Disclosure context

About Killsecurity

Killsecurity is a relatively new ransomware group that emerged in March 2024, operating with apparent financial motivations and demonstrating rapid expansion in their victim targeting. The group's origin and affiliations remain unclear due to limited public documentation from major threat intelligence sources, though their global targeting pattern suggests a sophisticated operation. Based on available victim data, Killsecurity has compromised 276 organizations primarily across the United States, India, United Kingdom, Brazil, and Belgium, with a particular focus on healthcare, technology, business services, and financial sectors. The group's attack methodology, encryption techniques, and specific tools remain undocumented in public threat intelligence reports from established security firms. Notable campaigns and high-profile victims have not been extensively documented by major cybersecurity organizations or law enforcement agencies, likely due to the group's recent emergence. Killsecurity appears to remain active as of current reporting, though comprehensive analysis of their operations is limited by the lack of detailed technical documentation from reputable threat intelligence sources. The group has been linked to 277 public disclosures across our corpus. First observed on a leak site on March 21, 2024; most recent post May 15, 2026. The operation is currently active.

Timeline of this disclosure

December 24, 2025grade results listed by Killsecurityon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Education sector, which has 694 disclosures indexed across all operators we track. Geographically, grade results is reported in United States, a country with 7,392 ransomware disclosures in our corpus.

How we know this. Darkfield monitors public ransomware leak sites continuously, archiving every new disclosure and the data later released against the victim. Each entry on this page is sourced from the operator's own publication and cross-checked against complementary OSINT feeds (RansomLook, ransomware.live, RansomWatch). We do not collect or host stolen data — only the metadata, timestamps and screenshots needed to make the public disclosure searchable and accountable. Records here are corrected when the original post is edited, retracted, or merged with another disclosure.

Ransomware victim disclosure

← All victims

grade results

Claimed by Killsecurity · listed 5 months ago

Age

since listed · data leaked

Status timeline

Listed
Dec 24, 2025
Data leaked

At a glance

Group: Killsecurity
Status: Data leaked
Country: United States
Sector: Education
Listed on leak site: Dec 24, 2025

About the victim

AI dossier — public-source company profile

Grade Results is a U.S.-based education technology company providing an Assessment Management System for K-12 school districts. Their platform covers benchmark assessments, curriculum and course management, student information systems (SIS), adaptive and third-party assessments, virtual classrooms, and performance dashboards. They serve districts seeking data-driven instruction across core and elective subjects for grades K-12.

Industry: K-12 Education Technology & Assessment Management

Attack summary

Severity: critical — Grade Results handles sensitive student PII at scale, including minors' academic records, IEP/ILP data, transcripts, and performance dashboards for K-12 districts. Data publication by the threat actor involving a platform processing regulated student data (FERPA-covered) at district scale constitutes a critical disclosure.

Killsecurity claims to have compromised Grade Results and has published data (disclosed status: data_published), though the leak post itself contains minimal detail and no stated ransom or explicit data size. The post indicates at least one disclosure tranche.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Student performance data
Student information records (SIS)
Curriculum and course materials
Attendance and gradebook records
IEP/ILP learning goal data
Report cards and transcripts
User account information
Assessment results

What the group claims

Price ??? Disclosures 0/1

Sources

Victim sitegraderesults.com

Source

Indexed 5 months ago

This page surfaces a public ransomware disclosure indexed by Darkfield. Original posts come from the operator's own leak site; we cross-check against ransomware.live, RansomLook and RansomWatch where applicable. Share this URL freely.