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Ransom.Win32.STRIKED.B

October 30, 2018
 Analysis by: Robert Nicole Malagad
 PLATFORM:

Windows

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

  • Threat Type: Ransomware

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW


This Ransomware arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It steals email account information. It steals system information.

It connects to certain websites to send and receive information. It is capable of encrypting files in the affected system.

  TECHNICAL DETAILS

File Size:

5,795,377 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

12 Jul 2017

Payload:

Steals information, Connects to URLs/IPs, Terminates processes, Displays message/message boxes, Encrypts files

Arrival Details

This Ransomware arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

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

Installation

This Ransomware drops the following files:

  • {Encrypted File Directory}\README_DECRYPT.html

Information Theft

This Ransomware steals email account information.

It steals system information.

Other Details

This Ransomware connects to the following website to send and receive information:

  • http://{BLOCKED}.{BLOCKED}.83.47/genree.php
  • http://{BLOCKED}.{BLOCKED}.231.201:3129
  • http://{BLOCKED}.{BLOCKED}.146.153:8080
  • http://{BLOCKED}.{BLOCKED}.246.144:8080
  • http://{BLOCKED}.{BLOCKED}.132.75:8080
  • http://{BLOCKED}.{BLOCKED}.216.134:80
  • http://{BLOCKED}.{BLOCKED}.216.135:80
  • http://{BLOCKED}.{BLOCKED}.171.51:800
  • http://{BLOCKED}.{BLOCKED}.136.34:80
  • http://{BLOCKED}.{BLOCKED}.136.34:8080
  • http://{BLOCKED}.{BLOCKED}.136.34:81
  • http://{BLOCKED}.{BLOCKED}.17.132:8081
  • http://{BLOCKED}.{BLOCKED}.9.136:80
  • http://{BLOCKED}.{BLOCKED}.94.144:8080
  • http://{BLOCKED}.{BLOCKED}.228.61:8080
  • http://{BLOCKED}.{BLOCKED}.88.120:53281
  • http://{BLOCKED}.{BLOCKED}.242.94:80
  • http://{BLOCKED}.{BLOCKED}.76.30:80
  • http://{BLOCKED}.{BLOCKED}.76.30:8090
  • http://{BLOCKED}.{BLOCKED}.117.243:8080
  • http://{BLOCKED}.{BLOCKED}.83.214:8080
  • http://{BLOCKED}.{BLOCKED}.30.241:80
  • http://{BLOCKED}.{BLOCKED}.151.90:8080
  • http://{BLOCKED}.{BLOCKED}.19.130:8080
  • http://{BLOCKED}.{BLOCKED}.238.10:3128
  • http://{BLOCKED}.{BLOCKED}.238.10:8080
  • http://{BLOCKED}.{BLOCKED}.51.165:8080
  • http://{BLOCKED}.{BLOCKED}.246.26:3128
  • http://{BLOCKED}.{BLOCKED}.0.244:8080
  • http://{BLOCKED}.{BLOCKED}.0.245:80
  • http://{BLOCKED}.{BLOCKED}.234.43:8080
  • http://{BLOCKED}.{BLOCKED}.61.29:3128
  • http://{BLOCKED}.{BLOCKED}.61.29:80
  • http://{BLOCKED}.{BLOCKED}.61.29:8080
  • http://{BLOCKED}.{BLOCKED}.61.29:8799
  • http://{BLOCKED}.{BLOCKED}.161.28:53281
  • http://{BLOCKED}.{BLOCKED}.94.97:8081
  • http://{BLOCKED}.{BLOCKED}.127.35:8888
  • http://{BLOCKED}.{BLOCKED}.145.9:53281
  • http://{BLOCKED}.{BLOCKED}.226.67:3128
  • http://{BLOCKED}.{BLOCKED}.117.248:53281
  • http://{BLOCKED}.{BLOCKED}.228.244:80
  • http://{BLOCKED}.{BLOCKED}.223.39:8080
  • http://{BLOCKED}.{BLOCKED}.86.134:8081
  • http://{BLOCKED}.{BLOCKED}.251.27:80
  • http://{BLOCKED}.{BLOCKED}.251.70:80
  • http://{BLOCKED}.{BLOCKED}.124.10:8080
  • http://{BLOCKED}.{BLOCKED}.57.139:8080
  • http://{BLOCKED}.{BLOCKED}.16.250:3128
  • http://{BLOCKED}.{BLOCKED}.191.85:8888
  • http://{BLOCKED}.{BLOCKED}.135.184:8080

It does the following:

  • Checks and terminates the running process if any of the following modules are found in its memory:
    • mysql
    • apache
    • mysqld
    • oracle
    • tomcat
    • java
    • backup
    • vnc
    • radmin
    • ftp
    • teamviewer
    • xampp
    • Taskmgr
  • Avoids encrypting files in the following directories:
    • $WINDOWS.~BT
    • Program Files
    • ProgramData
    • Windows Directory
  • It adds a ransom note with the following content:

It is capable of encrypting files in the affected system.

Ransomware Routine

This Ransomware appends the following extension to the file name of the encrypted files:

  • #jekabro@mortalkombat.top#id#{ID Number}

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

14.594.05

FIRST VSAPI PATTERN DATE:

29 Oct 2018

VSAPI OPR PATTERN File:

14.595.00

VSAPI OPR PATTERN Date:

30 Oct 2018

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.Win32.STRIKED.B

[ 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

Search and delete this file

[ Learn More ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.  
  • {Encrypted File Directory}\README_DECRYPT.html

Step 4

Scan your computer with your Trend Micro product to delete files detected as Ransom.Win32.STRIKED.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 the following Trend Micro Support pages for more information:

Step 5

Restore encrypted files from backup.


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