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JS_OBFUSC.BEB
Malware type: Trojan
Destructive: No
Platform: Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
Encrypted: Yes
In the wild: Yes

Overview


Infection Channel: Downloaded from the Internet

This malware is related to a spammed message that leverages the news on “Royal Baby." The said spammed message lures users in accessing the related blog which is in actual redirects to a malicious URL.

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 does not have any propagation routine.

It does not have any backdoor routine.

It does not have any information-stealing capability.

It redirects browsers to certain sites.

Technical Details


File size: Varies
File type: HTML, HTM
Initial samples received date: 24 Jul 2013
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.

Information Theft

This Trojan does not have any information-stealing capability.

Other Details

This Trojan redirects browsers to the following sites:

  • http://{BLOCKED}ncessurplus.com/adobe/

NOTES:

It checks for the installed Java version.

If 1.5 <= Java version < 1.6.33 or 1.7.0 <= Java version < 1.7.10,

It loads a jar file from the following URL and it passes parameters to it:

  • http://{BLOCKED}ncessurplus.com/topic/accidentally-results-stay.php?aZwosKokEzNu=vzmAn&vNEop=hEIaaGrlzBScvF

It loads different parameters for 1.7.9 < Java version <=1.7.17,

It also checks for the installed Adobe Reader version.

If 8 <= Adobe Reader Version <=8.2, or 9 <= Adobe Reader Version <= 9.3, it redirects users to the following URL:

  • http://{BLOCKED}ncessurplus.com/topic/accidentally-results-stay.php?yqAFwbPCLno=5257533130&ioidSagKPlS=x&wSaZlXDijTvPq=30 2g572f5352572i572f333357312h522j2h2g562f2j&wiZCFhFFDxy=2d2b2d2b2d2b2d

It does not have rootkit capabilities.

It does not exploit any vulnerability.

Solution


Minimum scan engine: 9.300
VSAPI OPR Pattern Version: 10.177.00
VSAPI OPR Pattern Release Date: 26 Jul 2013

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Close all opened browser windows

Step 3

Scan your computer with your Trend Micro product to delete files detected as JS_OBFUSC.BEB. 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: Adrian Cofreros

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