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Cyber Threat
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Ransomware victim Construction

Rasen Insaat Ve Yatirim Ticaret A.S.

Listed by Blackshrantac on · organisation based in Turkey

rasen.com.tr

Disclosed
Nov 29, 2025
Leak-site listing date
Threat group
Blackshrantac
43 victims listed
Country
Turkey
#18 most targeted
Sector
Construction

ThreatAI analysis

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

About the Blackshrantac group

BlackShrantac is a ransomware group that emerged in late 2025, targeting organizations in manufacturing, financial services, technology, and the public sector globally, employing double-extortion combined with living-off-the-land techniques to weaponize legitimate tools and disable defenses before encrypting files. Blackshrantac has listed 43 victims since September 2025.

Incident analysis

Rasen Insaat Ve Yatirim Ticaret A.S. was listed by Blackshrantac ransomware, a group with 43 victims recorded in this database. The listing appeared on the group's leak site on November 29, 2025.

Rasen Insaat Ve Yatirim Ticaret A.S. is based in Turkey and operates in the Construction sector. Turkey ranks #18 worldwide for ransomware disclosures, with 174 victims in this database.

Sector context. Construction firms often hold sensitive project data, client financials, and intellectual property. The industry's typically lean IT security teams can make them more vulnerable.

Blackshrantac 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files are encrypted, so the victim faces two demands at once — pay to restore access, and pay to keep stolen data unpublished.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 Rasen Insaat Ve Yatirim Ticaret A.S. attacked by ransomware?

Yes. Rasen Insaat Ve Yatirim Ticaret A.S. was listed as a victim of the Blackshrantac ransomware group on November 29, 2025. The organisation is based in Turkey and operates in the Construction sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked Rasen Insaat Ve Yatirim Ticaret A.S.?

Rasen Insaat Ve Yatirim Ticaret A.S. was attacked by Blackshrantac ransomware. Blackshrantac is one of the most active ransomware groups, having claimed 43 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the Rasen Insaat Ve Yatirim Ticaret A.S. ransomware attack occur?

The ransomware attack on Rasen Insaat Ve Yatirim Ticaret A.S. was disclosed on November 29, 2025. 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 Rasen Insaat Ve Yatirim Ticaret A.S. ransomware attack?

The specific data stolen from Rasen Insaat Ve Yatirim Ticaret A.S. 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. As a Construction organisation, Rasen Insaat Ve Yatirim Ticaret A.S. likely held sensitive business data, client information, and operational records.

How can organisations protect against Blackshrantac attacks?

To defend against Blackshrantac 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.