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Cyber Threat
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Ransomware victim Professional Services

ARCA UNLIMITED Architects

Listed by Blacklocks on · organisation based in South Africa

Disclosed
Sep 26, 2026
Leak-site listing date
Threat group
Blacklocks
4 victims listed
Country
South Africa
#31 most targeted
Sector
Professional Services

ThreatAI analysis

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

Blacklocks listed ARCA UNLIMITED Architects on its dark web leak site on 26 September 2026; the South African firm operates in the Professional Services sector.

About the Blacklocks group

Blacklocks has listed 3 victims since September 2026.

Incident analysis

ARCA UNLIMITED Architects was listed by Blacklocks ransomware, a group with 4 victims recorded in this database. The listing appeared on the group's leak site on September 26, 2026.

ARCA UNLIMITED Architects is based in South Africa and operates in the Professional Services sector. South Africa ranks #31 worldwide for ransomware disclosures, with 109 victims in this database.

Sector context. Organisations in this sector hold valuable data and operational systems that ransomware groups seek to exploit for financial gain through encryption and data exfiltration.

Blacklocks 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files are encrypted, so the victim faces two demands at once — pay to restore access, and pay to keep stolen data unpublished.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 ARCA UNLIMITED Architects attacked by ransomware?

Yes. ARCA UNLIMITED Architects was listed as a victim of the Blacklocks ransomware group on September 26, 2026. The organisation is based in South Africa and operates in the Professional Services sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked ARCA UNLIMITED Architects?

ARCA UNLIMITED Architects was attacked by Blacklocks ransomware. Blacklocks is one of the most active ransomware groups, having claimed 4 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the ARCA UNLIMITED Architects ransomware attack occur?

The ransomware attack on ARCA UNLIMITED Architects was disclosed on September 26, 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 ARCA UNLIMITED Architects ransomware attack?

The specific data stolen from ARCA UNLIMITED Architects 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 Professional Services organisation, ARCA UNLIMITED Architects likely held sensitive business data, client information, and operational records.

How can organisations protect against Blacklocks attacks?

To defend against Blacklocks 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.