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

Canal de infección 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

Tamaño del archivo 65,264 bytes
Tipo de archivo ELF
Residente en memoria No
Fecha de recepción de las muestras iniciales 12 Feb 2024
Carga útil 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

Motor de exploración mínimo 9.800
Primer archivo de patrones de VSAPI 19.156.03
Primera fecha de publicación de patrones de VSAPI 13 Feb 2024
Versión de patrones OPR de VSAPI 19.157.00
Fecha de publicación de patrones OPR de VSAPI 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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