Was Reanthong Partcenter hit by ransomware?

Reanthong Partcenter was listed by the thegentlemen ransomware operation (Thailand), 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 Reanthong Partcenter breach?

thegentlemen published data attributed to Reanthong Partcenter. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Reanthong Partcenter

Claimed by Thegentlemen · listed 3 months ago

Age

since listed · data leaked

Status timeline

ListedMar 4, 2026
Data leakeddate unknown

At a glance

Group: Thegentlemen
Status: Data leaked
Country: Thailand
Listed on leak site: Mar 4, 2026

About the victim

AI dossier — public-source company profile

Reanthong Partcenter Co., Ltd. is a Thai manufacturer specialising in LPG cylinder valves, brass fittings, and gas accessories, operating for over 32 years. The company is ISO 9001 certified and holds multiple international product approvals including European EN/TPED, UL, and various Asian standards. It serves clients worldwide through R&D, manufacturing, sales, and service operations based in Bangkok, Thailand.

Industry: Industrial Valves & Gas Accessories Manufacturing
Address: 555, Onnuch 66, Sukhumvit 77 Rd., Suanluang, Bangkok 10250, Thailand

Attack summary

Severity: medium — Data is marked as published, indicating confirmed exfiltration; however, the leak post is inaccessible due to a browser verification wall, preventing assessment of data volume or sensitivity. No regulated or large-scale PII evidence is available, and the victim is an industrial manufacturer rather than a critical-infrastructure or regulated-data entity.

The group 'thegentlemen' has listed Reanthong Partcenter with a disclosed status of 'data_published', indicating data has been exfiltrated and published. The leak post content is obscured by an anti-bot challenge page, so specific claims about encryption or data categories cannot be verified from the post.

medium

What the group claims

rtvalve.com zoominfo.com/c/reanthong-partcenter-co-ltd/393312914 Reanthong Partcenter Co., Ltd. is a prominent manufacturer in Thailand specializing in LPG Cylinder Valves, Brass Fittings, and Gas Accessories with over 32 years of expertise. The company focuses on research and development, manufacturing, sales, and high-quality service, holding ISO9001 certification and various international approvals. Their RT valve products for LPG cylinders are known for their superb quality, competitive pricing, and impressive customer service. Reanthong Partcenter serves clients and customers worldwide, ensuring high standards in their offerings

The leak post

captured from the group's site

Gentlecloud Protection 🛡️ Gentlecloud Verifying your browser... Initializing security checks... I'm not a bot

Sources

Victim sitertvalve.com
Leak posthttp://tezwsse5czllksjb7cwp65rvnk4oobmzti2znn42i43bjdfd2prqqkad.onion

Source

Indexed 3 months 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 483 public disclosures across our corpus. First observed on a leak site on September 9, 2025; most recent post June 11, 2026. The operation is currently active.

Also tracked as: the gentlemen.

Timeline of this disclosure

March 4, 2026Reanthong Partcenter listed by thegentlemenon the group's public leak site

Other recent disclosures by thegentlemen

thegentlemen has been linked to 483 public victims on Darkfield. A sample of the most recent:

See the full thegentlemen dossier →

Sector and geography

Geographically, Reanthong Partcenter is reported in Thailand, a country with 45 ransomware disclosures in our corpus.

If your organisation is affected

A listing by thegentlemen means Reanthong Partcenter 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.