ThreeAM Ransomware
Under attack by ransomware or suffering a cyber breach?
Speed is critical when facing a live cyber attack. If you believe you’ve been compromised, by the ThreeAM ransomware group or another threat actor - contact us immediately.
About ThreeAM ransomware group
Emerging in mid-2023, ThreeAM is a relatively new but notable ransomware strain that has attracted attention due to its unique use of the Rust programming language and its targeted, manual deployment techniques. This threat group is known for leveraging remote access methods to infiltrate networks before executing their ransomware attacks.
An infection with ThreeAM results in the encryption of systems and critical files, with victims receiving a ransom note, as shown here, demanding cryptocurrency payment in exchange for decryption keys.
What we can help with:
- Encrypted files & ransomware data recovery
- Incident response and containment
- Secure data restoration and system recovery
- Use of ransomware decryption tools and data recovery software
- Development of incident response plans and disaster recovery solutions
- Post-incident reviews and security hardening
Request a call back
If your organisation has been infected with ransomware contact us immediately.
How ThreeAM operators work
ThreeAM (also stylised as 3AM) is a rare and emerging ransomware variant first identified in 2023. Unlike many mainstream ransomware operations, ThreeAM appears to be deployed as a backup payload, typically when primary ransomware (such as LockBit) is detected and blocked.
Written in Rust, a modern programming language that offers increased speed and stealth, ThreeAM can be compiled for multiple operating systems. This makes it more difficult for traditional security software to detect and analyse.
The threat group behind ThreeAM uses a hands-on approach, manually deploying the ransomware after gaining remote access through techniques such as phishing, RDP compromise, or exploiting unpatched vulnerabilities. Communication during the attack may even involve a voice or video call to negotiate ransom demands or provide instructions. Once inside the network, they attempt to exfiltrate sensitive data before launching encryption of critical files, following a typical double extortion model.
According to a principal threat researcher, ThreeAM’s combination of stealthy deployment, manual execution, and the use of encrypted files for ransom makes it a particularly challenging threat to defend against.
We are equipped to deal with an attack from any ransomware group.
Don’t hesitate to contact us if you are under attack from a ransomware group not listed above.
Recognising a ThreeAM attack
ThreeAM is deployed manually, often during late-night hours (hence the name), once attackers have already obtained administrative access to the target environment. The attackers typically gain control of user accounts with elevated privileges or compromise virtual machines to move laterally within the network. Victims may also notice unwanted emails suddenly disrupting normal operations as part of the attack’s initial phase. The ransomware then encrypts files with the .threeamtime extension and leaves behind a note outlining payment demands and threatening data exposure.
Before launching encryption, ThreeAM has been observed attempting to terminate various security and backup services, including deleting volume shadow copies, to avoid detection and recovery. This allows the attackers to bypass traditional security tools and make restoration more difficult. The group often focuses on the primary targeted employee’s credentials to gain deeper access and maximise impact.
Why you must not interfere with your ransomware environment
If you discover a physical break-in at your offices, your first instinct would be to call the police; touch nothing and let them search for clues. Then, your focus would shift to restoring business operations.
A cyber-attack requires the same approach. Your digital environment is a CRIME SCENE. It is crucial to leave the environment untouched to allow for a forensic investigation.
This is not a task for your IT team or MSP. Digital Forensic specialists are available 24/7 to assist you, just like in a physical crime.
