Clop Ransomware: Immediate Steps to Take & How to Recover Quickly

With rapid encryption and relentless extortion methods, Clop Ransomware targets companies big and small. Learn how this ransomware works, explore real-world attacks, and get expert support to restore your files and get back on track.

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How do I know if Clop ransomware has infected my system?

If you are unable to access your files, and see a notice on your desktop that your files are encrypted and demanding payment, you may be infected with Clop ransomware.

Clop ransomware started to appear in phishing emails some time in 2019. When it encrypts files, it usually changes the name of the files by adding a .clop extension. Clop uses RSA encryption standard, and we know of no functional free decryptor tools for Clop.

More recently Clop ransomware has been known to shift to data exfiltration only and not encrypt systems.

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Disables Backups
Actively seeks and deletes backups to prevent easy recovery after encryption.
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Exfiltration Before Encryption
Extracts sensitive data first to increase pressure during ransom negotiations.
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Your antivirus software is mysteriously deactivated or unresponsive.

Why You Shouldn’t Attempt to Fix It Alone

If Clop ransomware has hit your business, taking the wrong steps can cause permanent data
loss or legal risks. Like a crime scene, a ransomware attack must be preserved—tampering
with encrypted files, attempting self-recovery, or engaging with attackers can destroy
critical evidence and reduce your chances of recovery.

The right response in the first moments after a Clop attack can make the difference
between full recovery and permanent data loss. Follow these critical steps to protect your
data and maximize your chances of restoring operations.

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If you find a “ReadMe” note on your system showing information like the above, you’ve likely suffered a Clop Ransomware attack.

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

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What should I do when I realize my data is encrypted by Clop ransomware?

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.

CLOP RANSOMWARE FACTS & FIGURES

RANSOM AMOUNTS

Clop started out with relatively small average ransom amounts, but the gangs using Clop have now moved towards targeting larger organizations. As such, the average ransom amount has increased.

The average Clop ransom amount is currently around $40,000. Clop gangs demand payment almost exclusively in Bitcoin. It’s better not to pay the ransom, as this encourages the hackers, but if you are in a situation where that it your only option, keep in mind that quick-buy methods of purchasing Bitcoin like PayPal or credit card carry an additional fee of up to 10% and sometimes require verifications which can take days. We keep a reserve cryptocurrency on hand for instant payment with no additional purchase fees.

AVERAGE RANSOM, USD $

AVERAGE LENGTH

Downtime resulting from Clop ransomware is often longer than with normal ransomware attacks. The manual process of communicating with the attackers can further delay response time.

For many organizations, downtime is the most expensive part of a ransomware incident. Another negative side effect of a data breach can be damage to your reputation.

Your goal should be to get your systems back to a productive state as soon as possible. The best way to do this is to call in experts who know the ins and outs of Clop ransomware to complete the removal and restoration process immediately.

CASE OUTCOMES

Our outcomes with Clop ransomware are consistently good. Most gangs using Clop ransomware consistently provide working decryption tools. However, we keep a database of data on scammers to protect our clients.

COMMON ATTACK VECTORS

Phishing is the most common attack vector for Clop ransomware.

Name
Clop/ Clop Ransomware
Danger level
High. Clop ransomware uses military grade encryption and is known to steal sensitive data.
Release date
2019
Affected systems
Windows
File extension
.clop, cIIp, .c11p, .C_L_O_P,
Ransom note
ClopReadMe.txt, Cl0pReadMe.txt, READ_ME_!!!.txt, README_README.txt
Known scammers
None

How to identify Clop ransomware

This is an average Clop ransomware note. (With slight redaction in the interest of public safety)

email
Dear Company We are CL0P^_ group. If you don't know us, search on google. Your company's data has been compromised through your cleo system. We own it now. Using a vulnerability in platform systems Cleo Harmony, VLTrader and LexiCom we gained access to your networks and downloaded all the information from your servers. We do not want to make this public or spread your confidential information, we are only interested in money. We are not interested in political speak just money and money will bring this to finish. Only after you have written to us at the email address provided below, we will show you a unique link to our internal chat for negotiations !!! Contact us via email : [email protected] [email protected] [email protected] We soon show you the files we have and amount. If you pay, data is deleted, we disappear and you never need worry on this again. If you don't pay, you data will publish on our blog. How much to pay? % of you revenues and how much data we take. Speak on chat. Fast reply will receive discount. I. Payment - Bitcoin wallet is provided when you validate the ready to pay; II. Participation of third-parties II.I not allowed III. What Guarantee - All data deleted with high secure tools and video provided - All publishing stop and cancel - Any backdoor disclose - Never attack you again - All discussion delete Do you have our data? - Yes. Ask for list of data and samples How much time to speak to you? - 10 days I need discount? - Come with offer. Low ball increase price. Quick answer deserve some discount. Discuss on chat. What cryptocurrency? - We take bitcoin and Monero Speed of discuss? - Do not stay silent and speak quick min one time a day © CL0P^_- LEAKS 2020 - 2024

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.