Cloak
Since Aug 24, 2023, Cloak has listed 170 organizations on its leak site.
Listings per month
- Total listings
- 170
- First listing
- Aug 24, 2023
- Latest listing
- Oct 18, 2026
- MITRE ATT&CK techniques
- 0
Cloak is a ransomware-as-a-service operation active since late 2022, primarily targeting small-to-medium enterprises in Europe — especially Germany — across manufacturing, healthcare, education, and government sectors, with expansion into North American and Asian targets by 2025.
It posted 15 listings in the last 12 months; the busiest month was February 2026 (4 listings).
Most targeted country: United States, with 42 listings (25% of the total).
Most targeted sector: Professional Services, with 33 listings (19% of the total).
Targeted countries
Showing 10 of 170 results
What does a ransomware group do?
Ransomware groups break into corporate networks, move data out and encrypt systems. If the ransom is not paid, they list the organization on a leak site and threaten to publish the data.
What should you do if your organization is listed on a leak site?
- Record the listing and any published sample files; do not visit the leak site from the corporate network.
- Isolate affected systems and preserve logs without deleting them.
- Determine which data left the organization; if personal data is involved, review notification obligations with your legal team.
- Make any decision about the ransom demand together with legal, management and incident response.
- Do not bring systems back online before the attacker’s entry point is closed.
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