Analysis by: Jemimah Mae Molina
ALIASES:

Linux/Bckdr-RVY (SOPHOS_LITE)

 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

Infection Channel: Downloaded from the Internet, Dropped by other malware

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.

It connects to certain websites to send and receive information.

  TECHNICAL DETAILS

File Size: 110,484 bytes
File Type: ELF
Memory Resident: Yes
Initial Samples Received Date: 20 Mar 2019
Payload: Connects to URLs/IPs, Collects system information, Executes files, Terminates itself

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.

Backdoor Routine

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

  • {BLOCKED}.{BLOCKED}.35.89:65283

Other Details

This Backdoor connects to the following website to send and receive information:

  • hq.{BLOCKED}n.xyz
  • hq.{BLOCKED}i.xyz
  • hq.{BLOCKED}n.com
  • {BLOCKED}.{BLOCKED}.2.102
  • {BLOCKED}.{BLOCKED}.2.101

It does the following:

  • It has the following backdoor capabilities:
    • Execute terminal using popen function
    • Gather system and hardware information
    • Get CPU and memory information
    • Download and execute a file
    • Connect to another C&C server
    • Spawn a new process based on the argument
    • Sleep
    • Terminate itself

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 14.886.01
FIRST VSAPI PATTERN DATE: 20 Mar 2019
VSAPI OPR PATTERN File: 14.887.00
VSAPI OPR PATTERN Date: 21 Mar 2019

Scan your computer with your Trend Micro product to delete files detected as Backdoor.Linux.POPDZ.A. 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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