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SWF_EXPLOYT.BL

February 07, 2018
 ALIASES:

Exploit:SWF/Korpode.A (Microsoft); Exp.SWF.CVE-2018-4878.B (CAT-QuickHeal); SWF/CVE_2018_4878.A!exploit (Fortinet)

 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:

Dropped by other malware

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 exploits a vulnerability identified as in a zero-day attack. However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size:

108,813 bytes

File Type:

SWF

Memory Resident:

No

Initial Samples Received Date:

22 Jan 2018

Payload:

Executes files, Connects to URLs/IPs

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 exploits a zero-day vulnerability. More information on the said vulnerability can be found in the following pages:

It does the following:

  • Upon execution, this Trojan downloads and executes a shellcode from the following URL and executes it:
    • http://www.{BLOCKED}40.co.kr/conf/product_old.jpg

However, as of this writing, the said sites are inaccessible.

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

13.940.06

FIRST VSAPI PATTERN DATE:

22 Jan 2018

VSAPI OPR PATTERN File:

13.941.00

VSAPI OPR PATTERN Date:

23 Jan 2018

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_EXPLOYT.BL. 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 the following Trend Micro Support pages 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.


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