RANSOM_HIDDENTEARRABLOCK.A
Ransom:MSIL/Ryzerlo.A(Microsoft)
Windows
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Ransomware
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
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
214,528 bytes
EXE
No
12 Jun 2017
Connects to URLs/IPs, 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 files:
- %User Profile%\WindowsOverride.txt
- %Desktop%\LEES_MIJ.txt - ransom note
(Note: %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.. %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:
Information Theft
This Ransomware gathers the following data:
- Computer Name
- Username
Stolen Information
This Ransomware sends the data it gathers to the following email addresses via SMTP:
- {BLOCKED}e.vdb@mail.com
Ransomware Routine
This Ransomware encrypts files with the following extensions:
- .7z
- .asp
- .aspx
- .bak
- .csv
- .dbf
- .doc
- .docx
- .exe
- .flv
- .gam
- .gif
- .html
- .iso
- .jpeg
- .jpg
- .mdb
- .mp3
- .odt
- .php
- .php
- .png
- .ppt
- .pptx
- .psd
- .rar
- .sln
- .sql
- .sys
- .tmp
- .torrent
- .txt
- .vmw
- .wav
- .xls
- .xlsx
- .xml
- .zip
- mp4
It encrypts files found in the following folders:
- %Desktop%
- %User Profile%\Videos
- %User Profile%\Downloads
- %User Profile%\Pictures
(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 renames encrypted files using the following names:
- {original filename and extension}.R4bb0l0ck
SOLUTION
9.850
13.466.07
12 Jun 2017
13.467.00
13 Jun 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
Restart in Safe Mode
Step 4
Search and delete this file
- %User Profile%\WindowsOverride.txt
- %Desktop%\LEES_MIJ.txt
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as RANSOM_HIDDENTEARRABLOCK.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 6
Restore encrypted files from backup.
Step 7
Scan your computer with your Trend Micro product to delete files detected as RANSOM_HIDDENTEARRABLOCK.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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