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 arrives as a component bundled with malware/grayware packages.

It deletes itself after execution.

  TECHNICAL DETAILS

File Size: 232 bytes
File Type: BAT
Memory Resident: No
Initial Samples Received Date: 04 Jan 2018

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.

It arrives as a component bundled with malware/grayware packages.

Other System Modifications

This Trojan deletes the following files:

  • {Malware Path}\r2.exe

Other Details

This Trojan does the following:

  • Executes the following files on the malware's directory:
  • Uses multiple arguments in executing "r2.exe".
  • Requires password as an argument in order to execute "r2.exe" properly.

It deletes itself after execution.

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 13.884.04
FIRST VSAPI PATTERN DATE: 04 Jan 2018
VSAPI OPR PATTERN File: 13.885.00
VSAPI OPR PATTERN Date: 05 Jan 2018

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 files detected as BAT_STARTER.AUSJG

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
  • TROJ_RUNNER.GAZ

Step 4

Scan your computer with your Trend Micro product to delete files detected as BAT_STARTER.AUSJG. 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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