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RANSOM_HIDDENTEARRUBY.A

May 16, 2017
 Analysis by: Marvelous Pelin
 ALIASES:

Ransom.HiddenTear!g1(Symantec); Ransom.Ruby(Malwarebytes)

 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:

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 encrypts files with specific file extensions.

  TECHNICAL DETAILS

File Size:

13,312 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

01 May 2017

Payload:

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.

Information Theft

This Ransomware gathers the following data:

  • Computer Name

Stolen Information

This Ransomware sends the gathered information via HTTP POST to the following URL:

  • https://{BLOCKED}.{BLOCKED}.1.6:1337/deposit

Ransomware Routine

This Ransomware encrypts files with the following extensions:

  • .asp
  • .aspx
  • .csv
  • .doc
  • .docx
  • .html
  • .jpg
  • .mdb
  • .odt
  • .php
  • .png
  • .ppt
  • .pptx
  • .psd
  • .sln
  • .sql
  • .txt
  • .xls
  • .xlsx
  • .xml

It renames encrypted files using the following names:

  • {original filename and extension}.ruby

NOTES:

It displays the following after execution:

It displays the following message box after clicking the first button:

It displays the following message box after clicking the second button:

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

13.376.01

FIRST VSAPI PATTERN DATE:

01 May 2017

VSAPI OPR PATTERN File:

13.377.00

VSAPI OPR PATTERN Date:

02 May 2017

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

Scan your computer with your Trend Micro product to delete files detected as RANSOM_HIDDENTEARRUBY.A. 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.

Step 3

Restore encrypted files from backup.


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