Ransom.Linux.BESTWOFOUR.A
Trojan-Ransom.FileCrypter (IKARUS)
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
16,888 bytes
ELF
No
29 Nov 2023
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.
Other Details
This Ransomware does the following:
- It dsplays log activity through console.
Ransomware Routine
This Ransomware encrypts files with the following extensions:
- .csv
- .docx
- .json
- .sql
- .txt
- .xlsx
- .xml
It encrypts files found in the following folders:
- /forela-criticaldata/
It appends the following extension to the file name of the encrypted files:
- .24bes
It drops the following file(s) as ransom note:
- {Encrypted File Path}\{Encrypted File Name}.24bes_note.txt
SOLUTION
9.800
18.848.05
29 Nov 2023
18.845.00
30 Nov 2023
Step 1
Trend Micro Predictive Machine Learning detects and blocks malware at the first sign of its existence, before it executes on your system. When enabled, your Trend Micro product detects this malware under the following machine learning name:
- Troj.ELF.TRX.XXELFC1DFF034
Step 2
Scan your computer with your Trend Micro product to delete files detected as Ransom.Linux.BESTWOFOUR.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 3
Restore encrypted files from backup.
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