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SWF_EXPLOYT.YYLT

February 17, 2016
 Analysis by: Janus Agcaoili
 ALIASES:

Troj/SWFRed-L (Sophos), Exploit.SWF.Agent.on (Kaspersky), SWF/Exploit.Agent.HQ (ESET-NOD32)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


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

  TECHNICAL DETAILS

File Size:

3,365 bytes

File Type:

SWF

Memory Resident:

No

Initial Samples Received Date:

04 Feb 2016

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

Other Details

This Trojan does the following:

  • Creates a hidden iFrame on the current webpage to redirect to a possibly malicious URL:
    • http://{BLOCKED}dget.com/in/u=aGFyYm91cmZyb250Y2VudHJlfGlufDIwOXwxfDF8fG5vfDB8bm9uZXxvblN0YXJ0fG5vfG5vve=090415
  • Checks for following CVEs:

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

12.316.02

FIRST VSAPI PATTERN DATE:

04 Feb 2016

VSAPI OPR PATTERN File:

12.317.00

VSAPI OPR PATTERN Date:

05 Feb 2016

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 SWF_EXPLOYT.YYLT. 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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