Karo Ransomware

Posted: June 29, 2017
Threat Metric
Threat Level: 10/10
Infected PCs 42

Karo Ransomware Description

The Karo Ransomware is an EDA2-based Trojan that locks your files until you agree to pay its ransom over a TOR website. Malware experts are seeing these attacks targeting business networks via e-mails, and users should monitor any unusual messages or attachments for potential exploits. Although the Trojan's encryption is unbreakable currently, anti-malware products can block its installation or uninstall the Karo Ransomware safely.

A Charge to Your Credit Card that Gets out of Hand

E-mail still is a preferred delivery method for con artists who want to take others' files and hold them hostage for profit. One of the last known campaigns malware experts can verify is a series of attacks using the Karo Ransomware, which is installing itself under the pretense of being an alert about a Mastercard payment. Although the attached file is a document, not a program executable, it includes an embedded, macro-based exploit for installing the Karo Ransomware, once the victim enables it.

The Karo Ransomware further disguises itself with a fake 'svchost.exe' name (which is a default part of Windows) while it encrypts the contents of your PC. Along with encoding documents, pictures, and similar media with an AES cipher, the Karo Ransomware adds the '.ipygh' extensions to all their names swaps out the desktop's background and places an HTML message on your desktop. The note limits itself to advising you to use the TOR Web browser to navigate to the threat actor's ransoming website with a configurable field for the URL.

Once at this site, the user may be asked to pay a cryptocurrency, such as Bitcoin, or another cash-value transaction, in return for getting the code for unblocking their files. However, most attacks using file-encrypting threats like the Karo Ransomware traffic in ransom methods that you can't refund even if you don't receive any decryption services.

Canceling the Worst Kind of Charges

Side features of the Karo Ransomware provide additional details on the entities its threat actors are intent on extorting. Although many file-encoding threats will terminate basic utilities like the Task Manager, the Karo Ransomware includes an auto-termination functionality for programs specific to managing Web servers and databases, such as Microsoft's SQL Server. Unfortunately, the Karo Ransomware's encryption method is relatively secure against third-party deciphering. Potentially, users could try to restore a default backup of the key that the Trojan saves to '%APPDATA%\aes' location, similar to other versions of EDA2.

Backups always are safer recovery solutions for damaged content than paying a threat actor who may or may not abide by any agreements. Since Windows default backups are at high-risk of deletion, malware experts encourage using backups that you save to another device or cloud service whenever possible. Updating your anti-malware protection also may be crucial to deleting the Karo Ransomware in time, which is evading many brands of threat detection successfully.

A lot of peril can come out of a little document, especially one that, like the Karo Ransomware's delivery vehicles, includes embedded exploits. If you're asked to enable extra word-processing features, the chances are higher than you'd think that the content is more than just some text.

Use SpyHunter to Detect and Remove PC Threats

If you are concerned that malware or PC threats similar to Karo 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.

Download SpyHunter's Malware Scanner

Note: SpyHunter's free version is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter's malware tool to remove the malware threats. Learn more on SpyHunter. If you would like to uninstall SpyHunter for any reason, please follow these uninstall instructions. To learn more about our policies and practices, visit our EULA, Privacy Policy and Threat Assessment Criteria.

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:

dirkaro.exe File name: karo.exe
Size: 720.38 KB (720384 bytes)
MD5: c7097d3840f3bdc47edfbd578733f444
Detection count: 98
File type: Executable File
Mime Type: unknown/exe
Path: dir
Group: Malware file
Last Updated: June 30, 2017
dirsvchost.exe File name: svchost.exe
Size: 608.76 KB (608768 bytes)
MD5: 6409545619c0bc92ff486a73407279ce
Detection count: 80
File type: Executable File
Mime Type: unknown/exe
Path: dir
Group: Malware file
Last Updated: June 30, 2017

More files

Home Malware Programs Ransomware Karo Ransomware

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