Cyber Threat Intelligence
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Ransomware Victim Financial Services

John W. Brooker & Co., CPAs

Ransomware attack by Cicada3301 Β· Disclosed August 31, 2024 Β· πŸ‡ΊπŸ‡Έ United States

brooker-cpa.com

Date Disclosed
Aug 31, 2024
2024
Threat Group
Cicada3301
75 total victims
Country
πŸ‡ΊπŸ‡Έ United States
Industry
Financial Services

ThreatAI Analysis

Compiled from this incident record and the threat intelligence profile for Cicada3301. Figures and technique mappings are quoted from the source data, not inferred.

About the Cicada3301 group

Cicada3301 is a ransomware-as-a-service group (tracked as Repellent Scorpius by Palo Alto) that emerged in mid-2024 using Rust-based ransomware targeting Windows, Linux, and ESXi systems, suspected to be a successor of BlackCat/ALPHV and running an affiliate program with 20% commissions. Cicada3301 has listed 75 victims since June 2024.

Incident Analysis

John W. Brooker & Co., CPAs was targeted by Cicada3301 ransomware, one of the most active ransomware groups in our database with 75 confirmed victims globally. The attack was disclosed on August 31, 2024, when John W. Brooker & Co., CPAs appeared on the group's dark web leak site.

John W. Brooker & Co., CPAs is based in United States , operating in the Financial Services sector. United States ranks #1 globally for ransomware attacks, with 9,450 victims in our database.

Sector context: Financial sector organisations are targeted for their access to funds, sensitive financial data, and the reputational damage a public breach can cause. Regulatory requirements also increase recovery costs.

Cicada3301 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 β€” 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 9, 2026 10:00 UTC.

Frequently Asked Questions

Was John W. Brooker & Co., CPAs attacked by ransomware?

Yes. John W. Brooker & Co., CPAs was listed as a victim of the Cicada3301 ransomware group on August 31, 2024. The organisation is based in United States and operates in the Financial Services sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked John W. Brooker & Co., CPAs?

John W. Brooker & Co., CPAs was attacked by Cicada3301 ransomware. Cicada3301 is one of the most active ransomware groups, having claimed 75 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the John W. Brooker & Co., CPAs ransomware attack occur?

The ransomware attack on John W. Brooker & Co., CPAs was disclosed on August 31, 2024. 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 John W. Brooker & Co., CPAs ransomware attack?

The specific data stolen from John W. Brooker & Co., CPAs 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 Financial Services organisation, John W. Brooker & Co., CPAs likely held financial records, client data, and transaction histories.

How can organisations protect against Cicada3301 attacks?

To defend against Cicada3301 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.