Silent Ransom Group Ransomware: What You Need to Know & How to Recover Fast

Silent Ransom Group extorts US law firms and financial, insurance and healthcare firms by impersonating their own IT helpdesk over the phone — no encryptor is ever deployed. See how its fake IT-support calls and in-person USB visits lead to data theft, what its three-day leak-site deadline demands, and how BeforeCrypt helps contain the intrusion and manage the fallout.

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What is Silent Ransom Group Ransomware?

Also tracked as Luna Moth and UNC3753, Silent Ransom Group had close to 100 victim organisations listed on its leak site when Resecurity counted them in June 2026, mostly US law firms targeted since Spring 2023. It skips encryption entirely: access comes via phone calls that impersonate IT support and fake IT visits, data is stolen with tools like AnyDesk and WinSCP, and EclecticIQ reported 2025 demands ranging from about $1 million to $8 million. With no files encrypted, there’s no decryptor to apply — recovery depends on containment, not restoration. BeforeCrypt helps contain the intrusion, assess what was taken and manage next steps.

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Fake IT Helpdesk Calls
Operators impersonate internal IT staff by phone to trick employees into granting remote access.
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No Encryption Used
Data is stolen and held for ransom without ever encrypting a single file.
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Three-Day Leak Deadline
Victims get roughly three days before stolen data is published on the group's clearnet leak site.
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Legitimate Remote-Access Tools
Commercial software like AnyDesk, WinSCP and Rclone is used to move data out undetected.

Why You Shouldn’t Attempt to Fix It Alone

Silent Ransom Group skips encryption altogether, so there’s no file-decryption step to recover from — the group’s leverage is the stolen data itself, not scrambled files. Any tool pitched as a quick fix should still be verified before use, since applying the wrong one to a live incident can make recovery harder. BeforeCrypt assesses exactly what was accessed and which recovery and containment options actually apply to your incident.

Silent Ransom Group’s entire attack is data theft — no files are encrypted, so clean backups won’t make the underlying threat disappear. Stolen material can still be published or sold on the group’s leak site, which is an additional risk for your business separate from any operational disruption. Notification obligations depend on your sector and geography — see the FAQ below for the regulatory clocks that may apply.

Because nothing is encrypted, the priority is establishing what was taken, containing further access and deciding how to respond to the group’s threats. Silent Ransom Group is known to call and email employees and clients directly to increase pressure, alongside its three-day leak-site deadline. BeforeCrypt can run full incident response or work alongside your existing IT team — containing the intrusion, confirming what was exfiltrated, screening for sanctions exposure before any payment, preserving evidence for insurers and regulators, and negotiating with the attackers — including reducing the demand and buying time — where that’s the right route. Handling the technical response, internal coordination, client and regulator communication and any attacker contact all at once strains internal teams, however experienced.

An experienced internal security team can handle substantial parts of the response itself. Our detailed emergency response plan walks through the sequence step by step. A free assessment call with our team helps you decide quickly which parts to keep in-house and where specialist support saves time.

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Silent Ransom Group doesn’t drop a ransom-note file at all — because nothing gets encrypted, there’s no README to find on disk. Instead, victims typically receive an unbranded extortion email within about 30 minutes of the attackers leaving the network, giving three days to respond before stolen data appears on the group’s leak site.

YOU MUST NOT ATTEMPT TO TOUCH, RESTORE OR OVERWRITE THE DATA.

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Hit by Silent Ransom Group Ransomware? Take These Immediate Recovery Steps

If you’ve fallen victim to ransomware, follow these crucial steps:

1

Request 24/7 Ransomware Recovery Help

Get expert guidance to assess, contain, and recover safely.

2

Isolate Infected Systems

Disconnect infected devices to stop the spread. Avoid self-recovery.

3

Preserve Evidence Immediately

Keep ransom notes & logs. Do not restart or modify anything.

Silent Ransom Group ransomware statistics & facts

RANSOM SUMMARY

Name Silent Ransom Group / also tracked as Luna Moth, Chatty Spider, UNC3753, LeakedData
Danger level High. A data-theft extortion group with no encryption payload, but documented follow-through on leak-site publication threats and direct pressure on employees and clients.
Release date Active since March 2022
OS affected Windows — human-operated intrusions via screen-sharing, RMM tools and corporate VDI; no encryptor malware reported for any platform
Appended file extensions None — no files are encrypted
Ransom note filename No file is dropped; extortion is delivered by email
Contact channels Unbranded extortion emails from actor-controlled accounts, follow-up phone calls and voicemails to employees and clients, and a clearnet leak site branded LeakedData

COMMON ATTACK VECTORS

  • Spearphishing Voice (T1598.004) — operators call employees directly, posing as the organisation’s own IT helpdesk to talk them into granting remote access.
  • Phishing (T1566) — benign, invoice-themed emails from actor-controlled accounts prime a target before a follow-up vishing call.
  • External Remote Services (T1133) — victims are guided through Zoom, Teams or Quick Assist into installing legitimate RMM tools such as AnyDesk, Zoho Assist or Splashtop.
  • Hardware Additions (T1200) — when remote social engineering fails, an operator visits the site posing as IT support and connects a USB or external drive under the pretext of imaging the machine.
  • Impersonation (T1656) — callers and, occasionally, in-person visitors pose as the victim’s own IT department throughout the intrusion.

RANSOM AMOUNTS

Silent Ransom Group targets US law firms alongside financial, insurance and healthcare organisations of varying size, gaining access through vishing calls and fake IT-support visits rather than software vulnerabilities.

EclecticIQ reported Silent Ransom Group demands ranging from around $1 million to $8 million in its 2025 campaign data, depending on the size of the breached company. Ransoms are usually paid in Bitcoin. Quick-buy methods of purchasing Bitcoin with PayPal or credit cards do not work for this size of ransom payment and it is important to obtain expert advice to ensure that a payment of this size is legally compliant.

