Analysis by: Jeanne Jocson
 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel: Dropped by other malware, Downloaded from the Internet

This Trojan 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: 10,752 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 16 Oct 2015
Payload: Displays message/message boxes, Encrypts files

Arrival Details

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

NOTES:

This ransomware displays the following GUI:

It accepts any string in the first text box and displays a code in the form of a message box when "Get Code" button was clicked:

The code shown in the message box can be any of the following:

  • BQWER1234
  • GQWER7890
  • FYUIO1234

The ransomware displays the following error message when "Get Code" button was clicked and no string was entered in the first text box:

It displays the following message box when "Unlock" button was clicked and the correct code was entered in the second text box and then said box was terminated:

It accepts codes which can be any of the following mentioned above.

If wrong code was entered, the ransomware will display the following error message when "Unlock" button was clicked:

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 12.844.02
FIRST VSAPI PATTERN DATE: 18 Oct 2016
VSAPI OPR PATTERN File: 12.845.00
VSAPI OPR PATTERN Date: 19 Oct 2016

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

Identify and terminate files detected as RANSOM_FAKELOCK.F

[ Learn More ]
  1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 3

Scan your computer with your Trend Micro product to delete files detected as RANSOM_FAKELOCK.F. 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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