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TROJ_DLOADER.ZAP

January 10, 2013
 Analysis by: Michael Cabel
 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:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • 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 executes then deletes itself afterward.

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

  TECHNICAL DETAILS

File Size:

189,536 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

09 Jan 2013

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.

Installation

This Trojan executes then deletes itself afterward.

Download Routine

This Trojan connects to the following URL(s) to download its component file(s):

  • http://{BLOCKED}raequine.com/8LhMz.exe
  • http://{BLOCKED}hg.com/dfWobGGH.exe
  • http://{BLOCKED}t-rentals.net/Qsad9cAN.exe

Trend Micro detects the dowloaded file as:

  • TSPY_ZBOT.MHV

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:

9.300

FIRST VSAPI PATTERN FILE:

9.646.01

FIRST VSAPI PATTERN DATE:

09 Jan 2013

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 the malware/grayware file dropped/downloaded by TROJ_DLOADER.ZAP

    TSPY_ZBOT.MHV

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_DLOADER.ZAP. 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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