Celeris Networks
sinobi listed this organization on its leak site on May 5, 2026.
- Listing date
- May 5, 2026
- Attack date
- May 5, 2026
Listing text
Celeris Networks is a business IT support provider based in Knoxville, specializing in managed IT services, cybersecurity solutions, and cloud managed services. The firm serves various industries, including accounting, distribution, legal services, nonprofits, and professional services. Composed of expert technology specialists, Celeris Networks aims to alleviate IT challenges and help local businesses maximize productivity. With a commitment to personalized service, they ensure that clients receive dedicated support tailored to their needs.
About the group
sinobi posted its first listing on Jul 5, 2025 and has listed 274 organizations to date.
Sinobi is a private vetted-affiliate RaaS group that emerged in mid-2025, believed to be a rebrand of the Lynx/INC ransomware lineage, claiming 176 victims by end of 2025 through double-extortion attacks primarily against mid-market US organizations via compromised SonicWall VPN credentials.
Learning center
What does this listing mean?
Ransomware groups move data out of the organization before encrypting systems and threaten to publish it if the ransom is not paid. This method is called double extortion.
The listing shows that the group claims to have targeted the organization. Whether the data was published is shown by the later status of the listing.
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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