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JS_BLACOLE.GG

November 26, 2012
 Analysis by: Anthony Joe Melgarejo
 ALIASES:

Trojan:JS/IframeRef.I (Microsoft), JS/Exploit-Blacole.gg !! (McAfee)

 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

Infection Channel:

Downloaded from the Internet


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

It does not have any propagation routine.

It does not have any backdoor routine.

It does not drop any other file.

It does not have any information-stealing capability.

This is the Trend Micro detection for files that contain a malicious script. It redirects browsers to certain sites. However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size:

1,242 bytes

File Type:

HTML, HTM

Initial Samples Received Date:

21 Nov 2012

Payload:

Connects to URLs/IPs

Arrival Details

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

Propagation

This Trojan does not have any propagation routine.

Backdoor Routine

This Trojan does not have any backdoor routine.

Dropping Routine

This Trojan does not drop any other file.

Information Theft

This Trojan does not have any information-stealing capability.

Other Details

This is the Trend Micro detection for files that contain a malicious script.

It redirects browsers to the following sites:

  • http://{BLOCKED}akis.ru:8080/forum/links/column.php

However, as of this writing, the said sites are inaccessible.

NOTES:

It does not have rootkit capabilities.

It does not exploit any vulnerability.

  SOLUTION

Minimum Scan Engine:

9.300

FIRST VSAPI PATTERN FILE:

9.542.04

FIRST VSAPI PATTERN DATE:

21 Nov 2012

VSAPI OPR PATTERN File:

9.543.00

VSAPI OPR PATTERN Date:

22 Nov 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

Close all opened browser windows

Step 3

Scan your computer with your Trend Micro product to delete files detected as JS_BLACOLE.GG. 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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