Backdoor.Linux.COBEACON.AB

May 25, 2022
 Analysis by: Nathaniel Gregory Ragasa
 ALIASES:

Troj/Bckdr-RYE(SOPHOS_LITE), ELF/Agent.AR!tr(FORTINET)

 PLATFORM:

Windows

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted:

  • 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.

However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size:

207 bytes

File Type:

ELF

Memory Resident:

No

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.

Other Details

This Backdoor does the following:

  • It connects to the following URL to download its component which it will load in its memory and perform its malicious routine:
    • {BLOCKED}.{BLOCKED}.150.23:80

However, as of this writing, the said sites are inaccessible.

  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

Step 1

Trend Micro Predictive Machine Learning detects and blocks malware at the first sign of its existence, before it executes on your system. When enabled, your Trend Micro product detects this malware under the following machine learning name:

     
    • Troj.ELF.TRX.XXELFC1DFF016

Step 2

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


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