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Cyber Threat
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Ransomware group

Kyber ransomware

1 victims listed on the Kyber leak site across 1 countries. Most recent disclosure .

Victims
1
0% of all tracked
Countries
1
Most: United States
Sectors
1
Most: Government & Defense
First seen
Jul 2026
In this database

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 has disclosed 1 victims on its leak site, 0% of all ransomware listings tracked in this database. Its earliest disclosure here dates to July 2026.

The group has listed organisations in 1 countries, most often in United States (1 victims).

By industry, its listings concentrate in Government & Defense — sectors that hold sensitive data or cannot tolerate long outages, both of which raise the pressure to pay.

Like most current ransomware operations, Kyber is likely to use double extortion: data is stolen before files are encrypted, and organisations that refuse to pay are named on the leak site with the stolen data as leverage.

Generated from public leak-site disclosures aggregated via the ransomware.live API and updated automatically.

Kyber victims 1

Organization Disclosed
L3HARRIS
USUnited States

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.