Ransom_ZGAMES.THAABFAH
Trojan:MSIL/HiddenTear.B (Microsoft), Ransom.HiddenTear (Malwarebytes), MSIL/Filecoder.IX!tr (Fortinet)
Windows
Threat Type: Ransomware
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
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 encrypts files with specific file extensions. It encrypts files found in specific folders. It drops files as ransom note.
TECHNICAL DETAILS
151,552 bytes
EXE
No
26 Nov 2018
Connects to URLs/IPs, Steals information, Displays message/message boxes, 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:
- %Desktop%/test/READ_IT.txt
(Note: %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\Desktop on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)
Information Theft
This Ransomware gathers the following data:
- Computer Name
- User Name
- Generated Keys (AES encrypted)
Stolen Information
This Ransomware sends the gathered information via HTTP POST to the following URL:
- http://{BLOCKED}tearundetectable.altervista.org/sqlServer.php?{Computer Name}-{User Name}%20{Key}
Ransomware Routine
This Ransomware encrypts files with the following extensions:
- txt
- doc
- docx
- xls
- xlsx
- ppt
- pptx
- odt
- jpg
- png
- csv
- sql
- mdb
- sln
- php
- asp
- aspx
- html
- xml
- psd
It encrypts files found in the following folders:
- %Desktop%/test/
(Note: %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\Desktop on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)
It appends the following extension to the file name of the encrypted files:
- .locked
It drops the following file(s) as ransom note:
- %Desktop%/test/READ_IT.txt
SOLUTION
9.850
14.650.02
26 Nov 2018
14.651.00
27 Nov 2018
Step 1
Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 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_ZGAMES.THAABFAH
- 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.
- 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.
- If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.
Step 4
Search and delete this file
- %Desktop%/test/READ_IT.txt
Step 5
Scan your computer with your Trend Micro product to delete files detected as Ransom_ZGAMES.THAABFAH. 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 6
Restore encrypted files from backup.
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