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Ransomware victim

www.ptesm.com

Listed by Blackwater on · organisation based in Portugal

www.ptesm.com

Disclosed
Aug 24, 2026
Leak-site listing date
Threat group
Blackwater
11 victims listed
Country
Portugal
#38 most targeted
Sector
Not recorded

ThreatAI analysis

Compiled from this incident record and the threat intelligence profile for Blackwater. Figures and technique mappings are quoted from the source data, not inferred.

Www.ptesm.com was listed on Blackwater's dark web leak site on 24 August 2026, sinarmas cepsa pte ltd produces and markets oleochemicals like fatty alcohols.

About www.ptesm.com

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

Source record: ransomware.live

About the Blackwater group

Blackwater is a ransomware group that first surfaced in early 2026, combining file encryption with data theft and targeting healthcare organizations, with known victims including Minidoka Memorial Hospital in Idaho. Blackwater has listed 11 victims since April 2026.

Incident analysis

www.ptesm.com was listed by Blackwater ransomware, a group with 11 victims recorded in this database. The listing appeared on the group's leak site on August 24, 2026.

www.ptesm.com is based in Portugal. Portugal ranks #38 worldwide for ransomware disclosures, with 75 victims in this database.

Blackwater typically follows a double extortion model: data is exfiltrated from the victim's systems before files are encrypted, so the victim faces two demands at once — pay to restore access, and pay to keep stolen data unpublished. The leak site, where this listing appeared, is the lever for the second demand.

Source. Public leak-site disclosures aggregated via the ransomware.live API. The disclosure date is when the listing was published, which can differ from the date of compromise. This site does not publish or link to stolen data. Last updated .

Frequently asked questions

Was www.ptesm.com attacked by ransomware?

Yes. www.ptesm.com was listed as a victim of the Blackwater ransomware group on August 24, 2026. The organisation is based in Portugal. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked www.ptesm.com?

www.ptesm.com was attacked by Blackwater ransomware. Blackwater is one of the most active ransomware groups, having claimed 11 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the www.ptesm.com ransomware attack occur?

The ransomware attack on www.ptesm.com was disclosed on August 24, 2026. This date reflects when the victim was published on the threat group's leak site, which may differ from the actual date of initial compromise.

What data was stolen in the www.ptesm.com ransomware attack?

The specific data stolen from www.ptesm.com has not been independently verified by this platform. Ransomware groups typically exfiltrate data before encrypting systems and use the threat of publication to pressure victims. Sensitive business data was likely targeted.

How can organisations protect against Blackwater attacks?

To defend against Blackwater and similar threat actors, organisations should: maintain regular offline backups tested for restoration; implement network segmentation to limit lateral movement; deploy multi-factor authentication on all remote access; use endpoint detection and response (EDR) tools; conduct regular phishing and security awareness training; and monitor threat intelligence feeds for indicators of compromise (IOCs) associated with active groups.