JS_PHISH.YTUEAN

March 29, 2018
 Analysis by: Wilbert Vidal
 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

This Trojan arrives as a component bundled with malware/grayware packages.

  TECHNICAL DETAILS

File Size:

553,299 bytes

File Type:

JS

Memory Resident:

Yes

Initial Samples Received Date:

22 Mar 2018

Arrival Details

This Trojan arrives as a component bundled with malware/grayware packages.

Installation

This Trojan drops the following files:

  • {malware directory}/aoWLC

Other Details

This Trojan does the following:

  • It needs the arguments as follows: "{url}" "{hex malware directory}746f64656661" "{hex malware directory}7461726f6d656c" "--IsErIk"
    • The 1st and 2nd arguments are used for accessing the HTTP Server.
    • It needs argument "--IsErIk" to complete its intended routine.
  • It looks for the files {malware directory}/hdat2 in accessing the HTTP Server.

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

14.144.06

FIRST VSAPI PATTERN DATE:

22 Mar 2018

VSAPI OPR PATTERN File:

14.145.00

VSAPI OPR PATTERN Date:

23 Mar 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 this file

[ 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.  
  • {malware directory}/aoWLC

Step 4

Scan your computer with your Trend Micro product to delete files detected as JS_PHISH.YTUEAN. 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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