MCV Holding Company LLC
quantumThis record tracks a ransomware attack claimed by the quantum group against MCV Holding Company LLC. 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
MCV Holding Company LLC is a U.S.-based holding company in the services sector that owns Midland Cogeneration Venture, a natural gas combined-cycle cogeneration facility in Midland, Michigan. The plant has supplied electricity and capacity to Consumers Energy and other industrial customers, making MCV Holding part of the region’s power infrastructure. Public corporate disclosures describe the asset as a 1,633 MW facility acquired in 2022. It was listed as a ransomware victim associated with quantum.
Leak Screenshots
SAMPLEProof-of-breach screenshots the operator posted from the stolen data. Previews are redacted and locked — the originals are available on HaveIBeenRansom.