| description | Sector | Date Discovered | Attack Date | Country | Screenshot |
|---|---|---|---|---|---|
| Public Sector | 01/05/2026 01:35 PM | 01/05/2026 01:34 PM | US | ||
| Healthcare | 01/05/2026 01:34 PM | 01/05/2026 01:34 PM | US | ||
| Public Sector | 01/05/2026 01:34 PM | 01/05/2026 01:34 PM | US | ||
| Healthcare | 01/05/2026 01:34 PM | 01/05/2026 01:34 PM | US | ||
| Healthcare | 01/05/2026 01:34 PM | 01/05/2026 01:33 PM | US | ||
| Business Services | 01/05/2026 01:33 PM | 01/05/2026 01:33 PM | |||
| Agriculture and Food Production | 01/05/2026 01:33 PM | 01/05/2026 01:33 PM | NL | ||
| Transportation/Logistics | 01/05/2026 01:33 PM | 19/11/2025 12:00 AM | |||
| Manufacturing | 01/05/2026 01:32 PM | 01/05/2026 01:32 PM | DE | ||
| Business Services | 25/05/2025 07:01 PM | 06/02/2025 07:00 PM | US | ||
| Business Services | 25/05/2025 07:00 PM | 18/02/2025 06:59 PM | US | ||
| Construction | 25/05/2025 06:58 PM | 21/02/2025 12:00 AM | US | ||
| Healthcare | 25/05/2025 06:56 PM | 19/03/2025 06:55 PM | US | ||
| Technology | 25/05/2025 06:55 PM | 06/02/2025 12:00 AM | US | ||
| Construction | 25/05/2025 06:53 PM | 03/03/2024 12:10 PM | US | ||
| Financial Services | 25/05/2025 06:52 PM | 18/02/2025 12:00 AM | US | ||
| Technology | 25/05/2025 06:50 PM | 25/05/2025 06:49 PM | US | ||
| Business Services | 25/05/2025 06:49 PM | 20/05/2025 12:00 AM | US | ||
| Technology | 13/02/2025 05:33 PM | 15/01/2025 12:00 AM | IT | ||
| Healthcare | 11/02/2025 10:39 AM | 01/02/2025 12:00 AM | DE | ||
| Consumer Services | 05/02/2025 09:28 PM | 05/02/2025 09:28 PM | US | ||
| Consumer Services | 30/01/2025 12:03 PM | 30/01/2025 12:03 PM | FI | ||
| Education | 15/01/2025 10:09 AM | 15/01/2025 10:09 AM | US | ||
| Healthcare | 09/01/2025 01:02 PM | 27/11/2024 12:00 AM | DE | ||
| Manufacturing | 17/12/2024 04:43 PM | 29/11/2024 12:00 AM | JP | ||
| Public Sector | 04/12/2024 02:52 PM | 04/12/2024 02:52 PM | US | ||
| Manufacturing | 13/11/2024 11:52 AM | 13/11/2024 11:52 AM | US | ||
| Business Services | 31/10/2024 01:32 PM | 28/09/2024 12:00 AM | AU | ||
| Healthcare | 31/10/2024 01:30 PM | 31/10/2024 01:30 PM | US | ||
| Manufacturing | 31/10/2024 01:28 PM | 08/10/2024 12:00 AM | BR | ||
| Manufacturing | 31/10/2024 01:26 PM | 10/10/2024 12:00 AM | US | ||
| Business Services | 31/10/2024 01:24 PM | 24/10/2024 12:00 AM | AU | ||
| Healthcare | 31/10/2024 01:21 PM | 19/10/2024 12:00 AM | US | ||
| Healthcare | 24/10/2024 02:15 PM | 24/10/2024 02:15 PM | US | ||
| Healthcare | 10/10/2024 07:03 PM | 10/10/2024 07:03 PM | US | ||
| Manufacturing | 30/09/2024 07:49 PM | 30/09/2024 07:49 PM | GB | ||
| Transportation/Logistics | 30/09/2024 05:50 PM | 30/09/2024 05:50 PM | GB | ||
| Education | 30/09/2024 05:48 PM | 18/06/2024 12:00 AM | GB | ||
| Healthcare | 30/09/2024 05:46 PM | 06/06/2024 12:00 AM | AU | ||
| Transportation/Logistics | 30/09/2024 05:44 PM | 25/07/2024 12:00 AM | SG | ||
| Agriculture and Food Production | 18/09/2024 12:12 PM | 26/08/2024 12:00 AM | ES | ||
| Healthcare | 12/09/2024 06:10 PM | 12/09/2024 06:10 PM | US | ||
| Manufacturing | 16/05/2024 04:42 AM | 16/05/2024 04:42 AM | US | ||
| Technology | 16/05/2024 04:40 AM | 16/05/2024 04:40 AM | BR | ||
| Business Services | 15/04/2024 07:34 AM | 21/03/2024 12:00 AM | FR | ||
| Healthcare | 25/03/2024 11:47 AM | 25/03/2024 11:47 AM | US | ||
