Kappa Ransomware

Posted: August 21, 2017
Threat Metric
Threat Level: 10/10
Infected PCs 34

Kappa Ransomware Description

The Kappa Ransomware is a version of Hidden Tear based on the OXAR Ransomware branch. Its attacks can encrypt media on the victim's C drive, and Windows account folders particularly and create interactive pop-ups asking you to pay money to decrypt them. Other unlocking methods always should be attempted before paying a con artist for data recovery, and most versions of Hidden Tear are compatible with free decryption software. Anti-malware products can help you protect your PC by uninstalling the Kappa Ransomware or blocking this threat when it's installing itself.

Japanese Demons Dragging Your Files in Their River

Despite Hidden Tear's being an easily identified threat with only a few features for attacking a PC, threat actors remain obstinate about using it as a primary basis for the code of their campaigns. One of the newer versions that malware experts have identified appears to a production of the OXAR Ransomware's toolkit, with limited programming knowledge evidenced by the author. The new Trojan in question, the Kappa Ransomware, wields the full encryption capabilities of the HT family, but also comes with drawbacks that could help victims circumvent the file damage.

The Japanese mythology-named the Kappa Ransomware is a .NET Framework Trojan that can install itself within most Windows environments. When running, the Trojan tries to encrypt all media on the victim's PC, using a white list format for attacking content such as documents, pictures or databases. Malware experts can confirm a hard-coded configuration setting in this attack that prevents the Kappa Ransomware's attack from working, if the Windows OS is on a drive other than C. If it does succeed, you can identify the encrypted and locked media by the '.OXR' extensions the Kappa Ransomware adds to their names.

The Kappa Ransomware also includes some basic C&C networking communications for transmitting infection statistics and can generate an HTA pop-up. This window displays the threat actor's ransoming demands for helping you recover your files: a set amount of Bitcoins to transfer to the provided wallet address. Current builds of the Kappa Ransomware contain 'placeholder' data for these fields, depriving any victims of the ability to pay for decryption, even though the encryption feature is working.

Stopping Your Files from Turning into Drowned Rats

Japan's kappa demon is sometimes a whimsical piece of imagery but sees use in warning signs about the dangers of swimming in unsafe areas typically. Similarly, the Kappa Ransomware, while being based on one of the least sophisticated families of file-encrypting threats, is no less capable than more advanced Trojans of causing file damage that can be difficult or impossible to cure. Since encryption ciphers aren't always breakable, all PC users should protect their media by backing it up to a safe place that Trojans can't compromise. Freeware decryption software for the Hidden Tear family also may provide possible recovery options for the Kappa Ransomware's victims.

Malware analysts can only confirm in-development builds of the Kappa Ransomware and see no current use of infection vectors for distributing it. Threat actors often prefer attaching installers for threats like the Kappa Ransomware to spam e-mails, although other techniques, from bundled torrents to exploit kits and brute-force attacks, also are possibilities. Like most versions of Hidden Tear, anti-malware programs of major brands are capable of identifying and deleting the Kappa Ransomware at any phase of its attempted installation or afterward.

The Kappa Ransomware's threat actor may never return to this project and leave the Trojan as a half-finished piece of threatening software. On the other hand, even a crippled Kappa Ransomware is a genuine file encryptor, which may make a case for the value of avoiding the default locations for your Windows installations.

Use SpyHunter to Detect and Remove PC Threats

If you are concerned that malware or PC threats similar to Kappa Ransomware may have infected your computer, we recommend you start an in-depth system scan with SpyHunter. SpyHunter is an advanced malware protection and remediation application that offers subscribers a comprehensive method for protecting PCs from malware, in addition to providing one-on-one technical support service.

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Why can't I open any program including SpyHunter? You may have a malware file running in memory that kills any programs that you try to launch on your PC. Tip: Download SpyHunter from a clean computer, copy it to a USB thumb drive, DVD or CD, then install it on the infected PC and run SpyHunter's malware scanner.

Technical Details

File System Modifications

Tutorials: If you wish to learn how to remove malware components manually, you can read the tutorials on how to find malware, kill unwanted processes, remove malicious DLLs and delete other harmful files. Always be sure to back up your PC before making any changes.

The following files were created in the system:

file.exe File name: file.exe
Size: 266.75 KB (266752 bytes)
MD5: b674fd0512212b07a1dd529622d5d6f5
Detection count: 60
File type: Executable File
Mime Type: unknown/exe
Group: Malware file
Last Updated: August 23, 2017
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