Analysis by: Leidryn Saludez
ALIASES:

Trojan-Ransom.FileCrypter (IKARUS)

 PLATFORM:

Windows

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

  • Threat Type: Ransomware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Canal de infección 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.

It drops files as ransom note.

  TECHNICAL DETAILS

Tamaño del archivo 9,256 bytes
Tipo de archivo PHP
Residente en memoria No
Fecha de recepción de las muestras iniciales 03 Apr 2025
Carga útil Encrypts files, Connects to URLs/IPs

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.

Other Details

This Ransomware connects to the following possibly malicious URL:

  • https://{BLOCKED}in.com/xfsaxi82

Ransomware Routine

This Ransomware avoids encrypting files with the following strings in their file path:

  • .htaccess
  • .FS
  • Dragon_Readme.html
  • Readme.html
  • rans

It appends the following extension to the file name of the encrypted files:

  • .FS

It drops the following file(s) as ransom note:

  • {Encrypted Directory}\Dragon_Readme.html → ransom note content is retrieved from a Pastebin URL

  SOLUTION

Motor de exploración mínimo 9.800
Primer archivo de patrones de VSAPI 20.120.02
Primera fecha de publicación de patrones de VSAPI 03 Apr 2025
Versión de patrones OPR de VSAPI 20.121.00
Fecha de publicación de patrones OPR de VSAPI 04 Apr 2025

Step 1

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 2

Scan your computer with your Trend Micro product to delete files detected as Ransom.PHP.DRAKONLOCK.THDOCBE. 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 3

Restore encrypted files from backup.


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