Black X
Since Jun 2, 2026, Black X has listed 17 organizations on its leak site.
Listings per month
- Total listings
- 17
- First listing
- Jun 2, 2026
- Latest listing
- Oct 9, 2026
- MITRE ATT&CK techniques
- 0
Black X is classified as ransomware group.
It posted 17 listings in the last 12 months; the busiest month was October 2026 (6 listings).
Most targeted country: South Korea, with 4 listings (24% of the total).
Most targeted sector: Healthcare, with 4 listings (24% of the total).
Targeted countries
Showing 10 of 17 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.
Is your organization mentioned?
Search with your domain to check whether your organization appears in ransomware listings, leaked records, forums and Telegram channels.
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Customer intelligence on top of Infostealer Detection: leaked accounts of end users who sign in to your site.