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Malware type: Trojan
Destructive: No
Platform: Windows 98, ME, NT, 2000, XP, Server 2003
Encrypted: No
In the wild: Yes


Trend Micro has flagged this malware as noteworthy due to the increased potential for damage, propagation, or both, that it possesses.

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

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

It displays fake alerts.

Technical Details

File size: 3,297 bytes
File type: HTML, HTM
Memory resident: No
Initial samples received date: 21 Dec 2009
Payload: Downloads files

Arrival Details

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

It may be downloaded from the following remote sites:

  • http://{BLOCKED}

Download Routine

This Trojan accesses the following websites to download files:

  • http: //{BLOCKED}{random characters}.js - detected by Trend Micro as JS_RENOS.WCJ
  • http: //{BLOCKED}{random characters}.js - also detected as JS_RENOS.WCJ
  • http: //{BLOCKED} - detected as TROJ_KRAP.DAM

Rogue Antivirus Routine

This Trojan displays fake alerts.


Minimum scan engine: 8.900
First VSAPI Pattern File: 6.708.06
First VSAPI Pattern Release Date: 21 Dec 2009
VSAPI OPR Pattern Version: 6.709.00
VSAPI OPR Pattern Release Date: 21 Dec 2009

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_FAKEAV.WAF

Step 3

Close all opened browser windows

Step 4

Scan your computer with your Trend Micro product to delete files detected as HTML_FAKEAV.WAF. 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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