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

Tamaño del archivo 23,488 bytes
Tipo de archivo ELF
Fecha de recepción de las muestras iniciales 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

Motor de exploración mínimo 9.800
Primer archivo de patrones de VSAPI 19.928.08
Primera fecha de publicación de patrones de VSAPI 27 Feb 2025
Versión de patrones OPR de VSAPI 19.929.00
Fecha de publicación de patrones OPR de VSAPI 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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