Kosmos
About the organisation
***.de zoominfo.com/c/kosmos/470278755 Franckh-Kosmos Verlags-GmbH & Co. KG, a prominent media publishing house based in Stuttgart, Germany.Founded in 1822 by Johann Friedrich Franckh, the company is one of the leading publishers of guidebooks, children's books, board games, and educational experiment kits.It successfully combines long-standing tradition with modern trends to offer engaging products for children, families, and hobbyists
What the listing means
Kosmos appeared on the thegentlemen leak site on 07 July 2026. Groups publish a victim once negotiations stall or as pressure during them, so a listing usually means data was already exfiltrated — the attack itself is dated 06 July 2026, 1 day before the listing. This group has published 134 claims in the last 30 days and remains active.
Recommended actions
- Treat any unsolicited message referencing Kosmos as suspicious — leaked data gets weaponised for phishing within days.
- If you hold an account on kosmos.de, change that password now, update it anywhere you reused it, and enable two-factor authentication.
- Other Energy 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/S29zbW9zQHRoZWdlbnRsZW1lbg==