Disclosure context

About chaos

Based on the limited publicly available information, Chaos is a recently emerged ransomware group that was first observed in March 2025, appearing to be financially motivated given their ransom demands and targeting patterns. The group's origin and specific affiliations remain unclear due to their recent emergence, though their operational model and whether they operate as Ransomware-as-a-Service or as an independent entity has not been definitively established by security researchers. Their attack methodology and specific technical capabilities are not yet well-documented in public threat intelligence reports, though their targeting suggests they employ common initial access vectors to compromise victims across multiple sectors. Chaos has claimed 41 victims primarily concentrated in the United States, Germany, Poland, Malaysia, and Sweden, with a particular focus on technology companies, financial services, business services, and manufacturing sectors, though the scope and impact of their most significant attacks have not been widely publicized. The group currently appears to be active based on recent victim claims, though comprehensive analysis from major security firms regarding their long-term operational capabilities and potential law enforcement actions remains limited due to their recent emergence in the threat landscape. The group has been linked to 53 public disclosures across our corpus. First observed on a leak site on March 31, 2025; most recent post May 17, 2026. The operation is currently active.

Timeline of this disclosure

May 17, 2026cstindustries.com listed by chaoson 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, cstindustries.com is reported in US, a country with 2,713 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

CST Industries, Inc.

listed as cstindustries.com · Claimed by chaos · listed 3 days ago

Age

since listed · data leaked

Status timeline

Listed
May 17, 2026
Data leaked

At a glance

Group: chaos
Status: Data leaked
Country: US
Sector: Manufacturing
Listed on leak site: May 17, 2026

About the victim

AI dossier — public-source company profile

CST Industries, Inc. is a US-based manufacturer and construction company founded in 1893, specializing in industrial storage tanks and covers. The company serves sectors such as water and wastewater, oil and gas, and agriculture. It is headquartered in the United States and operates across multiple industrial markets.

Industry: Industrial Storage & Tank Manufacturing
Employees: 201-500
Founded: 1893

Attack summary

Severity: high — The group claims confirmed exfiltration of confidential company data and has disclosed the victim with a publication threat; the status is 'data_published', indicating data has been or is being released, representing significant business data exposure.

The Chaos ransomware group claims to have exfiltrated confidential organizational data from CST Industries and issued a 72-hour ultimatum for management to make contact, threatening to publish the data on their public platform if demands are not met.

high

Data the group says was taken

AI dossier — extracted from the leak post

Confidential business data
Organizational records

What the group claims

Company management has exactly 72 hours to contact us. Otherwise, the organization’s data—which contains confidential information—will be published on our public platform, and the possibility of further negotiations will be ruled out. Founded in 1893, CST is a manufacturer and construction co…

Sources

Source

Indexed 3 days 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.