Victim Claim
Gerald Zisser GmbH
Claimed by
krybit
Listed on leak site
08 Apr 2026
Reported attack date
08 Apr 2026
Group claims tracked
80
Unverified claim.
This entry reproduces a listing published by the krybit group on its own extortion site.
Attackers routinely exaggerate or fabricate victims. Nothing here confirms that
Gerald Zisser GmbH suffered a breach, or what data was actually taken.
About the organisation
Gerald Zisser GmbH is a private Austrian company specializing in building technical services, focusing on plumbing, heat...
What the listing means
Gerald Zisser GmbH appeared on the krybit leak site on 08 April 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 25 claims in the last 30 days and remains active.
Recommended actions
- Treat any unsolicited message referencing Gerald Zisser GmbH as suspicious — leaked data gets weaponised for phishing within days.
- If you hold an account on Gerald Zisser GmbH, change that password now, update it anywhere you reused it, and enable two-factor authentication.
- Other Business Services 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/R2VyYWxkIFppc3NlciBHbWJIQGtyeWJpdA==
Show leak-site screenshot
Captured from the group's extortion site. It may contain the victim's data or the attacker's messaging.
