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Sinarmas Cepsa Pte. Ltd.

Claimed by Blackwater · listed 2 hours ago

Today
Age
since listed · listed for ransom

Status timeline

  1. ListedAug 25, 2026

Current state: Listed for ransom

At a glance

Group
Blackwater
Status
Listed for ransom
Sector
Chemicals/Oleochemicals
Listed on leak site
Aug 25, 2026

About the victim

AI dossier — public-source company profile

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.

Industry
Chemicals & Oleochemicals

Attack summary

Severity: high — Confirmed exfiltration of sensitive business data including customer personal data, contracts, and internal/confidential company information from a chemicals manufacturer. The threat of imminent release and encryption of corporate systems indicates both data theft and operational disruption.

The blackwater group claims to have exfiltrated customers' personal data, contract information, internal company data, corporate data, confidential data, and partnership data. The group states that 'confidential data will be released soon' and that 'all corporate data is blocked,' indicating encryption alongside data theft.

high

Data the group says was taken

AI dossier — extracted from the leak post
  • customers' personal data
  • contract information
  • internal company data
  • corporate data
  • confidential data
  • partnership data

What the group claims

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 
customers' personal data, contract information, internal company data: http://ucfhnoihzgx4wz4beyzfxnh46cs37r4zbq627xyctykpatruvmghbyqd.onion/s/7f89713825a4376e/ 
Confidential data will be released soon. 
All corporate data is blocked 
corporate data, confidential data, partnership data : http://ucfhnoihzgx4wz4beyzfxnh46cs37r4zbq627xyctykpatruvmghbyqd.onion/s/4130a6e29aa71362/ 
Compass Housing Alliance is dedicated to developing and providing essential services, shelter, and affordable housing to ensure that everyone in the community has a safe place to call home. 
confidential information, developments, reports and all internal company data : http://ucfhnoihzgx4wz4beyzfxnh46cs37r4zbq627xyctykpatruvmghbyqd.onion/s/e292180d38d92fe2/

Data the group says was taken

  • customers' personal data
  • contract information
  • internal company data

Screenshot of the leak post

Leak screenshot for Sinarmas Cepsa Pte. Ltd.

Sources

Source

Indexed 2 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 14 public disclosures across our corpus. First observed on a leak site on April 12, 2026; most recent post August 25, 2026. The operation is currently active.

Also tracked as: BLACK WATER.

Timeline of this disclosure

  • August 25, 2026Sinarmas Cepsa Pte. Ltd. listed by blackwateron the group's public leak site

Other recent disclosures by blackwater

blackwater has been linked to 14 public victims on Darkfield. A sample of the most recent:

See the full blackwater dossier →

Sector and geography

This disclosure adds to ransomware activity in the Chemicals/Oleochemicals sector.

If your organisation is affected

A listing by blackwater means Sinarmas Cepsa Pte. Ltd. appeared on a ransomware extortion site and is being pressured to pay before any publication. 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 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.