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Malware type: Trojan
Destructive: No
Platform: Windows 2000, Windows XP, Windows Server 2003
In the wild: Yes


Infection Channel: Downloaded from the Internet

This malware is loaded by HTML_EXPDROP.II. It attempts to connect to a site to download a backdoor detected as BKDR_POISON.BMN.

The backdoor is executed on the affected computer. As a result, all malicious routines of the executed backdoor are exhibited on the affected system.

This Trojan may be hosted on a website and run when a user accesses the said website.

Technical Details

File size: 13,631 bytes
File type: SWF
Initial samples received date: 17 Sep 2012
Payload: Downloads files

Arrival Details

This Trojan may be hosted on a website and run when a user accesses the said website.


Once this malware is loaded by EXPLOIT.HTML, which is detected as HTML_EXPDROP.II, it attempts to connect to the following site to download a malicious file:

  • http://{BLOCKED}.{BLOCKED}.104.149/public/help/111.exe

It executes the downloaded file. As a result, malicious behavior of the downloaded file is exhibited on the affected system. Trend Micro detects the downloaded file as BKDR_POISON.BMN.


Minimum scan engine: 9.200
First VSAPI Pattern File: 9.402.03
First VSAPI Pattern Release Date: 18 Sep 2012
VSAPI OPR Pattern Version: 9.403.00
VSAPI OPR Pattern Release Date: 18 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

Remove the malware/grayware file that dropped/downloaded SWF_DROPPR.II

Step 3

Remove malware files dropped/downloaded by SWF_DROPPR.II

Step 4

Close all opened browser windows

Step 5

Scan your computer with your Trend Micro product to delete files detected as SWF_DROPPR.II. 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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Analysis By: Cris Nowell Pantanilla

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