Cyber Threat Intelligence
DE
Ransomware Victim Technology

Delta Information Systems

Ransomware attack by Cephalus · Disclosed August 29, 2025 · 🇺🇸 United States

acroamatics.com

Date Disclosed
Aug 29, 2025
2025
Threat Group
Cephalus
19 total victims
Country
🇺🇸 United States
Industry
Technology

Incident Analysis

Delta Information Systems was targeted by Cephalus ransomware, one of the most active ransomware groups in our database with 19 confirmed victims globally. The attack was disclosed on August 29, 2025, when Delta Information Systems appeared on the group's dark web leak site.

Delta Information Systems is based in United States , operating in the Technology sector. United States ranks #1 globally for ransomware attacks, with 8,273 victims in our database.

Sector context: Technology companies hold intellectual property, customer data, and source code — all highly valuable assets. A successful ransomware attack can also put downstream customers at risk through supply chain exposure.

Cephalus 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: May 14, 2026 18:01 UTC.

Frequently Asked Questions

Was Delta Information Systems attacked by ransomware?

Yes. Delta Information Systems was listed as a victim of the Cephalus ransomware group on August 29, 2025. The organisation is based in United States and operates in the Technology sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked Delta Information Systems?

Delta Information Systems was attacked by Cephalus ransomware. Cephalus is one of the most active ransomware groups, having claimed 19 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the Delta Information Systems ransomware attack occur?

The ransomware attack on Delta Information Systems was disclosed on August 29, 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 Delta Information Systems ransomware attack?

The specific data stolen from Delta Information Systems 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 Technology organisation, Delta Information Systems likely held source code, intellectual property, and customer data.

How can organisations protect against Cephalus attacks?

To defend against Cephalus 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.