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TROJ_TRICKBOT.G

September 18, 2017
 Analysis by: Michael Jay Villanueva
 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 as an attachment to email messages spammed by other malware/grayware or malicious users. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It deletes the initially executed copy of itself.

  TECHNICAL DETAILS

File Size:

190,976 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

18 Sep 2017

Arrival Details

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

It 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 drops the following copies of itself into the affected system and executes them:

  • %System%\dcomevent.exe

(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:

  • http://{BLOCKED}.{BLOCKED}.245.164:443
  • http://{BLOCKED}.{BLOCKED}.85.153:443
  • http://{BLOCKED}.{BLOCKED}.149.185:587
  • http://{BLOCKED}.{BLOCKED}.36.113:587
  • http://{BLOCKED}.{BLOCKED}.130.140:465
  • http://{BLOCKED}.{BLOCKED}.35.11:587
  • http://{BLOCKED}.{BLOCKED}.141.213:465
  • http://{BLOCKED}.{BLOCKED}.255.228:587
  • http://{BLOCKED}.{BLOCKED}.150.21:465

It deletes the initially executed copy of itself

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

13.566.04

FIRST VSAPI PATTERN DATE:

31 Jul 2017

VSAPI OPR PATTERN File:

13.567.00

VSAPI OPR PATTERN Date:

01 Aug 2017

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 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

Search and delete these files

[ Learn More ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.  
  • %System%\dcomevent.exe

Step 4

Scan your computer with your Trend Micro product to delete files detected as TROJ_TRICKBOT.G. 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 this Knowledge Base page for more information.


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