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TROJ_EXPLOYT.KORPD

February 07, 2018
 Analysis by: John Kevin Sanchez
 ALIASES:

Troj/SwfExp-OI (Sophos), Exploit:SWF/Korpode.A (Microsoft), Exploit.SWF.Agent.rs (Kaspersky)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


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:

121,344 bytes

File Type:

DOC, DOCX

Memory Resident:

Yes

Initial Samples Received Date:

03 Feb 2018

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 connects to the following possibly malicious URL:

  • http://www.{BLOCKED}tax.info/main/local.php

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

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

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

13.944.02

FIRST VSAPI PATTERN DATE:

03 Feb 2018

VSAPI OPR PATTERN File:

13.945.00

VSAPI OPR PATTERN Date:

04 Feb 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 TROJ_EXPLOYT.KORPD. 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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