| Business Services | 27/02/2024 12:56 PM | 27/02/2024 12:56 PM | GB | ||
| Technology | 22/02/2024 02:42 PM | 14/11/2023 12:00 AM | US | ||
| Business Services | 22/02/2024 02:41 PM | 22/02/2024 02:41 PM | AU | ||
| Agriculture and Food Production | 21/02/2024 12:44 PM | 21/02/2024 12:44 PM | US | ||
| Manufacturing | 12/02/2024 10:29 PM | 12/02/2024 10:29 PM | US | ||
| Business Services | 01/02/2024 11:04 PM | 01/02/2024 11:04 PM | MX | ||
| Business Services | 12/01/2024 07:27 PM | 12/01/2024 07:27 PM | CA | ||
| Manufacturing | 12/01/2024 07:26 PM | 12/01/2024 07:26 PM | US | ||
| Agriculture and Food Production | 12/12/2023 05:42 PM | 12/12/2023 05:42 PM | |||
| Business Services | 12/12/2023 05:42 PM | 12/12/2023 05:42 PM | US | ||
| Manufacturing | 06/12/2023 08:57 AM | 06/12/2023 08:57 AM | |||
| Manufacturing | 05/12/2023 04:11 PM | 05/12/2023 04:11 PM | |||
| Business Services | 27/11/2023 04:23 PM | 27/11/2023 04:23 PM | |||
| Construction | 22/11/2023 07:26 AM | 22/11/2023 07:26 AM | FR | ||
| Agriculture and Food Production | 18/11/2023 11:07 AM | 18/11/2023 11:07 AM | RO | ||
| Business Services | 26/10/2023 07:54 PM | 26/10/2023 07:54 PM | GB | ||
| Business Services | 26/10/2023 12:21 PM | 26/10/2023 12:21 PM | |||
| Manufacturing | 28/09/2023 01:18 PM | 28/09/2023 01:18 PM | |||
| Hospitality and Tourism | 22/09/2023 01:17 PM | 22/09/2023 01:17 PM | |||
| Manufacturing | 22/09/2023 01:16 PM | 22/09/2023 01:16 PM | |||
| Healthcare | 22/09/2023 11:44 AM | 22/09/2023 11:44 AM | |||
| Construction | 14/09/2023 09:33 PM | 24/08/2023 12:00 AM | MY | ||
| Construction | 14/09/2023 09:33 PM | 29/08/2023 12:00 AM | US | ||
| Agriculture and Food Production | 14/09/2023 09:32 PM | 04/08/2023 12:00 AM | US | ||
| Agriculture and Food Production | 14/09/2023 09:32 PM | 22/08/2023 12:00 AM | US | ||
| Healthcare | 14/09/2023 09:31 PM | 04/09/2023 12:00 AM | US | ||
| Construction | 14/09/2023 09:31 PM | 12/09/2023 12:00 AM | US |
Known threat actors
Ransomware groups behind the attacks
Below is a breakdown of the most active ransomware groups and the variants driving their attacks.
Post breach actions
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Call a NCSC Cyber Incident Response approved supplier Some NCSC providers will fund up to 48 hours of investigation into your incident.
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Report the incident to Report Fraud
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Locate your business continuity plan Work out what you can do without access to your systems and data.
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Identify your business insurance contact details
Who are we and what experience do we have in responding to cyber incidents?
We are accredited to ISO 27001 and recognised by the UK’s National Cyber Security Centre (NCSC).
We provide comprehensive cyber risk management services, with a core focus on Digital Forensics and Incident Response (DFIR). Our capabilities are driven by a 24/7 Security Operations Centre and a dedicated in-house intelligence team that delivers timely, actionable threat reporting.
With decades of collective cyber security experience, we have the expertise to assume operational ownership of your entire IT security architecture – simplifying and strengthening cyber security across your business.
