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Sinarmas Cepsa Pte. Ltd.

listed as www.ptesm.com · Claimed by Blackwater · listed 7 hours ago

Today
Age
since listed · data leaked

Status timeline

  1. ListedAug 24, 2026
  2. Data leakeddate unknown

At a glance

Group
Blackwater
Status
Data leaked
Country
Portugal
Listed on leak site
Aug 24, 2026

About the victim

AI dossier — public-source company profile

Sinarmas Cepsa Pte. Ltd. is a joint venture between Cepsa and Sinar Mas Group that specializes in the production and marketing of oleochemicals, particularly fatty alcohols and their derivatives. The company operates in the chemical manufacturing sector.

Industry
Oleochemicals & Specialty Chemicals

Attack summary

Severity: medium — Data has been published by the threat actor (disclosed status confirmed), but no specific data inventory, proof files, or details of what was compromised are provided in the available leak post excerpt. The lack of concrete evidence or data description prevents classification as 'high' or 'critical', but publication by a ransomware operator elevates it above 'low'.

The blackwater group claims to have attacked Sinarmas Cepsa Pte. Ltd. The leak post does not specify what data was exfiltrated, encrypted, or the nature of the operational impact.

medium

What the group claims

Sinarmas Cepsa Pte. Ltd. is a joint venture between Cepsa and Sinar Mas Group, specializing in the production and marketing of oleochemicals, particularly fatty alcohols and their derivatives

The leak post

captured from the group's site
Sinarmas Cepsa Pte. Ltd. is a joint venture between Cepsa and Sinar Mas Group, specializing in the production and marketing of oleochemicals, particularly fatty alcohols and their derivatives

Sources

Source

Indexed 7 hours 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 blackwater

Based on the limited available data, Blackwater is an obscure ransomware operation that first emerged in April 2026, with only one documented victim to date, suggesting either a very new or small-scale financially motivated cybercriminal group. The group appears to operate primarily in Turkey, specifically targeting the healthcare sector based on their singular known attack. Due to the extremely limited public documentation and recent emergence timeframe, detailed information about their attack methodology, tools, encryption techniques, or operational structure remains unavailable from established threat intelligence sources such as CISA, FBI, or major security research firms. No notable high-profile campaigns, significant ransoms, or law enforcement actions have been publicly documented against this group. Given the recent April 2026 first observation date and lack of comprehensive threat intelligence reporting, the current operational status and capabilities of Blackwater remain largely unknown to the broader cybersecurity community. The group has been linked to 13 public disclosures across our corpus. First observed on a leak site on April 12, 2026; most recent post August 24, 2026. The operation is currently active.

Also tracked as: BLACK WATER.

Timeline of this disclosure

  • August 24, 2026www.ptesm.com listed by blackwateron the group's public leak site

Other recent disclosures by blackwater

blackwater has been linked to 13 public victims on Darkfield. A sample of the most recent:

See the full blackwater dossier →

Sector and geography

Geographically, www.ptesm.com is reported in Portugal, a country with 8 ransomware disclosures in our corpus.

If your organisation is affected

A listing by blackwater means www.ptesm.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.
  • Report the incident to your national CERT, CERT.PT (Portugal), as required for your jurisdiction.
  • Monitor for the data appearing on blackwater'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.