HTML_MALPHISH.ANF

 Analysis by: Michael Jay Villanueva

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Spammed via email, Dropped by other malware, Downloaded from the Internet

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 does not have any propagation routine.

It does not have any backdoor routine.

  TECHNICAL DETAILS

File Size:

11,784 bytes

File Type:

HTML, HTM

Memory Resident:

No

Initial Samples Received Date:

03 Aug 2017

Payload:

Connects to URLs/IPs, Displays graphics/image

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.

Propagation

This Trojan does not have any propagation routine.

Backdoor Routine

This Trojan does not have any backdoor routine.

Other Details

This Trojan does the following:

  • Upon the execution of the file, it displays the following page, which shows fake details to trick users on clicking the fake PDF image:

  • After the user clicks the fake PDF image on the page, this pop-up window will be displayed:

  • The displayed pop-up window contains textbox for username/email and password.
  • Upon clicking the "Download File" button on the pop-up window, the malware will connect to this malicious URL to send the stolen information (username and password input by the user):
    • http://www.{BLOCKED}mastery.com/ugo/file/log.php
      Where the data sent is in the following format:
      • feedback={Username/Email}&feedbacknow={Password}

    However, as of this writing, the said sites are inaccessible.
  • After the following routines above, the user will be automatically redirected to the legitimate Microsoft Live Login Page, to hide all the malicious routines done by the malware above.

NOTES:
The malware also uses the following sites to get the images/logos used on the displayed webpage as part of its phishing routine:

  • http://www.{BLOCKED}sultoria.com.br/z/one/files/logo.jpg -> fake OneDrive logo
  • http://www.{BLOCKED}sultoria.com.br/z/POedited.jpg -> fake PDF image

  •   SOLUTION

    Minimum Scan Engine:

    9.850

    FIRST VSAPI PATTERN FILE:

    13.572.02

    FIRST VSAPI PATTERN DATE:

    03 Aug 2017

    VSAPI OPR PATTERN File:

    13.573.00

    VSAPI OPR PATTERN Date:

    04 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

    Close all opened browser windows

    Step 3

    Scan your computer with your Trend Micro product to delete files detected as HTML_MALPHISH.ANF. 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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