Shelbourne Accountants
cephalus-apiThis record tracks a ransomware attack claimed by the cephalus-api group against Shelbourne Accountants. It collects the publicly disclosed attack details — sector, location and timeline — as published on the operator's leak site and indexed by Breach House.
Window Zero
EXPOSURE GAPWindow Zero is the time the breach stayed in the open before anyone said so — the gap between when the attack was first discovered on the operator's leak site (t1) and when it was publicly disclosed (t2). The wider this window, the longer victims, staff and customers were exposed with no warning.
Attack Summary
shelbourneaccountants.ie is the website of Shelbourne Accountants, an Irish accountancy firm based in Dublin that provides financial and taxation services. Its site states that it serves companies of all sizes and personal clients, with offerings including bookkeeping, payroll, company formation, registered office support, and contractor services. The firm presents itself as a provider of accounting and tax support for businesses and individuals in Ireland. The domain was listed as a ransomware victim associated with cephalus-api.
Leak Screenshots
SAMPLEProof-of-breach screenshots the operator posted from the stolen data. Previews are redacted and locked — the originals are available on HaveIBeenRansom.