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Threat Encyclopedia

HTML_AGENT.SMJ

ANALYSIS BY

Karl Dominguez


PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type:Trojan

  • Destructiveness:No

  • Encrypted: No

  • In the wild: Yes

OVERVIEW


This malicious script is noteworthy due to its use in what looks like a targeted attack via Webmail.

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

This is a Trend Micro detection for specially crafted email messages that contain a malicious script. The said script connects to a URL to download and run another malicious script detected as JS_AGENT.SMJ.

TECHNICAL DETAILS

File Size:

Varies

File Type:

MSG

Initial Samples Received Date:

13 May 2011

NOTES:

This is a Trend Micro detection for specially crafted email messages that contain a malicious script. The said script connects to the following URL to download and run another malicious script detected as JS_AGENT.SMJ:

  • http://www.{BLOCKED}eofpublic.com/Microsoft.MSN.hotmail/mail/rdm/rdm.asp?a={user account name}{number}

SOLUTION

Minimum Scan Engine:

8.900

VSAPI OPR PATTERN File:

8.155.00

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

Remove malware files dropped/downloaded by HTML_AGENT.SMJ

     JS_AGENT.SMJ

Step 3

Scan your computer with your Trend Micro product to delete files detected as HTML_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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