Kyber Ransomware
TrackedThreat actor group tracked in the global ransomware database · Last disclosure: Jul 30, 2026
ThreatAI Analysis
Compiled from the ransomware.live profile for Kyber and from this database. Figures and technique mappings are quoted from the source data, not inferred.
Who Kyber is
Kyber is a recently identified ransomware group using sophisticated hybrid encryption (AES-256-CTR with X25519 and Kyber1024), operating Tor-based communication channels and employing double-extortion with free partial decryption offered to build negotiation trust, discovered through underground forum monitoring in 2025.
Recorded activity
Disclosures attributed to Kyber in this database run from July 2026 to July 2026, totalling 1 victims — 0% of everything tracked here. Kyber has listed victims in 1 countries in this database, most often United States. The sectors appearing most in its listings are Government & Defense.
YARA detection rules
kyber.yar
/*
kyber ransomware
*/
rule kyber_Ransomnote
{
meta:
author = "ransomware.live"
family = "ransomware.kyber"
description = "Detects kyber ransomware ransom note or artifact"
date = "2026-05-04"
severity = 7
score = 70
strings:
$name1 = "kyber" ascii nocase
$name2 = "KYBER" ascii
$onion = "kyber.onion" ascii nocase
condition:
any of them
}Community-contributed rules for Kyber, reproduced as published. Test them against your own corpus before relying on them: rule quality and false-positive behaviour vary by author.
Threat Actor Analysis
Kyber is a ransomware threat group that has disclosed 1 victims in publicly accessible leak site data, representing 0% of all ransomware attacks tracked in this database. The earliest victim disclosure attributed to Kyber in our dataset dates to July 2026.
Geographically, Kyber has targeted organisations in 1 countries. The most frequently targeted nation is United States with 1 victim organisations.
Industry-wise, Kyber shows a concentration in the Government & Defense sector. These industries are frequently targeted because they manage sensitive data, critical operations, or have lower tolerance for operational downtime — conditions that increase ransom payment likelihood.
Like most modern ransomware operations, Kyber likely employs a double extortion model: encrypting victim files while simultaneously exfiltrating data, creating dual pressure to pay the ransom. Victim organisations that refuse payment face having their data published on the group's dark web leak site.
Note: This profile is generated from public leak site disclosures aggregated via the ransomware.live API. Data is updated automatically. The table below lists the 1 most recent of the 1 disclosures we hold for this group; use the link beneath it to page through all of them.
Recent Victim Disclosures (showing 1 of 1)
| # | Organization | Country | Sector | Date |
|---|---|---|---|---|
| 1 | L3HARRIS l3harris.com | 🇺🇸 United States | Government & Defense | Jul 30, 2026 |
Frequently Asked Questions
What is Kyber ransomware?
Kyber is a ransomware threat group that has claimed 1 victims since its first known activity in July 2026. The group operates by infiltrating target networks, exfiltrating data, encrypting files, and threatening to publish stolen data on a dark web leak site if the ransom is not paid.
How many victims has Kyber attacked?
Kyber has claimed 1 victims in our database, representing 0% of all tracked ransomware attacks. The most targeted countries are United States.
Which countries does Kyber target?
Kyber has attacked organizations in 1 countries. The top targeted countries are: United States.
Which industries does Kyber target?
Kyber most frequently targets the Government & Defense sectors based on victim disclosures in our database.
Is Kyber still active?
Kyber's most recent victim disclosure in our database was on July 30, 2026. Ransomware groups frequently rebrand or go dormant; monitor this page and our ransomware map for the latest activity.