Troj/JavaBz-IA

Posted: August 30, 2012

Threat Metric

The Threat Meter is a malware assessment that SpywareRemove.com's research team is able to give every identifiable malware threat. Our Threat Meter includes several criteria based off of specific malware threats to value their severity, reach and volume. The Threat Meter is able to give you a numerical breakdown of each threat's initial Threat Level, Detection Count, Volume Count, Trend Path and Percentage Impact. The overall ranking of each threat in the Threat Meter is a basic breakdown of how all threats are ranked within our own extensive malware database. The scoring for each specific malware threat can be easily compared to other emerging threats to draw a contrast in its particular severity. The Threat Meter is a useful tool in the endeavor of seeking a solution to remove a threat or pursue additional analytical research for all types of computer users.

The following fields listed on the Threat Meter containing a specific value, are explained in detail below:

Threat Level: The threat level scale goes from 1 to 10 where 10 is the highest level of severity and 1 is the lowest level of severity. Each specific level is relative to the threat's consistent assessed behaviors collected from SpyHunter's risk assessment model.

Detection Count: The collective number of confirmed and suspected cases of a particular malware threat. The detection count is calculated from infected PCs retrieved from diagnostic and scan log reports generated by SpyHunter.

Volume Count: Similar to the detection count, the Volume Count is specifically based on the number of confirmed and suspected threats infecting systems on a daily basis. High volume counts usually represent a popular threat but may or may not have infected a large number of systems. High detection count threats could lay dormant and have a low volume count. Criteria for Volume Count is relative to a daily detection count.

Trend Path: The Trend Path, utilizing an up arrow, down arrow or equal symbol, represents the level of recent movement of a particular threat. Up arrows represent an increase, down arrows represent a decline and the equal symbol represent no change to a threat's recent movement.

% Impact (Last 7 Days): This demonstrates a 7-day period change in the frequency of a malware threat infecting PCs. The percentage impact correlates directly to the current Trend Path to determine a rise or decline in the percentage.

Threat Level:	9/10
Infected PCs:	82

First Seen:	August 30, 2012
Last Seen:	April 14, 2020
OS(es) Affected:	Windows

Troj/JavaBz-IA is a label for a variant of the Blackhole Exploit Kit (also identified as BEK or Blacole), a configurable package of exploits that use Java and other vulnerable platforms to attack your PC through your browser. Troj/JavaBz-IA and other variants of BEK are often used to install high-level PC threats (such as the sophisticated banking Trojan Zeus, which used landmark Man-in-the-browser attacks to alter some web page content and steal confidential data) and can attack multiple operating systems and browsers with a minimum of difficulty. PC users who have Java 7 are vulnerable to Troj/JavaBz-IA's favored exploit, which, as usual, allows arbitrary code to be executed without symptoms – an attack that can install malicious software without your permission. SpywareRemove.com malware researchers suggest taking all due caution with regards to both Java and your browser, as well as recommending that you use anti-malware programs to block Troj/JavaBz-IA attacks in case your other security measures fall short.

Troj/JavaBz-IA: An Example of Why Efficiency in Malware Development Isn't a Great Thing

The vulnerability that Troj/JavaBz-IA uses to its own benefit started out as a simple exploit that was newly-introduced (one hopes, by accident) in version 7 of the Java Runtime Environment. This zero-day exploit was then discovered and taken advantage of by malware authors, and in less than a single day since they posted a 'proof of concept' of their attack, Troj/JavaBz-IA spun out as an addition to the commercial Blackhole Exploit Kit package, which is sold to any online criminal with a little spare money to convert into online attacks. In any other industry, this lightning-quick turnaround would be admirable, but for PC users with Java 7, all it means is more Trojan downloader attacks to evade.

SpywareRemove.com malware researchers note that JRE 6 is not vulnerable to Troj/JavaBz-IA's exploit, which is labeled CVE 2012-4681. A recent security patch for JRE 7 users also allows them to patch out the vulnerability in question, which leaves unpatched users of Java 7 as the greatest potential victims to Troj/JavaBz-IA-related attacks. Because this Java 7 update for Troj/JavaBz-IA's vulnerability only was released late last month, SpywareRemove.com malware experts recommend that most JRE 7 users patch their Java installations as soon as possible. Failure to do so allows Troj/JavaBz-IA to be used to install any type of PC threat that a criminal could desire, up to and including high-level dangers like rootkits and spyware.

Exp/20124681-A is a closely-related PC threat, as the label for the specific type of Java code that Troj/JavaBz-IA loads to target the exploit.

Being Even Quicker to the Punch Than Troj/JavaBz-IA's Blackhole Attacks

Besides the usual patch-based protection, Troj/JavaBz-IA can also be thwarted by keeping Java disabled by default. SpywareRemove.com malware researchers note that most browser include options to disable or otherwise control how Java runs – which is a good thing, since Troj/JavaBz-IA and other variants of BEK are compatible with all popular browsers, along with both Windows and Mac OSes.

PC threats that are installed by Troj/JavaBz-IA et al include Troj/Agent-XNE (AKA Gen:Trojan.Heur.FU.bqW@a4uT4@bb, Backdoor.Darkmoon!gen5 or Trojan.Generic.KDV.699796), a backdoor Trojan that modifies system files (such as the Microsoft Media Device Service Provider) and displays itself as a fake Windows process.

Technical Details

File System Modifications

Tutorials: If you wish to learn how to remove malware components manually, you can read the tutorials on how to find malware, kill unwanted processes, remove malicious DLLs and delete other harmful files. Always be sure to back up your PC before making any changes.

The following files were created in the system:

Pre.jar

File name: Pre.jar
Size: 31.04 KB (31044 bytes)
MD5: 0cbc25ade65bcd7a28dd8ac62ea20186
Detection count: 51
Mime Type: unknown/jar
Group: Malware file
Last Updated: September 3, 2012

One Comment

Keylon says:

October 17, 2012 at 7:41 am

Your answer was just what I nedeed. It's made my day!