Analysis by: John Rainier Navato
 ALIASES:

Trojan.Linux.Bpfdoor (IKARUS)

 PLATFORM:

Windows

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes


  TECHNICAL DETAILS

Tipo de compactação: 23,488 bytes
Tipo de arquivo: ELF
Data de recebimento das amostras iniciais: 24 Mar 2025
Carga útil: Drops files, Deletes files

Installation

This Backdoor drops the following files:

  • /dev/shm/kdevtmpfls
  • /var/run/kdevrund.pid

It adds the following processes:

  • /bin/sh -c /bin/rm -f /dev/shm/kdevtmpfls;/bin/cp ./{Malware File Name} /dev/shm/kdevtmpfls && /bin/chmod 755 /dev/shm/kdevtmpfls && /dev/shm/kdevtmp
  • /dev/shm/kdevtmpfls --init
  • /bin/rm -f /dev/shm/kdevtmpfls

Other System Modifications

This Backdoor deletes the following files:

  • /dev/shm/kdevtmpfls

  SOLUTION

Mecanismo de varredura mínima: 9.800
Primeiro arquivo padrão VSAPI: 19.928.08
Data do lançamento do primeiro padrão VSAPI: 27 Feb 2025
VSAPI OPR Pattern Version: 19.929.00
VSAPI OPR Pattern veröffentlicht am: 28 Feb 2025

Scan your computer with your Trend Micro product to delete files detected as Backdoor.Linux.BPFDOOR.SMZAJE-B. 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:


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