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Ransomware Victim Business Services

Anderson & Karrenberg

Ransomware attack by Interlock · Disclosed July 18, 2025 · 🇺🇸 United States

aklawfirm.com

Date Disclosed
Jul 18, 2025
2025
Threat Group
Interlock
125 total victims
Country
🇺🇸 United States
Industry
Business Services

ThreatAI Analysis

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

About the Interlock group

Interlock is a ransomware group first observed in September 2024 that targets critical infrastructure sectors including healthcare, government, education, and technology across North America and Europe using double-extortion, with 57+ claimed victims including a major US dialysis provider exposing over two million patient records. Interlock has listed 119 victims since December 2023.

Incident Analysis

Anderson & Karrenberg was targeted by Interlock ransomware, one of the most active ransomware groups in our database with 125 confirmed victims globally. The attack was disclosed on July 18, 2025, when Anderson & Karrenberg appeared on the group's dark web leak site.

Anderson & Karrenberg is based in United States , operating in the Business Services sector. United States ranks #1 globally for ransomware attacks, with 9,416 victims in our database.

Sector context: Business services firms often have access to multiple client environments, making them high-value pivot points for ransomware operators seeking to maximise impact across multiple victim organisations.

Interlock 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 5, 2026 18:00 UTC.

Frequently Asked Questions

Was Anderson & Karrenberg attacked by ransomware?

Yes. Anderson & Karrenberg was listed as a victim of the Interlock ransomware group on July 18, 2025. The organisation is based in United States and operates in the Business Services sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked Anderson & Karrenberg?

Anderson & Karrenberg was attacked by Interlock ransomware. Interlock is one of the most active ransomware groups, having claimed 125 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the Anderson & Karrenberg ransomware attack occur?

The ransomware attack on Anderson & Karrenberg was disclosed on July 18, 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 Anderson & Karrenberg ransomware attack?

The specific data stolen from Anderson & Karrenberg 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 Business Services organisation, Anderson & Karrenberg likely held sensitive business data, client information, and operational records.

How can organisations protect against Interlock attacks?

To defend against Interlock 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.