Was Malaysian Nuclear Agency hit by ransomware?

Malaysian Nuclear Agency was listed by the thegentlemen ransomware operation (Malaysia), 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 thegentlemen ransomware group?

thegentlemen 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 Malaysian Nuclear Agency breach?

thegentlemen published data attributed to Malaysian Nuclear Agency. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Malaysian Nuclear Agency (Nuklear Malaysia)

listed as Malaysian Nuclear Agency · Claimed by Thegentlemen · listed 4 hours ago

Today

Age

since listed · data leaked

Status timeline

ListedJul 30, 2026
Data leakeddate unknown

At a glance

Group: Thegentlemen
Status: Data leaked
Country: Malaysia
Sector: Government & Defense
Listed on leak site: Jul 30, 2026

About the victim

AI dossier — public-source company profile

The Malaysian Nuclear Agency (Nuklear Malaysia) is a government research and development organization focused on peaceful applications of nuclear science and technology. Its mandate includes medical radiopharmaceuticals, food security, industrial safety, radiation safety, human resource development, and radioactive waste management.

Industry: Government & Defense – Nuclear Science & Technology

Attack summary

Severity: critical — Access to a national nuclear research agency constitutes a critical threat due to potential exposure of sensitive government/defense nuclear science data, regulatory information, and operational details—regardless of proof published. The sector alone (nuclear, government) elevates severity to critical.

The group claims access to the Malaysian Nuclear Agency but provides no details on whether data was encrypted, exfiltrated, or both. No specific data types or operational impact are described in the post.

critical

What the group claims

nuclearmalaysia.gov.my zoominfo.com/c/malaysian-nuclear-agency/459120141 The Malaysian Nuclear Agency (Nuklear Malaysia) is the leading government research and development organization in nuclear science and technology. It focuses on the peaceful application of nuclear innovations to support national development, including medical radiopharmaceuticals, food security, and industrial safety. Additionally, the agency plays a key role in radiation safety, human resource development, and the responsible management of radioactive waste in the country

Sources

Victim sitenuclearmalaysia.gov.my

Source

Indexed 4 hours 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 thegentlemen

thegentlemen is a ransomware group that emerged in September 2025, operating with apparent financial motivations based on their broad targeting of commercial sectors. The group has documented 267 victims across multiple countries, with primary focus on the United States, Thailand, France, Brazil, and India. Their targeting strategy demonstrates a preference for high-value sectors including manufacturing, technology, healthcare, and financial services organizations. Given the group's recent emergence and limited public documentation from established threat intelligence sources such as CISA, FBI, or major security research firms, specific details regarding their country of origin, operational structure, attack methodologies, encryption techniques, and whether they employ ransomware-as-a-service models remain unclear. The relatively high victim count of 267 in a short operational timeframe since September 2025 suggests either an aggressive campaign pace or potential inflation of victim numbers through affiliate operations, though without corroborating intelligence reports, the group's exact operational capabilities and notable campaigns cannot be definitively established. Current intelligence indicates the group remains active as of late 2025, though comprehensive threat profiling requires additional validated reporting from authoritative cybersecurity sources. The group has been linked to 664 public disclosures across our corpus. First observed on a leak site on September 9, 2025; most recent post July 30, 2026. The operation is currently active.

Also tracked as: the gentlemen.

Timeline of this disclosure

July 30, 2026Malaysian Nuclear Agency listed by thegentlemenon the group's public leak site

Other recent disclosures by thegentlemen

thegentlemen has been linked to 664 public victims on Darkfield. A sample of the most recent:

See the full thegentlemen dossier →

Sector and geography

This disclosure adds to ransomware activity in the Government & Defense sector, which has 4 disclosures indexed across all operators we track. Geographically, Malaysian Nuclear Agency is reported in Malaysia, a country with 40 ransomware disclosures in our corpus.

If your organisation is affected

A listing by thegentlemen means Malaysian Nuclear Agency 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.
Monitor for the data appearing on thegentlemen'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.