Analysis by: Neljorn Nathaniel Aguas
 PLATFORM:

Linux

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

  • Threat Type: Ransomware

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel: 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 avoids encrypting files with the following file extensions.

  TECHNICAL DETAILS

File Size: 2,378,096 bytes
File Type: ELF
Memory Resident: No
Initial Samples Received Date: 03 Jul 2024
Payload: 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 won't proceed to encryption unless the parameter -p | --path is specified.

It accepts the following parameters:

  • -h | --help → show help message
  • -p | --path {Path} → encrypt files in the specified path
  • -m | --mode local → encrypt mode - only local (default)
  • -l | --log {Filename} → log file path
  • -v | --verbose → enable verbose mode
  • --exclude-vms {Filename} → filename path with VMS names for excluding encrypting
  • --esxi-vm-killer-off → disable ESXi VMS killer
  • --no-mutex → start program without checking global sync object

Ransomware Routine

This Ransomware appends the following extension to the file name of the encrypted files:

  • .NBA

It avoids encrypting files with the following file extensions:

  • .NBA
  • .NBA{Any String}

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 19.444.05
FIRST VSAPI PATTERN DATE: 03 Jul 2024
VSAPI OPR PATTERN File: 19.445.00
VSAPI OPR PATTERN Date: 04 Jul 2024

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.XXELFC1DFF045

Step 2

Scan your computer with your Trend Micro product to delete files detected as Ransom.Linux.EBANUL.THGOCBD. 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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