Ransom_TQV.THHBCAH
Ransom:Win32/Genasom (Microsoft), HEUR:Trojan-Ransom.Win32.Agent.gen (Kaspersky)
Windows
Threat Type: Ransomware
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
Downloaded from the Internet, Dropped by other malware, Spammed via email
This Ransomware arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
As of this writing, the said sites are inaccessible.
It deletes itself after execution. It is capable of encrypting files in the affected system.
It encrypts files with specific file extensions. It drops files as ransom note.
TECHNICAL DETAILS
151,552 bytes
EXE
Yes
16 Jul 2018
Downloads files, Connects to URLs/IPs, Drops files, Displays message/message boxes
Arrival Details
This Ransomware arrives as an attachment to email messages spammed by other malware/grayware or malicious users.
It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Download Routine
This Ransomware accesses the following websites to download files:
- hxxp://download.{BLOCKED}quocvi.com/TQVDecrypt.exe
It saves the files it downloads using the following names:
- TQVDecrypt.exe
As of this writing, the said sites are inaccessible.
Stolen Information
This Ransomware sends the data it gathers to the following email addresses via SMTP:
- gavaivt@{BLOCKED}l.com
Other Details
This Ransomware deletes itself after execution.
It is capable of encrypting files in the affected system.
Ransomware Routine
This Ransomware encrypts files with the following extensions:
- .txt
- .doc
- .docx
- .xls
- .xlsx
- .ppt
- .pptx
- .rar
- .zip
- .mp3
- .mp4
- .wmv
- .bmp
- .png
- .jpg
It appends the following extension to the file name of the encrypted files:
- .TQV
It drops the following file(s) as ransom note:
- {Encrypted Folder}/@@README.TXT
SOLUTION
9.850
14.460.02
23 Aug 2018
14.461.00
24 Aug 2018
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_TQV.THHBCAH
- 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 these files
- {Encrypted Folder}\@@README.TXT
- {Desktop Folder}\TQVDecrypt.exe
Step 5
Scan your computer with your Trend Micro product to delete files detected as Ransom_TQV.THHBCAH. 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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