Ransom.Win32.CRYPTESLA.T.note

December 13, 2023
 Analysis by: Neljorn Nathaniel Aguas
 ALIASES:

W32/Filecoder.CRYPTPROJECTXXX!tr (FORTINET)

 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. It may be dropped by other malware.

This is the Trend Micro detection for files that exhibit certain behaviors.

  TECHNICAL DETAILS

File Size:

1,758 bytes

File Type:

TXT

Memory Resident:

No

Initial Samples Received Date:

12 Dec 2023

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.

It may be dropped by the following malware:

  • CRYPTESLA ransomware family

Other Details

This is the Trend Micro detection for:

  • Ransom note dropped by CRYPTESLA malware family

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

18.874.04

FIRST VSAPI PATTERN DATE:

12 Dec 2023

VSAPI OPR PATTERN File:

18.875.00

VSAPI OPR PATTERN Date:

13 Dec 2023

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.Win32.CRYPTESLA.T.note. 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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