As an Assured Service Provider for Cyber Incident Response (CIR) at the Standard Level. This accreditation demonstrates our ability to deliver high-assurance, effective support in response to a wide range of cyber threats.
Your NCSC-approved supplier is a specialist crime scene investigator who will:
- Isolate and preserve your environment for forensic investigation.
- Identify where the data has been duplicated and issue a legal takedown order.
- Identify your data, application and systems restore points. These might be at different points in time and will need to be carefully restored and reconstructed in a pristine environment.
- Liaise with your business insurance company and if needed, with the Police.
- Advise you on notifying your customers of your situation.
- Rebuild your systems, restore your data and get you back to full operation. Note: This process can take between 2 weeks – 2 months.
Working with us
Our response process
Our team are ransomware recovery specialists with a proven, streamlined approach to resolving incidents quickly and effectively.
Step 1: Triage
We deploy our incident response team the same day. From the first call, we begin onboarding, introduce key stakeholders, set communication schedules, and start gathering critical information to guide the response.
Step 2: Investigation
DFIR (Digital Forensic Incident Response) teams investigate breaches to identify vulnerabilities, attack vectors, and system impacts from ransomware such as Data Loss (PII). We deliver clear forensic insights to guide mitigation.
Step 3: Contain
Our onsite and remote teams act fast to stop the attack in its tracks. That includes isolating affected systems, removing malicious code, and putting protections in place to prevent further spread or damage.
Step 4: Remediate & Eradicate
Once contained, we work to fully eliminate the threat. This includes fixing exploited vulnerabilities, restoring systems to a secure state, and ensuring no traces of the attack remain.
Step 5: Recover
Our incident response teams help get your business back to normal. We restore access to systems, recover data, and ensure services are safe, stable, and functioning, with minimal downtime.
Step 6: Post Incident
We conduct a full review of the incident response and recovery efforts. Together we assess what happened, what worked, and what can be improved, helping you build stronger defences for the future.
Forensic analysis to drive recovery
Our process includes a thorough digital forensic analysis from step two where the output becomes a central component of business recovery. This is because understanding the attack is of critical importance:
Informing an initial infection date
The extent and spread of infection
Data exfiltration having an impact on regulatory positions
Ensuring that the attacker and any tooling or artefacts they leave behind are eradicated
It is critical that the analysis of digital evidence is carried out to an agreed plan.
Maximising early root cause discovery and legal leverage
The process is purpose-built to uncover the root cause as early as possible, which is essential to inform remediation / eradication and recovery as well as supporting a legal take-down case if this is applicable. A legal take-down means we can assist in the legal enforcement that stops the criminals from publishing the data, thus undermining the ransom notice.
Our Digital Forensic and Incident Response (DFIR) teams maintain consistent communication throughout. Dedicated Incident Managers and technical engineering leads provide updates during the Cyber Incident Response journey, utilising risk registers and working within change management processes, all from triage through to post-incident, delivering successful business recovery.
Key take aways
- You will not be able to access your systems or data.
- It is advised to disconnect from the internet and shut down your systems, including PCs, to prevent further infections.
- Your Office 365 system might also be compromised, allowing the attackers to monitor your responses. Avoid communicating with individuals through your primary email or team systems.
- Threat actors typically infiltrate your system at least 2-4 weeks before you become aware of the attack. Your data will have already been exfiltrated. If your system is encrypted, this was not an overnight event.
- Ransom demands in the UK typically range from £500,000 to £3 million, with some sectors, like education, facing demands that exceed £5 million
- Paying the ransom may violate financial sanctions, which is a criminal offence and could result in a custodial sentence or further financial penalties.
- If your data is sold or published online, it puts your customers and staff at risk, potentially implicating you in a Data Protection breach.
- You will need to submit a data takedown request to the initial location where the data was transferred.
- Do not overwrite the encrypted data. It is crucial to determine when the infection began and where the data was sent.
- Avoid rebuilding from the latest backup, as it is likely to be infected.
Why should I trust Zensec to do this work rather than my IT team?
A forensic analysis needs to be meticulous and a clean restore and recovery requires a wealth of experience not normally available in an in-house team who must provide a broader range of IT support skills:
Internal IT teams don’t have the necessary skill set to resolve security encryption issues themselves.
