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Ransom.Win64.PARYTICKET.THBBDBB

March 03, 2022
 Analysis by: Patrick Noel Collado
 ALIASES:

Ransom:Win32/SonicVote.A!dha (Microsoft), Trojan-Ransom.Win64.Agent.a (Kaspersky)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Ransomware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel:

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 executes then deletes itself afterward.

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

  TECHNICAL DETAILS

File Size:

3,295,232 bytes

File Type:

EXE

Memory Resident:

Yes

Payload:

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 copies of itself into the affected system:

  • {Malware Path}\{UID based on current timestamp and machine's mac address}.exe
    • Drops a copy of itself for every file it will encrypt.

It adds the following processes:

  • Only adds the following processes if no argument was passed:
    • cmd /c copy {malware filename}.exe {UID based on current timestamp and machine's mac address}.exe
    • {UID based on current timestamp and machine's mac address}.exe {file path and file name of file to be encrypted}

It executes then deletes itself afterward.

Information Theft

This Ransomware accepts the following parameters:

  • {Path of file to be encrypted}

Ransomware Routine

This Ransomware encrypts files with the following extensions:

  • .docx
  • .doc
  • .dot
  • .odt
  • .pdf
  • .xls
  • .xlsx
  • .rtf
  • .ppt
  • .pptx
  • .one
  • .xps
  • .pub
  • .vsd
  • .txt
  • ​​.jpg
  • .jpeg
  • .bmp
  • .ico
  • .png
  • .gif
  • .sql
  • .xml
  • .pgsql
  • .zip
  • .rar
  • .exe
  • .msi
  • .vdi
  • .ova
  • .avi
  • .dip
  • .epub
  • .iso
  • .sfx
  • .inc
  • .contact
  • .url
  • .mp3
  • .wmv
  • .wma
  • .wtv
  • .cab
  • .acl
  • .cfg
  • .chm
  • .crt
  • .css
  • .dat
  • .dll
  • .html
  • .htm

It avoids encrypting files with the following strings in their file path:

  • Windows
  • Program Files

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

  • .[vot{BLOCKED}rjb@{BLOCKED}ail.com].encryptedJB

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

  • %Desktop%\read_me.html

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

17.416.02

FIRST VSAPI PATTERN DATE:

02 Mar 2022

VSAPI OPR PATTERN File:

17.417.00

VSAPI OPR PATTERN Date:

03 Mar 2022

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.Win64.PARYTICKET.THBBDBB

[ Learn More ]
  1. 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.
  2. 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.
  3. 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

[ 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}\{UID based on current timestamp and machine's mac address}.exe
  • %Desktop%\read_me.html

Step 5

Scan your computer with your Trend Micro product to delete files detected as Ransom.Win64.PARYTICKET.THBBDBB. 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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