Analysis by: Jennifer Gumban
 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel: Downloaded from the Internet

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 may be downloaded by other malware/grayware from remote sites.

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

It deletes itself after execution.

  TECHNICAL DETAILS

File Size: 3,007 bytes
File Type: HTA
Memory Resident: Yes
Initial Samples Received Date: 12 Sep 2017
Payload: Connects to URLs/IPs, Downloads files

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.

It may be downloaded by the following malware/grayware from remote sites:

It may be downloaded from the following remote sites:

  • http://{BLOCKED}.{BLOCKED}.236.207/img/word.db

Download Routine

This Trojan accesses the following websites to download files:

  • http://{BLOCKED}.{BLOCKED}.236.207/img/left.jpg

It saves the files it downloads using the following names:

  • {user's home path}\AppData\Roaming\Microsoft\Windows\{random value}

Trend Micro detects the dowloaded file as:

  • TSPY_FINSPY.A

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

Other Details

This Trojan deletes itself after execution.

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 13.656.03
FIRST VSAPI PATTERN DATE: 13 Sep 2017
VSAPI OPR PATTERN File: 13.657.00
VSAPI OPR PATTERN Date: 13 Sep 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

Remove the malware/grayware file dropped/downloaded by TROJ_POWLOAD.ASUKQ. (Note: Please skip this step if the threat(s) listed below have already been removed.)

    • TSPY_FINSPY.A
    • TROJ_CVE20178759.A

Step 3

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_POWLOAD.ASUKQ. 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.

Step 4

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