Was donjon hit by ransomware?

donjon was listed by the Deadlock ransomware operation (Singapore), 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 Deadlock ransomware group?

Deadlock 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 donjon breach?

Deadlock published data attributed to donjon. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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donjon

Claimed by Deadlock · listed 4 hours ago

Today

Age

since listed · data leaked

Status timeline

ListedJun 15, 2026
Data leakeddate unknown

At a glance

Group: Deadlock
Status: Data leaked
Country: Singapore
Sector: Business Services
Listed on leak site: Jun 15, 2026

About the victim

AI dossier — public-source company profile

Donjon Pte Ltd is a Singapore-based provider of mechanical and electrical (M&E) engineering services established in 2003. A registered Building and Construction Authority (BCA) contractor, they serve commercial, industrial, and residential sectors with offerings including electrical engineering, renewable energy, generator maintenance, HVAC systems, and integrated building services.

Industry: Mechanical & Electrical Engineering Services
Address: 25 Kian Teck Drive, Singapore 628842
Founded: 2003

Attack summary

Severity: low — The leak post provides only a basic company description with no evidence of data exfiltration, proof files, screenshots, or operational impact. Disclosed status indicates data_published but no actual data inventory or proof count is documented.

The Deadlock group claims to have compromised Donjon Pte Ltd. No specific details are provided regarding encryption, exfiltration, or data types exposed in the truncated leak post.

low

What the group claims

Donjon Pte Ltd a trusted provider of mechanical and electrical (M&E) engineering services based in Singapore. Established in 2003, the company is a registered contractor with the Building and Construction Authority (BCA). They cater to commercial, industrial, and residential sectors.

Sources

Victim sitedonjon.com.sg

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 Deadlock

Deadlock is a ransomware operator currently tracked by Darkfield. The group has been linked to 10 public disclosures across our corpus. First observed on a leak site on June 15, 2026. The operation is currently active.

Timeline of this disclosure

June 15, 2026donjon listed by Deadlockon the group's public leak site

Other recent disclosures by Deadlock

Deadlock has been linked to 10 public victims on Darkfield. A sample of the most recent:

See the full Deadlock dossier →

Sector and geography

This disclosure adds to ransomware activity in the Business Services sector, which has 3,795 disclosures indexed across all operators we track. Geographically, donjon is reported in Singapore, a country with 42 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Deadlock means donjon 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, SingCERT (Singapore), as required for your jurisdiction.
Monitor for the data appearing on Deadlock'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.