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Cuzimvirus Ransomware

Posted: October 31, 2016

Threat Metric

Threat Level: 8/10
Infected PCs: 49
First Seen: October 27, 2016
OS(es) Affected: Windows

The Cuzimvirus Ransomware is a Trojan that blocks your access to the desktop and other parts of the Windows UI, including other programs and files. While doing so, the Cuzimvirus Ransomware displays instructions on contacting its administrators via e-mail, through which ransom negotiations proceed. Like all cases of threats disrupting your PC access, you should counteract this threat by using a secure boot sequence and deleting the Cuzimvirus Ransomware through a dedicated anti-malware service.

Seeing Red in More Ways than One

Even as file-encoding attacks have become more commonplace in the last two years, Trojans continue supplementing them with other attacks, many of which are just as impairing as losing access to your hard drive's contents. The Cuzimvirus Ransomware is a simple, self-contained showcase of such functions that malware experts often see coming alongside threatening file encryption. In the Cuzimvirus Ransomware's case, the screen-locking function supplants file-encoding as the primary feature of its payload.

After it initializes, the Cuzimvirus Ransomware generates an advanced HTML pop-up window with a simple, red background. Although this window may not take up the entire screen, the Cuzimvirus Ransomware prevents the victim from closing it by intercepting mouse clicks with a series of IF-ELSE statements. In response, it returns an 'INVAILD CODE!' error (seemingly a typo).

The actual pop-up message asks the victims to contact the Cuzimvirus Ransomware's e-mail address to send an ID code to help unlock their PCs but makes no mention of any ransom. This minor social engineering ploy is in use in some, recent threat campaigns where the threat actor doesn't intend to offer any forewarning of the fact that unlocking your PC isn't free.

Getting the Cuzimvirus out of Your System

Although its self-bestowed title of the Cuzimvirus may be intimidating, the Cuzimvirus Ransomware is not classifiable as being a proper virus adequately, under the terms of commonly-defined threats. Malware experts see no self-distributing features in the current release of the Cuzimvirus Ransomware. Even more importantly, they also see major vulnerabilities in its system lock-down attack.

Unlike almost all competing screen lockers and file encoder Trojans, the Cuzimvirus Ransomware doesn't use obfuscated code to protect its unlocking key sufficiently. The Cuzimvirus Ransomware also uses a hard-coded key, rather than a dynamically-generated one that would vary between multiple infections. Entering the string 'Unlock' in the first field, and '16wsmc51Ktxcvl3' in the second field, should unlock your desktop. If the Cuzimvirus Ransomware is updated to patch these oversights, malware experts recommend booting into Safe Mode as an alternate means of avoiding the pop-up to let your anti-malware tools delete the Cuzimvirus Ransomware.

The Cuzimvirus Ransomware is not a very advanced threat necessarily, but for PC users not informed on ways of fighting its attacks, it can be just as formidable as a much more well-designed Trojan than itself.

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