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JAVA_AGENT.AJ

October 09, 2012
 Analysis by: rolandde
 ALIASES:

Troj/JavaMal-C (Sophos); JV/MailSend.b (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

This Trojan is a Java component of the Blackhole Exploit Kit. It aids in deobfuscating some parameters on the exploit kit's HTTP session, thus, helping the kit execute its intended payload.

This Trojan executes when a user accesses certain websites where it is hosted.

  TECHNICAL DETAILS

File Size:

5,615 bytes

Memory Resident:

No

Initial Samples Received Date:

05 Oct 2011

Arrival Details

This Trojan executes when a user accesses certain websites where it is hosted.

It may be downloaded from the following remote sites:

  • http://{BLOCKED}nix.com/content/worms.jar

NOTES:

It is a Java component of the Blackhole Exploit Kit. It aids in deobfuscating some parameters on the exploit kit's HTTP session, thus, helping the kit execute its intended payload.

  SOLUTION

Minimum Scan Engine:

9.200

FIRST VSAPI PATTERN FILE:

8.474.08

FIRST VSAPI PATTERN DATE:

05 Oct 2011

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 JAVA_AGENT.AJ. 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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