HTML_FAKEALRT.FR

October 09, 2012
 Analysis by: MarfelTi
 ALIASES:

Microsoft : TrojanDownloader:JS/Renos Mcafee : Generic FakeAlert.al

 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 malware displays fake alerts of virus infection, and attempts to access certain websites. It also installs a rogue antivirus onto the affected system, and certain malicious routines can be exhibited on the system itself.

This Trojan may be unknowingly downloaded by a user while visiting malicious websites. It may be hosted on a website and run when a user accesses the said website.

It attempts to access certain websites. However, the websites are inaccessible as of this writing.

It installs a fake antivirus/antispyware software.

  TECHNICAL DETAILS

File Size:

2,771 bytes

File Type:

HTML, HTM

Memory Resident:

No

Initial Samples Received Date:

04 May 2011

Payload:

Connects to URLs/Ips, Displays message/message boxes

Arrival Details

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

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

Other Details

This Trojan attempts to access certain websites. However, the websites are inaccessible as of this writing.

Rogue Antivirus Routine

This Trojan displays the following fake alerts:

  • The website contains exploits that can launch a malicious code on your computer.
  • Suspicious network activity detected.
  • There might be an active spyware running on your computer
  • Check your computer for viruses and malware.
  • Purchase for secure Internet surfing (Recommended).

It installs a fake antivirus/antispyware software.

  SOLUTION

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

Close all opened browser windows

Step 3

Scan your computer with your Trend Micro product to delete files detected as HTML_FAKEALRT.FR. 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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