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Cyber Threat
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Ransomware victim Professional Services

AECOM

Listed by Metaencryptor on · organisation based in United States

aecom.com

Disclosed
Sep 17, 2026
Leak-site listing date
Threat group
Metaencryptor
55 victims listed
Country
United States
#1 most targeted
Sector
Professional Services

ThreatAI analysis

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

About AECOM

AECOM is a leading U.S.-based global infrastructure consulting and engineering company. It provides design, engineering, construction management, and advisory services for major infrastructure projects across transportation, water, energy, buildings, environmental services, and government markets. AECOM operates worldwide and serves public- and private-sector clients.

Source record: ransomware.live

About the Metaencryptor group

MetaEncryptor is a ransomware group first observed in mid-2023, targeting medium-to-large enterprises in legal, technology, logistics, manufacturing, and finance sectors primarily in the UK, Europe, and Southeast Asia, using AES-256/RSA-2048 encryption and double extortion. Metaencryptor has listed 55 victims since August 2023.

Incident analysis

AECOM was listed by Metaencryptor ransomware, a group with 55 victims recorded in this database. The listing appeared on the group's leak site on September 17, 2026.

AECOM is based in United States and operates in the Professional Services sector. United States ranks #1 worldwide for ransomware disclosures, with 10,292 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.

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files are encrypted, so the victim faces two demands at once — pay to restore access, and pay to keep stolen data unpublished.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

Yes. AECOM was listed as a victim of the Metaencryptor ransomware group on September 17, 2026. The organisation is based in United States and operates in the Professional Services sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked AECOM?

AECOM was attacked by Metaencryptor ransomware. Metaencryptor is one of the most active ransomware groups, having claimed 55 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the AECOM ransomware attack occur?

The ransomware attack on AECOM was disclosed on September 17, 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 AECOM ransomware attack?

The specific data stolen from AECOM 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, AECOM likely held sensitive business data, client information, and operational records.

How can organisations protect against Metaencryptor attacks?

To defend against Metaencryptor 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.