.rumba Files Virus - How to Remove It
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.rumba Files Virus – How to Remove It

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This blog post has been created with the main goal to explain what is the .rumba file variant of STOP ransomware and show you ways via which you can try and remove it from your computer.

A new ransomware virus going by the .rumba file extension has been detected by security researchers. The virus aims to append the .rumba file extension on the files that have been encrypted by it. The virus’s primary purpose is to convince victims to pay ransom in order to retrieve their files. If your computer system has been infected by the .rumba ransomware variant of STOP, we would suggest that you read this article.

Threat Summary

Name.rumba Files Virus
TypeRansomware, Cryptovirus
Short DescriptionVariant of the
Remove STOP ransomware totally. "STOP" is the name of a cryptovirus. Follow the STOP ransomware removal instructions provided at the end of the article.
STOP ransomware, part of the DJVU ransomware strain. Aims to encyrpt files on the compromised computer and then ask victims to pay ransom to get them back.
SymptomsFiles are encrypted with an added .rumba file extension. The virus then drops a ransom note, containing the extortion message.
Distribution MethodSpam Emails, Email Attachments, Executable files
Detection Tool See If Your System Has Been Affected by .rumba Files Virus

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User ExperienceJoin Our Forum to Discuss .rumba Files Virus.
Data Recovery ToolWindows 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.

.rumba Files Virus – Distribution Methods

The primary methods of distribution that are used by the .rumba ransomware are believed to be via e-mail spam campaigns, that are set to distribute malicious files attached to them, for example:

The files that are attached to the e-mails might be of the following file types:

  • .JS (JavaScript files).
  • .DOCX(Microsoft Word document with malicious macros).
  • .PDF(Adobe Reader files).
  • .EXE(Executables).
  • .VBS (Visual Basic Script Files).

The malicious files can also be uploaded on suspicious websites, where they might pretend to be various different types of legitimate programs, such as:

  • Portable software.
  • Cracks.
  • Patches.
  • License Activators.

So far, the .rumba variant of STOP Ransomware was reported to be spread across the following countries:

  • Poland
  • Malaysia
  • South Korea
  • Thailand
  • Indonesia
  • Ukraine
  • Venezuela
  • Equador
  • Chile
  • Brasil
  • Turkey
  • Greece
  • Egypt
  • Others

Another way of replication which was recently reported by malware researcher Amigo A at id-ransomware.blogspot.com is to propagate via malicious Windows Update or programs that have already been previously compromised:

.rumba Files Virus – Infection Activity and Analysis

Rumba ransomware is a part of the STOP ransomware virus family of variants, most of which have been detected to use the following extensions:

And this is just a part of the many variants of

Remove STOP ransomware totally. "STOP" is the name of a cryptovirus. Follow the STOP ransomware removal instructions provided at the end of the article.
STOP Ransomware virus. The virus is from the ransomware type which means that it aims to encode your files and then demand a huge sum, around $600 to pay in the time frame of 3 days to get the cyber-criminals to restore your files and if that Is not accomplished, the ransomware virus will likely increase the ransom payment.

The main infection file of .rumba virus has been reported by researchers and uploaded in VirusTotal with the following information:

→ SHA-256:48586462fb24005bcf8139ac2a8af0873b9bb99cb544fccaa24ac124c099beb9
File name:dump-2228224.mem
File size:347.5 KB

The virus file was reported to perform HTTP requests to domains that were related to rosalus.ug. The requests are as follows:

→ GET Request from hxxp://rosalos.ug/get_v2.php?pid=C28944D8AF49B3B7F79ED7D4845CB9B3
GET Request from hxxp://rosalos.ug/xxx/updatewin1.exe

In addition to this, the virus may use the following IP addresses to communicate:

  • 77.123.139.189:443
  • 185.120.56.96:80

Upon infection, the .rumba variant of STOP ransomware may open the follwing files on the infected computer:

→ \\.\PIPE\ROUTER
\\.\PIPE\lsarpc
c:\autoexec.bat
C:\48586462fb24005bcf8139ac2a8af0873b9bb99cb544fccaa24ac124c099beb9
C:\WINDOWS\Registration\R000000000007.clb
C:\WINDOWS\system32\rsaenh.dll

Furthermore, the virus may read and extract information from the following files:

→ c:\autoexec.bat
C:\48586462fb24005bcf8139ac2a8af0873b9bb99cb544fccaa24ac124c099beb9
C:\WINDOWS\Registration\R000000000007.clb
C:\WINDOWS\system32\rsaenh.dll

Shortly after this, .rumba STOP ransomware may copy the following object in the %AppData% directory of Windows:

→C:\Documents and Settings\\Local Settings\Application Data\595e5c57-6a16-4ce3-b5da-63e1ccaec198\48586462fb24005bcf8139ac2a8af0873b9bb99cb544fccaa24ac124c099beb9

For some reason, the same file that was copied is later deleted from the same directory.

The .rumba file ransomware may also create the following process with deny parameters:

→icacls C:\Documents and Settings\\Local Settings\Application Data\595e5c57-6a16-4ce3-b5da-63e1ccaec198″ /deny *S-1-1-0:(OI)(CI)(DE

To synchronise, .rumba file ransomware may also create and open the mutex RasPbFile.