IT teams may recover to the same position with indicators of compromise ready to do it again… which can lead to another breach.
Internal teams are pressured to restore business operations and may recover before forensic analysis even begins, potentially destroying the crime scene before completion.
We can help
Frequently asked questions
Key information when you’re under pressure.
Yes, ThreeAM is a form of ransomware. It encrypts data on the target system and demands payment for decryption keys, often threatening to leak exfiltrated data unless the ransom is paid. As one of the more recent emerging threats, ThreeAM combines manual deployment with data extortion tactics, making it particularly dangerous for organisations lacking strong cyber security defences.
The ThreeAM ransomware entered your system by one of several possible methods:
Compromised credentials
Phishing attacks
Vulnerabilities in remote services
In many cases, the attack begins when a compromised computer is used as a foothold, often through the actions of a tech support team member unknowingly allowing remote access or through the misuse of privileged accounts.
A threat intelligence analyst would identify this as part of a broader pattern of targeted, hands-on ransomware operations. To reduce the risk of future incidents, we recommend adopting the following policies:
Educate your staff on the importance of cyber security
Enforce the use of strong passwords
Enable multi-factor authentication
Remove unused or old user accounts
Perform regular, tested backups
Deploy timely updates to all software and systems
After recovering from a ThreeAM ransomware attack, Zensec strongly advises updating your business continuity plan to reflect the lessons learnt during the incident and recovery process.
A ransomware attack presents the most significant threat to your business by:
- Disabling your access to systems, which could hinder machinery operation or impede progress through your business processes.
- Blocking access to critical data concerning suppliers, shipments, customers, orders, or steps in your business workflow.
In the event of a business interruption, identifying your position in the supply chain and sustaining operations can be challenging. If the disruption continues, maintaining business continuity becomes critical. Once systems and data are restored, addressing backlogs and establishing future operational protocols are essential.
Ransomware ranks only behind receivership in terms of its capacity to incapacitate a business.
The NCSC is the UK National Cyber Security Centre. They provide cyber security guidance and support, helping to make the UK the safest place to live and work online. They have defined a Cyber Incident Response procedure and they have approved and accredited suppliers to provide this service.
As a recognised Assured Service Provider by the National Cyber Security Centre (NCSC), Zensec provide comprehensive cyber risk management services that are designed to Protect, Detect & Mitigate cyber security threats across the UK.
Report Fraud is the UK's national reporting centre for fraud and cybercrime. Whether you have been scammed, defrauded, or experienced cybercrime in England, Wales, or Northern Ireland, Report Fraud offers a central point of contact for information on fraud and financially motivated cybercrime.
https://www.reportfraud.police.uk/https://www.actionfraud.police.uk/
Facing genuine pressure, there's a crucial decision to make - one that could rescue your organisation from weeks of operational standstill, reputation damage, and client data loss. Yet, the probability of a favourable outcome remains slim, emphasising the importance of engaging a specialised ransomware incident response team. They are your most viable recourse for navigating a ransomware incident.
The NCSC have documented the deliberations for paying ransomware: https://www.ncsc.gov.uk/ransomware/home
Important Reminder: It is a criminal offense to pay money to people who are subject to financial sanctions. The list of who is subject to financial sanctions is constantly changing.
The latest iteration can be found here: https://www.gov.uk/government/publications/financial-sanctions-consolidated-list-of-targets
ThreeAM operators typically gain remote access through compromised user accounts, phishing attacks, or exploiting vulnerabilities in remote services like RDP. Once inside, they manually deploy the ransomware to maximise impact.
After gaining initial remote access, ThreeAM attackers perform lateral movement by compromising additional user accounts or virtual machines. This allows them to navigate through the network, escalate privileges, and deploy ransomware more broadly across the target environment.
Dealing with a ransomware attack?
Our ransomware recovery service can help
Our expert team works quickly to contain the breach, recover your data, and restore your systems to full operation. We’ll guide you through every step of the recovery process and help strengthen your defences to prevent future attacks. Regain control with Zensec - trusted support when it matters most.

