Colares Linhares
8baseThis record tracks a ransomware attack claimed by the 8base group against Colares Linhares. 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
Colares Linhares is a civil engineering and infrastructure construction company based in Rio de Janeiro, Brazil, with 25 years of operations across five states and over 200 delivered projects. The firm specializes in road construction, paving, urban sanitation, sewer systems, and related infrastructure activities, serving sectors including construction and real estate. With a presence in Jacarepaguá, Rio de Janeiro, and operations extending to Contagem, Minas Gerais, the company has engaged more than 10,000 professionals in building highways, treatment stations, and structural projects. Colares Linhares was listed as a ransomware victim associated with the 8base threat actor.
Leak Screenshots
SAMPLEProof-of-breach screenshots the operator posted from the stolen data. Previews are redacted and locked — the originals are available on HaveIBeenRansom.