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Ransomware group

Tridentlocker ransomware

18 victims listed on the Tridentlocker leak site across 7 countries. Most recent disclosure .

Victims
18
0.1% of all tracked
Countries
7
Most: United States
Sectors
6
Most: Technology
First seen
Nov 2025
In this database

ThreatAI analysis

Compiled from the ransomware.live profile for Tridentlocker and from this database. Figures and technique mappings are quoted from the source data, not inferred.

Tridentlocker is a ransomware operation responsible for infecting 18 organizations across at least seven countries, targeting sectors like technology and business services worldwide.

Who Tridentlocker is

TridentLocker is a newly emerged ransomware group (surfaced mid-2025) targeting organizations managing high volumes of regulated or third-party data — including government services, telecom, and engineering firms — across the US, Canada, UK, and Asia using double-extortion tactics.

Recorded activity

Disclosures attributed to Tridentlocker in this database run from November 2025 to September 2026, totalling 18 victims — 0.1% of everything tracked here. Tridentlocker has listed victims in 7 countries in this database, most often United States, followed by United Kingdom and Canada. The sectors appearing most in its listings are Technology, Business Services, Energy.

YARA detection rules

tridentlocker.yar 
/*
tridentlocker ransomware
*/

rule tridentlocker_Ransomnote
{
    meta:
        author = "ransomware.live"
        family = "ransomware.tridentlocker"
        description = "Detects tridentlocker ransomware ransom note or artifact"
        date = "2026-05-04"
        severity = 7
        score = 70

    strings:
        $name1 = "tridentlocker" ascii nocase
        $name2 = "TRIDENTLOCKER" ascii
        $onion  = "tridentlocker.onion" ascii nocase

    condition:
        any of them
}

Community-contributed rules for Tridentlocker, 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

Tridentlocker has disclosed 18 victims on its leak site, 0.1% of all ransomware listings tracked in this database. Its earliest disclosure here dates to November 2025.

The group has listed organisations in 7 countries, most often in United States (7 victims), followed by United Kingdom, Canada, South Korea.

By industry, its listings concentrate in Technology, Business Services, Energy — sectors that hold sensitive data or cannot tolerate long outages, both of which raise the pressure to pay.

Like most current ransomware operations, Tridentlocker 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.

Tridentlocker victims 18

Organization Disclosed
SouthernCarlson
SouthernCarlson
RT Software
GBUnited Kingdom
Jameson Pepple Cantu PLLC
USUnited States
TMPartner
JPJapan
Eco Green Group
GBUnited Kingdom
Sedgwick Government Solutions
USUnited States
allenprinting
USUnited States
noment
USUnited States
bpost
BEBelgium
Advantage 360
USUnited States
asiawba
KRSouth Korea
Calmec
CACanada
EnQuest
GBUnited Kingdom
GuestTek
CACanada
iqs
IQIraq
LMG Holdings
USUnited States
typecaseinc
USUnited States

Frequently asked questions

What is Tridentlocker ransomware?

Tridentlocker is a ransomware threat group that has claimed 18 victims since its first known activity in November 2025. 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 Tridentlocker attacked?

Tridentlocker has claimed 18 victims in our database, representing 0.1% of all tracked ransomware attacks. The most targeted countries are United States, United Kingdom, Canada, South Korea.

Which countries does Tridentlocker target?

Tridentlocker has attacked organizations in 7 countries. The top targeted countries are: United States, United Kingdom, Canada, South Korea.

Which industries does Tridentlocker target?

Tridentlocker most frequently targets the Technology, Business Services, Energy sectors based on victim disclosures in our database.

Is Tridentlocker still active?

Tridentlocker's most recent victim disclosure in our database was on September 4, 2026. Ransomware groups frequently rebrand or go dormant; monitor this page and our ransomware map for the latest activity.