Ransom.HTML.CRYTOX.A.note

May 26, 2020
 Analysis by: Paul Steven Nadera
 PLATFORM:

Windows

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

  • Threat Type: Ransomware

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Dropped by other malware

This Ransomware may be dropped by other malware.

  TECHNICAL DETAILS

File Size:

11,456 bytes

File Type:

HTA

Memory Resident:

No

Initial Samples Received Date:

06 May 2020

Payload:

Encrypts files

Arrival Details

This Ransomware may be dropped by the following malware:

  • Ransom.Win64.CRYTOX.A

Ransomware Routine

This Ransomware leaves text files that serve as ransom notes containing the following text:

  • {Encrypted Directory}\ReadMe.hta

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

15.852.08

FIRST VSAPI PATTERN DATE:

06 May 2020

VSAPI OPR PATTERN File:

15.853.00

VSAPI OPR PATTERN Date:

07 May 2020

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.HTML.CRYTOX.A.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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