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JS_IFRAME.APSS

August 25, 2014
 Analysis by: RonJay Kristoffer Caragay
 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: No

  • In the wild: Yes

  OVERVIEW


This Trojan may arrive bundled with malware packages as a malware component. 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 may be hosted on a website and run when a user accesses the said website.

It does not have any propagation routine.

It does not have any backdoor routine.

It does not have any information-stealing capability.

This is the Trend Micro detection for files that contain malicious IFRAME tags. Once a user visits an affected Web page, this HTML script launches a hidden IFRAME that connects to a malicious URL. It redirects browsers to certain sites. However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size:

1,547 bytes

File Type:

HTML, HTM

Memory Resident:

No

Initial Samples Received Date:

11 Aug 2014

Payload:

Launches a hidden iframe,Connects to URLs/IPs

Arrival Details

This Trojan may arrive bundled with malware packages as a malware component.

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 may be hosted on a website and run when a user accesses the said website.

Propagation

This Trojan does not have any propagation routine.

Backdoor Routine

This Trojan does not have any backdoor routine.

Information Theft

This Trojan does not have any information-stealing capability.

Other Details

This is the Trend Micro detection for files that contain malicious IFRAME tags.

It inserts the following IFRAME code in webpages:

  • http://{BLOCKED}8r1bihsjwuj1n4zf.{BLOCKED}clectica.com.mx/kafecodes/kholdq/zwen.php

Once a user visits an affected Web page, this HTML script launches a hidden IFRAME that connects to a malicious URL.

It redirects browsers to the following sites:

  • http://{BLOCKED}r69kzr92ym89cr9.{BLOCKED}aescort.biz/adsort.php?yy=1&aid=2&atr=exts&src=39

However, as of this writing, the said sites are inaccessible.

  SOLUTION

Minimum Scan Engine:

9.700

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 JS_IFRAME.APSS. 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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