Was Lawson Software hit by ransomware?

Lawson Software 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 Lawson Software breach?

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

Ransomware victim disclosure

← All victims

Lawson Software

Claimed by Thegentlemen · listed 2 months ago

47d

Age

since listed · data leaked

Status timeline

ListedApr 26, 2026
Data leakeddate unknown

At a glance

Group: Thegentlemen
Status: Data leaked
Country: Thailand
Sector: Business Services
Listed on leak site: Apr 26, 2026

About the victim

AI dossier — public-source company profile

Lawson Software (Thailand) Co., Ltd. is a Bangkok-based IT consulting firm specializing in ERP implementation and business software solutions, including SAP S/4HANA, SAP Business ByDesign, and SAP Business One. Founded in 1999, the company serves clients across industries such as construction, food & beverage, manufacturing, automotive, and wholesale distribution. It operates with a team of 11–50 employees and positions itself as Thailand's leading specialist in consulting and implementation of software packages.

Industry: ERP Consulting & Business Software Implementation
Address: Gypsum Metropolitan Tower, Si Ayutthaya Road, Ratchathewi, Bangkok, Thailand
Employees: 11-50
Founded: 1999

Attack summary

Severity: medium — Data has been published (disclosed status: data_published), indicating confirmed exfiltration rather than a mere listing. However, no specific sensitive regulated data (e.g., medical, financial at scale, government) is confirmed, the company is small (11–50 employees), and no data volume or detailed inventory is provided, limiting the assessed severity to medium.

The group 'thegentlemen' claims to have compromised Lawson Software (Thailand) Co., Ltd. and has disclosed data (status: data_published), though no specific ransom amount or data volume has been stated. The nature of the exfiltrated data has not been explicitly detailed in the leak post.

medium

Data the group says was taken

AI dossier — extracted from the leak post

Business data
Client information
Internal company records

What the group claims

lawson.co.th zoominfo.com/c/lawson-software-co-ltd/454540883 Lawson Software (Thailand) Co., Ltd. is a Bangkok-based IT consulting firm specializing in ERP (Enterprise Resource Planning) implementation and business software solutions, founded in 1999. The company is headquartered at Gypsum Metropolitan Tower, Si Ayutthaya Road, Ratchathewi, Bangkok, and has a team of 11–50 employees

Sources

Victim sitelawson.co.th

Source

Indexed 2 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.

Is this your supplier? Your competitor? You?

Pro plans monitor your domain, corporate emails, and crypto wallets across every new ransomware leak-site post, breach dump and Telegram callout — alerts within 5 minutes.

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

April 26, 2026Lawson Software 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

This disclosure adds to ransomware activity in the Business Services sector, which has 2,643 disclosures indexed across all operators we track. Geographically, Lawson Software is reported in Thailand, a country with 45 ransomware disclosures in our corpus.

If your organisation is affected

A listing by thegentlemen means Lawson Software 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.