Trojan.VBS.COBEACON.F

April 26, 2023
 Analysis by: Jayvee Mark Villaroman
 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware

This Trojan 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:

155 bytes

File Type:

VBS

Memory Resident:

No

Initial Samples Received Date:

21 Apr 2023

Payload:

Connects to URLs/IPs

Arrival Details

This Trojan 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 Trojan does the following:

  • This Trojan attempts to connect to a remote IP address: {BLOCKED}.{BLOCKED}.27.53 with port 52025, and then execute a hidden and elevated command shell (cmd.exe) on that remote system.
  • The connection attempt repeats every 60 seconds.

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

18.400.05

FIRST VSAPI PATTERN DATE:

22 Apr 2023

VSAPI OPR PATTERN File:

18.401.00

VSAPI OPR PATTERN Date:

23 Apr 2023

Step 1

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.

Step 2

Scan your computer with your Trend Micro product to delete files detected as Trojan.VBS.COBEACON.F. 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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