Although Dridex (W32.Cridex) and Locky (Trojan.Cryptolocker.AF) have been unusually quiet,
a new type of ransomware may be taking their place on the online threat
landscape. Bart, a new ransomware variant, introduced by the same
cybercriminal group behind Dridex and Locky, was spotted late last week.
ProofPoint researchers recently observed a large malware campaign distributing .zip attachments — mostly labeled as photos, images, or pictures — that contained JavaScript code (JS.Nemucod). Once opened, the attachments download and install RockLoader (Downloader.Zirchap) malware, which in turn downloads the Bart ransomware.
Bart then encrypts files with certain extensions on compromised computers. It displays its ransom note through a text file and the desktop wallpaper. Then the ransomware demands payment from the victim, promising that the encrypted files will then be decrypted.
ProofPoint researchers recently observed a large malware campaign distributing .zip attachments — mostly labeled as photos, images, or pictures — that contained JavaScript code (JS.Nemucod). Once opened, the attachments download and install RockLoader (Downloader.Zirchap) malware, which in turn downloads the Bart ransomware.
Bart then encrypts files with certain extensions on compromised computers. It displays its ransom note through a text file and the desktop wallpaper. Then the ransomware demands payment from the victim, promising that the encrypted files will then be decrypted.
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