Gamma Ransomware is file-encrypting virus, categorized as ransomware and belonging to Crysis-Dharma-Cezar family. This is one of the most widespread ransomware families. It got its name due to file extension it adds to encrypted files. Virus uses complex extenion that consists of e-mail adress and unique 8-digit identification number (randomly generated). Gamma Ransomware developers demand from 0.05 to 0.5 BTC (BitCoins) for decryption, but offer to decrypt 1 non-archived file for free. The file should be less than 1 Mb. We recommend you to recover 1 random file, as it can help fo possible decoding in future. Keep the pair of encrypted and decrypted samples. Currently, there is no decryption tools available for Gamma Ransomware, however, we recommend you to use instructions and tools below. Often, users remove copies and duplicates of docmunets, photos, videos – infection may not affect deleted files. Some of removed files can be restored by using file recovery software.
Rapid V3 Ransomware (a.k.a Rapid 3.0 Ransomware) is new iteration of notorious Rapid Ransomware. This version uses AES encryption algorithm and can append following extensions to user files: .no_more_ransom, .ezymn, .rpd, .[5-random-characters]. Currently, there is no decryptor with confirmed working capacity for Rapid V3 Ransomware. However, using backups, recovery software or other advices from this page can help you recover encoded files. Virus uses the same template for ransom note. Some variation create ransom note with name: How Recovery Files.txt. Rapid V3 Ransomware extorts 0,7 BitCoins (BTC) for recovering files from decryption. Users can contact developers using e-mail firstname.lastname@example.org, which is reference to and mockery of a famous security researcher from Bleeping Computer forum, who has nickname “demonslay335”. There is information about the victims from the following countries: USA, Iran, Germany, Japan, Benin, South Korea, Indonesia, Spain, Malaysia, India.
Letsupdateourdomain.com is used for ad serving, pop-ups display and creation of redirects in Google Chrome, Mozilla Firefox and Internet Explorer. If you see Letsupdateourdomain.com advertising on a regular basis, this is clear indication, that your computer is infected with adware. Using browsers, infected with such malwar, becomes real nightmare. Letsupdateourdomain.com may redirect to sites with adult content, gambling sites and online casinos, phishing bank pages or to popular shopping sites like GearBest, Amazon and others. Users should evade clicking malicious ads by all means, as it can lead to disastrous results.
RYUK Ransomware is virulent ransomware threat, based on the code of Hermes 2.1 and BitPaymer viruses. Researchers believe, that famous Lazarus Group is responsible for the development and implementation of the virus. Hackers demand 15-50 BTC for decryption, which is great amount. RYUK Ransomware does not bypass UAC, requires permission to run, which means user granted access to the computer for virus executable file. Ransomware encrypts all files except ones in following folders: “Windows”, “Mozilla”, “Chrome”, “RecycleBin”, “Ahnlab”. Before the onset of destructive activity, malware stops more than 180 services and 40 processes, by using taskkill and net stop commands. Stopped services and processes mainly belong to antivirus software, running databases, software for backup and editing documents that can prevent file encryption.
Dharma virus, unlike similar types of ransomware, does not change desktop background, but creates README.txt or Document.txt.[email@example.com].zzzzz files and places them in each folder with compromised files. Text files contain message stating that users have to pay the ransom using Bitcoins and amount is approximately $300-$500 depending on ransomware version. The private decryption key is stored on a remote server, and there currently impossible to break the encryption of the latest version.