Analysis by: Pearl Charlaine Espejo
ALIASES:

Ransom:HTML/Crowti.B (Microsoft)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan may be dropped by other malware.

  TECHNICAL DETAILS

File Size: Varies
File Type: HTML, HTM
Memory Resident: No
Initial Samples Received Date: 04 Dec 2015

Arrival Details

This Trojan may be dropped by other malware.

NOTES:

This is the detection for ransom note HTML files dropped by TROJ_CRYPWALL or RANSOM_CRYPWALL family.

  SOLUTION

Minimum Scan Engine: 9.8
FIRST VSAPI PATTERN FILE: 12.190.04
FIRST VSAPI PATTERN DATE: 04 Dec 2015
VSAPI OPR PATTERN File: 12.191.00
VSAPI OPR PATTERN Date: 05 Dec 2015

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

Close all opened browser windows

Step 3

Scan your computer with your Trend Micro product to delete files detected as HTML_WALLNOTE.F. 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 this Knowledge Base page for more information.


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