A new form of ransomware, carrying the extension .Clop was recently reported by malware researcher @JakubKroustek. The .Clop files virus is from the ransomware type and it aims to encrypt the files on the computers infected by it shorty after which add the ClopReadMe.txt ransom note, that contains extortion instructions on how the victim can pay a hefty ransom in order to get his or her files back. If your computer has been infected by Clop ransomware, we would suggest that you read this article carefully.
|Short Description||Clop ransomware aims to encrypt the files on the computers of victims and then the ransomware virus extorts victims to pay money in cryptocurrencies to get the files to work again.|
|Symptoms||Clop ransomware adds the .Clop to the encrypted files and they cannot be opened. The virus also drops the note ClopReadMe.txt.|
|Distribution Method||Spam Emails, Email Attachments, Executable files|
|Detection Tool|| See If Your System Has Been Affected by Clop Ransomware |
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|User Experience||Join Our Forum to Discuss Clop Ransomware.|
|Data Recovery Tool||Windows Data Recovery by Stellar Phoenix Notice! This product scans your drive sectors to recover lost files and it may not recover 100% of the encrypted files, but only few of them, depending on the situation and whether or not you have reformatted your drive.|
.Clop Files Virus – Update March 2020
News about the .Clop ransomware became known to us in several reports. According to the new information one of the hacking groups has started to release files of a company called EV CARGO Logistics due to the fact that they have not paid the requested fee in the designated time frame. Information about the file names has been posted online in several communities giving further details about the hijacked data:
Collection credits wk 0.xlsx, Collections screen shots.docx, Copy – Wk 35 FY20 – Weekly Overdue Report – NFT.xlsx, Copy Wk 37 FY20 – Weekly Overdue Report – NFT.xlsx, Copy of 2SFG Willand Invoice acking Wk 15 (3).xlsx, Copy of 5 Week cost report – V2 01.xslm, Copy of All Week 08 2020 Weekly Payroll Postings.xlsx, Copy of AR Task List.xlsx, Copy of ASDA NFT Central Emloyment Costs 2019.xlsx, Copy of Collection Credits Fuel Surcharges Wk 32.xlsx, Copy of Collection Credits Fuel Surcharge Wk 3.xlsx, Copy of Collection Credits Fuel Surcharge Wk 34 (002).xlsx, Copy of Collection Credits Fuel Surcharges Wk 36.xlsx, Copy of Evesham.xlsx, Copy of SMBC week 20 19-20.xls, Cranswick CRAMAL_BACKING_WK30_FY20.pdf, CS log 59819 Copernus.xlsx, Customers for Collection.xlsx, data.xslx, Dav – Accruals Wk 41.xlsx, Daventry Coda Costing Pack FY19 Master.xlsx, Depot Summary – St Albans (1).xlsx, Depot Summary – St Alans.xlsx, Derv surcharge calc.xlsx, DFBR_UK_1921_20190709_NFT Distribution Operations Ltd_Bespoke Reporting_20190709_NFT Distribution_Consumption Report_Jun19.xlsx, dir.txt, Doc1.docx, document (4) Rachel Saunders 21 October 2018 101 PM MARKED (1).pdf, document (4) Rachel Saunders 21 October 2018 101 PM MARKED.pdf, Emergevest Week Page.xlsx, Envrio report NFT 12 months.xlsx, ev cargo.zip, EVCL – Asda Dav Salaried Overtime wK8.xlsx, EVCL Warehouse Company Details.xlsx, EVCL Week cost report EVCL – V3.03 – Ames.xlsm, Eyescan numbers available.xlsx, FC Analysis to Wk30.xlsx, FINANCIAL_CALENDAR.pdf, Forza IPL supplier form.xlsx, Full VOID Phone List Oct 18.xlsx, Goods in by Pallet.xlsx, grid (1).xlsx
The leaked sensitive information may include the following:
- Network Drive Passwords
- Client Information
- Financial Information
On a separate note another hacking group is offering a service called network security consulting for corporations — allegedly the hackers are offering penetration testing and other related actions. The price requested by them is $250K in Bitcoin (BTC).
.Clop Files Virus – Update February 2020
In February 2020 information about Clop ransomware infections became known to us — a Dutch university has allegedly paid the sum of 30 BTC to hackers following a public press release. This amount is about $220,000 and has been given to the hackers following a network-wide infection that took place around Christmas last year. The information was live streamed to the public and the staff explained how they were aware about the impact the virus had on their internal networks — and particularly the effect on the files of the staff and students.
The trouble with hackers began back in October when phishing emails were opened on workstations that were on the internal network of the university. Through the malicious code placed inside hackers were able to infect the internal systems. Further damage was done when they outdated server configurations which were exploited in order to acquire administrative privileges. Later on this access was used to deliver the Clop ransomware.
.Clop Files Virus – Update November 2019
The .Clop virus has seen a newer version which includes the ability to detect and bypass the Windows Defender security suite. The new CryptoMix variant can also overcome the Microsoft Security Essentials package (used in older versions of Microsoft Windows) and also the MalwareBytes anti-virus. This new release uses the same .clop extension and creates a ransom note that is called ClopReadMe.txt.
