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Threat Encyclopedia

TROJ_PRESHIN.JTT

ANALYSIS BY

Rhena Inocencio


PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

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:

Downloaded from the Internet


This malware is a PowerShell scripting file that downloads and launches the final payload BKDR_PRESHIN.JTT.

To get a one-glance comprehensive view of the behavior of this Trojan, refer to the Threat Diagram shown below.

This Trojan may be downloaded from remote sites by other malware.

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

TECHNICAL DETAILS

File Size:

244 bytes

File Type:

Other

Initial Samples Received Date:

09 May 2014

Payload:

Connects to URLs/IPs, Downloads files

Arrival Details

This Trojan may be downloaded from remote site(s) by the following malware:

  • LNK_PRESHIN.JTT

Download Routine

This Trojan accesses the following websites to download files:

  • https://{BLOCKED}mo.net/t/1.zip

It saves the files it downloads using the following names:

  • {malware path}\tmp.gif - detected as BKDR_PRESHIN.JTT

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

SOLUTION

Minimum Scan Engine:

9.700

VSAPI OPR PATTERN File:

10.785.00

VSAPI OPR PATTERN Date:

10 May 2014

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

Remove malware/grayware files dropped/downloaded by TROJ_PRESHIN.JTT. (Note: Please skip this step if the threats listed below have already been removed.)

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_PRESHIN.JTT. 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.


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