Disclosure context

About LockBit

LockBit is a highly prolific ransomware group that emerged in October 2020 and has become one of the most active ransomware operations globally, with over 3,500 documented victims and a primary motivation of financial gain through extortion. The group is suspected to originate from Russia and operates as a Ransomware-as-a-Service (RaaS) model, recruiting affiliates to conduct attacks while providing them with ransomware tools, infrastructure, and support. LockBit primarily gains initial access through exploiting vulnerabilities in public-facing applications, credential stuffing attacks, and phishing campaigns, employing double extortion tactics where they steal sensitive data before encrypting systems and threatening to leak the information if ransom demands are not met. The group has demonstrated significant technical sophistication, developing multiple variants including LockBit 3.0 (also known as LockBit Black), and has been particularly active in targeting business services, manufacturing, technology, and healthcare sectors across the United States, France, Germany, United Kingdom, and Italy. Despite ongoing law enforcement efforts and international cooperation to disrupt their operations, including seizures of infrastructure and arrests of affiliates, LockBit has shown resilience and adaptability, continuing to operate and evolve their tactics while maintaining their position as one of the most dominant ransomware threats in the cybercriminal landscape. The group has been linked to 3,536 public disclosures across our corpus. First observed on a leak site on October 21, 2020; most recent post March 30, 2026. The operation is currently active.

Also tracked as: LockBit 3.0, LockBit Black, LockBit Green, ABCD ransomware.

Timeline of this disclosure

February 23, 2026mengseng.com listed by LockBiton the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Not Found sector, which has 4,859 disclosures indexed across all operators we track. Geographically, mengseng.com is reported in Thailand, a country with 10 ransomware disclosures in our corpus.

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.

Ransomware victim disclosure

← All victims

Meng Seng Plastic Co., Ltd.

listed as mengseng.com · Claimed by LockBit · listed 3 months ago

Age

since listed · data leaked

Status timeline

Listed
Feb 23, 2026
Data leaked

At a glance

Group: LockBit
Status: Data leaked
Country: Thailand
Sector: Not Found
Listed on leak site: Feb 23, 2026

About the victim

AI dossier — public-source company profile

Meng Seng Plastic Co., Ltd. is a Thailand-based comprehensive manufacturer of plastic packaging products, including cosmetic packaging and pharmaceutical packaging. The company operates as a full-service plastics manufacturer serving multiple consumer and industrial sectors. Its website is hosted at mengseng.com.

Industry: Plastic Packaging Manufacturing

Attack summary

Severity: high — Data has been confirmed published by LockBit, indicating successful exfiltration of business data from a manufacturing company. While no regulated personal or medical data at scale is explicitly confirmed, the data_published status and LockBit's typical exfiltration methodology elevate this beyond medium severity.

LockBit claims to have attacked Meng Seng Plastic Co., Ltd. and has published data (disclosed status: data_published), indicating exfiltration of company data. No ransom amount or specific data volume was stated in the post.

high

Data the group says was taken

AI dossier — extracted from the leak post

Business documents
Operational data
Potentially customer/supplier records

What the group claims

Meng Seng Plastic Co., Ltd. is a comprehensive manufacturer of plastic packaging, specializing in co...

Sources

Victim sitemengseng.com

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.