Was plasmatherm.com hit by ransomware?

plasmatherm.com was listed by the blackbasta ransomware operation (United States), 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 blackbasta ransomware group?

blackbasta 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 plasmatherm.com breach?

blackbasta published data attributed to plasmatherm.com (~1.5 TB), around 7. Customers records. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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plasmatherm.com

Claimed by Blackbasta · listed 1 year ago

1.5 TB

Data size

7. Customers records

17m

Age

since listed · data leaked

Status timeline

ListedJan 11, 2025
Data leakeddate unknown

At a glance

Group: Blackbasta
Status: Data leaked
Country: United States
Sector: Technology
Listed on leak site: Jan 11, 2025
Data size: 1.5 TB
Records: 7. Customers

About the victim

AI dossier — public-source company profile

Plasma-Therm is a global manufacturer of advanced plasma-processing equipment serving the semiconductor industry for over 50 years. Based in Saint Petersburg, Florida, the company designs and builds configurable wafer processing platforms for etch, deposition, thermal processing, and plasma dicing applications used in microelectronics manufacturing, MEMS, solid-state lighting, and renewable energy sectors.

Industry: Semiconductor Equipment Manufacturing
Address: 10050 16th Street North, Saint Petersburg, FL 33716, United States
Founded: 1974

Attack summary

Severity: critical — Confirmed exfiltration and publication of 1.5 TB of sensitive data including employee PII, proprietary engineering/CAD materials, financial records, customer data, and R&D information from a critical semiconductor equipment manufacturer. The data involves both regulated personal information and valuable intellectual property.

BlackBasta claims to have exfiltrated approximately 1.5 TB of data from Plasma-Therm, including financial records, contracts, employee personal data, CAD/engineering drawings, HR records, R&D materials, and customer information. The group has published the data.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Financial data and accounting records
Contracts and NDAs
Employee personal data and home folders
CAD designs and technical drawings
Human Resources records
R&D and engineering documentation
Customer data

What the group claims

Plasma-Therm is a prominent global manufacturer specializing in advanced plasma-processing equipment, particularly for the semiconductor industry. Established over 50 years ago, the company provides essential technologies such as etching, deposition, and plasma dicing, which are integral to various applications including semiconductor packaging, solid-state lighting, MEMS (Micro-Electro-Mechanical Systems), and renewable energy.SITE: www.plasmatherm.comADDRESS: 10050 16th Street North Saint Petersburg, FL 33716 United StatesTEL#: +1 (727) 577-4999ALL DATA SIZE: ≈1.5tb+ 1. Financial data, Accounting 2. Contracts, Confidential, NDA’s 3. Home folders, Personal employees data 4. CAD, Projects, Drawings 5. Human Resources 6. R&D, Engeneering 7. Customers data & etc…

Sources

Victim siteplasmatherm.com
Leak posthttp://stniiomyjliimcgkvdszvgen3eaaoz55hreqqx6o77yvmpwt7gklffqd.onion/?id=plasmatherm.com

Source

Indexed 1 year 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 blackbasta

Black Basta is a financially motivated ransomware group that emerged in April 2022 and has rapidly established itself as a significant threat actor, compromising over 500 organizations globally within its first two years of operation. The group is suspected to have ties to Russia-based cybercriminal networks and operates as a Ransomware-as-a-Service (RaaS) model, recruiting affiliates to conduct attacks while the core group maintains the ransomware infrastructure and negotiates with victims. Black Basta primarily gains initial access through phishing campaigns, exploitation of unpatched vulnerabilities, and compromised Remote Desktop Protocol (RDP) credentials, then deploys custom tools and living-off-the-land techniques to move laterally through networks before deploying their ransomware payload that uses ChaCha20 encryption. The group employs double extortion tactics, stealing sensitive data before encryption and threatening to publish it on their leak site if ransom demands are not met. Notable campaigns include attacks on major manufacturing companies, healthcare organizations, and critical infrastructure entities primarily across the United States, United Kingdom, Germany, Canada, and Italy, with the group showing particular focus on business services, manufacturing, technology, agriculture and food production, and transportation/logistics sectors. As of 2024, Black Basta remains active and continues to evolve its tactics, techniques, and procedures while maintaining a steady pace of victim recruitment and ransom collection operations. The group has been linked to 523 public disclosures across our corpus. First observed on a leak site on April 26, 2022; most recent post January 11, 2025. The operation is currently inactive.

Timeline of this disclosure

January 11, 2025plasmatherm.com listed by blackbastaon the group's public leak site

Data size: 1.5 TB
Records: 7. Customers

Other recent disclosures by blackbasta

blackbasta has been linked to 523 public victims on Darkfield. A sample of the most recent:

See the full blackbasta dossier →

Sector and geography

This disclosure adds to ransomware activity in the Technology sector, which has 2,526 disclosures indexed across all operators we track. Geographically, plasmatherm.com is reported in United States, a country with 7,392 ransomware disclosures in our corpus.

If your organisation is affected

A listing by blackbasta means plasmatherm.com 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 blackbasta'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.