Analysis by: Rhena Inocencio
ALIASES:

TrojanDropper:Win32/CVE-2016-4117.A (Microsoft), Win32/Exploit.CVE-2016-4117.A trojan (ESET), HEUR:Exploit.SWF.Agent.gen (Kaspersky)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel: Spammed via email

(RE: [Noteworthy] Flash 0day(CVE-2016-4117)) According to the report, Separately, Adobe officials warned that a newly discovered Flash vulnerability also gives attackers the ability to remotely hijack machines. It was first reported by researchers from security firm FireEye, and exploits exist in the wild.

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

  TECHNICAL DETAILS

File Size: 84,842 bytes
File Type: RTF
Initial Samples Received Date: 23 May 2016
Payload: Connects to URLs/IPs

Arrival Details

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

Other Details

More information on this vulnerability can be found below:

It does the following:

  • It accesses the following URL to an retrieve arbitrary code and run it using CVE-2016-4117:
    • http://{BLOCKED}biitw34uywk4ncwj4xklhyykhtg7trf6dhh5376mdc7kd3qjr2o.{BLOCKED}2jekxqatfjgxhrxxfhkqnd4ibfrnsnyotsov5wq-----x.xfer.{BLOCKED}s.org/dc/serverpars/f7omh91n.mtx

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 12.544.07
FIRST VSAPI PATTERN DATE: 23 May 2016
VSAPI OPR PATTERN File: 12.545.00
VSAPI OPR PATTERN Date: 24 May 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

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_CVE20164117.A. 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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