Disclosure context

About Blackbyte

BlackByte is a ransomware-as-a-service (RaaS) operation that emerged in October 2021, primarily motivated by financial gain through double extortion tactics targeting organizations across multiple sectors. The group is suspected to operate from Russia or former Soviet states based on their use of Russian-language forums and avoidance of targeting organizations in Commonwealth of Independent States countries, though they maintain no confirmed links to other established ransomware families. BlackByte operators typically gain initial access through vulnerable Microsoft Exchange servers, phishing campaigns, and exploitation of remote desktop protocol (RDP) services, employing tools such as Cobalt Strike for lateral movement and data exfiltration before deploying their custom ransomware payload that uses AES-256 encryption with RSA-2048 key protection. The group has demonstrated particular focus on critical infrastructure sectors, with the FBI and CISA issuing joint advisories in February 2022 highlighting attacks against organizations in government, healthcare, manufacturing, and education sectors, including notable incidents affecting San Francisco's transportation authority and multiple healthcare systems across the United States. BlackByte remains active as of 2024, continuing to evolve their tactics and maintain their leak site for publishing stolen data from victims who refuse to pay ransoms. The group has been linked to 147 public disclosures across our corpus. First observed on a leak site on October 4, 2021; most recent post July 30, 2025. The operation is currently inactive.

Timeline of this disclosure

July 3, 2023Brett Martin listed by Blackbyteon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Manufacturing sector, which has 2,458 disclosures indexed across all operators we track. Geographically, Brett Martin is reported in United Kingdom, a country with 902 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

Brett Martin

Claimed by Blackbyte · listed 3 years ago

35m

Age

since listed · data leaked

Status timeline

Listed
Jul 3, 2023
Data leaked

At a glance

Group: Blackbyte
Status: Data leaked
Country: United Kingdom
Sector: Manufacturing
Listed on leak site: Jul 3, 2023

About the victim

AI dossier — public-source company profile

Brett Martin is a UK-based global manufacturer of specialist plastic products, founded in 1958. Its product portfolio spans plastic sheets, factory-engineered rooflight systems, and plumbing and drainage systems, serving sectors including construction, fabrication, agriculture, and print and display. The company exports to over 70 countries and employs approximately 1,050 staff.

Industry: Plastic Products Manufacturing (Construction, Fabrication, Print & Display)
Employees: 1050
Founded: 1958

Attack summary

Severity: high — Data has been confirmed as published by the ransomware group against a sizeable (1,050-employee) global manufacturer, indicating confirmed exfiltration of significant business data; while no regulated PII at scale is explicitly confirmed, the scale of the organisation and published status elevates this above medium.

BlackByte claims to have compromised Brett Martin and has published data (disclosed status: data_published), indicating exfiltration of company data. No specific ransom amount or data volume has been stated in the post.

high

Data the group says was taken

AI dossier — extracted from the leak post

Company business data
Operational/manufacturing records
Potentially employee records
Potentially customer/supplier records

What the group claims

Established in 1958, Brett Martin is a global player supplying specialist plastic products for the construction, fabrication, and, print and display sectors worldwide. The company’s product portfolio includes an impressive range of plastic sheets, factory engineered rooflight systems, and, plumbing and drainage systems.

Sources

Victim sitebrettmartin.com

Source

Indexed 3 years 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.