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Ransomware group

D4rk4rmy ransomware

18 victims listed on the D4rk4rmy leak site across 12 countries. Most recent disclosure .

Victims
18
0.1% of all tracked
Countries
12
Most: United States
Sectors
8
Most: Financial Services
First seen
Jul 2025
In this database

ThreatAI analysis

Compiled from the ransomware.live profile for D4rk4rmy and from this database. Figures and technique mappings are quoted from the source data, not inferred.

Who D4rk4rmy is

D4rk4rmy is a ransomware and data extortion group active since at least 2025, targeting financial services, hospitality, technology, and logistics sectors, operating a RaaS model with notable claimed victims including the Monte Carlo casino resort.

Recorded activity

Disclosures attributed to D4rk4rmy in this database run from July 2025 to August 2025, totalling 18 victims — 0.1% of everything tracked here. D4rk4rmy has listed victims in 12 countries in this database, most often United States, followed by Taiwan and Brazil. The sectors appearing most in its listings are Financial Services, Business Services, Technology.

YARA detection rules

d4rk4rmy.yar 
/*
d4rk4rmy ransomware
*/

rule d4rk4rmy_Ransomnote
{
    meta:
        author = "ransomware.live"
        family = "ransomware.d4rk4rmy"
        description = "Detects d4rk4rmy ransomware ransom note or artifact"
        date = "2026-05-04"
        severity = 7
        score = 70

    strings:
        $name1 = "d4rk4rmy" ascii nocase
        $name2 = "D4RK4RMY" ascii
        $onion  = "d4rk4rmy.onion" ascii nocase

    condition:
        any of them
}

Community-contributed rules for D4rk4rmy, 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

D4rk4rmy has disclosed 18 victims on its leak site, 0.1% of all ransomware listings tracked in this database. Its earliest disclosure here dates to July 2025.

The group has listed organisations in 12 countries, most often in United States (5 victims), followed by Taiwan, Brazil, United Kingdom.

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

Like most current ransomware operations, D4rk4rmy 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.

D4rk4rmy victims 18

Organization Disclosed
THE MILLENNIUM GROUP
USUnited States
VINSON & ELKINS LLP
USUnited States
MMA TRANSFERS
GBUnited Kingdom
BRIDGEWATER ASSOCIATES
USUnited States
MAGELLAN FINANCIAL GROUP
AUAustralia
MIZUHA FINANCIAL GROUP
JPJapan
ONEX CANADA ASSET MANAGEMENT INC
CACanada
TSAI CAPITAL
USUnited States
BIG ROCK RESORT
USUnited States
CASINO DE MONTE-CARLO
MCMonaco
DIMERCO
TWTaiwan
Digitall Evolution
BRBrazil
VINHAS E REDENSCHI ADVOGADOS
BRBrazil
BIG SILVER
THThailand
MAFATE BUSINESS ENTERPRISE
ZASouth Africa
University of Puerto RicoRío Piedras Campus
PRPuerto Rico
ELZAB
PLPoland
Taiwan Digital Streaming Co Ltd
TWTaiwan

Frequently asked questions

What is D4rk4rmy ransomware?

D4rk4rmy is a ransomware threat group that has claimed 18 victims since its first known activity in July 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 D4rk4rmy attacked?

D4rk4rmy has claimed 18 victims in our database, representing 0.1% of all tracked ransomware attacks. The most targeted countries are United States, Taiwan, Brazil, United Kingdom.

Which countries does D4rk4rmy target?

D4rk4rmy has attacked organizations in 12 countries. The top targeted countries are: United States, Taiwan, Brazil, United Kingdom.

Which industries does D4rk4rmy target?

D4rk4rmy most frequently targets the Financial Services, Business Services, Technology sectors based on victim disclosures in our database.

Is D4rk4rmy still active?

D4rk4rmy's most recent victim disclosure in our database was on August 16, 2025. Ransomware groups frequently rebrand or go dormant; monitor this page and our ransomware map for the latest activity.