Analysis by: Homer Pacag
ALIASES:

SWF/ExKit.AK!exploit (Fortinet); VirTool:SWF/Obfuscator.K (Microsoft);

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

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

It requires its main component to successfully perform its intended routine. It takes advantage of certain vulnerabilities.

  TECHNICAL DETAILS

File Size: 37,777 bytes
Memory Resident: Yes
Initial Samples Received Date: 22 Apr 2015

Arrival Details

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

Other Details

This Trojan requires its main component to successfully perform its intended routine.

It takes advantage of the following vulnerabilities:

  • CVE-2015-0313

NOTES:

Once a compromised website is visited, the user's browser (with a vulnerable version of Adobe Flash) loads a specially-crafted Adobe Flash file. This exploit allows remote arbitrary code to execute on the affected system. Thus, it allows remote malicious users to deliver and execute payload on the affected system.

The affected software versions include the following:

  • Adobe Flash Player 16.0.0.296 and earlier versions for Windows
  • Macintosh Adobe Flash Player 13.0.0.264 and earlier 13.x versions

  SOLUTION

Minimum Scan Engine: 9.700
VSAPI OPR PATTERN File: 11.620.05
VSAPI OPR PATTERN Date: 22 Apr 2015
OPP PATTERN File: 11.621.00
OPP PATTERN Date: 22 Apr 2015

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_EXPLOIT.CAK. 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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