kisnet.co.jp
About the organisation
[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.
What the listing means
kisnet.co.jp appeared on the BrainCipher leak site on 01 May 2026. Groups publish a victim once negotiations stall or as pressure during them, so a listing usually means data was already exfiltrated. This group has published 7 claims in the last 30 days and remains active.
Recommended actions
- Treat any unsolicited message referencing kisnet.co.jp as suspicious — leaked data gets weaponised for phishing within days.
- If you hold an account on kisnet.co.jp, change that password now, update it anywhere you reused it, and enable two-factor authentication.
- Other Telecommunication organisations should review this group's known TTPs and validate detection coverage against them.
- Watch for follow-on extortion: stolen data is often re-leaked or resold after the initial listing.
- A leak-site listing is a claim made by the attacker, not a confirmed breach — check the organisation's own disclosures before acting on it.
Leak-site evidence
Listing URL https://www.ransomware.live/id/a2lzbmV0LmNvLmpwQEJyYWluQ2lwaGVy
Show leak-site screenshot
Captured from the group's extortion site. It may contain the victim's data or the attacker's messaging.