Where negotiation is the right option, our experienced negotiation team has consistently secured meaningful reductions from the initial demand to the final settlement across Silent Ransom Group engagements.

AVERAGE LENGTH

Because Silent Ransom Group doesn’t encrypt files, there is no decryption step to work through — but the group moves fast, often completing data theft within a single business day, and its documented follow-through on leak-site threats keeps the exposure window open until the matter is resolved.

For most ransomware victims, downtime is the most costly aspect of the incident, with potential for considerable reputational harm.

Our extensive experience with Silent Ransom Group ransomware gives us a deep understanding of the gang’s tactics, enabling us to resolve attacks swiftly and restore your files.

How to identify silentransomgroup ransomware

No ransom-note file is placed on disk because Silent Ransom Group doesn’t encrypt anything — it only steals data. Instead, an unbranded extortion email arrives at executives and staff, often within about 30 minutes of the actors leaving the network, demanding contact within three days.

No file dropped — extortion delivered by email
We have copied files from your network. Your organisation's data now sits with us, including financial records, client files and internal communications. You have three days to respond and begin negotiations. If we do not hear from you: - We will contact your employees and clients directly by phone and email. - We will publish your data on our leak site at [.redacted]. - Your clients and regulators will learn you failed to protect their information. To begin negotiations, reply to this message or contact us at [.redacted].

Frequently asked questions

How Does Ransomware Encrypt Files?

Ransomware encrypts files using advanced cryptographic algorithms, typically AES (Advanced Encryption Standard) or RSA (Rivest-Shamir-Adleman). Once executed, the malware scans the system for specific file types and encrypts them, making them inaccessible to the user. Some variants use symmetric encryption (AES), while others combine it with asymmetric encryption (RSA) to lock files with a unique key pair.

Can You Decrypt My Ransomware Encrypted Files?

Decryption depends on the ransomware variant. In some cases, publicly available decryption tools exist, but not all attacks have a known solution. You can submit a free ransomware recovery request, and we will check for possible decryption methods.

Do I have to report a ransomware attack to regulators, and when?

In most cases involving personal data, which applies to nearly every ransomware incident, reporting is legally required. In the EU, GDPR requires notification to the relevant data protection authority within 72 hours of becoming aware of a personal data breach. The UK ICO requires the same 72-hour window. In the US, HIPAA-covered entities have 60 days to notify affected individuals (and immediately for breaches affecting 500+ people). The clock starts from awareness of the incident, not from a full technical understanding.

Is it legal to pay a ransom?

In most jurisdictions, paying a ransom is not illegal in itself — but it can become illegal if the payment ends up going to a sanctioned entity or country (OFAC-designated groups in the US, EU sanctions lists, UK Treasury lists). Before any payment, sanctions screening is essential. BeforeCrypt handles this compliance layer as a standard part of every engagement.

Will paying the ransom actually get my files back?

Most established ransomware groups do provide working decryption tools when paid — the business model depends on their reputation for delivery. However, decryptors are often slow, incomplete, or corrupt a percentage of files during recovery. This is where working with a specialist matters: BeforeCrypt tracks the delivery reliability of specific groups, negotiates sample-file decryption as proof of capability where the group allows it, and plans realistic recovery timelines based on our own engagement history with each group.

What happens if we don't pay the ransom?

Most modern ransomware groups follow through on publication threats — stolen data appears on the group's leak site, is often mirrored to Telegram and dark web forums, and may be sold to third parties. Recovery becomes limited to whatever you can rebuild from backups.

Are our files still at risk if we have working backups?

Backups protect against file loss but not against data theft. Most modern ransomware groups exfiltrate sensitive data BEFORE encryption and threaten to publish it regardless of your recovery capability. This is why leak-site publication and negotiation still matter even for organisations with clean, offline backups — and why "we can just restore from backup" rarely tells the full story.

Should we contact law enforcement after a ransomware attack?

In most jurisdictions, yes — reporting is a standard part of a ransomware incident and, in some cases, legally required. In the US, that means the FBI (via IC3 or a local field office) and CISA. In the EU, national CERT and cybercrime units. Reporting does not obligate you to any specific recovery path but does open access to threat intelligence and, occasionally, decryption tools recovered by law enforcement.

Do you have deep experience with ransomware incidents?

Yes. We’ve handled 1,700+ incidents across ransomware, BEC and data-leak extortion. We identify the variant, decide decrypt vs. clean verified restore, and guide a controlled return to operations. When needed, we support negotiation & compliance—always legally and with a clear audit trail.

Will insurers accept your findings and reports?

Yes. We produce insurer-ready incident reports with a defensible timeline, scope, likely entry path, exfiltration assessment, actions taken, and chain-of-custody. We can join the adjuster call, map our findings to your carrier’s forms, and provide GDPR/NIS2 notifications where required. Final acceptance always depends on the policy and carrier, but our packages are designed to speed up approvals and reduce back-and-forth.

How is this different from my MSP or the insurer’s hotline?

MSPs keep IT running; they’re not built for evidence handling and incident triage. Insurer panels optimize claims, not necessarily speed & clarity for your business. We work alongside both: kick off in ≤2h, run forensic triage with chain-of-custody, coordinate safe containment, and deliver executive- and insurer-ready findings—without taking your environment hostage.

Why Should I Use A Cyber Incident Service?

Because it turns chaos into fast, safe recovery. We cut downtime and limit damage while preserving evidence. Within ≤48h you get a forensic triage pack (timeline, likely entry path, scope, decrypt-vs-clean-restore decision, go-live criteria) so leadership can act with confidence. Result: controlled, verified restart—not guesswork.