Analysis by: Rheniel Rhay Ramos
 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Ransomware

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel: Downloaded from the Internet

This Ransomware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

  TECHNICAL DETAILS

File Size: 18944 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 02 Jun 2017
Payload: Terminates processes, Displays message/message boxes

Arrival Details

This Ransomware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Process Termination

This Ransomware terminates the following processes if found running in the affected system's memory:

  • taskmgr

Other Details

This Ransomware does the following:

  • It displays the following text when the "KA MAN BLET DARYT!!!" or Instructions Button is pressed:
  • It displays a message box when the "Nu jau Suvedziau ta Koda" or activate button is pressed and the key is incorrect:
  • It also displays a message box if the key is correct:

It locks the screen and displays the following image:

NOTES:

The activation key is mediena.

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 13.446.08
FIRST VSAPI PATTERN DATE: 02 Jun 2017
VSAPI OPR PATTERN File: 13.447.00
VSAPI OPR PATTERN Date: 03 Jun 2017

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Restart in normal mode and scan your computer with your Trend Micro product for files detected as RANSOM_JOSKY.B. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.


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