Analysis by: Johnlery Triunfante
 Modified by: Nikko Tamana
ALIASES:

TrojanDownloader:PowerShell/Tamekaloka.A (Microsoft)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • 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.

It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

  TECHNICAL DETAILS

File Size: 261 bytes
File Type: BAT
Memory Resident: Yes
Initial Samples Received Date: 01 Nov 2017

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.

Download Routine

This Trojan connects to the following website(s) to download and execute a malicious file:

  • http://107.179{BLOCKED}43:8000/mate6.ps1 - Executed in memory, detected as BAT_COINMINE.WIPS

It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 13.754.07
FIRST VSAPI PATTERN DATE: 01 Nov 2017
VSAPI OPR PATTERN File: 13.755.00
VSAPI OPR PATTERN Date: 01 Nov 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

Terminate a malware/grayware process

[ Learn More ]

*Note: If the detected process is not displayed in theWindows Task Manager, continue doing the next steps.

    Step 3

    Scan your computer with your Trend Micro product to delete files detected as TROJ_POWLOAD.AUSJSG. 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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