JS_DLOAD.XPO

November 26, 2014
 Analysis by: Homer Pacag
 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

This Trojan executes when a user accesses certain websites where it is hosted.

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

  TECHNICAL DETAILS

File Size:

5962 bytes

File Type:

JS

Memory Resident:

No

Initial Samples Received Date:

20 Nov 2014

Payload:

Downloads files

Arrival Details

This Trojan executes when a user accesses certain websites where it is hosted.

Download Routine

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

  • http://{BLOCKED}.{BLOCKED}.166.223/document.php?id=5454515E0500160D050A054A030C0D0705241016050001120D0808014A0111&fn={%User Temp%}\51565374.exe

It saves the files it downloads using the following names:

  • %User Temp%\51565374.exe

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

Other Details

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

  SOLUTION

Minimum Scan Engine:

9.700

FIRST VSAPI PATTERN FILE:

11.296.03

FIRST VSAPI PATTERN DATE:

24 Nov 2014

VSAPI OPR PATTERN File:

11.297.00

VSAPI OPR PATTERN Date:

24 Nov 2014

Step 1

Scan your computer with your Trend Micro product to delete files detected as JS_DLOAD.XPO. 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 2

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.


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