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SWF_NEUTEK.J

August 12, 2016
 Analysis by: Cris Nowell Pantanilla
 ALIASES:

Exploit-SWF.bd (McAfee), SWF/Neutrino.Gen (AhnLab-V3)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 REPORTED INFECTION:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Hosted on a compromised site.


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

It connects to certain URLs. It may do this to remotely inform a malicious user of its installation. It may also do this to download possibly malicious files onto the computer, which puts the computer at a greater risk of infection by other threats. It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system. As of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size:

77,662 bytes

File Type:

SWF

Memory Resident:

No

Initial Samples Received Date:

10 Aug 2016

Payload:

Downloads files, Executes files

Arrival Details

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

Download Routine

This Trojan connects to the following malicious URLs:

  • http://{blocked}cacm.{blocked}stkd.com/past/1543371/grumble-outside-treasure-secret-control-concentrate
  • http://{blocked}cacm.{blocked}stkd.com/1987/09/10/flower/another-open-somebody-oxford-fang-work-device-ticket.html

It connects to the following website(s) to download and execute a malicious file:

  • http://{blocked}cacm.{blocked}stkd.com/monstrous/1434865/anxious-cock-sleep-history-haste-city-stun-cheap-bare
  • http://{blocked}cacm.{blocked}stkd.com/lunch/curiosity-carve-temper-26073249
  • http://{blocked}cacm.{blocked}stkd.com/mist/1924587/nasty-until-motive-loss-pull-grasp-mistress-unicorn-salt-expedition
  • http://{blocked}cacm.{blocked}stkd.com/shadow/lucky-24317151
  • http://{blocked}cacm.{blocked}stkd.com/1970/08/10/mention/church/opportunity/love-shriek-side-former-bury.html
  • http://{blocked}cacm.{blocked}stkd.com/1997/11/11/consent/quiver-gaze-crew-mirror-betray.html
  • http://{blocked}cacm.{blocked}stkd.com/clench/1783673/uneasy-security-sign-fearful-soft-avoid

It takes advantage of the following software vulnerabilities to download possibly malicious files:

It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

As of this writing, the said sites are inaccessible.

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

12.706.07

FIRST VSAPI PATTERN DATE:

10 Aug 2016

VSAPI OPR PATTERN File:

12.707.00

VSAPI OPR PATTERN Date:

11 Aug 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

Scan your computer with your Trend Micro product to delete files detected as SWF_NEUTEK.J. 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 3

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.  MS14-064


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