Analysis by: Sammy Chua
ALIASES:

Trojan.JS.Agent.crn (Kaspersky); JS/Exploit.Agent.NKZ (NOD32)

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

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

  TECHNICAL DETAILS

File Size: 123,702 bytes
File Type: HTML, HTM
Memory Resident: No
Initial Samples Received Date: 19 Nov 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.

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

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}alserieiniziali.loneoakcommunity.com/name.ppthtml?heart=r9OpzHa&department=&French=Aqv8-FKt59&feed=&well=z-YxlxLL5kLFvXn_fXkkFuGGQ2Jzc3q

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

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 12.160.01
FIRST VSAPI PATTERN DATE: 19 Nov 2015
VSAPI OPR PATTERN File: 12.161.00
VSAPI OPR PATTERN Date: 20 Nov 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 HTML_OBFUSCA.SFS. 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.


Did this description help? Tell us how we did.