Analysis by: Karl Dominguez


Windows 2000, XP, Server 2003, Symbian S60


  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes


This Trojan may be unknowingly downloaded by a user while visiting malicious websites.


File Size: 53,988 bytes
File Type: SIS
Memory Resident: No
Initial Samples Received Date: 27 Sep 2010

Arrival Details

This Trojan may be unknowingly downloaded by a user while visiting malicious websites.

Other Details

This Trojan does the following:

  • This Symbian OS Software Installation Script (SIS) installs and executes the file NokiaUpdate.exe. This file is detected by Trend Micro as SYMBOS_ZBOT.A.


Minimum Scan Engine: 8.900

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

Remove malware files dropped/downloaded by SYMBOS_ZEUSMIT.A


Step 3

Scan your computer with your Trend Micro product to delete files detected as SYMBOS_ZEUSMIT.A. 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 4

Trend Micro Mobile Security Solution

Trend Micro Mobile Security Personal Edition protects Android smartphones and tablets from malicious and Trojanized applications. The App Scanner is free and detects malicious and Trojanized apps as they are downloaded, while SmartSurfing blocks malicious websites using your device's Android browser.

Download and install the Trend Micro Mobile Security App via Google Play.

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