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AECOM Ransomware Attack

aecom.comRansomed

Brain Cipher RansomwareGroup

United StatesCountry

Sep 17, 2026Discovered

Overview

View group profile

Domain

aecom.com

Industry

Professional Services

Country

United States

Discovered

26 days ago

Attack date

Sep 17, 2026

Confidence

85%

Severity

Medium

Status

Claimed

Threat group

Brain Cipher Ransomware

Total victims

First seen

Oct 2025

Last seen

Oct 2026

Group status

active

Sophistication

Impact score

Threat level

3.5/10

Aggressiveness6/10

Lethality1/10

Criticality3.4/10

Status breakdown

Data Leaked23.0%14

Claimed

this victim

77.0%47

Targeted sectors

Education Energy & Utilities Financial Services Government & Defense Healthcare Hospitality Manufacturing Other Professional Services Retail & E-Commerce Technology Transportation

Victim's position within group

Industry

Professional Services

Known target sector

Country

United States

Frequently targeted country

Other victims

View all (61)

Same group · Brain Cipher Ransomware

Group activity

Monthly attacks · Brain Cipher Ransomware

total · avg 5.5/mo