Osiris
Since Dec 18, 2025, Osiris has listed 2 organizations on its leak site.
Listings per month
- Total listings
- 2
- First listing
- Dec 18, 2025
- Latest listing
- Jan 9, 2026
- MITRE ATT&CK techniques
- 0
Osiris is a ransomware-as-a-service operation first observed in November 2025 that uses a Bring Your Own Vulnerable Driver (BYOVD) technique to disable endpoint detection tools before deploying hybrid ECC + AES-128-CTR encryption; Symantec researchers linked its operators to former INC ransomware affiliates.
It posted 2 listings in the last 12 months; the busiest month was December 2025 (1 listings).
Most targeted country: Philippines, with 1 listings (50% of the total).
Most targeted sector: Manufacturing, with 1 listings (50% of the total).
Targeted countries
Targeted sectors
Showing 2 of 2 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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