Analysis by: John Anthony Banes
ALIASES:

Ransom.Tox (Norton); Win32/Filecoder.Meteoritan.A trojan (NOD32); Ransom:Win32/FileCryptor (Microsoft)

 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, Downloaded from the Internet

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.

  TECHNICAL DETAILS

File Size: 1,066,618 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 22 Mar 2017
Payload: Encrypts files, Drops 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.

Dropping Routine

This Ransomware drops the following files:

  • {malware path}\readme_your_files_have_been_encrypted.txt - ransom note
  • {malware path}\where_are_your_files.txt - ransom note
  • {malware path}\METEORITAN.POLAND - ID
  • {malware path}\METEORITAN.RAMSOM - password

NOTES:

This ransomware does not encrypt any file in your computer, instead the following ransom note will be displayed:

The file METEORITAN.RAMSOM contains the key.

If the key entered is incorrect, it displays this message:

If the key entered is correct, it displays this message and deletes its dropped files:

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 13.294.03
FIRST VSAPI PATTERN DATE: 23 Mar 2017
VSAPI OPR PATTERN File: 13.295.00
VSAPI OPR PATTERN Date: 24 Mar 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

Search and delete this file

[ Learn More ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.  
  • {malware path}\readme_your_files_have_been_encrypted.txt
  • {malware path}\where_are_your_files.txt
  • {malware path}\METEORITAN.POLAND
  • {malware path}\METEORITAN.RAMSOM

Step 4

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


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