NoValid Ransomware
Threat Scorecard
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See also Threat Assessment Criteria.
| Threat Level: | 10 % (Normal) |
| Infected Computers: | 223 |
| First Seen: | December 5, 2016 |
| Last Seen: | January 28, 2023 |
| OS(es) Affected: | Windows |
The NoValid Ransomware is a ransomware Trojan that is used to take the victims' files hostage. The NoValid Ransomware can be identified easily because of its ransom note, which is named RESTORE_the NoValid_FILES.HTML. The full contents of the NoValid Ransomware's ransom message are listed below:
'LOCKED-IN
Danger! ALL YOUR FILES HAS BEEN LOCKED
All your files are encrypted and can be restored after payment. For encryption, we used persistent improved algorithm AES256. For each file generated a unique decryption key and added a random number which makes decryption impossible without the use of a special configuration file which has ll the information needed to decrypt your files.'
Like most ransomware Trojans, the NoValid Ransomware makes the victim's files inaccessible through the use of an encryption algorithm, and then demands payment of a ransom. The ransom that the NoValid Ransomware demands is between 0.5 and 1 BitCoin (approximately $400 to $800 USD), depending on the extent of the affected files on the victim's computer.
Table of Contents
The NoValid Ransomware Infection is Very Effective
The NoValid Ransomware Trojan was first reported to PC security analysts in December 2016. The NoValid Ransomware receives its name because the files that are encrypted by this attack will have the extension '.NoValid' added to their file names. The NoValid Ransomware has been used in attacks both on Web servers and on individual computer users. In most cases, the NoValid Ransomware is distributed by phishing emails that have file attachments using corrupted macro scripts to download and install the NoValid Ransomware. PC security analysts have observed the use of direct hacking methods to deliver the NoValid Ransomware to the targeted computer directly. This particular attack method is used to infiltrate Web servers that have poorly implemented security.
Some Details of the NoValid Ransomware Attack
The NoValid Ransomware uses the AES 256 encryption to encrypt the victim's files, making it nearly impossible to recover the affected files without the needed decryption key. Currently, there is no available way to recover the files that were encrypted by the NoValid Ransomware. The NoValid Ransomware will target commonly used files and is designed to force computer users to pay by targeting files that could be difficult to replace because of valuable professional or personal content (such as family photos or projects for school or work). During its attack, the NoValid Ransomware swill search for files with the following extensions (among others) and encrypt them using its encryption algorithm:
.txt, .exe, .doc, .docx, .xls, .index, .pdf, .zip, .rar, .css, .lnk, .xlsx, .ppt, .pptx, .odt, .jpg, .bmp, .png, .csv, .sql, .mdb, .sln, .php, .asp, .aspx, .html, .xml, .psd, .bk, .bat, .mp3, .mp4, .wav, .wma, .avi, .divx, .mkv, .mpeg, .wmv, .mov, .ogg.
Dealing with the NoValid Ransomware Involves Preparation
As with most ransomware Trojans, the best protection against the NoValid Ransomware attack is to be prepared. PC security researchers strongly advise computer users to have backups of all files and keep these backups updated. Although anti-malware software can detect and remove the NoValid Ransomware, once the attack has been carried out, the victim's files will remain encrypted. This is why having a backup is so important when dealing with attacks like the NoValid Ransomware. The people responsible for the NoValid Ransomware attack have nothing if the victim can simply recover the files from the backup. Today, external memory devices and cloud storage are plentiful and very inexpensive (and in many cases free). Because of this, there is no reason why computer users should not have some form of backup to protect the files that they consider irreplaceable or especially important. The cost of recovering from a NoValid Ransomware attack can be quite elevated, especially when compared with the cost of prevention. To prevent the NoValid Ransomware infection, in the first place, PC security analysts also recommend computer users to be especially cautious when handling unsolicited email attachments and embedded links, even if they appear to come from a known email contact.
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