kisnet.co.jp
BrainCipherThis record tracks a ransomware attack claimed by the BrainCipher group against kisnet.co.jp. 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
[AI generated] Kisnet Co., Ltd. is a Japanese internet service provider based in Japan. The company offers broadband and network connectivity services primarily to residential and business customers. Operating within the telecommunications and ISP industry, Kisnet provides internet access solutions in the Japanese market. The company is part of Japan's regional ISP sector, delivering reliable network infrastructure and related services to its subscriber base.
Leak Screenshots
SAMPLEProof-of-breach screenshots the operator posted from the stolen data. Previews are redacted and locked — the originals are available on HaveIBeenRansom.