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SWF_EXPLOIT.MJTE

June 16, 2015
 Analysis by: Francis Xavier Antazo
 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

Infection Channel:

Downloaded from the Internet


This exploit was included in the Magnitude Exploit Kit, which allowed attackers to spread crypto-ransomware into their target systems in the US, Canada, and the UK.

To get a one-glance comprehensive view of the behavior of this Trojan, refer to the Threat Diagram shown below.

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 requires its main component to successfully perform its intended routine. Once a malware successfully exploits the said vulnerability, it causes certain actions to be done on the system. It takes advantage of certain vulnerabilities.

  TECHNICAL DETAILS

File Size:

19,007 bytes

File Type:

SWF

Memory Resident:

No

Initial Samples Received Date:

16 Jun 2015

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.

Other Details

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

Once a malware successfully exploits the said vulnerability, it causes the following actions to be done on the system:

  • Allows attackers to execute arbitrary code on the affected system.

It takes advantage of the following vulnerabilities:

  • CVE-2015-3105

NOTES:

The following versions are affected by this exploit:

  • Adobe Flash Player before 13.0.0.292 and 14.x through 18.x before 18.0.0.160 on Windows and OS X and before 11.2.202.466 on Linux
  • Adobe AIR before 18.0.0.144 on Windows and before 18.0.0.143 on OS X and Android, Adobe AIR SDK before 18.0.0.144 on Windows and before 18.0.0.143 on OS X
  • Adobe AIR SDK and Compiler before 18.0.0.144 on Windows and before 18.0.0.143 on OS X

  SOLUTION

Minimum Scan Engine:

9.750

FIRST VSAPI PATTERN FILE:

11.734.04

FIRST VSAPI PATTERN DATE:

16 Jun 2015

VSAPI OPR PATTERN File:

11.735.00

VSAPI OPR PATTERN Date:

17 Jun 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.MJTE. 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.

Step 4

Download and apply this security patch Refrain from using these products until the appropriate patches have been installed. Trend Micro advises users to download critical patches upon release by vendors.


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