Analysis by: Mc Justine De Guzman
 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

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: 1,000,960 bytes
File Type: DLL
Initial Samples Received Date: 04 Feb 2022

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.

Installation

This Trojan adds the following processes:

  • %System%\rundll32.exe "%System%\{Random file name}.{Random 3 letter extension}", {4-random characters}
  • %System%\rundll32.exe "%System%\{Random file name}.{Random 3 letter extension}",DllRegisterServer

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

Other Details

This Trojan connects to the following possibly malicious URL:

  • {BLOCKED}.{BLOCKED}.{BLOCKED}.{BLOCKED}
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.{BLOCKED}
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.{BLOCKED}
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.{BLOCKED}
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.{BLOCKED}
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.{BLOCKED}
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.{BLOCKED}
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.{BLOCKED}
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.{BLOCKED}
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.{BLOCKED}
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.{BLOCKED}
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.{BLOCKED}
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.{BLOCKED}
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.{BLOCKED}
  • {BLOCKED}.{BLOCKED}.{BLOCKED}.{BLOCKED}

It does the following:

  • It renames itself to %System%\{Random file name}.{Random 3 letter extension}

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 17.368.04
FIRST VSAPI PATTERN DATE: 07 Feb 2022
VSAPI OPR PATTERN File: 17.369.00
VSAPI OPR PATTERN Date: 08 Feb 2022

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

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Scan your computer with your Trend Micro product to delete files detected as Trojan.Win32.EMOTET.UWAOIBEMX. 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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