedSec claimed an attack on Idaho National Laboratory and published data described as relating to nuclear research, nuclear power, and power plant operations; no ransom demand was stated, indicating the motivation was likely ideological data exposure rather than financial extortion.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Nuclear research data
Nuclear power plant information
Employee records (reported in public coverage)
Internal documents

What the group claims

nuclear research, nuclear power, power plant

Sources

Victim siteinl.gov
Leak posthttp://nv5p2mmpctvyqdyyi5zwh4gnifq2uxdx4etvnmaheqlrw6ordrjwxryd.onion/post/11.html

Source

Indexed 3 years ago

This page surfaces a public ransomware disclosure indexed by Darkfield. Original posts come from the operator's own leak site; we cross-check against ransomware.live, RansomLook and RansomWatch where applicable. Share this URL freely.

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Disclosure context

About Siegedsec

SiegedSec is a relatively new threat actor that emerged in December 2023, primarily motivated by hacktivism with a strong focus on anti-Israeli sentiment rather than traditional financial gain through ransomware operations. The group appears to operate independently with suspected ideological motivations tied to pro-Palestinian activism, though their exact geographic origin remains unclear based on publicly available intelligence. Unlike traditional ransomware groups, SiegedSec appears to focus on data theft and public exposure of sensitive information rather than encryption-based extortion, primarily targeting Israeli government entities through opportunistic attacks that exploit web application vulnerabilities and exposed credentials. The group has maintained a relatively low profile with 19 documented victims, almost exclusively targeting Israeli government infrastructure in what appears to be coordinated ideological attacks rather than broad financial campaigns. Based on available reporting, SiegedSec remains active as of late 2023 and early 2024, continuing their focused campaign against Israeli targets through data exfiltration and public disclosure operations. The group has been linked to 19 public disclosures across our corpus. First observed on a leak site on December 8, 2023; most recent post December 9, 2023. The operation is currently inactive.

Timeline of this disclosure

December 8, 2023Idaho National Laboratory listed by Siegedsecon the group's public leak site

Other recent disclosures by Siegedsec

Siegedsec has been linked to 19 public victims on Darkfield. A sample of the most recent:

See the full Siegedsec dossier →

Sector and geography

This disclosure adds to ransomware activity in the Energy & Utilities sector, which has 163 disclosures indexed across all operators we track. Geographically, Idaho National Laboratory is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Siegedsec means Idaho National Laboratory appeared on a ransomware extortion site and data attributed to it has been published. If this is your organisation, or a supplier you depend on, the priority is to confirm the intrusion and contain it before the window to act closes.

Engage your incident-response team and preserve forensic evidence before remediating — do not wipe affected systems first.
Force a password reset and revoke active sessions for exposed accounts; rotate any credentials, API keys or certificates that may have been in the stolen data.
Assess regulatory notification duties (GDPR, NIS2, sector regulators) — many carry a 72-hour reporting clock from awareness.
Report the incident to your national CERT, CISA (United States), as required for your jurisdiction.
Monitor for the data appearing on Siegedsec's leak site and across paste and breach channels, and brief downstream partners who may be exposed through you.

How we know this. Darkfield monitors public ransomware leak sites continuously, archiving every new disclosure and the data later released against the victim. Each entry on this page is sourced from the operator's own publication and cross-checked against complementary OSINT feeds (RansomLook, ransomware.live, RansomWatch). We do not collect or host stolen data — only the metadata, timestamps and screenshots needed to make the public disclosure searchable and accountable. Records here are corrected when the original post is edited, retracted, or merged with another disclosure.