Upon infection, STOP .rumba ransomware may create the following system files of Windows:

→secur32.dll
shell32.dll
wsock32
ws2_32
comctl32.dll
rasapi32.dll
rtutils.dll
rpcrt4.dll
rasman.dll
c:\windows\system32\msv1_0.dll
sensapi.dll
ntdll.dll
userenv.dll
netapi32.dll
version.dll
wintrust.dll
schannel
urlmon.dll
wininet.dll
c:\windows\system32\mswsock.dll
dnsapi.dll
rasadhlp.dll
hnetcfg.dll
c:\windows\system32\wshtcpip.dll
c:\windows\system32\schannel.dll
clbcatq.dll
kernel32.dll
psapi.dll
rsaenh.dll

Then, the ransomware proceeds to it’s malicious activity of obtaining privileges as an administrator and then using those privileges to drop it’s payload, delete shadow copies, copy information and modify the Windows Registry Editor.

Once infected your computer, the .rumba files virus may drop It’s payload files in the following Windows directories;

  • %Windows%
  • %AppData%
  • %Local%
  • %LocalLow%
  • %Roaming%
  • %Temp%

Once having done that, the .rumba ransomware ma also drop it’s ransomware note file, which is believed to look like the following:

———————————————- ALL YOUR FILES ARE ENCRYPTED ———————————————–

Don’t worry, you can return all your files!
All your files documents, photos, databases and other important are encrypted with strongest encryption and unique key.
The only method of recovering files is to purchase decrypt tool and unique key for you.
This software will decrypt all your encrypted files.
What guarantees do we give to you?
You can send one of your encrypted file from your PC and we decrypt it for free.
But we can decrypt only 1 file for free. File must not contain valuable information
Don’t try to use third-party decrypt tools because it will destroy your files.
Discount 50% available if you contact us first 72 hours.

—————————————————————————————————————————

To get this software you need write on our e-mail:

Reserve e-mail address to contact us:

Your personal ID:
[redacted 43 alphanumeric chars]

In addition to doing those activities, the .rumba files virus may also modify the Run and RunOnce Windows sub-keys on the computers of victims:

→ HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce

Furthermore, the .rumba files virus may also delete the shadow copies on the victim computer by running the following commands as an administrator:

→ sc stop VVS
sc stop wscsvc
sc stop WinDefend
sc stop wuauserv
sc stop BITS
sc stop ERSvc
sc stop WerSvc
cmd.exe /C bcdedit /set {default} recoveryenabled No
cmd.exe /C bcdedit /set {default} bootstatuspolicy ignoreallfailures
C:\Windows\System32\cmd.exe” /C vssadmin.exe Delete Shadows /All /Quiet

.rumba Ransomware – Encryption Process

For the .rumba files virus to encrypt the files on the compromised computer, the ransomware virus may first do a system scan of the files themselves. This scan will allow the virus to detect only the files it is set to encrypt and these files usually turn out to be:

  • Audio files.
  • Image files.
  • Document file types.
  • Video files.
  • Archives.
  • Virutal drives.

The .rumba files virus may begin to encrypt the files, by overwriting data blocks from their original structure. This makes the files unable to be opened and starting to appear like the image below shows:

Remove .rumba Files Virus and Try to Decrypt Your Files

If you want to remove the .rumba files virus, we suggest that you use the removal instructions underneath this article. They have been created to provide assistance to you in manually finding out and removing the malicious files of the .rumba ransowmare. But if manual removal does not seem to help, for maximume effectivness, we would suggest that you remove this virus using an anti-malware software, like most cyber-security experts would do. Such software aims to identify and delete all of the malicious objects, related to .rumba file ransomware from your computer and make sure to protect your computer in real time as well.

Fortunately, there is a decryption available for all the files, encrypted by most of the STOP ransomware variants and if the .rumba variant is part of the STOP ransomware, we would strongly recommend that you see the decryption tool for STOP ransomware if you want to restore your files. It is available on the following decryption tool link. Remember that for the decryption, you would eventually need to have one original file and it’s encrypted analogue file, so that you can decrypt all of your files this way.

Note! Your computer system may be affected by .rumba Files Virus and other threats.
Scan Your PC with SpyHunter
SpyHunter is a powerful malware removal tool designed to help users with in-depth system security analysis, detection and removal of threats such as .rumba Files Virus.
Keep in mind, that SpyHunter’s scanner is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter’s malware removal tool to remove the malware threats. Read our SpyHunter 5 review. Click on the corresponding links to check SpyHunter’s EULA, Privacy Policy and Threat Assessment Criteria.

To remove .rumba Files Virus follow these steps:

1. Boot Your PC In Safe Mode to isolate and remove .rumba Files Virus files and objects
2. Find files created by .rumba Files Virus on your PC

IMPORTANT!
Before starting the Automatic Removal below, please boot back into Normal mode, in case you are currently in Safe Mode.
This will enable you to install and use SpyHunter 5 successfully.

Use SpyHunter to scan for malware and unwanted programs

3. Scan for malware and unwanted programs with SpyHunter Anti-Malware Tool
4. Try to Restore files encrypted by .rumba Files Virus

Ventsislav Krastev

Ventsislav has been covering the latest malware, software and newest tech developments at SensorsTechForum for 3 years now. He started out as a network administrator. Having graduated Marketing as well, Ventsislav also has passion for discovery of new shifts and innovations in cybersecurity that become game changers. After studying Value Chain Management and then Network Administration, he found his passion within cybersecrurity and is a strong believer in basic education of every user towards online safety.

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1 Comment

  1. Marcio Cassiano

    Dear,
    I would like to know if already decrypted file contaminated by RUMBA, for ID: ILVB810gCvHGkaDADuTbmq3dQsdSXyZT2bsuUicnV.

    Reply

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