Cephalus Ransomware

Cephalus is a ransomware threat group that has disclosed 19 victims in publicly accessible leak site data, representing 0.1% of all ransomware attacks tracked in this database. The earliest victim disclosure attributed to Cephalus in our dataset dates to August 2025.

Geographically, Cephalus has targeted organisations in 5 countries. The most frequently targeted nation is United States with 13 victim organisations. Other heavily targeted nations include United Kingdom, Japan, Netherlands.

Industry-wise, Cephalus shows a concentration in the Business Services, Healthcare, Technology sectors. These industries are frequently targeted because they manage sensitive data, critical operations, or have lower tolerance for operational downtime — conditions that increase ransom payment likelihood.

Like most modern ransomware operations, Cephalus likely employs a double extortion model: encrypting victim files while simultaneously exfiltrating data, creating dual pressure to pay the ransom. Victim organisations that refuse payment face having their data published on the group's dark web leak site.

Note: This profile is generated from public leak site disclosures aggregated via the ransomware.live API. Data is updated automatically. The table below lists the 19 most recent of the 19 disclosures we hold for this group; use the link beneath it to page through all of them.