Ransom.PS1.VULPIX.A
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. It drops files as ransom note.
TECHNICAL DETAILS
14,893 bytes
PS1
No
07 Mar 2024
Drops 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.
Dropping Routine
This Ransomware drops the following files:
- {Malware Path}\Vulpixlist.txt → contains a text of the path of the ransom note
Other Details
This Ransomware does the following:
- It avoids encrypting files with attributes set to HIDDEN.
- It overwrites the content of the target files using the following format:
- {Encrypted Data}{"ASTRID"}{Encryption Key Length}{Encryption IV Length}{Encryption Key}{Encryption IV}
- It displays a fixed window while encrypting files:
Ransomware Routine
This Ransomware encrypts files with the following extensions:
- .doc
- .docx
- .jpeg
- .sql
- .xls
- .xlsx
It encrypts files found in the following folders:
- C:\Adata → including subfolders
It appends the following extension to the file name of the encrypted files:
- .vulpix
It drops the following file(s) as ransom note:
- C:\Adata\VulpixReadMe.txt
SOLUTION
9.800
19.272.04
11 Apr 2024
19.273.00
12 Apr 2024
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
Search and delete these files
- C:\Adata\VulpixReadMe.txt
- {Malware Path}\Vulpixlist.txt
Step 4
Scan your computer with your Trend Micro product to delete files detected as Ransom.PS1.VULPIX.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 the following Trend Micro Support pages for more information:
Step 5
Restore encrypted files from backup.
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