Curumim Ransomware–Threat In Detail
Curumim is the name of new crypto-malware that is a variant of HiddenTear open-source project and is reported to encrypt files on the victim’s PC. After encrypting the files are locked with “.Curumim” extension which means the files are no more accessible to users. Curumim ransomware leaves a random note in Portuguese language which specifies that it mostly targets Brazil and other Portuguese-speaking countries. The ransom note does not reveal the ransom amount or any additional details of its authors and is just asked the victims to contact to the provided e-mail address “email@example.com” within 1 day of time frame otherwise the files will be lost. In any such case, paying ransom is not recommended and users are urged to try restoring the files through other means.
|Description||Curumim Ransomware encrypts files, videos, images and texts stored on the target PC and demand a ransom amount from users to decode the files.|
|Occurrence||spam mail attachments., exploit kits, malicious links and java script codes..|
|Possible Symptoms||The ransom note can be seen on desktop and other file directories and files could not be accessible.|
|Detection Tool||Download the Detection tool– To confirm attack of Curumim Ransomware virus on your computer.|
Curumim Ransomware is distributed through spam mail attachment as a malicious script containing the payloads of the malware which if executed by the user could install the threat onto the computer system. Many cyber-criminals uses spam techniques to trick users by heading the mail as any invoice or shipment. Other sources might include visiting infected websites containing java script codes, exploit kits and spam bots. As you open the document or click the link, the payloads of Curumim Ransomware gets downloaded on the system and installed without any user’s permission. If the user open/execute this file on their device, then the virus gets installed and your PC will become infected with Curumim file-encrypting Ransomware threat.
More about Curumim Ransomware
Curumim Ransomware is a file-encrypting program that searches for important files on the victim’s PC like MS-Office, PDF, databases, photos and other personal and sensitive data and renders them non-accessible to users. And further ask users to pay the ransom to get the decryption key and unlock the files.
The ransomware changes the windows Registry entries to launch each time the window’s starts and takes up huge system resources to encrypt the files.
The files contains the ransom note and instructions for users on how to contact the authors of the ransomware and get their files back.
The ransom Note says:
Your files are encrypted!
You only have 1 day
To get in touch or your files will be totally lost!
The ransom note by Curumim virus states that your documents has been encrypted and you need to contact with the authors within 1 day to get back your files or files will be lost. The ransom demands varies for the user and the victims should contact with the provided email address as soon as possible.
List of file extension encrypted
→.txt, .doc, .docx, .xls, .xlsx, .pdf, .pps, .ppt, .pptx, .odt, .gif, .jpg, .png, .db, .csv, .sql, .mdb.sln.php, .asp, .aspx, .html, .xml, .psd, .frm, .myd, .myi, .dbf, .mp3, .mp4, .avi, .mov, .mpg, .rm, .wmv, .m4a, .mpa, .wav, .sav, .gam, .log, .ged, .msg, .myo, .tax, .ynab, .ifx, .ofx, .qfx, .qif, .qdf, .tax2013, .tax2014, .tax2015, .box, .ncf, .nsf, .ntf, .lwp
Curumim Ransomware uses AES encryption algorithm to encrypt data and appends random extensions to it. The crypto-malware ensures that the user could be able to recover the files from shadow volume copies, so it deletes the files by executing the command
→vsCurumimmin.exe delete shadows /all /Quiet