RANSOM_HIDDENTEARMAGIC.A

 Analysis by: Rheniel Rhay Ramos

 ALIASES:

Ransom.HiddenTear.Generic (Malwarebytes); Ransomware-FTD!11363B4CAD63 (McAfee); Ransom:MSIL/Ryzerlo.A (Microsft)

 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.

It connects to certain websites to send and receive information.

It encrypts files with specific file extensions. It encrypts files found in specific folders. It drops files as ransom note.

  TECHNICAL DETAILS

File Size:

220,160 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

16 Oct 2017

Payload:

Connects to URLs/IPs, Downloads files, 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.

Installation

This Ransomware drops the following copies of itself into the affected system:

  • C:\{User Name}\Rand123\local.exe

It creates the following folders:

  • C:\{User Name}\Rand123\

Other System Modifications

This Ransomware sets the system's desktop wallpaper to the following image:

Download Routine

This Ransomware connects to the following URL(s) to download its component file(s):

  • https://{BLOCKED}r.com/qfo4rrZ.jpg

It saves the files it downloads using the following names:

  • C:\{User Name}\ransom.jpg -> used as wallpaper

Other Details

This Ransomware connects to the following URL(s) to check for an Internet connection:

  • https://www.google.com

It connects to the following website to send and receive information:

  • http://www.{BLOCKED}e.com/Server/write.php?computer_name={Computer Name}&userName={User Name}&password={Encryption Key}&allow=ransom

Ransomware Routine

This Ransomware encrypts files with the following extensions:

  • .txt
  • .jar
  • .exe
  • .dat
  • .contact
  • .settings
  • .doc
  • .docx
  • .xls
  • .xlsx
  • .ppt
  • .pptx
  • .odt
  • .jpg
  • .png
  • .csv
  • .py
  • .sql
  • .mdb
  • .sln
  • .php
  • .asp
  • .aspx
  • .html
  • .htm
  • .xml
  • .psd
  • .pdf
  • .dll
  • .c
  • .cs
  • .mp3
  • .mp4
  • .f3d
  • .dwg
  • .cpp
  • .zip
  • .rar
  • .mov
  • .rtf
  • .bmp
  • .mkv
  • .avi
  • .apk
  • .lnk
  • .iso
  • .7-zip
  • .ace
  • .arj
  • .bz2
  • .cab
  • .gzip
  • .lzh
  • .tar
  • .uue
  • .xz
  • .z
  • .001
  • .mpeg
  • .mp3
  • .mpg
  • .core
  • .crproj
  • .pdb
  • .ico
  • .pas
  • .db
  • .torrent

It encrypts files found in the following folders:

  • %Desktop%
  • %User Profile%\Links
  • %User Profile%\Contacts
  • %User Profile%\Documents
  • %User Profile%\Downloads
  • %User Profile%\Pictures
  • %User Profile%\Music
  • %User Profile%\OneDrive
  • %User Profile%\Saved Games
  • %User Profile%\Favorites
  • %User Profile%\Searches
  • %User Profile%\Videos

(Note: %Desktop% is the desktop folder, where it usually is C:\Documents and Settings\{user name}\Desktop in Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\Desktop in Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

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

  • .locked

It drops the following file(s) as ransom note:

  • %Desktop%\READ_IT.txt.locked

(Note: %Desktop% is the desktop folder, where it usually is C:\Documents and Settings\{user name}\Desktop in Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\Desktop in Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

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

  • This computer has been hacked
    I tuoi dati personali sono stati cifrati.Saranno irrecuperabili fino al pagamento del riscatto...inutile che tu perda tempo a cercare a decriptare i file.. Solo io posso farlo ora segui questi passaggi per riaverli indietro 1 Vai sul sito https://localbitcoins.com/ 2 cerca un venditore di bitcoin 3 paga all indirizzo 1KFgiGhrGMzF2Tqxgvi8UvmNa2GixXRKX8 la cifra di euro 100 se non sai cosa sono i bitcoin leggi qua https://www.focusjunior.it/tecnologia/bitcoin-cosa-sono-e-come-funzionano o guarda questo https://www.youtube.com/watch?v=g72aeVoOGLg appena effettui il pagamento riceverai la chiave per decifrare i dati e portai riavere i dati... tutti i dati si distruggeranno per sempre entro 48 ore
    Buona fortuna THE MAGIC :')

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

13.726.05

FIRST VSAPI PATTERN DATE:

18 Oct 2017

VSAPI OPR PATTERN File:

13.727.00

VSAPI OPR PATTERN Date:

19 Oct 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 folder

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.  
  • C:\{User Name}\

Step 4

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.
  • %Desktop%\READ_IT.txt.locked

Step 5

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