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RANSOM_HIDDERNTEARMINE.A

December 27, 2017
 Analysis by: Rheniel Rhay Ramos
 ALIASES:

MSIL/Filecoder.KX (ESET-NOD32); Trojan-Ransom.Win32.Crypmodadv.xos (Kaspersky); Ransom.RansomMine (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. It encrypts files found in specific folders.

  TECHNICAL DETAILS

File Size:

182,784 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

06 Dec 2017

Payload:

Encrypts files

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 displays a pop-up window with the following message:


It does the following:

  • Clicking the button in the window displays all the files that the ransomware has encrypted.

Ransomware Routine

This Ransomware encrypts files with the following extensions:

  • .txt
  • .jpg
  • .png
  • .zip
  • .egg
  • .alz
  • .mp3
  • .mp4
  • .wav
  • .hwp
  • .pptx
  • .pub
  • .xlsx
  • .docx
  • .accdb
  • .java
  • .class
  • .gmx
  • .gif
  • .max
  • .mdx
  • .m3
  • .vbs
  • .rar
  • .dds
  • .blp
  • .ico

It encrypts files found in the following folders:

  • %UserProfile%

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

  • .RansomMine

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

13.822.05

FIRST VSAPI PATTERN DATE:

02 Dec 2017

VSAPI OPR PATTERN File:

13.823.00

VSAPI OPR PATTERN Date:

03 Dec 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

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Identify and terminate files detected as RANSOM_HIDDERNTEARMINE.A

[ Learn More ]
  1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 4

Scan your computer with your Trend Micro product to delete files detected as RANSOM_HIDDERNTEARMINE.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 the following Trend Micro Support pages for more information:

Step 5

Restore encrypted files from backup.


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