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HTML_WEBKIT.AS

March 08, 2014
 Analysis by: Mark Joseph Manahan
 ALIASES:

Mal/Phish-A (Sophos) ,JS/Kryptik.AGJ trojan (Eset) ,Trojan.Webkit!html (Symantec)

 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

 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:

Spammed via email


This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

  TECHNICAL DETAILS

File Size:

39,003 bytes

File Type:

HTML, HTM

Memory Resident:

No

Initial Samples Received Date:

17 Dec 2013

Payload:

Steals information

Arrival Details

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

Stolen Information

This Trojan sends the gathered information via HTTP POST to the following URL:

  • http://{BLOCKED}.{BLOCKED}.135.49/info/aexp.php

NOTES:

It displays a fraudulent webpage enttitled "American Express Verify | Step 1 - 2" to trick users into sending the following information to the malicious user:

  • AMEX username and password
  • Card number, CID, CSC, and expiration Date
  • Billing address and zip code
  • Identification (Social Security number, birthdate, mother's maiden name, security PIN, driver's license)
  • E-mail address and password

  SOLUTION

Minimum Scan Engine:

9.700

FIRST VSAPI PATTERN FILE:

10.478.01

FIRST VSAPI PATTERN DATE:

17 Dec 2013

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_WEBKIT.AS. 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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