arrow_back
search
close

Backdoor.Linux.REKOBEE.AB

May 25, 2022
 ALIASES:

Backdoor:Linux/Rekobee (MICROSOFT)

 PLATFORM:

Linux

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

This Backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

  TECHNICAL DETAILS

File Size:

959,000 bytes

File Type:

ELF

Memory Resident:

Yes

Initial Samples Received Date:

24 May 2022

Arrival Details

This Backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This Backdoor adds the following processes:

  • systemctl enable biosetd
  • systemctl daemon-reload
  • systemctl start biosetd

Backdoor Routine

This Backdoor connects to the following URL(s) to send and receive commands from a remote malicious user:

  • {BLOCKED}.{BLOCKED}.233.87

Other Details

This Backdoor does the following:

  • It renames itself to the following, if it is found inexisting:
    • /usr/bin/biosetd
  • It creates and starts the following service:
    • /lib/systemd/system/biosetd.service -> executes "/bin/bash -c /usr/bin/biosetd" upon restart

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

17.584.04

FIRST VSAPI PATTERN DATE:

24 May 2022

VSAPI OPR PATTERN File:

17.585.00

VSAPI OPR PATTERN Date:

25 May 2022

Scan your computer with your Trend Micro product to delete files detected as Backdoor.Linux.REKOBEE.AB. 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:


Did this description help? Tell us how we did.