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Trojan.Win32.COBALT.BH

July 21, 2022
 Analysis by: Mc Justine De Guzman
 ALIASES:

Backdoor:Win64/CobaltStrike.NP!dha (MICROSOFT)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • 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:

284,672 bytes

Initial Samples Received Date:

20 Jul 2022

Payload:

Collects system information, 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.

Information Theft

This Trojan gathers the following data:

  • Username
  • Computer name
  • Executable's filename
  • OS Version

Other Details

This Trojan does the following:

  • It connects to the following URL to download a component which it will load in its memory and perform its malicious routine:
    • https://{BLOCKED}aregays.com:8443/api/3
    • https://{BLOCKED}aregays.com:8443/api/4
  • It creates an outbound pipe named:
    • MSSE-{Random Number}-server

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

17.698.06

FIRST VSAPI PATTERN DATE:

20 Jul 2022

VSAPI OPR PATTERN File:

17.699.00

VSAPI OPR PATTERN Date:

21 Jul 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.Win32.TRX.XXPE50FLM011

Step 2

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 3

Scan your computer with your Trend Micro product to delete files detected as Trojan.Win32.COBALT.BH. 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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