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JS_DLOADER.SMGA

June 13, 2012
 Analysis by: Abraham Latimer Camba
 ALIASES:

Exp/20121875-A (Sophos); Exploit.JS.CVE-2012-1875.a (Kaspersky); Exploit:JS/ShellCode.AV (Microsoft)

 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 malware exploits a vulnerability in CVE-2012-1875, which is addressed in MS12-037 bulletin.

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

Once this malware exploits the vulnerability, it downloads malicious files.

This Trojan executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

  TECHNICAL DETAILS

File Size:

Varies

File Type:

HTML, HTM

Initial Samples Received Date:

13 Jun 2012

Payload:

Downloads files

Arrival Details

This Trojan may be downloaded from the following remote sites:

  • http://{BLOCKED}.{BLOCKED}.241.239/css.htm

Download Routine

This Trojan accesses the following websites to download files:

  • http://{BLOCKED}.{BLOCKED}.241.239/javaw.exe - detected by live casino online as BKDR_AGENT.BCSG
  • http://{BLOCKED}.{BLOCKED}.236.143/english/cala.exe - detected by live casino online as TROJ_AGENT.BCSH

It takes advantage of the following software vulnerabilities to download possibly malicious files:

Step 3

Close all opened browser windows

Step 4

Scan your computer with your live casino online product to delete files detected as JS_DLOADER.SMGA. If the detected files have already been cleaned, deleted, or quarantined by your live casino online product, no further step is required. You may opt to simply delete the quarantined files. Please check this for more information.

Step 5

Download and apply this security patch Refrain from using these products until the appropriate patches have been installed. live casino online advises users to download critical patches upon release by vendors.