The analysis performed by the security researcher shows that anti-virus bypass is performed before the encryption phase is done. These services are disabled by reconfiguring the Windows Registry and removing the configuration settings of these processes:
- Behavior Monitoring
- Real-Time Protection
- Sample Uploading
- Tamper Protection
- Cloud Detection
- Anti-Spyware Detection
.Clop Files Virus – Update October 2019
The security analysis of the ongoing .clop virus samples shows that the threat is being launched by a new hacking group and using a new distribution technique. It appears that the criminals this time are experienced enough as many samples have been detected. The .clop virus is primarily being sent via infected documents — they can be spreadsheets, databases, text files and presentations. When they are opened a prompt will ask them to enable the built-in macros which will trigger the infection.
One of our sources states that it is possible that the attacks are being performed by the TA505 hacking collective. They are known for executing complex attacks against high-profile targets, specifically enterprise industries and government establishments.
.Clop Files Virus – Distribution Methods
Another possible mean of replication of the .Clop file ransomware is believed to be malicious macro code that may be inserted into documents. These documents may be sent to victims as a result of being embedded as e-mail attachments, where they may pretend to be invoices for purchases and several other types of seemingly important files, like:
- Invoices for online retail stores.
- Banking documents.
- Work-related documents.
Once the victim opens the document, it may ask him or her to “Enable Editing” by cicking on the button, similar to what the image below shows:
This triggers the malicious script, which may result in the unpacking of the malicious executable and running it automatically on the computer of the victim.
.Clop Ransomware – More Information
Once installed on the victim’s computer, the .Clop file ransomware is the type of virus that aims to infect computers and then extort the owner for money. The analysis of the virus so far detected several files, associated with Clop Ransomware:
File name: 3c8e60ce5ff0cb21be39d1176d1056f9ef9438fa.exe
File size 235.5 KB
File size:100.5 KB
Once .Clop file ransomware already infected a computer, the virus may drop it’s malicious executable directly on the desktop of the victim PC. Besides it, .Clop ransomware also drops it’s ransom note file, called ClopReadMe.txt. It looks like the following:
Your network has been penetrated.
All files on each host in the network have been encrypted with a strong algorithm.
Backups were either encrypted or deleted or backup disks were formatted.
Shadow copies also removed, so F8 or any other methods may damage encrypted data but not recover.
We exclusively have decryption software for your situation
No decryption software is available in the public.
DO NOT RESET OR SHUTDOWN – files may be damaged.
DO NOT RENAME OR MOVE the encrypted and readme files.
DO NOT DELETE readme files.
This may lead to the impossibility of recovery of the certain files.
Photorec, RannohDecryptor etc. repair tools are useless and can destroy your files irreversibly.
If you want to restore your files write to emails (contacts are at the bottom of the sheet) and attach 2-3 encrypted files
(Less than 5 Mb each, non-archived and your files should not contain valuable information
(Databases, backups, large excel sheets, etc.)).
You will receive decrypted samples and our conditions how to get the decoder.
Your warranty – decrypted samples.
Do not rename encrypted files.
Do not try to decrypt your data using third party software.
We don`t need your files and your information.
But after 2 weeks all your files and keys will be deleted automatically.
The final price depends on how fast you write to us.
Once the Clop ransomware virus has already compromised a given machine, it is reported in a VMRay analysis to interact with the following Windows system files:
The Clop ransomware virus may also extract the following information from victimised machines:
- System time.
- OS Type.
- Keyboard language.
In addition to this analysis of Clop Ransomware reports it to perform the following activities:
- Delays it’s own execution.
- Changes appearance of folders.
- Creates a lot of new files.
- Overwrites code in files.
The virus does not communicate over the web to cyber-criminal control servers and does not seem to delete any volume shadow copies of the machines it has infected.
Clop Ransomware – Encryption Process
The encryption of Clop ransomware is believed to be conducted with the aid of the RSA (Rivest-Shamir-Adleman) encryption algorithm. The ransomware virus may first scan for the file types it is set to encrypt. These files are usually only the usable files, of the following types:
- Virtual Drive.
Once the ransomware encrypts those files, it also renames them, making the file start to look unrecognisable:
Remove Clop Ransomware and Try to Restore .Clop Files
Before you actually start to think about removing Clop Ransomware from your computer, we would suggest you do a backup first.
For the removal Clop ransomware, we would suggest that you follow the removal instructions underneath. They have been created to help you delete the files of this ransomware either manually or automatically, depending on which situation is appropriate. If you have tried manual removal and you cannot seem to delete this ransomware, it is strongly recommended to remove it automatically with the aid of an advanced anti-malware software. Such tool will help you delete the Clop ransomware virus from your computer and then will also ensure that future protection for your computer is also activated.
If you want to try and restore .Clop encrypted files, the first thing you should be aware of is not to tamper with them in any way manually, because they may break down if you try to remove the extension. We have recommended several methods that may “go around” direct decryption with no 100% guarantee to be able to recover all your files, but they are your best bet, since there is no direct decryption of .Clop files at the moment.