Analysis by: Nikko Tamana
ALIASES:

W32/Zbot.ALG!tr (Fortinet), VirTool:Win32/CeeInject.gen!HL (Microsoft), PWS-Zbot.gen.alg (NAI), a variant of Win32/Injector.WDE trojan (NOD32), Trojan.Agent.AWRF (Bitdefender)

 PLATFORM:

Windows Vista, Windows 7

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

  • 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 executes then deletes itself afterward.

  TECHNICAL DETAILS

File Size: 136,192 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 05 Sep 2012

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.

Other Details

This Trojan connects to the following possibly malicious URL:

  • {BLOCKED}.{BLOCKED}.222.131
  • {BLOCKED}.{BLOCKED}.206.132

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 9.372.04
FIRST VSAPI PATTERN DATE: 05 Sep 2012
VSAPI OPR PATTERN File: 9.372.04
VSAPI OPR PATTERN Date: 06 Sep 2012

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Scan your computer with your Trend Micro product to delete files detected as TROJ_INJECT.BOS. 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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