Flocker
Since May 3, 2024, Flocker has listed 59 organizations on its leak site.
Listings per month
- Total listings
- 59
- First listing
- May 3, 2024
- Latest listing
- Jul 31, 2025
- MITRE ATT&CK techniques
- 0
Flocker (also linked to the FSociety brand) is a ransomware-as-a-service group active since 2023–2024, targeting Windows and Linux systems via phishing, compromised RDP, and exploit kits using a double extortion model, and observed collaborating with FunkSec.
It posted no listings in the last 12 months.
Most targeted country: United States, with 6 listings (10% of the total).
Most targeted sector: Technology, with 14 listings (24% of the total).
Targeted countries
Showing 10 of 59 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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