Analysis by: Maria Emreen Viray
 Modified by: Bren Matthew Ebriega
ALIASES:

Trj/Gamarue.A (PANDA); HEUR:Trojan.Win32.Generic (KASPERSKY)

 PLATFORM:

Windows

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

  • Threat Type: Worm

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

This Worm 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: 6,545,152 bytes
File Type: DLL
Memory Resident: No
Initial Samples Received Date: 16 Mar 2021

Arrival Details

This Worm 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 Worm requires the existence of the following files to properly run:

  • {Malware Directory}\IndexerVolumeGuid

It does the following:

  • It loads and decrypts the component file IndexerVolumeGuid. The decrypted code will then be executed to perform its intended malicious routine.
  • If there are no IndexerVolumeGuid, it will create this file without any content.

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 16.598.04
FIRST VSAPI PATTERN DATE: 16 Mar 2021
VSAPI OPR PATTERN File: 16.599.00
VSAPI OPR PATTERN Date: 17 Mar 2021

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.XXPE50FFF042

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

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 4

Scan your computer with your Trend Micro product to delete files detected as Worm.Win32.GAMARUE.ENG. 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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