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Ransomware Victim Construction

ACR1.COM Commercial Roofing

Ransomware attack by Qilin · Disclosed March 27, 2026 · 🇺🇸 United States

www.acr1.com

Date Disclosed
Mar 27, 2026
2026
Threat Group
Qilin
2,259 total victims
Country
🇺🇸 United States
Industry
Construction

ThreatAI Analysis

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

About the Qilin group

Qilin ransomware was first observed in July of 2022. Qilin Ransomware is written in Golang and supports multiple encryption modes; all of which are controlled by the operator. Qilin actors practice double extortion – demanding payment for a decryptor, as well as for the non-release of stolen data. Qilin has listed 2,265 victims since October 2022.

How Qilin is documented to operate

Valid Accounts T1078 Stealth Persistence

Adversaries may obtain and abuse credentials of existing accounts as a means of gaining Initial Access, Persistence, Privilege Escalation, or Defense Evasion. Compromised credentials may be used to bypass access controls placed on various resources on systems within the network and may even be used for persistent access to remote systems and externally available services, such as VPNs, Outlook Web Access, network devices, and remote desktop. Compromised credentials may also grant an adversary increased privilege to specific systems or access to restricted areas of the network.

Mitigations: Application Developer Guidance, User Training, Password Policies, User Account Management, Privileged Account Management, Multi-factor Authentication

MITRE ATT&CK reference →
Exploit Public-Facing Application T1190 Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network. The weakness in the system can be a software bug, a temporary glitch, or a misconfiguration. Exploited applications are often websites/web servers, but can also include databases (like SQL), standard services (like SMB or SSH), network device administration and management protocols (like SNMP and Smart Install), and any other system with Internet-accessible open sockets. On ESXi infrastructure, adversaries may exploit exposed OpenSLP services; they may alternatively exploit exposed VMware vCenter servers.

Mitigations: Vulnerability Scanning, Limit Access to Resource Over Network, Filter Network Traffic, Network Segmentation, Privileged Account Management, Application Isolation and Sandboxing

MITRE ATT&CK reference →
Phishing T1566 Initial Access

Adversaries may send phishing messages to gain access to victim systems. All forms of phishing are electronically delivered social engineering. Phishing can be targeted, known as spearphishing. In spearphishing, a specific individual, company, or industry will be targeted by the adversary. More generally, adversaries can conduct non-targeted phishing, such as in mass malware spam campaigns. Adversaries may send victims emails containing malicious attachments or links, typically to execute malicious code on victim systems. Phishing may also be conducted via third-party services, like social media platforms.

Mitigations: Network Intrusion Prevention, Restrict Web-Based Content, User Training, Antivirus/Antimalware, Software Configuration, Audit

MITRE ATT&CK reference →

MITRE ATT&CK techniques attributed to Qilin across its recorded activity, not a finding about how ACR1.COM Commercial Roofing was reached.

Vulnerabilities Qilin is recorded exploiting

5 of these 6 are in the CISA Known Exploited Vulnerabilities catalog, 3 of them recorded by CISA as used in ransomware campaigns. CVEs attributed to Qilin across its reported activity. There is no indication that any of these was involved in the ACR1.COM Commercial Roofing incident — the source data does not record an entry point.

Incident Analysis

ACR1.COM Commercial Roofing was targeted by Qilin ransomware, one of the most active ransomware groups in our database with 2,259 confirmed victims globally. The attack was disclosed on March 27, 2026, when ACR1.COM Commercial Roofing appeared on the group's dark web leak site.

ACR1.COM Commercial Roofing is based in United States , operating in the Construction sector. United States ranks #1 globally for ransomware attacks, with 9,508 victims in our 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.

Qilin typically employs a double extortion model: first exfiltrating sensitive data from the victim's systems, then deploying ransomware to encrypt files. Victims face two simultaneous threats — paying to restore access and paying to prevent publication of stolen data. The group's leak site publishes victim names and exfiltrated data as leverage.

Data source: This incident record is sourced from public ransomware group leak site disclosures aggregated via the ransomware.live API. Disclosure date reflects when the victim was published on the leak site, which may differ from the initial date of compromise. This platform does not publish or link to stolen data. Last data update: Sep 16, 2026 00:00 UTC.

Frequently Asked Questions

Was ACR1.COM Commercial Roofing attacked by ransomware?

Yes. ACR1.COM Commercial Roofing was listed as a victim of the Qilin ransomware group on March 27, 2026. The organisation is based in United States and operates in the Construction sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked ACR1.COM Commercial Roofing?

ACR1.COM Commercial Roofing was attacked by Qilin ransomware. Qilin is one of the most active ransomware groups, having claimed 2,259 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the ACR1.COM Commercial Roofing ransomware attack occur?

The ransomware attack on ACR1.COM Commercial Roofing was disclosed on March 27, 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 ACR1.COM Commercial Roofing ransomware attack?

The specific data stolen from ACR1.COM Commercial Roofing 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, ACR1.COM Commercial Roofing likely held sensitive business data, client information, and operational records.

How can organisations protect against Qilin attacks?

To defend against Qilin 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.