Analysis by: Leidryn Saludez
ALIASES:

Win64:MalwareX-gen [Trj] (AVAST)

 PLATFORM:

Windows

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

  • Threat Type: Ransomware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

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

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: 3,562,496 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 16 Sep 2024
Payload: Connects to URLs/IPs, Encrypts files

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.

Installation

This Ransomware drops the following files:

  • %User Temp%\wintemp.{Random}\local state

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Information Theft

This Ransomware gathers the following data:

  • Victim's IP address

Other Details

This Ransomware connects to the following URL(s) to get the affected system's IP address:

  • http://{BLOCKED}ig.me

It does the following:

  • Uses Discord Webhooks to send the gathered information to the attacker's Discord Server

Ransomware Routine

This Ransomware avoids encrypting files found in the following folders:

  • AppData
  • ProgramData
  • Program Files
  • Program File(x86)
  • Local Settings\Temp

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 19.596.03
FIRST VSAPI PATTERN DATE: 06 Aug 2024
VSAPI OPR PATTERN File: 19.597.00
VSAPI OPR PATTERN Date: 07 Aug 2024

Step 1

Trend Micro Predictive Machine Learning detects and blocks malware at the first sign of its existence, before it executes on your system. When enabled, your Trend Micro product detects this malware under the following machine learning name:

Step 2

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.

Step 3

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 4

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.
  • AppData
  • ProgramData
  • Program Files
  • Program File(x86)
  • Local Settings\Temp

Step 5

Scan your computer with your Trend Micro product to delete files detected as Ransom.Win64.CRYSTALOCK.THIAGBD. 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:


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