Ransom.Linux.LIMPOOP.THBACBD

March 06, 2024
 Analysis by: Francesca Villasanta
 ALIASES:

UDS:Trojan-Ransom.Linux.Babuk.h (KASPERSKY); Trojan.Linux.Generic.333384 (BITDEFENDER)

 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 encrypts files with specific file extensions. It drops files as ransom note. It avoids encrypting files with the following file extensions.

  TECHNICAL DETAILS

File Size:

65,264 bytes

File Type:

ELF

Memory Resident:

No

Initial Samples Received Date:

12 Feb 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 prints the following upon execution:
    • Encrypted file names
    • Number of encrypted files
    • Number of files skipped
    • Total number of files scanned
    • Total size of encrypted files

It accepts the following parameters:

  • {Path to encrypt} → Required

Ransomware Routine

This Ransomware encrypts files with the following extensions:

  • .log
  • .vmdk
  • .vmsd
  • .vmem
  • .vswp
  • .vm
  • .db
  • .vmx2
  • .vmxf
  • .vmss
  • .vmtx
  • .vmtm
  • .nvram
  • .vsb
  • .vbm
  • .vlb
  • .vrb
  • .hlog
  • .rar
  • .vsm
  • .vib
  • .vbk
  • .zip
  • .iso
  • .gz
  • .tgz
  • .bco
  • .dump
  • .gzip
  • .bk
  • .bck
  • .bkp
  • .tmp
  • .vmx
  • .ova
  • .ovf
  • .tar
  • .mf
  • .vmd
  • .vmsn

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

  • {Original fllename}.{Original extension}.LIMPOPO

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

  • {Encrypted Directory}/LIMPOPO.txt

It avoids encrypting files with the following file extensions:

  • .LIMPOPO

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

19.156.03

FIRST VSAPI PATTERN DATE:

13 Feb 2024

VSAPI OPR PATTERN File:

19.157.00

VSAPI OPR PATTERN Date:

14 Feb 2024

Step 1

Scan your computer with your Trend Micro product to delete files detected as Ransom.Linux.LIMPOOP.THBACBD. 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 2

Restore encrypted files from backup.


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