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Cocoon

Claimed by Silent · listed 1 year ago

$16.30M
Est. revenue
company size proxy
14m
Age
since listed · data leaked

Status timeline

  1. ListedMay 4, 2025
  2. Data leakeddate unknown

At a glance

Group
Silent
Status
Data leaked
Country
United States
Listed on leak site
May 4, 2025
Estimated revenue
$16.30M

About the victim

AI dossier — public-source company profile

Cocoon, Inc. manufactures specialized corrosion-prevention solutions for aviation and defense applications, including protective covers, aviation insulation, fabric structures, and controlled-environment storage. The company serves primarily U.S. Department of Defense and military readiness markets with an estimated annual revenue of $16.3M.

Industry
Aerospace & Defense - Corrosion Prevention & Protective Solutions
Employees
29

Attack summary

Severity: high — Confirmed data exfiltration from a defense contractor with DoD relationships; sensitive corrosion-prevention technology and potentially classified/controlled unclassified information (CUI) at risk. Small company size (29 employees) suggests concentrated impact on operations.

The Silent group claims to have exfiltrated data from Cocoon, Inc. and published it. No specific details on data type or operational disruption are stated in the available post excerpt.

high

Data the group says was taken

AI dossier — extracted from the leak post
  • Business records
  • Technical documentation
  • Customer information
  • Defense-related project data

What the group claims

Country: United States | Revenue: 16.30M USD | Employees: 29 | Tags:

Sources

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 silent

The Silent ransomware group is a newly emerged cybercriminal organization first observed in April 2025, appearing to be financially motivated based on their ransomware operations targeting organizations primarily in the United States and Canada. Given the group's recent emergence and limited public documentation, their specific country of origin and operational structure remain unclear, though their targeting patterns suggest a focus on English-speaking markets. With only six known victims documented to date, detailed information about their attack methodology, encryption techniques, and specific tools remains limited in publicly available threat intelligence reporting. The group has demonstrated a preference for targeting technology companies, manufacturing organizations, and public sector entities, though the small victim sample size makes broader targeting pattern analysis preliminary. Due to the group's recent emergence in April 2025, there are no widely reported major campaigns or law enforcement actions documented by established security researchers or government agencies. Silent remains active as of current reporting, though their limited victim count and recent emergence suggest they are either a new player in the ransomware ecosystem or operate with a highly selective targeting approach. The group has been linked to 6 public disclosures across our corpus. First observed on a leak site on April 23, 2025; most recent post June 21, 2025. The operation is currently inactive.

Timeline of this disclosure

  • May 4, 2025Cocoon listed by silenton the group's public leak site

Other recent disclosures by silent

silent has been linked to 6 public victims on Darkfield. A sample of the most recent:

See the full silent dossier →

Sector and geography

Geographically, Cocoon is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by silent means Cocoon 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.
  • Report the incident to your national CERT, CISA (United States), as required for your jurisdiction.
  • Monitor for the data appearing on silent'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.