Victim Claim
Mairie Thiverval Grignon
Claimed by
medusalocker
Listed on leak site
01 Jul 2026
Reported attack date
01 Jul 2026
Group claims tracked
26
Unverified claim.
This entry reproduces a listing published by the medusalocker group on its own extortion site.
Attackers routinely exaggerate or fabricate victims. Nothing here confirms that
Mairie Thiverval Grignon suffered a breach, or what data was actually taken.
About the organisation
Organization with 162 emails extracted. Domain: mairie-thiverval-grignon.fr
What the listing means
Mairie Thiverval Grignon appeared on the medusalocker leak site on 01 July 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 11 claims in the last 30 days and remains active.
Recommended actions
- Treat any unsolicited message referencing Mairie Thiverval Grignon as suspicious β leaked data gets weaponised for phishing within days.
- If you hold an account on mairie-thiverval-grignon.fr, change that password now, update it anywhere you reused it, and enable two-factor authentication.
- Other Public Sector 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 β check the organisation's own disclosures before acting on it.
Leak-site evidence
Listing URL https://www.ransomware.live/id/TWFpcmllIFRoaXZlcnZhbCBHcmlnbm9uQG1lZHVzYWxvY2tlcg==
Show leak-site screenshot
Captured from the group's extortion site. It may contain the victim's data or the attacker's messaging.
