Bert Ransomware
TrackedThreat actor group tracked in the global ransomware database · Last disclosure: Jun 10, 2025
ThreatAI Analysis
Compiled from the ransomware.live profile for Bert and from this database. Figures and technique mappings are quoted from the source data, not inferred.
Who Bert is
BERT is a newly emerged ransomware group first identified in mid-2025, targeting Windows and Linux platforms across healthcare, technology, and event services sectors in Asia, Europe, and the US, with ransomware derived from a Linux variant of REvil using AES encryption and multi-threaded file locking.
Recorded activity
Disclosures attributed to Bert in this database run from April 2025 to June 2025, totalling 7 victims — 0% of everything tracked here. Bert has listed victims in 6 countries in this database, most often United States, followed by United Kingdom and Colombia. The sectors appearing most in its listings are Technology, Transportation/Logistics, Construction.
Indicators of compromise
- 71dc9540eb03f2ed4d1b6496b13fe839
- 00fdc504be1788231aa7b7d2d1335893
- d1013bbaa2f151195d563b2b65126fa3
- 3e581aad42a2a9e080a4a676de42f015
- edec051ce461d62fbbd3abf09534b731
- 5cab4fabffeb5903f684c936a90e0b46
- 185.100.157.74
- 169.254.169.254
Showing a sample of 9 MD5, 2 IP on file. Hashes and network indicators published for Bert. Leak-site addresses are deliberately excluded. Indicators age quickly — treat a match as a starting point for investigation, and an absence of matches as no assurance.
YARA detection rules
bert.yar
/*
bert ransomware
*/
rule bert_Ransomnote
{
meta:
author = "ransomware.live"
family = "ransomware.bert"
description = "Detects bert ransomware ransom note or artifact"
date = "2026-05-04"
severity = 7
score = 70
strings:
$name1 = "bert" ascii nocase
$name2 = "BERT" ascii
$onion = "bert.onion" ascii nocase
condition:
any of them
}Community-contributed rules for Bert, 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
Bert is a ransomware threat group that has disclosed 7 victims in publicly accessible leak site data, representing 0% of all ransomware attacks tracked in this database. The earliest victim disclosure attributed to Bert in our dataset dates to April 2025.
Geographically, Bert has targeted organisations in 6 countries. The most frequently targeted nation is United States with 2 victim organisations. Other heavily targeted nations include United Kingdom, Colombia, Malaysia.
Industry-wise, Bert shows a concentration in the Technology, Transportation/Logistics, Construction sectors. 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, Bert 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 7 most recent of the 7 disclosures we hold for this group; use the link beneath it to page through all of them.
Recent Victim Disclosures (showing 7 of 7)
| # | Organization | Country | Sector | Date |
|---|---|---|---|---|
| 1 | S5 Agency World s5agencyworld.com | 🇬🇧 United Kingdom | Transportation/Logistics | Jun 10, 2025 |
| 2 | Columbia TI columbiati.com.br | 🇨🇴 Colombia | Technology | Jun 5, 2025 |
| 3 | Wawasan Dengkil Sdn Bhd wawasandengkil.com.my | 🇲🇾 Malaysia | Construction | May 22, 2025 |
| 4 | ALL RING TECH CO., LTD. allringtech.com | 🇹🇼 Taiwan | Technology | May 16, 2025 |
| 5 | SIMCO Electronics simco.com | 🇺🇸 United States | Technology | Apr 30, 2025 |
| 6 | Yozgat City Hospital yozgatsehir.saglik.gov.tr | 🇹🇷 Turkey | Healthcare | Apr 9, 2025 |
| 7 | National Ticket Company nationalticket.com | 🇺🇸 United States | Business Services | Apr 6, 2025 |
Frequently Asked Questions
What is Bert ransomware?
Bert is a ransomware threat group that has claimed 7 victims since its first known activity in April 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 Bert attacked?
Bert has claimed 7 victims in our database, representing 0% of all tracked ransomware attacks. The most targeted countries are United States, United Kingdom, Colombia, Malaysia.
Which countries does Bert target?
Bert has attacked organizations in 6 countries. The top targeted countries are: United States, United Kingdom, Colombia, Malaysia.
Which industries does Bert target?
Bert most frequently targets the Technology, Transportation/Logistics, Construction sectors based on victim disclosures in our database.
Is Bert still active?
Bert's most recent victim disclosure in our database was on June 10, 2025. Ransomware groups frequently rebrand or go dormant; monitor this page and our ransomware map for the latest activity.