Analysis by: kathleenno
 Modified by: Karl Dominguez


Windows 2000, Windows XP, Windows Server 2003


  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes


This malware is noteworthy due to the increased potential for damage, propagation, or both, that it possesses. More specifically, this malicious script is used in what looks like a targeted attack via webmail.

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

This malware may be downloaded by embedded scripts in email messages.

It can send and forward email messages using certain addresses. The messages may contain sensitive or confidential data.

It may download files without the user's authorization.


File Size: 17,620 bytes
File Type: Script
Initial Samples Received Date: 12 May 2011
Payload: Downloads files, Steals information

It may be downloaded by embedded scripts in email messages. Once a user previews a specially crafted email, this malicious script will be downloaded from the following URL:

  • http://www.{BLOCKED}{user account name}{number}
This script may perform the following routines:
  • Sends emails to the following link:
    • http://www.{BLOCKED}
  • Forwards email messages to any of the following addresses:
    • {BLOCKED}
    • {BLOCKED}
    • {BLOCKED}
    • {BLOCKED}
    • {BLOCKED}
    • {BLOCKED}
  • Posts count of emails read:
    • http://www.{BLOCKED}{number}&rad={number}
  • Uploads contact list to the following URL:
    • http://www.{BLOCKED}{user name}{contact lists}
  • Downloads other file(s):
    • http://www.{BLOCKED}{parameters}


Minimum Scan Engine: 8.900
VSAPI OPR PATTERN File: 8.153.00
VSAPI OPR PATTERN Date: 13 May 2011

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 JS_AGENT.SMJ. 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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